|本期目录/Table of Contents|

[1]王志强,韩伟昌,张成宇,等.高效可回收AX2型Fe3O4-mSiO2-Au纳米复合催化剂的制备及其性能[J].浙江理工大学学报,2020,43-44(自科六):797-805.
 WANG Zhiqiang,HAN Weichang,ZHANG Chengyu,et al.Preparation and performance of highefficient and recyclable  AX2 Type Fe3O4-mSiO2-Aunanocomposite catalyst[J].Journal of Zhejiang Sci-Tech University,2020,43-44(自科六):797-805.
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高效可回收AX2型Fe3O4-mSiO2-Au纳米复合催化剂的制备及其性能()
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浙江理工大学学报[ISSN:1673-3851/CN:33-1338/TS]

卷:
第43-44卷
期数:
2020年自科六期
页码:
797-805
栏目:
出版日期:
2020-11-27

文章信息/Info

Title:
Preparation and performance of highefficient and recyclable  AX2 Type Fe3O4-mSiO2-Aunanocomposite catalyst
文章编号:
1673-3851 (2020) 11-0797-09
作者:
 王志强韩伟昌张成宇祝强韬戚栋明孙阳艺
浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州 310018
Author(s):
 WANG Zhiqiang HAN Weichang ZHANG Chengyu ZHU Qiangtao QI Dongming SUN Yangyi
College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou 310018, China
关键词:
AX2型胶体分子磁性介孔氧化硅Au纳米粒子(Au NPs)催化剂
分类号:
O643-36
文献标志码:
A
摘要:
为制备一种催化性能优良的磁性介孔二氧化硅载Au复合催化剂,采用溶胶凝胶法,利用硅源前驱体在Fe3O4种子粒子上的异相成核与生长,制备了一种AX2型胶体分子结构的Fe3O4mSiO2载体材料,并继续负载Au后得到复合催化剂。通过TEM、BET、FIIR、XRD对所得复合催化剂的形貌和结构组成进行表征和分析。结果表明:通过调控氨水的用量,可得到AX2型Fe3O4mSiO2载体材料,其具有大的比表面积和良好的介孔孔道结构,可均匀负载Au NPs得到复合催化剂。在还原剂NaBH4存在下,将该复合催化剂用于催化罗丹明B(RhB)、4硝基苯酚(4NP)的还原反应,表现出良好的催化活性(5 min内将RhB分子100%转换为leuco分子形式)、有效的循环利用性(高达7次)和高稳定性,且RhB和4NP的催化一级动力学常数分别为067 min-1和032 min-1。复合催化剂表面上均匀稳定分布有Au NPs,其存在的介孔孔道结构可将吸附的RhB、4NP分子更好的与Au NPs活性位点接触,促进电子转移,从而提高了还原反应速率。该研究为设计新型高比表面积可回收催化剂载体材料提供了一种有效途径。

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-06-02
网络出版日期:2020-09-03
基金项目:国家自然科学基金青年基金项目(51703203);浙江省新苗人才计划项目(2019R406001)
作者简介:王志强(1998-),男,浙江丽水人,本科生,主要从事有机/无机杂化复合微球制备方面的研究
通信作者:孙阳艺,E-mail: yangyisun@zstu.edu.cn
更新日期/Last Update: 2020-11-05