Preparation and performance of novel magnetic phase-change-microcapsule-supported Bi_(2)WO_(6)catalyst  

作　　者：Zhuoni Jiang Zhiqing Ge Shuo Yan Jingjing Shu Mozhen Wang Xuewu Ge 

机构地区：[1]Key Laboratory of Precision and Intelligent Chemistry,Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei 230026,China [2]School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China

出　　处：《Chinese Chemical Letters》2024年第3期158-161,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51973205 and 51773189);the Fundamental Research Funds for the Central Universities(Nos.WK9110000066,WK3450000005 and WK3450000006)。

摘　　要：The design and synthesis of novel photocatalyst with self-temperature control function is an important topic in the field of advanced environmental functional materials.In this work,submicron-sized magnetic phase change microcapsules composed of paraffin core and Fe_(3)O_(4)-loaded silica shell are prepared,on which the Bi_(2)WO_(6)crystals is grown in situ through hydrothermal reaction to obtain novel magnetic phase-change-microcapsule-supported Bi_(2)WO_(6)catalyst(MP@FS/BWO).The MP@FS/BWO has a paraffin encapsulation ratio of 57.1%,and the phase change enthalpy of 105.1 J/g in a temperature range of 50–60℃,which endows the MP@FS/BWO with a certain self-temperature regulation ability.MP@FS/BWO shows excellent catalytic performance in the decomposition of rhodamine B under the simulated sunlight irradiation.After the light source is turned off,it still has good catalytic ability by maintaining high temperature due to its temperature control function based on the phase transition process.The MP@FS/BWO can be easily recycled by magnetic separation and shows good structural stability and reusability.This work provides a new idea for the development of long-effect and energy-saving outdoor photocatalysts.

关 键 词：PHOTOCATALYST Phase change microcapsules Self-temperature regulation Bismuth tungstate Magnetic separation 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]