Ag@硅氧倍半聚合物的合成及其对对硝基苯酚的催化还原性能  

Ag@Silsequioxanes:Synthesis and Its Catalytic Reduction Performance for p-Nitrophenol

作　　者：吴洪花 祖凤华[2] 付山 董晓龙 李素云 义建军[2] 郝海军 徐庆红 WU Hong-Hua;ZU Feng-Hua;FU Shan;DONG Xiao-Long;LI Su-Yun;YI Jian-Jun;HAO Hai-Jun;XU Qing-Hong(College of Chemistry,Beijing University of Chemical Technology,Beijing 100029,China;Petrochemical Research Institute of PetroChina Company Limited,Beijing 102206,China)

机构地区：[1]北京化工大学化学学院,北京100029 [2]中国石油天然气股份有限公司石油化工研究院,北京102206

出　　处：《无机化学学报》2021年第11期1961-1969,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.U1362113)资助。

摘　　要：以氨丙基三乙氧基硅烷和草酰氯为原料,合成得到链上含亚氨基和羰基官能团的硅氧倍半聚合物。以此聚合物为载体,通过配位吸附和还原得到银纳米粒子(平均粒径约为15 nm)高度分散于硅氧烷聚合物表面的复合物。研究结果表明,复合物中银负载量(质量分数)约为13.66%,在水溶液中25℃、6 min内可将对硝基苯酚(4-NP)完全催化还原为对氨基苯酚(4-AP),且7次循环使用后依然保持95%以上的催化活性。在常温常压条件下,催化剂的最高活性达到33.0 g4-AP·gAg^(-1),表现出优异的催化还原性能。Aminopropyltriethoxysilane and oxalyl chloride were used as raw materials to synthesize silsesquioxanes containing imino and carbonyl functional groups.A composite with silver nanoparticles(average particle size of about 15 nm)uniformly dispersed on the surface of the siloxane polymer was obtained through coordination adsorp-tion and reduction.The research results showed that the weight percentage of silver loaded in the composite was about 13.66%and p-nitrophenol(4-NP)was completely reduced to 4-aminophenol(4-AP)within 6 min at 25℃in aqueous solution by the composite catalyst,and the composite catalyst remained 95%activity after used 7 times.Under room temperature and one atmospheric pressure,the highest activity of the composite catalyst was about 33.0 g4-AP·gAg^(-1),which showed excellent catalytic reduction performance.

关 键 词：硅氧倍半聚合物 银纳米粒子 催化还原 对硝基苯酚 对氨基苯酚 

分 类 号：O614.1[理学—无机化学]