催化学报

催化学报 ›› 2016, Vol. 37 ›› Issue (5): 711-719.DOI: 10.1016/S1872-2067(15)61078-6

• 论文 • 上一篇    下一篇

AgBr/Ag3PO4光催化降解染料的性能及其降解产物的生态毒性

Pongsaton Amornpitoksuka,c, Sumetha Suwanboonb,c   

  1. a 宋卡王子大学理学院化学系和化学杰出创新中心, 合艾, 宋卡, 90112, 泰国;
    b 宋卡王子大学理学院材料科学与技术系, 合艾, 宋卡, 90112, 泰国;
    c 宋卡王子大学能源纳米技术杰出中心, 合艾, 宋卡, 90112, 泰国
  • 收稿日期:2016-01-14 修回日期:2016-03-03 出版日期:2016-04-26 发布日期:2016-04-26
  • 通讯作者: Pongsaton Amornpitoksuk

Photocatalytic degradation of dyes by AgBr/Ag3PO4 and the ecotoxicities of their degraded products

Pongsaton Amornpitoksuka,c, Sumetha Suwanboonb,c   

  1. a Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, 90112 Thailand;
    b Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, 90112 Thailand;
    c Center of Excellence in Nanotechnology for Energy (CENE), Prince of Songkla University, Hat-Yai, Songkhla, 90112 Thailand
  • Received:2016-01-14 Revised:2016-03-03 Online:2016-04-26 Published:2016-04-26
  • Contact: Pongsaton Amornpitoksuk

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摘要：

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.

关键词: 磷酸银, 溴化银, 光催化降解, 一步合成, 生态毒性

Abstract:

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 Na3PO4solutions. The Ag3PO4 powders prepared from the precipitation solution with a pH of 6 showed the highest photocatalytic 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 activity 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 Chlorella vulgaris.

Key words: Silver phosphate, Silver bromide, Photocatalytic degradation, One-pot synthesis, Ecotoxicity