摘要
以AgNO_3、NaHCO_3、NaH_2PO_4和KCl为原料,采用两步法制备了有高活性且性能稳定的Ag-AgCl/Ag_3PO_4复合光催化剂,研究了该催化剂在紫外光下对阳离子染料废水番红花红T(简称ST)降解的催化反应性能。结果表明,当Ag-AgCl/Ag_3PO_4催化剂投加量0.8 g/L,ST的初始浓度70 mg/L,紫外光照60 min,初始pH=3.0的酸性条件时,其催化效率最佳,ST的降解率可高达98.0%,并且催化剂循环使用5次后,催化剂的催化活性无明显下降,稳定性较好;Ag-AgCl/Ag_3PO_4对ST基本无吸附作用。紫外光催化机理实验表明,(·O_2^-)及羟基自由基(·OH)是紫外光催化降解有机物过程中的主要活性物种。
With AgNO3,NaHCO3 and NaH2PO4 and KCl as raw material,the two-step method is applied to synthesize Ag-AgCl/Ag3PO4,a composite photocatalyst with high catalytic activity and stability. The degradation catalytic effects under UV light on Safranine T（ ST） is studied. The results show that when the Ag-Ag Cl/Ag3PO4 catalyst dosage 0. 8 g/L,the initial concentration of ST 70 mg/L,UV irradiation time60 min,initial pH = 3. 0,the best catalytic degradation rate can be as high as 98%,and the catalyst is recycled 5 times,the catalytic activity has no obvious decline,and the stability has good. Ag-AgCl/Ag3PO4 no adsorption of ST. The further tests demonstrate that（ · O2-） and hydroxyl radical（ ·OH） play a significant role in the UV light photodegradation of Safranine T.
出处
《应用化工》
CAS
CSCD
北大核心
2017年第7期1354-1358,共5页
Applied Chemical Industry
基金
湖南省教育厅科学研究项目(14C0317)
湖南省教育厅科学研究重点项目(14A036)
衡阳市科学技术发展计划项目(2015KJ31)
湖南工学院校级科研项目(HY14012)
关键词
染料废水
复合光催化剂
紫外光
番红花红T
光催化性能
dye wastewater
composite photocatalyst
UV light
Safranine T
photocatalytic performance
