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Ag-AgCl/Ag3PO4的制备及紫外光降解染料废水性能

Da-jun LI,Hui HE, Li ZHOU

Applied Chemical Industry(2017)

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Abstract
以AgNO3、NaHCO3、NaH2PO4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/Ag3PO4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/Ag3PO4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/Ag3PO4对ST基本无吸附作用.紫外光催化机理实验表明,(·O2-)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.
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