石油化工高等学校学报2026，Vol.39Issue(1)：75-82,8.DOI:10.12422/j.issn.1006-396X.2026.01.009
纳米金/灌流硅胶复合微球的制备及催化还原4-硝基苯酚的性能研究
Preparation of Gold Nanoparticle/Perfused Silica Composite Microspheres and Evaluation of Their Catalytic Performance in the Reduction of 4-Nitrophenol
摘要
Abstract
Gold nanoparticles(Au NPs)exhibit great application potential in the reduction of aromatic nitro compound pollutants,owing to their nanoscale size effects and excellent catalytic properties.However,their tendency to aggregate has hindered practical applications.In this study,perfusion silica gel microspheres(PSM)with a hierarchical porous structure comprising macropores,mesopores,and perfusion pores were used as a support material.The surface of the PSM was first modified with thiol groups and then combined with gold nanoparticles to fabricate Au NPs/PSM composite microspheres.These composite microspheres were characterized by SEM,TEM,Raman spectroscopy and XRD.The catalytic performance of the Au NPs/PSM catalyst in reducing 4-nitrophenol to 4-aminophenol was investigated.The results showed that the composite microspheres retained their perfusion channels,and the Au NPs were uniformly distributed on the PSM surface.The average size of the Au NPs was approximately 4.8 nm,with a mass loading fraction of 2.72%.The Au NPs/PSM composite was employed as a catalyst for the reduction of 4-nitrophenol to 4-aminophenol.At 30 ℃,the catalytic reaction followed first-order kinetics,with a rate constant of 0.103 min-1.The composite microspheres demonstrate excellent catalytic activity,good stability,and high recyclability.关键词
纳米金粒子/灌流硅胶微球/4-硝基苯酚/催化Key words
Gold nanoparticles/Permeation silica microspheres/4-nitrophenol/Catalytic reaction分类
化学化工引用本文复制引用
沈晓明,屈舒,郭俊芳..纳米金/灌流硅胶复合微球的制备及催化还原4-硝基苯酚的性能研究[J].石油化工高等学校学报,2026,39(1):75-82,8.基金项目
国家自然科学基金项目(21001085) （21001085）
武汉工程大学第十六届研究生教育创新基金项目(CX2024306). （CX2024306）
