Reaction Kinetics, Mechanisms and Catalysis最新文献_第9页

Synthesis and application of copper(II) dipyridyl chloride metal organic framework in the photodegradation of reactive blue dye and disinfection of Escherichia coli and Staphylococcus aureus 二吡啶氯化铜金属有机骨架的合成及其在活性蓝染料光降解和大肠杆菌、金黄色葡萄球菌消毒中的应用

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-25 DOI: 10.1007/s11144-025-02838-8

Zeinab A. Suliman, Alsadiq A. Ibrahim, Lagat P. Kipkemboi, Achisa C. Mecha, Martha N. Chollom

{"title":"Synthesis and application of copper(II) dipyridyl chloride metal organic framework in the photodegradation of reactive blue dye and disinfection of Escherichia coli and Staphylococcus aureus","authors":"Zeinab A. Suliman, Alsadiq A. Ibrahim, Lagat P. Kipkemboi, Achisa C. Mecha, Martha N. Chollom","doi":"10.1007/s11144-025-02838-8","DOIUrl":"10.1007/s11144-025-02838-8","url":null,"abstract":"<div>In this study, the metal-organic framework (MOF) [Cu (4,4′-bipy)Cl]n was synthesized via a hydrothermal method using 4,4′-bipyridine as a ligand. The material was characterized through scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and elemental and structural analyses. The effect of initial pollutant concentration, photocatalyst mass, and solution pH were assessed. The reaction kinetics and stability of the MOF was evaluated over five reuse cycles. The disinfection performance was evaluated using disk diffusion method and bacteria in suspension test against E. coli and S. aureus. The Cu-MOF exhibited remarkable photocatalytic efficiency, achieving 93.7% degradation of reactive blue dye under natural sunlight and the optimal conditions included a dye concentration of 0.4 mg/l, 0.45 g of catalyst, and a pH of 10. The photodegradation process followed first order kinetics with a rate constant (k) of 0.076 min−1. The control study showed reduction of the degradation to 30% in the dark due to adsorption and there was no change in dye concentration due to photolysis alone. The MOF maintained stable activity over five consecutive usage cycles, with minimal performance reduction, highlighting its durability. The Cu-MOF displayed significant antibacterial activity, producing inhibition zones of 21 and 23 mm against E. coli and S. aureus, respectively, for initial bacterial concentration of 1.2 × 105 CFU/ml; with 99.99 and 99.999% reduction for E. coli and S. aureus, respectively. The Cu-MOF photocatalyst effectively degraded the pollutants under visible light and maintained good stability and durability; hence it is a promising photocatalyst for water and wastewater purification.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2461 - 2477"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144924","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}

引用次数: 0

CO2 concentration effects on magnesite thermal decomposition kinetics and calcination CO2浓度对菱镁矿热分解动力学及煅烧的影响

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-25 DOI: 10.1007/s11144-025-02837-9

Ze Gong, Dexi Wang, Xueyi Ma, LiHua Fan, Jiazhi Li, Dajing Liu

{"title":"CO2 concentration effects on magnesite thermal decomposition kinetics and calcination","authors":"Ze Gong, Dexi Wang, Xueyi Ma, LiHua Fan, Jiazhi Li, Dajing Liu","doi":"10.1007/s11144-025-02837-9","DOIUrl":"10.1007/s11144-025-02837-9","url":null,"abstract":"<div>This study investigated the effects of different CO₂ concentrations (0%, 20%, 50%, 80%, and 100%) on the decomposition behavior and kinetic mechanisms of magnesite by adjusting the CO₂ concentration in the intake zone of the TG furnace and employing a non-isothermal thermogravimetric analysis method. The thermodynamic parameters and reaction mechanism functions were analyzed using the Flynn–Wall–Ozawa equation and the Coats-Redfern equation. The results indicated that as the heating rate increased, the thermogravimetric (TG) curve shifted toward higher temperatures. Under the same heating rate, an increase in CO₂ concentration significantly inhibited the decomposition of magnesite. Additionally, the initial decomposition temperature, the temperature corresponding to the optimal production rate, and the activation energy all increased with the rise in CO₂ concentration. The evolution of the dominant mechanism was influenced by CO₂ concentration through changes in diffusion resistance and surface reaction steps. At low CO₂ concentrations (< 50%), the decomposition followed a nucleation and growth model, whereas at high concentrations (> 80%), it transitioned to a three-dimensional diffusion model. In industrial calcination, the calcination temperature can be optimized based on CO₂ concentration; however, it is essential to balance the thermodynamic driving force and the risk of the reverse reaction. After calcination, CO₂ should be rapidly removed to prevent the recarbonation of MgO. This study reveals the synergistic regulatory mechanism of CO₂ concentration on the decomposition kinetics and thermodynamics of magnesite, providing a theoretical foundation for optimizing the calcination process and equipment design.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2117 - 2136"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11144-025-02837-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyurethane blends with nitrocellulose/nitroglycerin: exploring thermal properties for advanced propellant formulations 聚氨酯与硝化纤维素/硝化甘油共混物：探索先进推进剂配方的热性能

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-22 DOI: 10.1007/s11144-025-02833-z

Manel Nourine, Moulai Karim Boulkadid, Sabri Touidjine, Samir Belkhiri, Djamal Belmehdi

{"title":"Polyurethane blends with nitrocellulose/nitroglycerin: exploring thermal properties for advanced propellant formulations","authors":"Manel Nourine, Moulai Karim Boulkadid, Sabri Touidjine, Samir Belkhiri, Djamal Belmehdi","doi":"10.1007/s11144-025-02833-z","DOIUrl":"10.1007/s11144-025-02833-z","url":null,"abstract":"<div>This study concerns an in-depth analysis of the features of polyurethane mixed with double base noted DB (nitrocellulose/nitroglycerin) as a high-energy component. In this context, polymer blends of polyurethane/DB were prepared at various mass ratios, employing hydroxyl-terminated polyester prepolymer (Desmophen®1200) doped with nitrocellulose/nitroglycerin mixture. The formulated PU/DB blends were analyzed through Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Moreover, the prepared samples underwent thorough thermal analysis using thermogravimetric (TG) and differential scanning calorimetry (DSC) techniques. To delve deeper into the thermal decomposition of the formulated compositions and determine related kinetic parameters, isoconversional kinetic methods such as it-KAS, it-FWO, and VYA/CE were employed. The results indicate that incorporating DB into the PU binder positively affects the PU's characteristics. This includes an increase in energy release and a catalyzed thermal decomposition process.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2083 - 2099"},"PeriodicalIF":1.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144698","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}

引用次数: 0

The 3rd International Conference on Reaction Kinetics, Mechanisms and Catalysis 第三届国际反应动力学、机理和催化会议

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-20 DOI: 10.1007/s11144-025-02835-x

Gábor Lente

引用次数: 0

Enhanced photoelectrocatalytic degradation of methylene blue using TiO2/silver nanowires composites TiO2/银纳米线复合材料增强亚甲基蓝的光电催化降解

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-19 DOI: 10.1007/s11144-025-02832-0

Yung-Hsiang Hsu, Shoaib Siddique, Bo-Tau Liu

{"title":"Enhanced photoelectrocatalytic degradation of methylene blue using TiO2/silver nanowires composites","authors":"Yung-Hsiang Hsu, Shoaib Siddique, Bo-Tau Liu","doi":"10.1007/s11144-025-02832-0","DOIUrl":"10.1007/s11144-025-02832-0","url":null,"abstract":"<div>Silver nanowires (AgNWs) were synthesized using the polyol method and utilized to fabricate transparent conductive films. A bilayer TiO2/AgNWs structure was employed for the photoelectrocatalytic degradation of methylene blue (MB). While TiO2 photocatalysis for MB degradation did not suffer from overpotential issues, applying a bias voltage significantly enhanced catalytic activity. Compared to ITO conductors, AgNWs demonstrated superior photoelectrocatalytic performance, likely due to their increased interfacial contact and rapid charge transport within the TiO2 matrix, effectively suppressing electron–hole recombination. The application of an external voltage further improved catalytic efficiency by promoting charge separation and generating additional hydroxyl radicals. The active surface area and sheet resistance were influenced by the thickness of the TiO2 layer, impacting electron transport and charge recombination rates. MB degradation under anodic conditions was more efficient than under cathodic conditions, as the anodic electrode effectively extracted excited electrons, enhancing charge separation. Although bias voltage improved the catalytic activity of TiO2/AgNWs catalysts, it did not change the reaction order and the ratio of residual carbon.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2449 - 2460"},"PeriodicalIF":1.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144499","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}

引用次数: 0

Efficient hexavalent chromium reduction via non-metallic composite photocatalysts: insights into g-C3N4, carbon quantum dots, and graphene aerogel synergy 通过非金属复合光催化剂有效还原六价铬：洞察g-C3N4，碳量子点和石墨烯气凝胶协同作用

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-16 DOI: 10.1007/s11144-025-02826-y

Hong-Kai Jheng, Hong-Kai Li, Po-Jen Tseng, Chao-Yin Kuo

{"title":"Efficient hexavalent chromium reduction via non-metallic composite photocatalysts: insights into g-C3N4, carbon quantum dots, and graphene aerogel synergy","authors":"Hong-Kai Jheng, Hong-Kai Li, Po-Jen Tseng, Chao-Yin Kuo","doi":"10.1007/s11144-025-02826-y","DOIUrl":"10.1007/s11144-025-02826-y","url":null,"abstract":"<div>In this study, a non-metallic composite photocatalyst was synthesized using nanomaterial carbon quantum dots (C dots) combined with graphitic carbon nitride (g-C3N4) and graphene aerogel (GA). The composite catalysts effectively reduced the energy gap and enhanced the utilization of visible light by ultraviolet–visible spectrometer. From fluorescence spectrum analysis, the result revealed that C dots, when irradiated with 340 nm excitation light, emitted fluorescence at 460 nm. Using dynamic light scattering analyses, the results confirmed that the C dots had a size range of approximately 3–8 nm, indicating successful preparation and purification processes. Using the Taguchi method, the optimal synthesis conditions for the composite photocatalysts were determined to be a temperature of 160 °C, a preparation time of 8 h, 15 mL of C dots, and a graphene oxide to g-C3N4 weight ratio of 1:1. Under these above conditions, the composite photocatalyst completely reduced Cr(VI) in water under UV light within 60 min, demonstrating high photocatalytic efficiency. The stability and reusability of the catalyst were confirmed through cycling tests, which showed maintained effectiveness after five cycles. Biological toxicity tests using Daphnia magna, the results indicated that the highly toxic Cr(VI) was rendered non-toxic after treatment with the composite photocatalyst. These results confirm that the g-C3N4/C dots/GA photocatalyst was successfully synthesized and is capable of reducing aqueous hexavalent chromium, thus achieving the goal of reducing pollutant toxicity.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2101 - 2116"},"PeriodicalIF":1.7,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143627","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}

引用次数: 0

Kinetics and thermodynamics study on thiamethoxam adsorption onto TiO2 and perlite supported TiO2 噻虫胺吸附TiO2及珍珠岩负载TiO2的动力学和热力学研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-15 DOI: 10.1007/s11144-025-02827-x

Emmanuel Ngaha, Dilek Duranoğlu

{"title":"Kinetics and thermodynamics study on thiamethoxam adsorption onto TiO2 and perlite supported TiO2","authors":"Emmanuel Ngaha, Dilek Duranoğlu","doi":"10.1007/s11144-025-02827-x","DOIUrl":"10.1007/s11144-025-02827-x","url":null,"abstract":"<div>Adsorption of thiamethoxam onto TiO2 and perlite supported TiO2 composite (PST) was investigated at different contact time and temperature (295 and 318 K). Adsorption kinetic was evaluated by using the Lindstrom adsorption model to obtain the rate constants of adsorption (k1) and desorption (k2) simultaneously. Thermodynamic parameters of adsorption like activation energy (∆Ea), Gibbs free energy (∆Ga), enthalpy (∆Ha), and entropy (∆Sa) were also calculated. The adsorption progressively increased with the contact time until equilibrium was achieved, except with PST (295 K), where almost 81% of the THX was eliminated during the initial 10 min. Equilibrium was reached after 35 min for TiO2 and PST at any temperatures. The endothermic nature of the adsorption reaction of THX onto TiO2 and PST has been highlighted. The modeling of the adsorption process allowed us to obtain the theoretical expression of THX adsorbed fraction (φ(t)) and then the adsorption (k1) and desorption (k1) rate constant. Adsorption was faster than desorption and spontaneously occurred, unlike desorption, which was non-spontaneous.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2613 - 2626"},"PeriodicalIF":1.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143811","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}

引用次数: 0

Synthesis of brønsted and lewis acidic solid catalyst for glucose conversion into 5-hydroxymethylfurfural brønsted和lewis酸性固体催化剂的合成葡萄糖转化为5-羟甲基糠醛

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-10 DOI: 10.1007/s11144-025-02812-4

Peng Yu, Rui Zhang

{"title":"Synthesis of brønsted and lewis acidic solid catalyst for glucose conversion into 5-hydroxymethylfurfural","authors":"Peng Yu, Rui Zhang","doi":"10.1007/s11144-025-02812-4","DOIUrl":"10.1007/s11144-025-02812-4","url":null,"abstract":"<div>Solid acid catalysts containing both Brønsted acidic and Lewis acidic sites were hydrothermally prepared in this work to convert glucose into 5-hydroxymethylfurfural (5-HMF). A series of catalysts was synthesized by combining metal salts (CuSO4, ZrOCl2, Al2(SO4)3, Co (NO3)2) with 2,4,6-trimethylbenzene-1,3,5-trimethylphosphonic acid (H6L) as a ligand in a hydrothermal reaction. Additionally, either 2,2-bipyridyl or 4,4-bipyridyl was added as an auxiliary ligand to adjust the internal structure and enhance the Brønsted acid strength of the catalyst, resulting in solid acid catalysts with varying Lewis acid site content. Catalyst characterization demonstrated that 4,4-bipyridine was more effective in enhancing Brønsted acid strength compared to 2,2-bipyridine. Glucose dehydration was performed to synthesize 5-HMF in a two-phase reaction solvent composed of saturated brine, sec-butanol, and methyl isobutyl ketone (1:1.6:4 ratio) at 463 K. The experiments results indicated that the CoL4 catalyst achieved a conversion yield of 89.1% and exhibited excellent thermal stability. The present study emphasizes the comparison and selection of bipotent acid solid catalysts containing different metal active sites for light use in the dehydration of glucose to 5-HMF.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1569 - 1582"},"PeriodicalIF":1.7,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135370","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}

引用次数: 0

Theoretical screening of SnO2-based single-atom catalysts for CO oxidation reaction CO氧化反应中sno2基单原子催化剂的理论筛选

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-10 DOI: 10.1007/s11144-025-02830-2

Wei Tan, Xuandong Li, Xin Li

引用次数: 0

Study of the physicochemical properties of specialty carbon black and its catalytic performance for the pyrolysis of ammonium perchlorate 特种炭黑的理化性质及其对高氯酸铵热解的催化性能研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-03-08 DOI: 10.1007/s11144-025-02829-9

Wenjie Shao, Shuai Zhang, Liye Yang, Qiang Ling, Ziguo He, Ping Cui

{"title":"Study of the physicochemical properties of specialty carbon black and its catalytic performance for the pyrolysis of ammonium perchlorate","authors":"Wenjie Shao, Shuai Zhang, Liye Yang, Qiang Ling, Ziguo He, Ping Cui","doi":"10.1007/s11144-025-02829-9","DOIUrl":"10.1007/s11144-025-02829-9","url":null,"abstract":"<div>This work aims at investigating the structure–activity relationship between the physicochemical properties of nine types of carbon black (CB) with a particle size range of 1–15 μm and a mass fraction of 5%, including oil absorption value, compression oil absorption value, and oxygen content, and the catalytic pyrolysis of ammonium perchlorate (AP), concluding that the function relationship between oil absorption value and high-temperature peak is Y1 = 1032.67 − 9.618x + 0.038x2, the function relationship between compression oil absorption value and high-temperature peak is Y2 = 145.537 + 62.365 ln(x), and the function relationship between oxygen content and high-temperature peak is Y3 = e(6.085−0.02/x). Based on these, we further use coal tar, which is abundant in sources, as the raw material to prepare five types of coal-based CB marked as CB1–CB5 at pyrolysis temperatures of 1000 ~ 1800 °C. The relative error between the actual peak value and the predicted value of the CB/AP composite particles is less than 5%, proving that the peak temperature model of CB/AP composite particles can guide actual production. This study contributes to the promotion of CB applications in improving the catalytic pyrolysis performance of ammonium perchlorate and enhancing the high added value utilization of coal-derived products.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 4","pages":"2063 - 2082"},"PeriodicalIF":1.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142766","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}

引用次数: 0