化学工程Issue(1)：58-62,5.DOI:10.3969/j.issn.1005-9954.2016.01.013
Ag＠AgCl/Mg-Al-LDHs 复合光催化剂的制备及可见光催化活性
Preparation and photocatalytic activity of Ag@AgCl/Mg-Al-LDHs composite catalyst under visible light
摘要
Abstract
Mg-Al layered double hydroxides (Mg-Al-LDHs ) were prepared as carrier by supersaturated precipitation method and then AgCl nanoparticles were then loaded onto the Mg-Al-LDHs by a precipitation reaction using AgNO3 and HCl,and some of the AgCl particles were reduced to Ag particles under halogen tungsten lamp irradiation.This gave a visible light SPR photocatalyst of Ag@AgCl /Mg-Al-LDHs of high photocatalytic activity. The resulting photocatalysts were characterized by XRD,SEM,TG-DTG,FT-IR and BET techniques to determine their phase structures and micromorphologies.The results showed that the Mg-Al-LDHs of smaller size of loaded Ag@AgCl NPs and larger loading surface led to higher dispersion that not only increased the reactive sites but also enhanced the redox capability of photogenerated electron-hole pair in Ag@AgCl NPs,thereby,the catalytic activity of composite photocatalysts was enhanced.Under the visible light irradiation (λ>420 nm),Ag@AgCl /Mg-Al-LDHs performed higher photocatalytic degradation of Methylene blue(MB)than pure Ag@AgCl ,so the optimal photocatalytic activity was found with a 96.04% degradation efficiency of MB with 1 0 mg/L mass concentration under visible light irradiation for 1 80 min when the mass fraction of Ag@AgCl was 1 6%.关键词
镁铝层状双金属氢氧化物/银/氯化银/等离子体共振/可见光催化/亚甲基蓝Key words
Mg-Al-LDHs/silver/silver chloride/plasmon resonance/visible light catalytic/methylene blue分类
化学化工引用本文复制引用
韩玉琦,宋红娟,魏玉娟,金淑萍,朱玉珍,张明皓,杨自嵘,刘梦影..Ag＠AgCl/Mg-Al-LDHs 复合光催化剂的制备及可见光催化活性[J].化学工程,2016,(1):58-62,5.基金项目
国家自然科学基金资助项目（51263008）；甘肃省高校河西走廊特色资源利用省级重点实验室面上项目（XZ1409）；河西学院教学研究课题项目（HXXYJX-2014-14）；河西学院大学生科技创新活动项目；河西学院青年基金项目 （）
