文献类型：期刊文献

英文题名：Anisotropic magnetic mesoporous silica catalyst-stir-bars for one-pot reduction-oxidation reaction

作者：Wu, Yue[1,2,4];Zhang, Chengyu[2];He, Mengyao[1,2];Xiu, Hao[1,2,3];Hu, Jing[4];Qi, Dongming[3];Sun, Yangyi[1,2,3]

机构：[1]Zhejiang Sci Tech Univ, State Key Lab Biobased Fiber Mat, Minist Educ, Hangzhou 310018, Peoples R China;[2]Zhejiang Sci Tech Univ, Zhejiang Prov Engn Res Ctr Green & Low Carbon Dyei, Minist Educ, Hangzhou 310018, Peoples R China;[3]Zhejiang Prov Innovat Ctr Adv Text Technol, Shaoxing 312000, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China

年份：2026

卷号：713

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20260920150294);WOS:【SCI-EXPANDED(收录号:WOS:001706516500001)】；

基金：This work was supported by the National Natural Science Foundation of China (51703203) . The authors gratefully acknowledge Dr. Yulong Ying from the School of Materials Science and Engineering, Zhejiang Sci-Tech University, for his assistance in recording the particle motion trajectory videos.

语种：英文

外文关键词：Asymmetric; Mesoporous silica; Catalyst carrier; Tandem catalysis

摘要：Asymmetric magnetic mesoporous silica (AMMS), consisting of mesoporous silica (mSiO2) anchored at one end of ferric oxide (Fe3O4) nanoparticles (NPs), has emerged as a promising catalyst carrier owing to its magnetic recyclability, high loading capability, and unique spatial separation, which enables enhanced mass transfer and accessibility of catalytic active sites. However, conventional AMMS systems typically suffer from chemical isotropy resulting from complete Fe3O4 encapsulation and limited tunability of mSiO2 morphology, thereby seriously restricting their efficacy in practical catalysis. Herein, we report an ionization-degree-mediated anisotropic assembly strategy to synthesize unconventional AMMS featuring exposed Fe3O4 (eFe3O4) heads and length-tunable mSiO2 rods. Upon loading with Au NPs, the resultant asymmetric magnetic mesoporous silica catalyst-stir-bars (AMMCs) exhibit enhanced catalytic performance in both Fenton oxidation of Acid Orange 7 (AO7) and hydrogenation of 4-nitrophenol (4-NP) and 2-nitroaniline (2-NA), achieving ultra-fast reaction rates that are orders higher than previously reported Au-based supported catalysts. Notably, the AMMCs also enable efficient one-pot reduction-oxidation catalysis of tetrabromobisphenol A (TBBPA), a reaction typically hindered by incompatible redox-active sites within traditional catalyst systems. In addition, the anisotropic rod-like architecture imparts magnetic-field-induced self-stirring capability, enhancing reaction kinetics by 1.65-fold. This work provides a robust and versatile synthetic strategy for structurally tunable and multifunctionally anisotropic magnetic catalysts for complex one-pot tandem catalysis reactions.