Separation and Purification Technology最新文献

筛选
英文 中文
Programmable hourglass nanochannels in thermally rearranged copolyimides for advanced gas separation 可编程沙漏纳米通道在热重排共聚物先进气体分离
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-04 DOI: 10.1016/j.seppur.2026.137141
Haodi Wang , Yu Zhang , Hesheng Li , Shuangjiang Luo , Xin Wei
{"title":"Programmable hourglass nanochannels in thermally rearranged copolyimides for advanced gas separation","authors":"Haodi Wang ,&nbsp;Yu Zhang ,&nbsp;Hesheng Li ,&nbsp;Shuangjiang Luo ,&nbsp;Xin Wei","doi":"10.1016/j.seppur.2026.137141","DOIUrl":"10.1016/j.seppur.2026.137141","url":null,"abstract":"<div><div>A central challenge in developing thermally rearranged (TR) polymer membranes lies in navigating the complex interplay between polymer structure and performance, where achieving a synergistic combination of high gas permeability, selectivity, and mechanical strength through precursor design is non-trivial. To overcome this limitation, we designed a series of copolyimide precursors from 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), a bulky diamine (TFDB), and ortho-functionalized diamines with varied bridging units (p-HAB, BAS, 6FAP). We demonstrate that the synergistic combination of rigid, bulky segments and ortho-functional groups guides the formation of a unique “hourglass-shaped” multi-modal pore architecture upon thermal rearrangement, as directly evidenced by positron annihilation lifetime spectroscopy (PALS). This tailored nanostructure serves as molecular highways, concurrently enhancing gas transport pathways and molecular sieving capability. The resulting TR membrane (CoHPI-6FAP-450) thus achieves an exceptional combination of a CO<sub>2</sub> permeability of ∼8000 Barrer and a CO<sub>2</sub>/CH<sub>4</sub> selectivity of 22, surpassing the 2008 Robeson upper bound, while retaining a robust mechanical strength (&gt;60 MPa). This work provides a definitive precursor design strategy for engineering multi-modal pore architectures, paving the way for high-performance TR membranes that reconcile the critical balance between separation performance and mechanical integrity.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137141"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interchain hydrogen bonding in one-dimensional benzimidazolone-based covalent organic frameworks: charge modulation for improved gold recovery efficiency 一维苯并咪唑酮基共价有机骨架中的链间氢键:电荷调制提高金回收率
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-03 DOI: 10.1016/j.seppur.2026.137144
Zhen-Wen Zhang , Cheng-Peng Niu , Sai-Jin Xiao , Hao-Xuan He , Qiang Shi , Zhi-Hao Xue , Bin Lin , Ru-Ping Liang , Li Zhang , Jian-Ding Qiu
{"title":"Interchain hydrogen bonding in one-dimensional benzimidazolone-based covalent organic frameworks: charge modulation for improved gold recovery efficiency","authors":"Zhen-Wen Zhang ,&nbsp;Cheng-Peng Niu ,&nbsp;Sai-Jin Xiao ,&nbsp;Hao-Xuan He ,&nbsp;Qiang Shi ,&nbsp;Zhi-Hao Xue ,&nbsp;Bin Lin ,&nbsp;Ru-Ping Liang ,&nbsp;Li Zhang ,&nbsp;Jian-Ding Qiu","doi":"10.1016/j.seppur.2026.137144","DOIUrl":"10.1016/j.seppur.2026.137144","url":null,"abstract":"<div><div>One-dimensional covalent organic frameworks (1D COFs), as linear crystalline porous polymers, are highly promising materials for gold recovery due to their exceptional atomic utilization efficiency and fully exposed active sites. However, their development for gold adsorption is constrained by the lack of gold-specific organic building blocks and limited electronic regulation strategies. Herein, we introduce benzoimidazolone units into 1D COFs and design interchain hydrogen bond through molecular engineering to rationally modulate their charge distribution. The constructed 1D COF, featuring improved crystallinity/stability, enriched recognition sites, and enhanced protonation capability, demonstrates superior performance in gold recovery with rapid kinetics, excellent selectivity and a high adsorption capacity of 2900.56 mg g<sup>−1</sup>. Theoretical calculations reveal the multiple and synergistic interactions between benzimidazolone and AuCl<sub>4</sub><sup>−</sup>, and elucidate the effect of hydrogen bonding on electron redistribution/transfer towards benzimidazolone, thereby promoting its protonation and significantly enhancing the adsorption and reduction capabilities for gold. This work highlights the significance of hydrogen bonding on charge modulation and develops a benzimidazolone-based 1D COFs for efficient gold recycling from electronic waste.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137144"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Upcycled PET carbon dots build an S-scheme Fe2O3 heterojunction photocatalyst for visible-light degradation of tetracycline 升级后的PET碳点构建了S-scheme Fe2O3异质结光催化剂,用于四环素的可见光降解
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-01 DOI: 10.1016/j.seppur.2026.137122
Pandi Kalimuthu , Gopi Kalaiyarasan , Jinho Jung , Diwakar Tiwari
{"title":"Upcycled PET carbon dots build an S-scheme Fe2O3 heterojunction photocatalyst for visible-light degradation of tetracycline","authors":"Pandi Kalimuthu ,&nbsp;Gopi Kalaiyarasan ,&nbsp;Jinho Jung ,&nbsp;Diwakar Tiwari","doi":"10.1016/j.seppur.2026.137122","DOIUrl":"10.1016/j.seppur.2026.137122","url":null,"abstract":"<div><div>Polyethylene terephthalate-derived carbon dots (PET-CDs) were interfaced with iron oxide (Fe<sub>2</sub>O<sub>3</sub>) to develop a visible-light PET-CDs/Fe<sub>2</sub>O<sub>3</sub> photocatalyst for tetracycline (TC) removal. Waste PET bottles were upcycled via a peroxide-free route, enabling oxidant-free operation. The photocatalyst forms a defect-rich, mesoporous carbon-dot network with uniformly dispersed Fe<sub>2</sub>O<sub>3</sub> nanoparticles, enhancing adsorption and interfacial charge transport. This study demonstrates efficient TC removal at a relatively high initial concentration (<em>C₀</em> = 100 mg L<sup>−1</sup>) under visible-light (λ &gt; 420 nm) without added oxidants. The optimized PET-CDs/Fe<sub>2</sub>O<sub>3</sub> (0.4) reaches 98.2% TC removal. Kinetics follow a pseudo-first-order model, and blank tests confirm negligible photolysis and dark adsorption. The TOC and LC-MS results show rapid degradation followed by slower oxidation. Mineralization is substantial, with TOC decreasing from 100 to 34 mg L<sup>−1</sup> at 4 h and reaching 89.6% removal at 10 h. The PET-CDs/Fe<sub>2</sub>O<sub>3</sub> photocatalyst operates across pH 3–11. Phosphate reduces activity by competitive site blocking. At least 80% efficiency is retained over repeated cycles. Convergent evidence supports an S-scheme pathway rather than a type-II junction. DRS-Tauc analysis and band alignment indicate favorable energetic offsets and interfacial band bending. Steady-state PL shows selective quenching of PET-CDs emission with enhanced red Fe<sub>2</sub>O<sub>3</sub> or interfacial emission. Transient photocurrent and EIS Nyquist plots reveal enhanced charge separation and reduced charge-transfer resistance. Scavenger tests and ESR identify h<sup>+</sup> and •O<sub>2</sub><sup>−</sup> as dominant species, with •OH secondary. LC-MS tracking shows early functional-group loss products at <em>m</em>/<em>z</em> 417 and 402, followed by lower-mass fragments (m/z 301–231 and 189–72), confirming stepwise oxidation toward mineralization.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137122"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146101347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sulfonamides extraction from environmental water using natural hydrophobic deep eutectic solvent: COSMO-RS calculations and ANN-GA optimization 天然疏水深共熔溶剂从环境水中提取磺胺类化合物:cosmos - rs计算和ANN-GA优化
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-10 DOI: 10.1016/j.seppur.2026.137213
Jiacao Wu , Yi Kuang , Shengxiang Yang, Xu Han, Yiyu Qi
{"title":"Sulfonamides extraction from environmental water using natural hydrophobic deep eutectic solvent: COSMO-RS calculations and ANN-GA optimization","authors":"Jiacao Wu ,&nbsp;Yi Kuang ,&nbsp;Shengxiang Yang,&nbsp;Xu Han,&nbsp;Yiyu Qi","doi":"10.1016/j.seppur.2026.137213","DOIUrl":"10.1016/j.seppur.2026.137213","url":null,"abstract":"<div><div>To address the challenge of efficiently removing sulfonamides (SAs) from environmental water, a vortex-assisted liquid-liquid microextraction method using an L-menthol-based natural hydrophobic deep eutectic solvent (NaHDES), combined with ultra-performance liquid chromatography, was employed. The single-factor experiments, response surface methodology, and artificial neural network coupled with genetic algorithm (ANN-GA) were applied to optimize the key extraction parameters. Under the optimized conditions, the method exhibited excellent linearity (1.67–500 μg·L<sup>−1</sup>), low limits of detection (0.42–0.77 μg·L<sup>−1</sup>), relative standard deviations of 0.23–4.27%, and negligible matrix effects, as evaluated using real water samples from different sources. The extraction mechanism of SAs by the NaHDES was investigated using the conductor-like screening model for real solvents (COSMO-RS). Moreover, the validated method was successfully applied to environmental water samples. Finally, the results from three green chemistry assessment tools, including AGREE, AGREEprep and ComplexGAPI, demonstrated the greenness of the method. Overall, the proposed method is dispersant-free, simple, time-saving, environmentally friendly, and highly efficient, making it well suited for the analysis of SAs in different water samples.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137213"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Green and synergistic process for high-efficiency recycling and valorization of nickel smelting slag 镍冶炼渣高效回收与增值的绿色协同工艺
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-11 DOI: 10.1016/j.seppur.2026.137205
Xiaoyu Tan , Liang Zhou , Yuchun He , Min Chen , Xingbang Wan
{"title":"Green and synergistic process for high-efficiency recycling and valorization of nickel smelting slag","authors":"Xiaoyu Tan ,&nbsp;Liang Zhou ,&nbsp;Yuchun He ,&nbsp;Min Chen ,&nbsp;Xingbang Wan","doi":"10.1016/j.seppur.2026.137205","DOIUrl":"10.1016/j.seppur.2026.137205","url":null,"abstract":"<div><div>Nickel smelting slag is an important secondary resource since its nickel content often exceeds that of certain primary ores. In this study, a novel process of recycling valuable metals from nickel slag was developed and experimentally verified, which can help Ni, Cu, and Co selectively separated from the slag. Under optimal conditions (650 °C, 90 min, 5%SO<sub>2</sub>–20%O<sub>2</sub>–75%Ar atmosphere, and Na<sub>2</sub>SO<sub>4</sub>/slag mass ratio of 0.5,1), the water-leaching efficiencies of Ni, Cu, and Co reached 96.5%, 99.7%, and 81.4%, respectively, whereas most Fe, Si, and other impurities were retained in the solid residue. Moreover, the reaction and catalysis mechanism were experimentally investigated and concluded. It was found that controlled gas atmosphere and temperature can achieve the selective sulfation of Ni, Cu, and Co into soluble sulfates, while Fe and Si remained as stable oxides, and the formation of nickel ferrite (NiFe<sub>2</sub>O<sub>4</sub>) was identified as a major inhibitory phase that limited Ni recovery. The addition of Na<sub>2</sub>SO<sub>4</sub> promoted the generation of a low-melting-point salt (NaMgFe(SO<sub>4</sub>)<sub>3</sub>), which effectively suppressing NiFe<sub>2</sub>O<sub>4</sub> formation and improving overall recovery efficiency. Furthermore, this process could utilize industrial SO<sub>2</sub> off-gases as the sulfur source, and a ‘waste-treats-waste’ approach that converts harmful emissions into reactive agents was then established. This study provides a green, acid-free, and economically viable pathway for the comprehensive utilization of nickel slag and offers valuable guidance for the sustainable recovery of valuable metals from metal-bearing secondary resources.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137205"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zeolite P synthesis based on dephosphorized ash and its adsorption of Cd (II) ions 脱磷灰合成P型沸石及其对Cd (II)离子的吸附
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-05 DOI: 10.1016/j.seppur.2026.137154
Cheng Chen , Lihua Wang , Fei Wang , Nan Xu
{"title":"Zeolite P synthesis based on dephosphorized ash and its adsorption of Cd (II) ions","authors":"Cheng Chen ,&nbsp;Lihua Wang ,&nbsp;Fei Wang ,&nbsp;Nan Xu","doi":"10.1016/j.seppur.2026.137154","DOIUrl":"10.1016/j.seppur.2026.137154","url":null,"abstract":"<div><div>Dephosphorized ash (DA) retains considerable potential for zeolite synthesis due to its inherent silicon and aluminum content after phosphorus extraction. In this study, a one-step alkaline hydrothermal method was employed to promote the formation of zeolite P, and its adsorption performance toward Cd (II) ions in aqueous solution was systematically investigated. The presence of OH<sup>−</sup> ions in the alkaline environment effectively facilitates the dissolution and hydrolysis of the original DA structure. An appropriate hydrothermal temperature (150 °C) and sufficient reaction time (9 h) ensure that zeolite P is the dominant crystalline product. The synthesized zeolite P exhibits an optimal Cd (II) adsorption capacity of 33.08 mg/g at pH 5, which is associated with its negatively charged surface as indicated by zeta potential analysis. The adsorption behavior of Cd (II) is well described by the Langmuir isotherm model and pseudo-second-order kinetic model. Mechanistic analysis suggests that Cd (II) adsorption on zeolite P involves ion exchange and surface complexation via dehydration–condensation reactions. Furthermore, density functional theory (DFT) calculations indicate that Cd (II) preferentially binds to Al<img>O sites to form Cd<img>O bonds, owing to the stronger interaction at Al-associated hydroxyl groups compared with Si-associated sites. Overall, this study provides a feasible strategy for converting DA into zeolite P and offers insights into its application for Cd (II) removal, which can realize a waste to waste utilization pathway.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137154"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid ag and Pb extraction and high-purity material regeneration from silver-containing waste via selective reduction, leaching, and precipitation 通过选择性还原、浸出和沉淀从含银废物中快速提取银、铅和高纯材料再生
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-09 DOI: 10.1016/j.seppur.2026.137204
Yang Zhao , Weifeng Liu , Baiqi Sun , Duchao Zhang , Lin Chen , Tianzu Yang , Qunli Zhou
{"title":"Rapid ag and Pb extraction and high-purity material regeneration from silver-containing waste via selective reduction, leaching, and precipitation","authors":"Yang Zhao ,&nbsp;Weifeng Liu ,&nbsp;Baiqi Sun ,&nbsp;Duchao Zhang ,&nbsp;Lin Chen ,&nbsp;Tianzu Yang ,&nbsp;Qunli Zhou","doi":"10.1016/j.seppur.2026.137204","DOIUrl":"10.1016/j.seppur.2026.137204","url":null,"abstract":"<div><div>Noble antimony chloride leaching residue represents an important silver-bearing secondary resource that also contains Pb, Sb, and trace Au. However, existing processes predominantly focus on silver extraction and are constrained by excessive reagent consumption, limited selectivity, and low overall recovery. In this study, a novel ligand-free and integrated process was developed, comprising alkaline dechlorination, H<sub>2</sub>O<sub>2</sub>–HNO<sub>3</sub> synergistic oxidative leaching, stepwise precipitation, and direct hydrazine reduction, enabling the efficient recovery of silver together with the selective separation of associated metals. Thermodynamic analysis demonstrated that the alkaline reduction–synergistic leaching strategy facilitates preferential dissolution of Ag and Pb while enriching Au and Sb in the residue. Under optimal conditions, the leaching efficiencies of Ag and Pb reached 99.2% and 79.4%, respectively, with effective suppression of NO<sub>2</sub> emission. Subsequent sulfate and chloride precipitation yielded high-purity products, including ultrafine Ag powder (99.7%) and PbSO<sub>4</sub> (99.3%). The overall direct recoveries of Ag and Pb were 98.9% and 78.6%, while the remaining residue was upgraded to a high-grade Au<img>Sb concentrate (Au 2.92%, Sb 23.8%). The process was successfully validated at an industrial scale in an antimony smelter, enabling annual recovery of 1.62 t Au and 1.4 t Ag, with reductions of 57% in reagent cost and 72.9% in wastewater discharge. This work provides a sustainable, low-emission, and industrially scalable route for the comprehensive valorization of high-Ag chloride residues.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137204"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Controllable design of poly(ionic liquid) coatings for enhanced artemisinin purification 用于增强青蒿素纯化的聚离子液体涂层的可控设计
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-06 DOI: 10.1016/j.seppur.2026.137145
Xingxing Li , Jianing Qi , Mingjing Shi , Yuan Yao , Yingying Cao , Xue Wang , Hui Wang
{"title":"Controllable design of poly(ionic liquid) coatings for enhanced artemisinin purification","authors":"Xingxing Li ,&nbsp;Jianing Qi ,&nbsp;Mingjing Shi ,&nbsp;Yuan Yao ,&nbsp;Yingying Cao ,&nbsp;Xue Wang ,&nbsp;Hui Wang","doi":"10.1016/j.seppur.2026.137145","DOIUrl":"10.1016/j.seppur.2026.137145","url":null,"abstract":"<div><div>Artemisinin is primarily derived from <em>Artemisia annua</em> L. However, due to the complex composition of its leaf extract, the purification and separation of artemisinin remain a significant challenge. In this work, various poly(ionic liquid)s (PILs) containing polar ester groups and non-polar long-chain alkyl groups were synthesized through radical polymerization. Subsequently, these PILs were made into coatings with controllable pore sizes and adjustable hydrophobicity. The ethyl octadecanoate based PIL coating showed excellent capability to intensify this purification process. The product purity could reach 96.8% after one crystallization step under the optimal conditions, approximately 30.8% higher than the traditional method. And the product purity could reach 99.9% after three sequential separation processes. In addition, the adsorption kinetics of wax oil on the PIL coating were studied, and the results indicated that it followed a pseudo-first-order kinetic model with a maximum adsorption capacity of 226.33 mg/g. Mechanism analysis demonstrated that hydrogen bonding and van der Waals forces between the wax oil (the main impurity in the extract) and PIL facilitated the adsorption of the wax oil, thereby increasing the purity of artemisinin.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137145"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synergetic Zn doping and KOH etching of CeO2 for enhanced H2S oxidation via electronic structure reconstruction 协同Zn掺杂和KOH蚀刻CeO2通过电子结构重建增强H2S氧化
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-10 DOI: 10.1016/j.seppur.2026.137207
Honghong Yi , Kai Chen , Hongkun Ni , Yiming Ma , Xiaolong Tang , Qingjun Yu , Fengyu Gao , Shunzheng Zhao
{"title":"Synergetic Zn doping and KOH etching of CeO2 for enhanced H2S oxidation via electronic structure reconstruction","authors":"Honghong Yi ,&nbsp;Kai Chen ,&nbsp;Hongkun Ni ,&nbsp;Yiming Ma ,&nbsp;Xiaolong Tang ,&nbsp;Qingjun Yu ,&nbsp;Fengyu Gao ,&nbsp;Shunzheng Zhao","doi":"10.1016/j.seppur.2026.137207","DOIUrl":"10.1016/j.seppur.2026.137207","url":null,"abstract":"<div><div>This study employs a synergistic strategy of Zn doping and KOH etching to precisely regulate the physicochemical properties of CeO<sub>2</sub>, significantly enhancing its H<sub>2</sub>S catalytic oxidation performance. Experimental results indicate that Zn doping induces lattice expansion of CeO<sub>2</sub>, while KOH etching further removes Zn, increases Ce<sup>3+</sup> and oxygen vacancy concentrations, thereby optimizing surface acidity-basicity and redox capability. The obtained E-Zn/CeO<sub>2</sub> material exhibits excellent H<sub>2</sub>S conversion, reaction and kinetics, while promoting the selective formation of SO<sub>2</sub>. Mechanistic studies reveal that H<sub>2</sub>S undergoes adsorption and dissociation via μ<sub>2</sub>-OH/–COOH groups on the material surface, with the oxidation process following the MvK mechanism, where oxygen vacancies play a key role in adsorption and lattice oxygen transfer. Theoretical calculations further demonstrate that the synergistic modification induces reconstruction of the electronic structure of CeO<sub>2</sub>, including weakened covalency of Ce<img>O bonds and a spin-state transition of O<sub>2p</sub> orbitals, which significantly reduces the oxygen vacancy formation energy (as low as −1.47 eV) and enhances structural stability. This work provides both experimental and theoretical foundations for the rational design of highly efficient H<sub>2</sub>S catalytic materials.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137207"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Critical reviews on recovery of valuable metals from spent petroleum catalysts 从废石油催化剂中回收有价金属的研究进展
IF 9 1区 工程技术
Separation and Purification Technology Pub Date : 2026-06-19 Epub Date: 2026-02-10 DOI: 10.1016/j.seppur.2026.137206
Haotian Gan , Baohuai Zhao , Qing Liu , Xuefeng He , Zhisheng Shi , Shuai Han , Kezhi Li , Bo Liu , Shengen Zhang , Yunji Ding
{"title":"Critical reviews on recovery of valuable metals from spent petroleum catalysts","authors":"Haotian Gan ,&nbsp;Baohuai Zhao ,&nbsp;Qing Liu ,&nbsp;Xuefeng He ,&nbsp;Zhisheng Shi ,&nbsp;Shuai Han ,&nbsp;Kezhi Li ,&nbsp;Bo Liu ,&nbsp;Shengen Zhang ,&nbsp;Yunji Ding","doi":"10.1016/j.seppur.2026.137206","DOIUrl":"10.1016/j.seppur.2026.137206","url":null,"abstract":"<div><div>Catalysts play a significant role in oil refining field. Reforming catalysts, hydrogenation catalysts and fluid catalytic cracking catalysts (FCC catalysts) are extensively employed in the petroleum refining, which account for over 90% of total catalysts. Consequently, large amounts of spent catalysts are generated once they lose the effectiveness and end of life. Spent catalysts are classified as hazardous waste and their disposal has become a great concern for the refineries. Recovery of spent catalysts has attracted great attention due to the environmental issues and economic benefits as containing valuable metals (such as Pt, Pd, Co, Mo, Ni, V, rare earth metals) as well. This review summarized the recycling technologies on the recovery of valuable metals from spent petroleum catalysts, as well as the latest achievements of the authors' group. More recycling technologies with less environmental impacts have been developed in recent years. For instance, pyrometallurgical enrichment of valuable metals have become the research focus for recovery of spent reforming catalysts and hydrogenation catalysts. Hydrometallurgical leaching and alkali roasted methods are the main recycling technologies, which were widely used in industry. The comparison of different technologies has been provided and the existing challenges have also been put forward. Finally, with the aim to promote the sustainable development of petroleum industry, several considerations for highly and efficiently recovery of valuable metals from spent petroleum catalyst have been proposed.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137206"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信
小红书