文献类型：期刊文献

英文题名：Controlled Synthesis of Manganese Oxide Nanoparticles Encaged in Hollow Mesoporous Silica Nanoreactors and Their Enhanced Dye Degradation Activity

作者：Wei, Jinxia[1];Li, Kaijie[1];Yu, Hongbo[2];Yin, Hongfeng[2];Stuart, Martien A. Cohen[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, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

年份：2020

卷号：5

期号：12

起止页码：6852

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000523299700065)】；

基金：S. Zhou and H. Yin thank the National Natural Science Foundation of China for financial support (Grant Nos. 21776090 and 21571183), and this work is also partially supported by the Industrial R&D Foundation of Ningbo (Grant No. 2017B10040) and the Natural Science Foundation of Shanghai (Grant No. 17ZR1440500).

语种：英文

摘要：In this study, controlled synthesis of hollow mesoporous silica nanoreactors with small manganese oxide nanoparticles in their cavities (MnxOy@HMSNs) is reported, and the dye degradation performance in the presence of hydrogen peroxide over MnxOy@HMSNs is investigated. Specifically, triple ligands (a compound with three dipicolinic acid groups) were used to coordinate manganese ions to form negatively charged coordination complex networks, which further combine with positively charged copolymers to obtain metal ion-containing polymer micelles. Following silica deposition onto micellar coronas and calcinations simultaneously result in hollow mesoporous silica nanoreactors and manganese oxide nanoparticles in their cavities. In this work, the influences of synthetic parameters on the structures are studied in detail. The obtained MnxOy@HMSNs show greatly enhanced activity and stability for a series of dye degradations. The performance enhancement is ascribed to their unique nanostructures, where mesoporous silica walls provide protection to the inner MnxOy nanoparticles and the small size of the manganese oxide nanoparticles greatly enhances the dye degradation activity.