通过调节Na3PO4溶液中H3PO4的含量制得沉淀剂， AgNO3与此沉淀剂反应制得Ag3PO4粉末。当沉淀剂pH=6时，所制得的Ag3PO4粉末表现出最高的光催化降解甲基蓝和罗丹明B活性。进一步添加KBr溶液修饰Ag3PO4可制得AgBr/Ag3PO4粉末。该光催化剂可使阴离子染料(如活性橙和甲基橙)脱色。采用适当的捕获剂考察了参与光催化降解过程的活性物种的抑制活性。光催化反应之后，质谱检测证实染料降解为更小的分子。以Chlorella vulgaris为生物指示剂考察了处理前后染料的生态毒性。
Ag3PO4 powders were prepared through a precipitation reaction between AgNO3 and precipitating agent solutions that were prepared by adjusting the amount of H3PO4 in the Na3PO4 solutions. The Ag3PO4 powders prepared from the precipitation solution with a pH of 6 showed the highest photo‐catalytic activity for decolorizing the methylene blue and rhodamine B dyes. These Ag3PO4 powders were further modified by the addition of KBr solutions to obtain AgBr/Ag3PO4 powders and these photocatalysts can decolorize the anionic dyes as reactive orange and methyl orange. The reactive species involved in the photocatalytic degradation process were evaluated for their inhibitory activ‐ity using the appropriate scavengers. After photocatalysis, mass spectrometry confirmed that the dyes were degraded to smaller molecules. The ecotoxicities of the dye solutions before and after treatment were evaluated by studying their ability to inhibit the growth of the bioindicator Chlorel a vulgaris.
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