He Zhang, Zhihui Ma, Zhen Wang, Yong Liu, Fanxin Lin, Guodong Miao, Aimin Ju, Xuanhui Qu, Ping Li
{"title":"Tuning of Zr content in TiMn<sub>2</sub> based multinary alloys by powder metallurgy to fabricate superior hydrogen storage properties.","authors":"He Zhang, Zhihui Ma, Zhen Wang, Yong Liu, Fanxin Lin, Guodong Miao, Aimin Ju, Xuanhui Qu, Ping Li","doi":"10.1016/j.jcis.2024.12.043","DOIUrl":"10.1016/j.jcis.2024.12.043","url":null,"abstract":"<p><p>TiMn<sub>2</sub> based multinary alloys make full use of the high abundance of rare earth resources in attractive applications of hydrogen storage but suffer from mediocre hydrogen ab/desorption kinetics and lack the in-depth mechanism analysis of hydrogenation/dehydrogenation behavior. Herein, on the basis of current research on compositional modulation, we utilize the low-cost powder metallurgy method to prepare Ti<sub>0.9+x</sub>Zr<sub>0.1-x</sub>Mn<sub>1.4</sub>Cr<sub>0.4</sub>V<sub>0.2</sub> (x = -0.05, 0, 0.05) hydrogen storage alloy powders, which effectively reduces the preparation cost. What's more, the fractional substitution of Zr for Ti boosts the hydrogenation by introducing defects and modulating the d-band center. The synthesized Ti<sub>0.85</sub>Zr<sub>0.15</sub>Mn<sub>1.4</sub>Cr<sub>0.4</sub>V<sub>0.2</sub> hydrogen storage sample manifests exceptional hydrogen kinetics (almost no incubation) and hydrogen storage capacity (1.73 wt%). The intrinsic reaction mechanism of Zr substitution is elucidated from the viewpoint of microstructure and strain engineering, combined with density functional theory (DFT) analysis. This study provides valuable insights into the design and application of high-performance TiMn<sub>2</sub> based multinary hydrogen storage alloys.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"1040-1050"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xinjuan Zhang, Menghan Chang, Di Wang, Lin Wang, Xuan Yang, Zhaohang Ben, Qiang Zhang, Yan Lu
{"title":"Enhanced photocatalytic performance in seawater of donor-acceptor type conjugated polymers through introduction of alkoxy groups in the side chain.","authors":"Xinjuan Zhang, Menghan Chang, Di Wang, Lin Wang, Xuan Yang, Zhaohang Ben, Qiang Zhang, Yan Lu","doi":"10.1016/j.jcis.2024.11.242","DOIUrl":"10.1016/j.jcis.2024.11.242","url":null,"abstract":"<p><p>Previous studies have demonstrated that the donor (D)-acceptor (A) structure enables conjugated polymers (CPs) to effectively inhibit charge recombination, reduce exciton binding energy to a minimum, and broaden the light absorption spectrum, ultimately enhancing photocatalytic activity. Besides, side chain engineering is an effective approach to enhance photocatalytic performance by regulating surface chemistry and energy band structure of CPs. Herein, three D-A type CPs, namely TPD-T, TPD-MOT and TPD-DOT, were designed and synthesized using thieno[3,4-c]pyrrole-4,6-dione (TPD) as A units and thiophene with different alkyl/alkoxy groups side chain (as 3-octylthiophene (T), 3-methoxythiophene (MOT) and 3,4-ethylenedioxythiophene (DOT)) as D units, via an atom- and step-economic CH/CH cross-coupling polycondensation. The photocatalytic hydrogen production performance of these polymers driven by visible light was systematically evaluated in pure water and natural seawater. The results show that the hydrogen evolution rates (HERs) of the as-synthesized CPs in pure water and natural seawater significantly increased by 5 and 7 times, respectively, when the number of alkoxy groups on the side chain of polymers increased from 0 to 2. In particular, HERs of three polymers in natural seawater are distinctly better than that in pure water. Further, the steady-state photoluminescence (PL), time-resolved fluorescence decay, and electrochemical impedance spectroscopy (EIS) studies combined with density functional theory (DFT) simulations were carried out to figure out the possible mechanism of the enhanced photocatalytic performance of CPs by side chain engineering. This work indicates that side chain engineering contributes significantly to determine the photocatalytic activity of D-A polymers-based photocatalysts, and could serve as guidelines for organic photocatalysts with highly efficient hydrogen evolution performance.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"1151-1163"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takeshi Kobayashi, Kristo Kotsi, Teng Dong, Ian McRobbie, Alexander Moriarty, Panagiota Angeli, Alberto Striolo
{"title":"The solvation of Na<sup>+</sup> ions by ethoxylate moieties enhances adsorption of sulfonate surfactants at the air-water interface.","authors":"Takeshi Kobayashi, Kristo Kotsi, Teng Dong, Ian McRobbie, Alexander Moriarty, Panagiota Angeli, Alberto Striolo","doi":"10.1016/j.jcis.2024.11.229","DOIUrl":"10.1016/j.jcis.2024.11.229","url":null,"abstract":"<p><strong>Hypothesis: </strong>Experiments show pronounced synergy in the reduction of surface tension when the nonionic surfactant Poly(oxy-1,2-ethanediyl), .alpha.-tris(1-phenylethyl)phenyl-.omega.-hydroxy- (Ethoxylated tristyrylphenol, EOT) is mixed with the anionic surfactant Sodium 4-dodecylbenzenesulfonate (NaDDBS). We hypothesize that the synergism is due to counterion (cation) effects. This would be unusual as one of the surfactants is nonionic. To test this hypothesis, the molecular mechanisms responsible need to be probed using experiments and simulations.</p><p><strong>Approach: </strong>The interfacial properties of mixtures comprising EOT and NaDDBS are investigated using equilibrium molecular dynamics (MD) simulations. Free energy calculations using thermodynamic integration and umbrella sampling methods are employed to analyze the molecular interactions at surface and reveal the role of counterion solvation on the results observed. Simulation snapshots and trajectories are interrogated to confirm the findings.</p><p><strong>Findings: </strong>Simulation results indicate that the ethoxylate moieties solvate Na<sup>+</sup> ions, forming long-lasting cation-EOT complexes. Free energy calculations suggest that these complexes are more stable at the interface than in the bulk, likely because of changes in the dielectric properties of water. The cation-EOT complexes, in turn, cause a stronger affinity between the interface and NaDDBS when EOT is present. Similar studies conducted for mixtures of EOT and cationic surfactant Dodecylammonium chloride (DAC) do not show evidence of Cl<sup>-</sup> ions solvation via the ethoxylate moieties, while the DAC headgroup was found to form hydrogen bonds with the EOT headgroup. This suggests that the mechanisms observed are likely ion specific.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"924-933"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yali Wang, Ruihui Gan, Xiaodong Shao, Binting Dai, Lin Ma, Jinzheng Yang, Jingli Shi, Xiangwu Zhang, Chang Ma, Zhanshuang Jin
{"title":"Co/CoO hetero-nanoparticles incorporated into lignin-derived carbon nanofibers as a self-supported bifunctional oxygen electrocatalyst for rechargeable Zn-air batteries.","authors":"Yali Wang, Ruihui Gan, Xiaodong Shao, Binting Dai, Lin Ma, Jinzheng Yang, Jingli Shi, Xiangwu Zhang, Chang Ma, Zhanshuang Jin","doi":"10.1016/j.jcis.2024.12.035","DOIUrl":"10.1016/j.jcis.2024.12.035","url":null,"abstract":"<p><p>The large-scale application of rechargeable Zn-air batteries (ZABs) necessitates the development of high-efficiency and cost-effective bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, the density functional theory calculations were performed to reveal the charge redistribution induced by the Co/CoO heterojunction integrating with N-doped carbon, which could optimize the d-band center, thereby accelerating O<sub>2</sub> transformed into OOH* in the ORR and the conversion of O* into OOH* in OER. Guided by theoretical calculations, Co/CoO hetero-nanoparticles-decorated lignin-derived N-doped porous carbon nanofibers (Co-LCFs-800) were synthesized to use as an advanced self-supported bifunctional oxygen electrocatalyst. Consequently, Co-LCFs-800 shows a half-wave potential of 0.834 V in ORR and an overpotential of 354 mV at 10 mA cm<sup>-2</sup> in OER. The Co-LCFs-800-based liquid ZABs afford an admirable performance with a large specific capacity of 780.8 mAh g<sup>-1</sup>, and the Co-LCFs-800-based solid-state ZABs exhibit satisfactory mechanical flexibility and cycling stability. The results suggest that the integration of hetero-nanoparticles into carbon nanofibers holds promise for oxygen cathode in ZABs.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"934-945"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jian Tang, Geng Gao, Jun Fang, Yusong Yang, Junxian Hu, Bin Yang, Yaochun Yao
{"title":"Synergistic core-shell boosts P-CoNiMoO@Co<sub>2</sub>P-Ni<sub>2</sub>P bifunctional catalyst for efficient and robust overall water splitting.","authors":"Jian Tang, Geng Gao, Jun Fang, Yusong Yang, Junxian Hu, Bin Yang, Yaochun Yao","doi":"10.1016/j.jcis.2024.12.005","DOIUrl":"10.1016/j.jcis.2024.12.005","url":null,"abstract":"<p><p>Optimizing hydrogen adsorption and enhancing water absorption are essential for the design of effective hydrogen evolution reaction (HER) electrocatalysts. Herein, a well-defined core-shell-structured P-CoNiMoO@Co<sub>2</sub>P-Ni<sub>2</sub>P catalyst was synthesized on nickel foam via high-temperature phosphidation of heterostructured precursor CoMoO<sub>4</sub>·xH<sub>2</sub>O/NiMoO<sub>4</sub>·xH<sub>2</sub>O with hydrogen (H<sub>2</sub>) assistance. This catalyst exhibits good HER performance, requiring only 24 mV of overpotential to achieve a current density of 10 mA cm<sup>-2</sup>, and long-term stability, maintaining a current density of 100 mA cm<sup>-2</sup> for over 100 h. Density functional theory calculations indicate that the molybdenum site is highly favorable for water adsorption in phosphorus-doped cobalt nickel molybdate (P-CoNiMoO), while the trigonal Ni<sub>3</sub> site is optimal for hydrogen adsorption. These findings indicate that the cooperative interactions and functional division between the core and shell substantially enhance HER performance. In addition, P-CoNiMoO@Co<sub>2</sub>P-Ni<sub>2</sub>P demonstrates high oxygen evolution reaction performance, achieving a current density of 10 mA cm<sup>-2</sup> at an overpotential of 243 mV. When functioning as a bifunctional electrocatalyst, it requires only 1.49 V to drive overall water splitting at a current density of 10 mA cm<sup>-2</sup>, with a durability of over 200 h at current densities of 100 and 300 mA cm<sup>-2</sup>. This study provides significant insights into the development of HER catalysts with potential applications in other fields.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"971-982"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"ZIF-67 nanocubes assembly-derived CoTe<sub>2</sub> nanoparticles encapsulated hierarchical carbon nanofibers enables efficient lithium storage.","authors":"Wu-Di Zhang, Xiao-Ye Ge, Kang-Kang Zhao, Qiang Zhang, Fu-Hu Cao, Xingyu Guo, Chuan-Ling Zhang","doi":"10.1016/j.jcis.2024.12.040","DOIUrl":"10.1016/j.jcis.2024.12.040","url":null,"abstract":"<p><p>Tellurides are promising anode materials for lithium-ion batteries (LIBs) because of their high electronic conductivity and energy density. However, the slow kinetics and poor structural stability lead to decreased electrochemical performance. In this work, by utilizing the interface magnetization mechanism and assembly effect, high-performance CoTe<sub>2</sub> nanoparticles encapsulated hierarchical N-doped porous carbon nanofibers were rationally designed and prepared (ES-CoTe<sub>2</sub>@NC) via facile tellurization of one-dimensional (1D) ZIF-67 nanocube assemblies. Benefiting from the synergistic effects of the unique structure and component, the ES-CoTe<sub>2</sub>@NC anode exhibits a high reversible capacity of 1020 mAh/g at 0.1 A/g after 200 cycles, along with excellent long-term cycling stability, retaining a capacity of 780 mAh/g at 1 A g<sup>-1</sup> after 500 cycles. Notably, the ES-CoTe<sub>2</sub>@NC anode retains a remarkable capacity of 502 mAh/g even after 1000 cycles at a high current density of 5 A g<sup>-1</sup>, highlighting its exceptional cycling stability. Besides, the Full cell coupled with LiFePO<sub>4</sub> cathode delivers a high reversible capacity of 151.1 mAh g<sup>-1</sup> at 0.1 A g<sup>-1</sup> with stable cycling performance. The kinetics analysis reveals that the ES-CoTe<sub>2</sub>@NC anode has high pseudocapacitive properties, high electronic conductivity, and fast Li<sup>+</sup> diffusion capability. Moreover, the ex-situ characterization clarifies the conversion reaction mechanism of ES-CoTe<sub>2</sub>@NC. This work provides a facile but effective way to construct high-performance CoTe<sub>2</sub>-based electrodes.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"1028-1039"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nafise Taheri, Hadis Hashemi, Elham Soroush, Parsa Afsahi, Bahram Ramezanzadeh
{"title":"Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene/MoS<sub>2</sub> hybrid nanocomposites for synergistic smart corrosion protection of epoxy coatings.","authors":"Nafise Taheri, Hadis Hashemi, Elham Soroush, Parsa Afsahi, Bahram Ramezanzadeh","doi":"10.1016/j.jcis.2024.11.205","DOIUrl":"10.1016/j.jcis.2024.11.205","url":null,"abstract":"<p><p>MXene nanosheets have recently become a focus of research for corrosion protection due to their two-dimensional, sheet-like structure and distinct physicochemical characteristics. Nevertheless, their susceptibility to restacking and oxidation restricts their practical applications. To address this, the study proposes a custom hybrid structure by growing molybdenum disulfide (MoS<sub>2</sub>) nanoparticles on the Ti<sub>3</sub>C<sub>2</sub> MXene nanosheets (MX/MS) to prevent oxidation and restacking. This innovative structural design is essential for corrosion-protective coatings, as the sheet-like configuration enhances the barrier properties. The manufacturing of the MX/MS nanoparticles was verified by their characterization employing field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The barrier properties and self-healing functions of the nanoparticle-filled epoxy coatings were evaluated using electrochemical impedance spectroscopy (EIS) and salt spray tests. The epoxy resin including 0.5 wt% MX/MS nanoparticles exhibited outstanding corrosion resistance, with an impedance value (|Z|<sub>0.01Hz</sub>) of 23.77 GΩ.cm<sup>2</sup> after 70 days of immersion. After 48 h of immersion, the coatings also showed a high impedance value (log|Z|<sub>0.01Hz</sub> = 4.24) and excellent self-healing capabilities in the scratched areas. Additionally, after 42 days, the filled nanohybrid coatings showed the least amount of rust and corrosion product according to salt spray analysis. The results of cathodic delamination and pull-off tests indicated that in comparison to the neat epoxy (11 mm and 70 %), the filled coatings containing the synthesized nanofiller had the lowest cathodic delamination radius (1.7 mm) and lowest adhesion loss (46 %). This study highlights the effectiveness of Ti<sub>3</sub>C<sub>2</sub>/MoS<sub>2</sub> hybrid in enhancing the anticorrosive performance of organic coatings, offering a novel approach for designing high-performance additives with promising applications in various fields requiring corrosion protection.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"894-914"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhancement of the urea oxidation reaction by constructing hierarchical CoFe-PBA@S/NiFe-LDH nanoboxes with strengthened built-in electric fields.","authors":"Zhuorun Wu, Huan Hu, Huimin Zhang, Anqi Huang, Xuehui Gao, Zhongwei Chen","doi":"10.1016/j.jcis.2024.11.220","DOIUrl":"10.1016/j.jcis.2024.11.220","url":null,"abstract":"<p><p>The slow kinetics of the oxygen evolution reaction (OER) present a major obstacle for efficient hydrogen production via water electrolysis. In contrast, the urea oxidation reaction (UOR), with its lower thermodynamic barrier, presents a promising alternative to OER. In this study, we designed and synthesized hierarchical CoFe- PBA@S/NiFe-LDH nanoboxes. Sulfur doping in nickel-iron layered double hydroxides (S/NiFe-LDH) introduces a weak built-in electric field (BIEF), which is further strengthened when combined with cobalt-iron Prussian blue analogue (CoFe-PBA) to form a heterojunction. This heterojunction created localized charge polarization at the interface, facilitating efficient electron transfer and reducing the adsorption energy of reaction intermediates, thereby significantly improving intrinsic catalytic activity. Under conditions of 1 M KOH and 0.33 M urea, the CoFe-PBA@S/NiFe-LDH catalyst achieved a current density of 50 mA cm<sup>-2</sup> at a relatively low potential of 1.321 V, accompanied by a low Tafel slope (53 mV dec<sup>-1</sup>). Additionally, it maintained stability at 30 mA cm<sup>-2</sup> for 40 h. This work provides vital insights for the strategic design of highly effective heterojunction catalysts for the UOR.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"324-331"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142765031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of a Dual-Phase TiN-WN electrochemical sensor for H<sub>2</sub>S detection.","authors":"Zhaorui Zhang, Jing Yang, Chonghui Zhu, Mengmeng Xu, Xiaohui Yan, Jinkui Chu, Xinjiang Zhu, Minghui Yang","doi":"10.1016/j.jcis.2024.11.228","DOIUrl":"10.1016/j.jcis.2024.11.228","url":null,"abstract":"<p><p>Electrode materials are pivotal in fuel cell-based gas sensors, yet conventional Pt-based catalysts often suffer from limitations in electronic structure and stability, restricting the practical application of H<sub>2</sub>S detection. Here, we introduce a Pt catalyst supported by a titanium-tungsten nitride (TiN-WN) composite for an electrochemical H<sub>2</sub>S sensor. Leveraging the multilevel electron transfer of the Pt/TiN-WN composite, this sensor achieves electron accumulation on the Pt surface, yielding enhanced conductivity and abundant active sites for high H<sub>2</sub>S sensitivity. It achieves a response current of 12.2 µA, 1.7 times that of Pt/C (7.1 µA), and demonstrates excellent linearity (R<sup>2</sup> = 0.999), stability over repeated tests, and robust anti-interference capability. These findings mark a significant advancement in H<sub>2</sub>S sensing, offering a reliable solution for real-time monitoring and addressing key limitations of current systems.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"332-339"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142765083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuan Lin, Ying Wang, Ziying Feng, Yunyun Gui, Lijun Liu
{"title":"In situ engineered Ce<sub>2</sub>O<sub>2</sub>S/CeO<sub>2</sub> nanofibrous heterojunctions for photocatalytic H<sub>2</sub>O<sub>2</sub> synthesis via S-scheme charge separation.","authors":"Yuan Lin, Ying Wang, Ziying Feng, Yunyun Gui, Lijun Liu","doi":"10.1016/j.jcis.2024.11.232","DOIUrl":"10.1016/j.jcis.2024.11.232","url":null,"abstract":"<p><p>Photocatalytic H<sub>2</sub>O<sub>2</sub> synthesis offers an efficient and sustainable means to convert solar energy into chemical energy, representing a forefront and focal point in photocatalysis. S-scheme heterojunctions demonstrate the capability to effectively separate photogenerated electrons and holes while possessing strong oxidation and reduction abilities, rendering them potential catalysts for photocatalytic H<sub>2</sub>O<sub>2</sub> synthesis. However, designing S-scheme heterojunction photocatalysts with band alignment and close contact remains challenging. Here we report Ce<sub>2</sub>O<sub>2</sub>S/CeO<sub>2</sub> multiphase nanofibrous prepared via an in situ sulphuration/de-sulphuration strategy. This in situ process enables intimate contact between the two phases, thereby shortening the charge transfer distance and promoting charge separation. The interfacial electronic interaction and charge separation were investigated using in situ X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations. The work function difference enables Ce<sub>2</sub>O<sub>2</sub>S to donate electrons to CeO<sub>2</sub> upon combination, resulting in the formation of an internal electric field (IEF) at interfaces. This IEF, along with bent energy bands, facilitates the separation and transfer of photogenerated charge carriers via an S-scheme pathway across the Ce<sub>2</sub>O<sub>2</sub>S/CeO<sub>2</sub> interfaces. The Ce<sub>2</sub>O<sub>2</sub>S as the reduction photocatalyst exhibits significant O<sub>2</sub> adsorption and activation along with a low energy barrier for the H<sub>2</sub>O<sub>2</sub> production. The optimal Ce<sub>2</sub>O<sub>2</sub>S/CeO<sub>2</sub> nanofibers heterojunction demonstrate enhanced photocatalytic H<sub>2</sub>O<sub>2</sub> production of 2.91 mmol g<sup>-1</sup>h<sup>-1</sup>, 58 times higher than that of pristine CeO<sub>2</sub> nanofibers. This investigation provides valuable insights for the rational design and preparation of intimate contact nanofibrous heterojunctions with efficient solar H<sub>2</sub>O<sub>2</sub> synthesis.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"381-391"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}