Reaction Kinetics, Mechanisms and Catalysis最新文献

{"title":"Construction of composite drug-loaded nanofiber membranes with tunable porous structure and study of their sustained release mechanism","authors":"Junlang Li,&nbsp;Shaofeng Yin,&nbsp;Lixin Chen,&nbsp;Lei Chen,&nbsp;Yang Chen,&nbsp;TianTian Xie,&nbsp;Yingjie Wang,&nbsp;Xiaoting Deng","doi":"10.1007/s11144-026-03156-3","DOIUrl":"10.1007/s11144-026-03156-3","url":null,"abstract":"<div><p>This study aimed to investigate the regulatory mechanism of spinning solution composition on the structure and drug sustained-release behavior of inorganic–organic drug-loaded nanofiber membranes fabricated via emulsion electrospinning. By adjusting water content (0, 1, 1.5 g) and zeolite loading, nanofiber membranes with different porous structures were prepared. Results indicated that fiber morphology and release kinetics were significantly influenced by the spinning solution composition: Systems containing water (W₁-Zeo@DS NFs, W_1.5-Zeo@DS NFs) formed shallow surface pores due to the emulsion template effect, resulting in finer fiber diameters. The system without water (Zeo@DS NFs) formed deeper internal channels via solvent-induced phase separation, leading to larger fiber diameters. Based on comprehensive release profiles and cumulative release rates, W₁-Zeo@DS NFs demonstrated the optimal sustained-release performance and the highest drug utilization efficiency (56.85%). This study demonstrates that synergistic regulation of water content and zeolite loading can effectively optimize the multi-level pore structure of fibers, enabling precise control over drug release behavior, thereby providing a reference for designing efficient composite sustained-release drug delivery systems.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 5","pages":"3927 - 3940"},"PeriodicalIF":2.1,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099238","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":"Response surface methodology-optimized dye degradation using pectin-polyvinyl alcohol-titanium dioxide hydrogel","authors":"Srividya Rompicherla,&nbsp;Ramesh Naidu Mandapati,&nbsp;Vijetha Ponnam","doi":"10.1007/s11144-026-03152-7","DOIUrl":"10.1007/s11144-026-03152-7","url":null,"abstract":"<div><p>This study reported the synthesis of Pectin- Polyvinyl alcohol (PVA) hydrogels incorporated with Titanium dioxide (TiO₂) Nanoparticles (NPs) and its application towards effective dye degradation in aqueous system. The hybrid system integrates the photocatalytic capabilities of TiO₂ with biocompatibility of pectin while PVA provides the structural ability and better hydrogel network. The incorporation of the TiO₂ NPs was also successfully confirmed by a range of tests, including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Response surface methodology (RSM), (Central Composite Design, CCD) was applied to reach an optimal dye degradation process statistically with four parameters: TiO₂ NPs dosage, degradation time, initial concentration of dye and pH being analyzed. Optimization gave a degradation efficiency of 78.74% for a minimum dosage of 0.754 wt% which proved that incorporating TiO₂ NPs clearly improved the degradation efficiency. Scavenger experiment were performed to understand the ROS of the process and found that hydroxyl radicals were primary ROS, All the prepared hydrogel for dye degradation follows pseudo-first order kinetics and the thermodynamic analysis revealed that the process was more favorable with increase in temperature. Positive ΔH˚representing that energy requirement drives the degradation effectively, and positive ΔS˚ values indicated the disorderness of the process. Reusability experiments confirmed that it is possible to re-use the hydrogel without loss of TiO₂ NPs. Life cycle assessment and Techno economic analysis was initiated for the process to understand the scalability, feasibility and environmental impact of the process adopted.</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":"139 4","pages":"3533 - 3557"},"PeriodicalIF":2.1,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614887","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":"Structure–property correlations in Sm-doped ZnO thin films: impact on optical, thermoelectric, photocatalytic, scavengers test, and gas sensing performance","authors":"Sabrina Roguai","doi":"10.1007/s11144-026-03159-0","DOIUrl":"10.1007/s11144-026-03159-0","url":null,"abstract":"<div><p>Zn_1−<i>x</i>Sm_<i>x</i>O (x = 0, 2, 5, and 10 atom%) thin films were successfully deposited by spray pyrolysis at 450 °C and systematically investigated. XRD analysis confirmed the preservation of the wurtzite structure, with lattice parameters slightly varying around a ≈ 0.3252–0.3256 nm and c ≈ 0.5207–0.5213 nm, while crystallite size ranged from 44 to 55 nm and lattice strain increased up to 0.159%. The incorporation of Sm³⁺ ions into the ZnO lattice induces structural distortion and defect formation, which play a key role in modifying the electronic structure and, consequently, the multifunctional behavior of the films. Optical studies revealed band gap tuning from 3.30 eV (pure ZnO) to 3.22 eV (5% Sm) and 3.26 eV (10% Sm), which is attributed to the combined effects of sp–d exchange interactions and defect-related states introduced by Sm doping. The refractive index decreased from 2.08 to 1.64 (at 599 nm), indicating a reduction in film density and polarizability linked to dopant-induced disorder. Importantly, Sm incorporation significantly enhances the carrier concentration (from 5.73 × 10¹⁷ to 5.34 × 10¹⁸ cm⁻³), which increases the Fermi level position toward the conduction band. This shift explains the observed decrease in the Seebeck coefficient and demonstrates the transition toward degenerate semiconductor behavior. Photocatalytic degradation of methylene blue reached a maximum efficiency of 87% for 2% Sm–ZnO (<i>k</i> = 0.00917 min⁻¹), which can be correlated to an optimal balance between charge carrier generation and recombination rates at moderate doping levels. Similarly, gas sensing and photodetection performances showed optimal response at 2–5% Sm, highlighting that excessive doping may introduce recombination centers that limit performance. Overall, these results demonstrate that controlled Sm incorporation governs the interplay between structural defects, charge transport, and optical properties, thereby enabling the tuning of ZnO thin films for multifunctional applications.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 5","pages":"4053 - 4078"},"PeriodicalIF":2.1,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099181","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 thermodynamics of non-isothermal pyrolysis mechanisms in Cucumis sativus peels","authors":"Qurat ul Ain Abid,&nbsp;Muhammad Azeem Arshad,&nbsp;Farah Kanwal,&nbsp;Khurram Shahzad Munawar","doi":"10.1007/s11144-026-03165-2","DOIUrl":"10.1007/s11144-026-03165-2","url":null,"abstract":"<div><p><i>Cucumis sativus</i> (cucumber) peels were comprehensively studied for thermochemical conversion potential using thermo-kinetic investigation with a focus on multi-step degradation behavior. Proximate and elemental analyses confirmed good pyrolysis characteristics such as high volatile matter (66.70%) and reasonable fixed carbon (24.54%) which made it suitable for bioenergy applications. The TGA showed that there are three regions of degradation: moisture removal, active devolatilization (129–315 °C) and slow degradation of lignin (residual char 23%). One of the novelty aspects of this work is the combination of the generalized linear integral method (GLIM) and Fraser-Suzuki peak deconvolution to resolve overlapping reactions to obtain reliable kinetic parameters. The deconvolution results gave three pseudo-components; hemicellulose (<i>P-HC</i>_<i>l</i>), cellulose (<i>P-C</i>_<i>l</i>) and lignin (<i>P-L</i>_<i>g</i>). Their activation energies were 135 ± 2, 154 ± 3 and 98 ± 2 kJ mol⁻¹. The activation energy for all conversions showed insignificant variations, conforming to single-step kinetics for the individual component. The process models determined by the advanced reaction model determination methodology suggest reaction order model for <i>P</i>-<i>HC</i>_<i>l</i><i>,</i> nucleation-growth for <i>P-C</i>_<i>l</i> and a rather complex diffusion for <i>P-L</i>_<i>g</i>. The thermodynamic analysis showed that lignin degradation is probably the least spontaneous and with relatively ordered transition state. The overall combined GLIM–Fraser–Suzuki approach is more comprehensive in terms of biomass pyrolysis kinetics, gives better/reliable mechanistic understanding of the pyrolysis process, and may lead to a more dependable design and optimization of reactors in the waste-to-energy system.</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":"139 5","pages":"4007 - 4034"},"PeriodicalIF":2.1,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099183","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":"Correction: Activated carbon derived from Cupressus sempervirens cones for hexavalent chromium removal from aqueous solutions","authors":"Loubna Sadaoui,&nbsp;Sihem Djebabra,&nbsp;Fedia Bekiri,&nbsp;Hanane Rehali,&nbsp;Ines Hamdi,&nbsp;Majda Charif,&nbsp;Djihad Telhas","doi":"10.1007/s11144-026-03150-9","DOIUrl":"10.1007/s11144-026-03150-9","url":null,"abstract":"","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 4","pages":"3067 - 3067"},"PeriodicalIF":2.1,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614510","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":"Catalysts for oxygen electroreduction based on multi-walled carbon nanotubes doped with cobalt, iron phthalocyanines, modified with palladium","authors":"Vladislav Mikhailovich Davydov,&nbsp;Roman Vladimirovich Shafigulin,&nbsp;Kirill Yurievich Vinogradov,&nbsp;Elena Olegovna Tokranova,&nbsp;Oleg Vyacheslavovich Korchagin,&nbsp;Anton Alekseevich Pimenov,&nbsp;Andzhela Vladimirovna Bulanova","doi":"10.1007/s11144-026-03168-z","DOIUrl":"10.1007/s11144-026-03168-z","url":null,"abstract":"<div><p>The influence of various dopants and modifiers on the catalytic activity of multi-walled carbon nanotube (MWCNT)-based oxygen reduction reaction catalysts was investigated. Transition metal phthalocyanines and urea were employed as nitrogen sources. Raman spectroscopy revealed that the incorporation of metal phthalocyanines leads to the formation of new carbon layers and a significant decrease in the overall ordering of the materials. All synthesized catalysts exhibited a mesoporous structure. Powder X-ray diffraction analysis elucidated the phase composition of the synthesized materials. The electrochemical performance was assessed using linear and cyclic voltammetry in a three-electrode cell with a rotating disk electrode. Notably, the MWCNT_CoPc_FePc_Pd catalyst demonstrated the highest activity and stability, approaching the performance of a commercial platinum catalyst in all electrochemical metrics. Furthermore, the MWCNT_CoPc_FePc_Pd catalyst, when tested in a fuel cell, exhibited high efficiency and stability comparable to those of a commercial platinum catalyst.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 5","pages":"3711 - 3732"},"PeriodicalIF":2.1,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098784","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":"Tunable interfacial control of short-chain alcohol evaporation from aqueous systems via reverse-flow gas chromatography","authors":"Khalisanni Khalid,&nbsp;H. H. Mohammad","doi":"10.1007/s11144-026-03153-6","DOIUrl":"10.1007/s11144-026-03153-6","url":null,"abstract":"<div><p>Evaporation rate coefficients (<i>K</i>_G) and diffusion coefficients (<i>D</i>) in alcohol–water systems were simultaneously quantified using reversed-flow gas chromatography (RF-GC). The measurements show that hydrogen bonding in aqueous mixtures reduces <i>K</i>_G relative to pure components, while increasing temperature enhances both <i>K</i>_G and <i>D</i>, consistent with thermally activated mass transfer. The presence of surfactants significantly alters interfacial transport: nonionic and cationic surfactants decrease <i>K</i>_G by forming interfacial barriers, whereas anionic surfactants increase <i>K</i>_G by disrupting interfacial structure. These results demonstrate that interfacial resistance is a controlling factor in evaporation and can be systematically modulated through surfactant chemistry. The study establishes RF-GC as an effective method for coupled determination of evaporation and diffusion parameters and provides quantitative evidence for tunable control of evaporation via interfacial modification.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 5","pages":"3891 - 3905"},"PeriodicalIF":2.1,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098769","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 of MnTiO3 nanoparticles using date extract for efficient photocatalytic degradation of triphenylmethane dye","authors":"Amina Benomara,&nbsp;Malika Mokhtari,&nbsp;Amel Boudjemaa","doi":"10.1007/s11144-026-03154-5","DOIUrl":"10.1007/s11144-026-03154-5","url":null,"abstract":"<div><p>The present study reports the synthesis of MnTiO₃ nanoparticles via an eco-friendly method using date extract as a bio-complexing agent, as well as their application as efficient heterogeneous photocatalysts for the degradation of methyl violet 2B (MV2B), a triphenylmethane dye widely used in the textile industry. The synthesized MnTiO₃ was characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The analysis was complemented by pH_PZC measurements and band gap energy determination. To assess the photocatalyst effectiveness for the degradation of MV2B, various photocatalytic tests were carried out, and the effects of process parameters such as irradiation time, photocatalyst dosage, and solution pH were studied. A kinetic study using the Gabor Lente method was also performed. Furthermore, to evaluate the role of the date extract in MnTiO₃ synthesis, citric acid was tested as a complexing agent under the same conditions.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 5","pages":"3907 - 3925"},"PeriodicalIF":2.1,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098715","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":"Hydrothermal synthesis of h-MoO3 catalyst for Rhodamine B degradation under visible light","authors":"Bing-Han Sun,&nbsp;Lu Wang,&nbsp;Lin-Lin Duan,&nbsp;Yu-Qing Wang","doi":"10.1007/s11144-026-03157-2","DOIUrl":"10.1007/s11144-026-03157-2","url":null,"abstract":"<div><p>In the work, hexagonal molybdenum trioxide (h-MoO₃) was synthesized via the hydrothermal reaction between ammonium heptamolybdate tetrahydrate (AHM) and concentrated nitric acid, and different technologies, such as XRD, FESEM, UV–vis DRS, PL, BET method and laser particle size analyzer, were adopted to characterize the experimental data. The results revealed that, when the reaction time was in the range of 8–14 h, single‑phase h-MoO₃ with the hexagonal-shaped morphology was synthesized; however, when the reaction time increased to 16 h, orthorhombic molybdenum trioxide (<i>α</i>-MoO₃) with the platelet-shaped morphology would form. The photocatalytic experiment results demonstrated that, with the increase of initial Rhodamine B (RhB) concentration, the degradation efficiency was gradually decreased; however, with the increase of h-MoO₃ dosage, the degradation efficiency showed a trend of first increase and then decrease. Due to the higher BET specific surface area (2.1801 m²/g), smaller particle size (1.06 μm), and lower recombination rate of photo-generated electron–hole pairs, h-MoO₃ micro-rods synthesized at 160℃ for 14 h exhibited a more excellent photocatalytic performance, with the degradation efficiency up to 98.28%. Additionally, the possible degradation mechanism was proposed.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 5","pages":"3941 - 3954"},"PeriodicalIF":2.1,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098713","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":"Application of the bisection method in nonlinear model-free kinetic analysis of solid-state reactions","authors":"Runshi Dong,&nbsp;Yongman Zhao,&nbsp;Chong Li","doi":"10.1007/s11144-026-03137-6","DOIUrl":"10.1007/s11144-026-03137-6","url":null,"abstract":"<div><p>This study investigates the feasibility of applying the bisection method to solve the minimization problem in the advanced nonlinear integral model-free kinetic method. Using theoretically simulated kinetic data with variable kinetic parameters, the objective function involved in the application of the advanced nonlinear integral model-free method was shown to exhibit a clear unimodal behavior, confirming the theoretical suitability of the bisection method in the implementation of the advanced nonlinear integral model-free kinetic method. The optimization process achieved stable convergence within few iterations at various conversions, demonstrating high computational efficiency and robustness. Sensitivity analysis revealed that the integration interval significantly influences accuracy, with reliable activation energy estimation obtained when Δα ≤ 0.005, as supported by small deviations between the calculated and simulated activation energies. These results demonstrate that integrating the bisection method into the advanced nonlinear integral model-free kinetic analysis provides a simple, stable, and efficient computational methodology.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"139 4","pages":"3371 - 3382"},"PeriodicalIF":2.1,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613449","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}