文献类型：期刊文献

英文题名：Enhanced catalytic nitrophenol reduction via highly porous hollow silica nanospheres stabilized Au nanoclusters

作者：Hu, Ru[1];Xu, Rui[2];Wang, Zizhu[1];Wang, Junyou[1];Zhou, Shenghu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Div Funct Mat & Nanodevices, 1219 Zhongguan West Rd, Ningbo 315201, Peoples R China

年份：2023

卷号：471

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20233014432701);WOS:【SCI-EXPANDED(收录号:WOS:001047183900001)】；

语种：英文

外文关键词：Au nanoclusters; Nitrophenol reduction; Hollow; Heterogeneous catalysis; Nanostructures

摘要：In this work, we report the synthesis of Au nanoparticles encaged in hollow porous silica nanospheres (Au@HPSNs), which features extremely small Au nanoclusters (-1.3 nm) encapsulated in high specific surface area (-800 m2/g) HPSNs. We used the electrostatic attraction between the anions of poly(acrylic acid) (PAA) and protonated poly(ethylenimine) (PEI) to build the micelles system in an ethanol-water system, which was employed as the templates for deposition of silica to give the core-shell structured PEI-PAA@SiO2. The final materials Au@HPSNs were obtained by soaking PEI-PAA@SiO2 in HAuCl4 solution and subsequent calcination. The Au@HPSNs show extremely high catalytic efficiency for 4-nitrophenol (4-NP) reduction with NaBH4, and exhibit the highest heterogeneous Au-based catalytic efficiency up to date for 4-NP reduction. The greatly enhanced performance of Au@HPSNs could be ascribed to ultra-fine Au nanoclusters and the small mass transfer hindrance with high specific surface area hollow porous silica.