Reaction Kinetics, Mechanisms and Catalysis最新文献

{"title":"Wet peroxide oxidation of catechol over copper-based catalysts: inorganic ions effect and degradation pathway of organics","authors":"Wumin Zhang,&nbsp;Qing Li,&nbsp;Yu Guo,&nbsp;Yanjun Ren,&nbsp;Yao Zhang,&nbsp;Yanyan Xi,&nbsp;Xufeng Lin","doi":"10.1007/s11144-024-02786-9","DOIUrl":"10.1007/s11144-024-02786-9","url":null,"abstract":"<div><p>In this study, Cu/Al₂O₃ catalysts were prepared by equal volume wet impregnation for catalytic wet peroxide oxidation (CWPO) of catechol. The crystal structure and elemental composition of the catalysts were investigated by characterization tools like XRD and XPS. The CWPO performance of the catalyst was evaluated through catalytic degradation of catechol in aqueous solution. It was found that 5%Cu/Al2O3 (in wt%) catalyst showed an excellent catalytic performance for catechol degradation. The total organic carbon (TOC) removal rates reached 91% under optimized reaction conditions. Moreover, anions and cations both had an inhibition effect on TOC removal rates. Combined with hydroxyl radical quenching experiments and density functional theory (DFT) study, the catalytic degradation mechanism was proposed to illustrate the degradation pathway of catechol. The catalytic test results as well as the proposed mechanism can provide an insight into studying the degradation pathway of organics in CWPO.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 2","pages":"753 - 771"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on denitrification performance and mechanism of (Ce, La)PO4 under different calcination conditions","authors":"Na Li,&nbsp;Jingqi Li,&nbsp;Ting Wang,&nbsp;Xinyu Li,&nbsp;Ruifang Wang,&nbsp;Zhiyu Zhang","doi":"10.1007/s11144-024-02782-z","DOIUrl":"10.1007/s11144-024-02782-z","url":null,"abstract":"<div><p>The (Ce, La)PO₄ catalyst was synthesized utilizing the hydrothermal method. Calcination, a crucial step in catalyst preparation, was performed under four distinct conditions: muffle, microwave, N₂, and O₂ atmospheres. This study examined the impact of these calcination conditions on the Selective Catalytic Reduction (SCR) activity, as well as the physical and chemical properties of the (Ce, La)PO₄ catalysts. The microwave calcination condition was found to decrease the crystallinity of the samples and enhance the dispersion of active material on the catalyst surface compared to the other methods. Based on the results of Brunauer–Emmett–Teller (BET) and NH₃-Temperature Programmed Desorption (NH₃-TPD) analyses, microwave calcination not only increased the specific surface area of the samples but also revealed more acidic sites on the catalyst surface, thereby improving the adsorption–desorption performance for NH₃. Furthermore, microwave calcination enhanced the redox performance of the catalyst and consequently improved the NO_<i>x</i> conversion efficiency. In-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analysis suggested that the Selective Catalytic Reduction on the (Ce, La)PO₄ catalyst surface followed both the Langmuir–Hinshelwood and Eley–Rideal mechanisms. A comparative analysis of the effects of different calcination conditions on catalyst performance revealed that microwave calcination was the most effective in enhancing catalyst performance. This finding provides valuable guidance for catalyst synthesis.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1393 - 1407"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalytic degradation performance of the novel ZnMoO4/Bi2S3 composite material for ciprofloxacin","authors":"Jianming Liu,&nbsp;Jingwen Xue,&nbsp;Xinyue Zhang,&nbsp;Jianzhu Zhang,&nbsp;Kun Tang,&nbsp;Lin Deng","doi":"10.1007/s11144-024-02780-1","DOIUrl":"10.1007/s11144-024-02780-1","url":null,"abstract":"<div><p>This article reports the successful synthesis of a novel photocatalytic composite material, ZnMoO₄/Bi₂S_3, using a hydrothermal method. The optimal 15% ZnMoO₄/Bi₂S₃ was highly efficient for antibiotic ciprofloxacin (CIP) decomposition under UV light illumination, which was much more remarkable than the pristine ZnMoO₄ and Bi₂S₃, respectively. The results revealed that the introduction of ZnMoO₄ on the surface of Bi₂S₃ could broaden the light absorption range and boost the separation of photoinduced charge carriers to promote photocatalysis efficiency. In addition, the factors influencing the initial pH, catalyst dosage, CIP concentration, and various co-existing factors on the CIP degradation removal performance of 15% ZnMoO₄/Bi₂S₃ were investigated. After four runs of adsorption–photodegradation towards CIP, 15% ZnMoO₄/Bi₂S₃ still exhibited superior reduction activity and reusability. A possible photodegradation mechanism of degradation of CIP over 15% ZnMoO₄/Bi₂S₃ was proposed and clarified through the electrochemical tests, XPS determination and active species trapping experiments. This study not only prepared an efficient photocatalyst but also further demonstrated the effectiveness of photocatalytic technology in antibiotic wastewater treatment.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1637 - 1651"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photocatalytic treatment of oilfield wastewater using TiO2/MoS2 nanocomposites prepared via sol–gel and hydrothermal methods","authors":"Jianing He,&nbsp;Zhiyong Hu,&nbsp;Xinqi Zhu,&nbsp;Zhihua Liu","doi":"10.1007/s11144-024-02779-8","DOIUrl":"10.1007/s11144-024-02779-8","url":null,"abstract":"<div><p>In this study, TiO₂, MoS₂ and TiO₂/MoS₂ nanomaterials were successfully synthesized by sol–gel method and hydrothermal method using butyl titanate and ammonium molybdate as precursors. In the experiment of photocatalytic degradation of oilfield wastewater, the effects of catalyst dosage, initial pH value, reaction time and other key factors on the photocatalytic activity were systematically investigated. The results show that under the conditions that the capacity of wastewater treatment reaction system is 200 mL, the dosage of TiO₂ and TiO₂/MoS₂ are both 0.8 g, the initial pH value is between 3 and 4, and the reaction time is 40 min, the removal rates of oil and suspended matter in oilfield wastewater by TiO₂/MoS₂ can reach 79.4% and 92.7%. This significant improvement is likely due to the synergistic effect of TiO₂/MoS₂ composites, where the presence of MoS₂ helps to improve light absorption and electron transport efficiency, thereby enhancing photocatalytic performance. The detailed mechanisms in this regard will be further elaborated in subsequent discussions. The innovation of this study lies in the successful synthesis of TiO₂/MoS₂ composites, and the systematic exploration of its high efficiency and influencing factors in the photocatalytic treatment of oilfield wastewater.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 2","pages":"1153 - 1174"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photo-decomposition of methylene blue and toluene with (Ag,Na)-TiO2/Sr4All4O25:Eu,Dy heterojunction photocatalyst synthesized by coprecipitation method","authors":"Hyun-sung Kang,&nbsp;Bumrae Cho,&nbsp;Jung-Sik Kim","doi":"10.1007/s11144-024-02783-y","DOIUrl":"10.1007/s11144-024-02783-y","url":null,"abstract":"<div><p>The TiO₂/Sr₄Al₁₄O₂₅: Eu²⁺,Dy³⁺ heterojunction photocatalyst has been prepared by TiO₂ nanoparticles coated on the Sr₄Al₁₄O₂₅:Eu,Dy phosphor substrate using a coprecipitation reaction method. To improve the generation of charge carriers in the photocatalyst, Na and Ag elements were impregnated on TiO₂ nanoparticles by adding NaHCO₃ and AgNO₃, respectively. The (Ag,Na)-impregnated TiO₂/Sr₄Al₁₄O₂₅: Eu²⁺,Dy³⁺ hybrid photocatalyst system was synthesized under various conditions, including different Ag concentrations (0–0.08 M) and heat treatment temperatures (200–500 °C). The photocatalytic performance of (Ag,Na)-impregnated TiO₂/Sr₄Al₁₄O₂₅: Eu²⁺,Dy³⁺ hybrid photocatalysts was analyzed through the photobleaching of methylene blue(MB) dye solution and decomposition of toluene gas. In the hybrid photocatalysts of TiO₂-coated long-lasting phosphors, the phosphor may act as an internal light source toward the acceleration or sustenance of photocatalytic reactivity even in the absence of external light irradiation. The photocatalytic reactivity of (Ag,Na)-TiO₂/Sr₄Al₁₄O₂₅: Eu²⁺,Dy³⁺ hybrid photocatalyst surpassed that of Na-TiO₂/Sr₄Al₁₄O₂₅: Eu²⁺,Dy³⁺ without Ag impregnation. The (0.06 M Ag, Na)-TiO₂/Sr₄Al₁₄O₂₅:Eu²⁺,Dy³⁺ photocatalyst and TiO₂/Sr₄Al₁₄O₂₅: Eu²⁺,Dy³⁺ without Ag impregnation degraded a 10 ppm toluene gas about 65% and 30% in 150 min under visible light, respectively. This superior performance can be primarily ascribed to the synergistic interaction between (Ag,Na) and TiO₂.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 2","pages":"657 - 671"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degradation of basic yellow 28 via Fenton-like oxidation using a copper phosphate-based catalyst","authors":"D. Meziani,&nbsp;Y. Roumila,&nbsp;I. Belkhettab,&nbsp;M. Trari","doi":"10.1007/s11144-024-02784-x","DOIUrl":"10.1007/s11144-024-02784-x","url":null,"abstract":"<div><p>In this study a novel heterogeneous Fenton-like catalyst, copper phosphate material Cu₃(PO₄)₂ with good stability over a wide pH range, was synthetized by sol gel method and characterized by several physicochemical techniques in the aim to eliminate Basic Yellow 28 (BY-28) an organic dye from water. The physicochemical analysis results of the catalyst revealed a high porosity with large specific surface area. Thus contributing to generate ^⋅OH radicals via the activation of hydrogen peroxide (H₂O₂). However, several reaction parameters affecting the catalyst performance such as H₂O₂ concentration, Cu₃(PO₄)₂ dose, initial pH, temperature and BY-28 concentration were investigated. The best dye degradation rates were achieved at the neutral <i>pH</i> with BY-28 dye concentration of 20 mg L⁻¹. The synthesized copper phosphate was successfully reused five times while retaining a removal efficiency of 97% after 50 min. Moreover, other dyes could be found in textile industry wastewater were also eliminated in the optimum condition. These results make the copper phosphate, a prominent catalyst for the organic dye degradation using the Fenton-like process.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1553 - 1567"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, characterization and catalytic application of spinel neodymium doping in Co3O4 nanocatalyst for the conversion of styrene to benzaldehyde","authors":"C. Selvakumar,&nbsp;V. T. Geetha,&nbsp;C. Govindaraju","doi":"10.1007/s11144-024-02776-x","DOIUrl":"10.1007/s11144-024-02776-x","url":null,"abstract":"<div><p>This research investigates the synthesis and catalytic performance of Nd-doped Co₃O₄ nanoparticles for the selective oxidation of styrene to benzaldehyde. The incorporation of Nd³⁺ ions into the Co₃O₄ lattice led to structural modifications. XRD analysis confirmed the formation of a spinel structure with the successful incorporation of Nd³⁺ ions into the Co₃O₄ lattice. SEM and TEM images revealed morphology of compound. UV-DRS analysis showed a blue shift in the band gap with increasing Nd doping. Photoluminescence studies indicated the presence of oxygen vacancies and their reduction with increasing Nd concentration. The catalytic activity of the Nd-doped Co₃O₄ catalysts was evaluated under various reaction conditions. The enhanced catalytic performance was attributed to the synergistic effect of Nd³⁺ doping, which increased the number of active sites and improved the redox properties of the catalyst. This work provides valuable insights into the design and development of efficient catalysts for selective oxidation reactions.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1347 - 1361"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photocatalytic degradation of clofibric acid using ZnO-impregnated Tamarix articulata stems","authors":"Hadj Daoud Bouras,&nbsp;Abdallah Aissa,&nbsp;Intisar Belhadj Aissa,&nbsp;Yasmina Khane,&nbsp;Lidia Favier,&nbsp;Nadir Dizge","doi":"10.1007/s11144-024-02778-9","DOIUrl":"10.1007/s11144-024-02778-9","url":null,"abstract":"<div><p>This study investigates the use of zinc oxide (ZnO) as a semiconductor photocatalyst, applied to <i>Tamarix articulata</i> stems (TA), for the photocatalytic oxidation of clofibric acid (CA). The microstructural properties of the ZnO-impregnated TA samples were examined using scanning electron microscopy (SEM–EDX). Chemical characterization was performed through Fourier Transform Infrared Spectroscopy (FT-IR). The pH dependence of CA degradation was found to be optimal within the pH range of 7 to 9. The study revealed that the maximum degradation efficiency of CA reached 67% at an initial concentration of 2.5 mg/L and 30% at 10 mg/L. The catalyst loading was optimized at 1 g/L. The degradation kinetics adhered to a pseudo-first-order model, with the rate constant being influenced by the catalyst concentration.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1623 - 1636"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinetics and mechanism of sunlight-driven rod-shaped Cu-metal organic framework catalyst with carboxylate double linker for reduction of Cr(VI) and rhodamine B dye degradation","authors":"Sai P. Katke,&nbsp;Jayashree N. Kudalkar,&nbsp;Ekta P. Asiwal,&nbsp;Suresh D. Pawar","doi":"10.1007/s11144-024-02787-8","DOIUrl":"10.1007/s11144-024-02787-8","url":null,"abstract":"<div><p>This study presents a novel rod-shaped copper-based metal organic framework containing carboxylate-based double linkers. The robust coordination between the metal centers and the carboxylate groups fortifies the framework, making it more resistant to thermal and chemical stresses. This enhanced stability plays a crucial role in improving the photocatalytic performance. It has remarkable catalytic efficacy in reduction in toxic chromium hexavalent and degradation in the poisonous dye rhodamine B under natural sunlight. The experimental findings demonstrated a noteworthy conversion of chromium(VI) to chromium(III) through an effective reduction of 83.40% after 70 min and the organic dye rhodamine B is degraded into its mineral component by 98.73% after 60 min. The obtained results highlight the critical role of the copper-metal organic framework in generating reactive oxygen species under sunlight, showcasing its potential for addressing pressing water pollution challenges. Its unique rod-shaped morphology enhances active site exposure and facilitates efficient electron transfer, making it a highly effective material for environmental remediation. This sustainable approach underscores the promise of advanced metal–organic frameworks in delivering impactful solutions for water detoxification and pollution control.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1777 - 1795"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of sulfate ions on adsorption properties of nano-zirconia: a crucial factor in the defluoridation of tap water","authors":"Nesrine Kamoun,&nbsp;Sahar Raissi,&nbsp;Mohamed Kadri Younes,&nbsp;Hamza Elfil","doi":"10.1007/s11144-024-02785-w","DOIUrl":"10.1007/s11144-024-02785-w","url":null,"abstract":"<div><p>In the present investigation, we study the effect of the calcination temperature on the stability of sulfate ions in nano-sulfated zirconia, which play an important role in water defluoridation. Nano-sulfated zirconia adsorbents were developed for fluoride uptake from water. It showed excellent efficiency for Tunisian tap water treatment. This performance is due to the particular synthesis process using sol–gel approach in one- pot coupled to supercritical drying. The morphology and structure of the prepared materials were examined using N₂ physisorption, FTIR spectroscopy, SEM, pH_PZC, XRD, TEM and EDX spectroscopy. Textural properties revealed that all prepared nanoscale materials develop a mesoporous texture, a high porosity, and a large surface area, reaching 340 m² g⁻¹. FTIR spectroscopy and SEM analysis showed the formation of highly functionalized solids with various active sites and numerous cavities. TEM results confirmed the nanocrystalline nature of our solids. The different findings indicated that the functionalization of zirconia produces a particular material’s structure affected by calcination temperature. In the broad pH range of 2–8, the selected nano-sulfated zirconia exhibited a high fluoride removal rate of almost 99% in a shorter equilibrium time of 5 min. Investigations were conducted into the economic value, reusability, and regeneration potential.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"323 - 346"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}