第一作者：Ai, Yongjian

通讯作者：Hong-bin Sun,Qionglin Liang

合写作者：Hu, Zenan, Shao, Zixing, Qi, L, Liu, Lei, Zhou, Junjie

发表刊物：Nano Research

期号：1

卷号：11

影响因子：9.5

DOI码：10.1007/s12274-017-1631-2

所属单位：Department of Chemistry, Northeastern University

教研室：物理化学

刊物所在地：PEOPLES R CHINA

摘要：A novel egg-like nanosphere was designed as a long-lived catalyst and is described as Fe3O4@nSiO(2)-NH2-Fe2O3.xBi(2)O(3)@mSiO(2). The catalyst was prepared using a modified Stober method with template-free surface-protected etching. The catalyst particle consists of a magnetic Fe3O4 core as the "yolk", an inner silica shell bearing active Fe2O3.xBi(2)O(3) species as the "egg white", and outer mesoporous silica as the "egg shell". It exhibits an excellent performance in the catalytic reduction of nitro aromatics to corresponding anilines in a fixed-bed continuous-flow reactor. The reaction could be performed at 80 degrees C and could reach complete conversion in less than 1 min with only a 7% excess of hydrazine hydrate. The catalyst bed could be easily shifted between different substrates without cross-contamination because of the uniformity of the catalyst particles. This catalyst exhibited very good stability in the continuous-flow protocol. In the long-term reduction of p-nitrophenol with 0.5 mmol.min(-1) productivity, it worked for more than 1,500 cycles without any catalytic activity loss.

关键字：magnetically immobilized; continuous-flow; egg-like; catalytic reduction; nitro compounds

论文编号：WOS:000419002100023

学科门类：理学

一级学科：化学

页面范围：287-299

ISSN号：1998-0124

是否译文：否