RSC Advances最新文献_第2页

Effects of combined UV-tensile aging on structural and electrical properties of high temperature vulcanized silicone rubber in composite insulators uv -拉伸复合老化对复合绝缘子中高温硫化硅橡胶结构和电性能的影响

IF 4.6 3区化学

RSC Advances Pub Date : 2025-07-30 DOI: 10.1039/D5RA03926F

Shiyin Zeng, Wendong Li, Wuji He, Yuelin Liu, Xinyi Yan, Ming Lu, Chao Gao and Guanjun Zhang

{"title":"Effects of combined UV-tensile aging on structural and electrical properties of high temperature vulcanized silicone rubber in composite insulators","authors":"Shiyin Zeng, Wendong Li, Wuji He, Yuelin Liu, Xinyi Yan, Ming Lu, Chao Gao and Guanjun Zhang","doi":"10.1039/D5RA03926F","DOIUrl":"https://doi.org/10.1039/D5RA03926F","url":null,"abstract":"High-temperature vulcanized silicone rubber (HTV-SR) in composite insulators undergoes performance degradation under prolonged ultraviolet (UV) exposure and mechanical stress in plateau environments, posing risks to power grid reliability. To investigate the aging behavior and mechanism of HTV-SR under coupled UV and tensile stress conditions, accelerated aging tests are conducted for 500 hours under constant UV irradiation combined with varying tensile stresses. Surface morphology, structure, mechanical and electrical properties of HTV-SR samples before and after aging are systematically characterized to analyze the synergistic and competitive effects of UV and tensile aging. The results show that UV irradiation induces chain scission and oxidative crosslink, increasing surface crosslink density while deteriorating the mechanical and electrical performance. In contrast, tensile stress alone causes minor structural disturbances due to the inherent elasticity of the material, with limited impact on electrical properties. Under combined aging, tensile stress reduces the effective surface crosslink density and inhibits UV-induced oxidative crosslink. As the tensile ratio increases, molecular chains exhibit more pronounced stress relaxation and filler debonding, further accelerating UV-induced structural and electrical degradation. This study provides theoretical support for the weathering assessment of composite insulators and highlights the importance of maintaining an appropriate crosslink density of HTV-SR to enhance structural and electrical stability in service environments.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 27177-27186"},"PeriodicalIF":4.6,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03926f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Synergistic, theoretical, and experimental study of the interaction of a tri-heterometallic polymer with bovine liver catalase† 三异金属聚合物与牛肝过氧化氢酶†相互作用的协同，理论和实验研究

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA02826D

Narges Lashkarzade, Fereshteh Shiri, Somaye Shahraki, Zohreh Razmara and Mostafa Heidari Majd

{"title":"Synergistic, theoretical, and experimental study of the interaction of a tri-heterometallic polymer with bovine liver catalase†","authors":"Narges Lashkarzade, Fereshteh Shiri, Somaye Shahraki, Zohreh Razmara and Mostafa Heidari Majd","doi":"10.1039/D5RA02826D","DOIUrl":"https://doi.org/10.1039/D5RA02826D","url":null,"abstract":"Reactive oxygen species (ROS) modulate redox balance and cellular processes such as proliferation, angiogenesis, metabolism, immune modulation, and metastasis. Metal-based polymeric complexes have shown potential in disrupting oxidative pathways relevant to tumor development. A comprehensive investigation was conducted on the interaction between a Cu/Mn/Na polymer and catalase, as well as its cytotoxic behavior. The compound exhibited notable antioxidant properties, achieving 61.2% inhibition of the DPPH radical at 125 μM after 60 min. Additionally, the polymer enhanced bovine liver catalase (BLC) activity by up to 138.9% at 7.7 × 10−6 M, with a moderate binding constant in the range of 104 M−1. Fluorescence analyses revealed a static quenching mechanism, and molecular docking revealed hydrogen bonding and van der Waals forces to be the key stabilizing interactions. Conformational analyses demonstrated significant structural alterations in BLC upon polymer interaction. The MTT assay revealed considerable antiproliferative effects against colon carcinoma (HCT116) cells, with activity comparable with that of cisplatin at higher concentrations. Importantly, unlike cisplatin, the polymer exhibited minimal toxicity towards normal cells (NIH/3T3), suggesting its potential as an anticancer agent. These findings indicate the potential of the polymer as a redox-modulating therapeutic agent with promising anticancer properties.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 27033-27045"},"PeriodicalIF":3.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra02826d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Design of a simple solution-processed universal shell for synthesizing reverse type-I core–shell structures toward high-efficiency water-splitting photocathodes† 一种简单的溶液处理通用壳的设计，用于合成用于高效水分解光电阴极的反i型核壳结构

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA04253D

Minju Kim, Jeong-Mi Yeon, G. Hwan Park, Hyunjung Kim, Minseo Kim, Sun Yong Choi, Sung Won Hwang, Sung-Hwan Lim and Hanleem Lee

{"title":"Design of a simple solution-processed universal shell for synthesizing reverse type-I core–shell structures toward high-efficiency water-splitting photocathodes†","authors":"Minju Kim, Jeong-Mi Yeon, G. Hwan Park, Hyunjung Kim, Minseo Kim, Sun Yong Choi, Sung Won Hwang, Sung-Hwan Lim and Hanleem Lee","doi":"10.1039/D5RA04253D","DOIUrl":"https://doi.org/10.1039/D5RA04253D","url":null,"abstract":"Core–shell colloidal nanocrystals (CNCs) are promising candidates for photoelectrochemical (PEC) photocathodes due to their strong light absorption, tunable bandgaps, and efficient charge separation. In this study, we developed a simple and versatile strategy for fabricating narrow-bandgap shells compatible with various core materials. Among the configurations tested, the matrix-type MoSx shell demonstrated the most effective performance, significantly enhancing photocurrent generation and operational stability through improved surface defect passivation and charge carrier separation. Band-level engineering further enabled the formation of reverse type-I heterojunctions in both CdSe and CIS2 CNCs. Although type-II systems are traditionally favored for charge separation, our results show that the reverse type-I architecture not only enhances photocarrier separation under standard illumination but also effectively suppresses dark current. This is attributed to the dual physical and electronic passivation provided by the reverse type-I structure, which stabilizes the core–shell interface and reduces nonradiative recombination. Notably, the Cu2O/CuO/red CIS2 CNCs with a high indium ratio achieved the highest photocurrent density and retained over 86% of their initial performance after 24 hours of continuous operation at −0.1 V vs. RHE, demonstrating excellent long-term stability. These results highlight the strong potential of matrix-type reverse type-I core–shell CNCs as efficient and durable photocathode materials for PEC applications.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 27016-27025"},"PeriodicalIF":3.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra04253d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

An experimental investigation of vibrational, optical, and dielectric properties of Li–Mg ferrite for potential high-frequency and optoelectronic applications Li-Mg铁氧体的振动、光学和介电性能的实验研究，用于潜在的高频和光电应用

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA03292J

Ibtihel Soudani, Najoua Weslati, Sami Znaidia, Abderrazek Oueslati, Abdelhedi Aydi and Kamel Khirouni

{"title":"An experimental investigation of vibrational, optical, and dielectric properties of Li–Mg ferrite for potential high-frequency and optoelectronic applications","authors":"Ibtihel Soudani, Najoua Weslati, Sami Znaidia, Abderrazek Oueslati, Abdelhedi Aydi and Kamel Khirouni","doi":"10.1039/D5RA03292J","DOIUrl":"https://doi.org/10.1039/D5RA03292J","url":null,"abstract":"Spinel lithium ferrites hold considerable significance in technological applications. Numerous investigations are conducted to explore the mechanisms underlying their properties. This work aims to detail the vibrational, optical, dielectric, thermodynamic, and magnetic properties of the LiMg0.5Fe2O4 compound. Infrared and Raman spectroscopy further indicate the formation of the spinel phase in the samples. The optical study reveals a direct band gap with semiconducting characteristics, approximately 2.15 eV, with a low Urbach energy, indicating minimal disorder. Furthermore, precise calculations of thermodynamic parameters, including entropy change (ΔS), enthalpy change (ΔH), and free energy of activation (ΔF), provide additional insights into the properties of the compound. High dielectric permittivity values, reaching around 105, are observed and attributed to the Maxwell–Wagner interfacial polarization mechanism. The remanent magnetization (Mr = 0.97 emu g−1) and coercive field (HC = 4.55 Oe) extracted from the M–H loop are both notably low, clearly indicating the superparamagnetic nature of the sample. Our results show that LiMg0.5Fe2O4 ferrite is a promising candidate for applications in multifunctional devices.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 26873-26885"},"PeriodicalIF":3.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03292j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Study on the synthesis of nano-hydroxyapatite assisted by sodium dodecyl sulfate significantly enhances the adsorption performance of rhodamine B 十二烷基硫酸钠辅助合成纳米羟基磷灰石的研究，显著提高了罗丹明B的吸附性能

IF 4.6 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA02317C

Ya-Ni Zhang, Qiu-Yan Yang, Peng Wang, Jia-Hui Li, Shu-Yao Zhang, En-Peng Deng, Xue-Min Wang, Jipeng Meng and Yu-Xin Miao

{"title":"Study on the synthesis of nano-hydroxyapatite assisted by sodium dodecyl sulfate significantly enhances the adsorption performance of rhodamine B","authors":"Ya-Ni Zhang, Qiu-Yan Yang, Peng Wang, Jia-Hui Li, Shu-Yao Zhang, En-Peng Deng, Xue-Min Wang, Jipeng Meng and Yu-Xin Miao","doi":"10.1039/D5RA02317C","DOIUrl":"https://doi.org/10.1039/D5RA02317C","url":null,"abstract":"In this study, we synthesized sodium dodecyl sulfate modified hydroxyapatite (SDS-HAP) to enhance the removal efficiency of rhodamine B (RhB) dye. The SDS-HAP prepared using the sol–gel method exhibited a significantly higher adsorption capacity compared to pristine HAP. Various characterization techniques, including X-ray diffraction (XRD), N2 adsorption–desorption isotherms, Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM), were utilized to systematically investigate the morphological and structural changes. Batch experiments were conducted to evaluate the influence of RhB concentration, pH value, temperature, dosage, and contact time on the adsorption performance. Results indicated that the addition of SDS increased the specific surface area from 72.8 to 136.8 m2 g−1. The equilibrium adsorption capacity of SDS-HAP for RhB was approximately 3.3 times greater than that of pure HAP. Kinetic studies revealed rapid equilibrium following the pseudo-second-order model (R2 = 0.9999). The Freundlich isotherm model best described the experimental data, with a maximum adsorption capacity of 44.1 mg g−1. Thermodynamic analysis confirmed that the adsorption process was spontaneous, endothermic, and driven by hydrogen bonding and electrostatic interactions between the dye molecules, PO43−, Ca2+ and OH−.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 27046-27056"},"PeriodicalIF":4.6,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra02317c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Material properties and progress in modification of hydrogel-based self-expandable poly(methyl methacrylate) bone cement 水凝胶基自膨胀聚甲基丙烯酸甲酯骨水泥材料性能及改性研究进展

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA00592B

Haochang He, Yuanbiao Liu, Yukai Dong, Wenjie Zhao, Keyuan Wang, Kai Guo, Enxiang Jiao, Shanshan Xu, Guannan Ju, Peng Wang, Duanhong Ma, Gaopeng Shi and Haijun Zhang

{"title":"Material properties and progress in modification of hydrogel-based self-expandable poly(methyl methacrylate) bone cement","authors":"Haochang He, Yuanbiao Liu, Yukai Dong, Wenjie Zhao, Keyuan Wang, Kai Guo, Enxiang Jiao, Shanshan Xu, Guannan Ju, Peng Wang, Duanhong Ma, Gaopeng Shi and Haijun Zhang","doi":"10.1039/D5RA00592B","DOIUrl":"https://doi.org/10.1039/D5RA00592B","url":null,"abstract":"Although traditional poly(methyl methacrylate) (PMMA) bone cements have been widely used in clinical practice, they are beset with many inherent drawbacks such as high polymerization heat, weak osteoinductive and osteoconductive ability, low bioactivity, volumetric shrinkage upon solidification, etc., which significantly limit its clinical application prospects. Chemical or physical modification of PMMA matrix to regulate its material properties has become a research hotspot in the field of bone tissue repair. Self-expandable PMMA bone cement (SBC) is a novel bone cement developed by copolymerizing PMMA matrix with hydrophilic monomers such as acrylic acid, hydroxyethyl acrylate, etc. They are of high bioactivity and adjustable mechanical properties, along with excellent volumetric swelling capability due to the spontaneous water absorption in body fluids. Moreover, with the addition of appropriate antibiotics and fillers, SBC can effectively prevent/heal tissue infection around the implant, and exhibit versatile biomechanical properties required for in vivo implantation, making SBC one of the best alternatives to replace commercially available bone cements. In this paper, the material properties and progress in modification of SBC will be reviewed, the influence of functional monomers and fillers on the biomechanical properties of SBC will be discussed, and the future research direction of SBC will be proposed.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 26959-26980"},"PeriodicalIF":3.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra00592b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fast and sensitive analysis of explosive compounds using Co3O4–MnO2@MWCNTs nanocomposite integrated electrochemical sensing platform† 利用Co3O4 - MnO2@MWCNTs纳米复合材料集成电化学传感平台†快速灵敏地分析爆炸性化合物

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA03807C

Mohamed F. El-berry, Ahmed M. Abdalla, Mohamed S. Attia and Rabeay Y. A. Hassan

{"title":"Fast and sensitive analysis of explosive compounds using Co3O4–MnO2@MWCNTs nanocomposite integrated electrochemical sensing platform†","authors":"Mohamed F. El-berry, Ahmed M. Abdalla, Mohamed S. Attia and Rabeay Y. A. Hassan","doi":"10.1039/D5RA03807C","DOIUrl":"https://doi.org/10.1039/D5RA03807C","url":null,"abstract":"Fast and accurate determination of toxic and explosives compounds are necessary. Thus, a portable-electrochemical sensing system was developed for the rapid and sensitive detection of 2,4,6-trinitrotoluene (TNT) using a screen-printed electrode (SPE) modified with a Co3O4/MnO2@MWCNTs nanocomposite. This nanocomposite combines the electrocatalytic activity of the hybrid metal oxides (Co3O4 and MnO2) with the high conductivity and surface area of multi-walled carbon nanotubes (MWCNTs), resulting in enhanced sensor performance. The modified SPE exhibited excellent electrocatalytic activity towards TNT voltammetric reduction, showing a well-defined voltammetric response. Electrochemical characterization using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) demonstrated the improved electron transfer kinetics and reduced charge transfer resistance at the modified electrode. Differential pulse voltammetry (DPV) was employed for quantitative TNT detection, achieving a linear response in the concentration range of 0.33 to 50 ppm with a detection limit of 0.153 ppm. The sensor demonstrated good selectivity against common interferents and other nitroaromatic compounds. Furthermore, the newly developed sensor surface exhibited satisfactory stability and reproducibility, making it a promising candidate for on-site and real-time TNT detection in environmental and security applications.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 27063-27075"},"PeriodicalIF":3.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03807c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Hydration performance and optimization of multi-solid waste composite calcined sewage sludge 多固废复合煅烧污泥的水化性能及优化

IF 4.6 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA03875H

Juntao Ma, Hao Zheng, Hao Qiu, Yunfei Tan and Shunbo Zhao

{"title":"Hydration performance and optimization of multi-solid waste composite calcined sewage sludge","authors":"Juntao Ma, Hao Zheng, Hao Qiu, Yunfei Tan and Shunbo Zhao","doi":"10.1039/D5RA03875H","DOIUrl":"https://doi.org/10.1039/D5RA03875H","url":null,"abstract":"The rapid increase in sewage sludge (SS) production and the global pursuit of carbon neutrality have driven the demand for the high-value construction material utilization of SS. In this study, calcium-rich solid wastes—carbide slag (CS) and phosphogypsum (PG)—were co-calcined with SS at elevated temperatures (800–1000 °C) to address the insufficient cementitious activity of thermally activated sludge. The resulting products were used to replace 30% of ordinary Portland cement (OPC) in pastes. The effects of calcination temperature, CS addition, and PG addition on the properties of calcined SS and its pastes were systematically investigated using XRD, FTIR, SEM, T2NMR, and TG-DSC. Results showed that calcination at 800 °C converted kaolinite and muscovite in SS into amorphous reactive phases, significantly enhancing pozzolanic activity and mechanical strength. Co-calcination with CS and PG facilitated the formation of anorthite and calcium aluminate gels, further improving paste hydration (AFt, CH formation) and reducing its porosity. When CS and PG replaced 30% and 15% of SS, respectively, and the mixture was calcined at 800 °C, a clear synergistic hydration effect was observed. Response surface methodology identified the optimal conditions as 882.45 °C, 14.78% CS, and 2.62% PG, under which the compressive strength reached 85% of that of OPC, with a production cost of 190.19 RMB per t and carbon emissions of 529.17 kg CO2 e per t, both notably reduced compared to OPC. These results demonstrate that MWCS is a promising sustainable cementitious material for low-strength engineering applications or as a partial cement replacement.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 32","pages":" 26428-26443"},"PeriodicalIF":4.6,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03875h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Preparation and characterization of kaolin–[TMS]–NH2+C(NO2)3− as a novel heterogeneous nano-catalyst and its use in the synthesis of imidazo[1,2-a]pyrimidine and 1,2,4-triazolo[4,3-a]pyrimidines† 新型非均相纳米催化剂高岭土- [TMS] - nh2 +C(NO2)3−的制备与表征及其在咪唑[1,2-a]嘧啶和1,2,4-三唑[4,3-a]嘧啶合成中的应用

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA01292A

Mahla Dorostkar, Leyla Nazemi-Nasyrmahale and Farhad Shirini

{"title":"Preparation and characterization of kaolin–[TMS]–NH2+C(NO2)3− as a novel heterogeneous nano-catalyst and its use in the synthesis of imidazo[1,2-a]pyrimidine and 1,2,4-triazolo[4,3-a]pyrimidines†","authors":"Mahla Dorostkar, Leyla Nazemi-Nasyrmahale and Farhad Shirini","doi":"10.1039/D5RA01292A","DOIUrl":"https://doi.org/10.1039/D5RA01292A","url":null,"abstract":"This article presents a highly efficient and eco-friendly method for synthesizing imidazo[1,2-a]pyrimidines and 1,2,4-triazolo[4,3-a]pyrimidines using a novel nano-catalyst, kaolin–[TMS]–NH2+C(NO2)3−, under solvent-free conditions. The catalyst was thoroughly characterized by FT-IR, XRD, TGA, EDX, FESEM, TEM and BET, by combining these techniques, the catalyst's structural integrity, composition, morphology, porosity, and thermal stability were thoroughly validated, making it suitable for high-temperature catalytic applications. The method offers exceptional efficiency, achieving product yields of 92–98% within remarkably short reaction times, significantly outperforming conventional approaches. Notably, the catalyst exhibited excellent recyclability, maintaining its activity over four consecutive cycles without loss of efficiency. Key advantages include simplified product isolation, elimination of hazardous solvents, and a straightforward catalyst synthesis protocol, making this approach both economically and environmentally viable for large-scale applications.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 33","pages":" 26992-27015"},"PeriodicalIF":3.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra01292a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Preparation and printing optimization of an organic carrier for silver paste on the front side of solar cells 太阳能电池正面银浆有机载体的制备与印刷优化

IF 3.9 3区化学

RSC Advances Pub Date : 2025-07-29 DOI: 10.1039/D5RA03728J

Yongqing Hu, Yibo Huang, Lei Li, Jiqiang Gao, Kai Zhou, Liang Fang and Hu Sun

引用次数: 0