摘要
采用多元醇沉淀以及光化学还原法制备了SiO2担载AgCl:Ag等离子体纳米粒子。通过表征发现SiO2@AgCl:Ag粒子呈立方-四足角状。同时,由于表面Ag簇的等离子共振效应,该催化剂在可见光区有很强的光吸收,可用于高效降解稳定的有机染料,例如,罗丹明B。合成的SiO2@AgCl:Ag复合催化剂可在2 min内将罗丹明B分子完全降解。自由基捕获实验进一步探究发现O2.-和.OH是参与降解反应的主要氧化活性物种。以上SiO2@AgCl:Ag的这些特性使其在水净化和环境治理方面有着潜在的应用。
A plasmonic AgCI：Ag nanoparticles supported on SiO2 has been prepared using polyol precipitation method followed by photoreduction. On the basis of characterization, it was found that SiO2@AgC1 ：Ag nanoparticles exhibit shaped cube-tetrapods. The as-prepared catalysts show strong absorption in visible region due to surface plasmon resonance of Ag nanograins, which are beneficial for photocatalytic degradation of toxic persistent organic pollutants, e.g., rhodamine B, under visible light irradiation. For example, only two minutes was taken to decompose rhodamine B molecules with the assistance of SiO2@AgCl：Ag. Furthermore, radical scavenger effects demonstrate that O2- and OH radicals are main active oxidation species in photocatalytic reaction. These features mean SiO2@AgCl ：Ag can find applications in the fields of water disinfection and environmental remediation.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2013年第8期1753-1758,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21001116)
中石油创新基金(No.2010D-5006-0505)资助项目
作者简介
通讯联系人。E—mail：anchh@ustc．edu。Tel：0532—86983415
