摘要
为开发高效稳定的光催化剂来清除空气污染物,采用沉淀-光照还原法制备Ag/Ag3PO4复合材料,利用XRD、SEM、UV-Vis和PL等方法对其进行表征。结果表明:Ag/Ag3PO4在银纳米粒子的肖特基势垒和局域表面等离子共振效应共同作用下,其光利用率高、光生载流子复合率低、光腐蚀弱。在模拟太阳光下,最优的光催化剂10Ag/Ag3PO4对NO转化率和NOx去除率分别为42.24%和29.05%,其转化NO的k值是Ag3PO4的1.36倍,且重复使用5次后,10Ag/Ag3PO4样品对NO转化率仍然保持在40%左右,明显优于纯Ag3PO4。
In order to develop efficient and stable photocatalysts to remove air pollutants,Ag/Ag3PO4 composites were constructed by deposition-light reduction method,and characterized by using XRD,SEM,UV-Vis and PL.The results showed that Ag/Ag3PO4 photocatalyst had high efficiency of light,low photocarrier recombination rate and weakened photocorrosion because of the effect of the schottky barrier and local surface plasmon resonance of Ag NPs.The NO conversion rate and NOx removal rate were 42.24%and 29.05%respectively on the optimal photocatalyst 10 Ag/Ag3PO4 under the simulated sunlight irradiation,and the k of NO conversion on 10 Ag/Ag3PO4 was 1.36 times higher than that of pure Ag3PO4.Furthermore,the NO conversion rate of 10 Ag/Ag3PO4 samples still remained about 40%after being reused for five times.
作者
汤春妮
孟龙
张桂锋
马喜峰
TANG Chun-ni;MENG Long;ZHANG Gui-feng;MA Xi-feng(Department of Chemical Engineering,Shaanxi Institute of Technology,Xi’an 710300,China)
出处
《当代化工》
CAS
2020年第10期2125-2128,共4页
Contemporary Chemical Industry
基金
陕西省教育厅专项科研计划项目资助(项目编号:19JK0083)
陕西省自然科学基础研究计划资助项目(项目编号:2019JM-389)
陕西国防工业职业技术学院科研计划项目(项目编号:Gfy18-06)
陕西高校第四批“青年杰出人才支持计划”(陕教工〔2020〕150号)
关键词
磷酸银
光催化
清除NOx
银纳米粒子
Silver phosphate
photocatalysis
removal of NO_x
Ag nanoparticles
