College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China.
College of Environmental Science Engineering, Key Laboratory of Environmental Biology Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China.
J Colloid Interface Sci. 2017 Nov 1;505:96-104. doi: 10.1016/j.jcis.2017.05.108. Epub 2017 May 28.
CdSnO·3HO (CSH) nanocubes modified with Ag/AgCl nanoparticles were constructed via the ultrasonic-assisted precipitation-photoreduction method. The obtained samples were characterized using various analytical techniques. Methyl orange (MO), tetracycline (TC), and oxytetracycline hydrochloride (OTC-HCl) were degraded as target pollutants under visible light irradiation to evaluate the photocatalytic activity of the as-prepared samples. Compared with pure CSH and Ag/AgCl nanoparticles, the developed composite of which 5mL of AgNO was added on the synthesis, labelled as 5-Ag/AgCl/CSH, occupied the best photocatalytic activity. The corresponding degradation rate for MO was 94% within 40min. 94% of TC and 90% of OTC-HCl were also degraded by 5-Ag/AgCl/CSH catalyst within 60min, respectively. The enhanced photocatalytic activity might arise from the surface plasmon resonance effect of Ag/AgCl nanoparticles and efficient separation of photogenerated electron-hole pairs. Meanwhile, a possible photocatalytic mechanism over 5-Ag/AgCl/CSH sample was proposed based on the experiment and theoretical analysis.
通过超声辅助沉淀-光还原法制备了CdSnO·3HO（CSH）纳米立方体修饰的Ag/AgCl 纳米粒子。采用多种分析技术对所得样品进行了表征。以甲基橙（MO）、四环素（TC）和盐酸土霉素（OTC-HCl）为目标污染物，在可见光照射下进行降解，以评价所制备样品的光催化活性。与纯 CSH 和 Ag/AgCl 纳米粒子相比，在合成中添加了 5mL 的 AgNO 的开发复合材料，标记为 5-Ag/AgCl/CSH，具有最佳的光催化活性。在 40min 内，MO 的降解率达到 94%。5-Ag/AgCl/CSH 催化剂在 60min 内分别使 TC 和 OTC-HCl 的降解率达到 94%和 90%。增强的光催化活性可能源于 Ag/AgCl 纳米粒子的表面等离子体共振效应和光生电子-空穴对的有效分离。同时，根据实验和理论分析，提出了 5-Ag/AgCl/CSH 样品的可能光催化机制。
