PVA@Au凝胶催化剂还原4-硝基苯酚的影响因素  

Properties of PVA@Au Gel Catalyst in Reduction of 4-nitrophenol

作　　者：秦少龙 杨晓娇[2] 周元林 王善强 QIN Shaolong;ZHOU Yuanlin;YANG Xiaojiao;WANG Shanqiang(State key Laboratory of Environmentally-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Institute of Material Research,China Academy of Engineering Physics,Mianyang 621908,Sichuan,China;State Key Laboratory of NBC Protection for Civilians,Beijing 102205,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010 [2]中国工程物理研究院材料研究所,四川绵阳621908 [3]国民核生化灾害防护国家重点实验室,北京102205

出　　处：《西南科技大学学报》2019年第4期6-13,共8页Journal of Southwest University of Science and Technology

基　　金：四川省科技厅基金项目(2018JY0287)

摘　　要：以PVA为基体、炔丙胺为炔基源,通过氨基甲酸在一定条件发生酯化反应,在PVA高分子链上引入炔基,形成炔基功能化的PVA高分子链来稳定Au粒子,制备出PVA@Au凝胶复合材料,并用于催化4-硝基苯酚还原反应以研究其催化活性。分别考察了不同载体、不同催化剂用量、不同pH值对4-硝基苯酚还原反应的影响。结果表明:多壁碳纳米是一种比较理想的载体,在酸性条件下其催化活性更好。对该催化剂进行了3次循环回收利用实验,循环3次后仍然可以使4-硝基苯酚的转化率达到100%。With polyvinyl alcohol(PVA)used as substrate and propargylamine as an alkyne source,the alkynyl group was introduced into the PVA polymer chain through the esterification reaction of carbamic acid under certain conditions to form an alkynyl functionalized PVA polymer chain to stabilize the Au particles.PVA@Au gel composite material was prepared and used to catalyze 4-nitrophenol reduction reaction to test its catalytic activity.The effects of different supports,catalyst dosage and pH value on 4-nitrophenol reduction were investigated.The results show that multi-walled carbon nanometer is an ideal carrier with better catalytic activity under acidic conditions.In addition,the conversion rate of 4-nitrophenol can reach 100%after the catalyst is recycled for three times.

关 键 词：聚乙烯醇(PVA) AU 催化活性 4-硝基苯酚 循环利用 

分 类 号：TS102.5[轻工技术与工程—纺织工程]