• 关键词：微波溶剂热法  γ-Bi₂MoO₆  氯胺磷  光催化

• 基金项目：河南省科技厅重点科技攻关项目(No. 142102210026)

• 叶红勇
• 南阳理工学院生物与化学工程学院, 南阳 473004

• 左广玲
• 南阳理工学院生物与化学工程学院, 南阳 473004

• 李入林
• 南阳理工学院生物与化学工程学院, 南阳 473004

• 摘要：采用微波溶剂热法制备了α-Bi₂Mo₃O₁₂和γ-Bi₂MoO₆可见光催化剂,并用XRD、SEM、和UV-Vis等测试手段表征了试样的结构和性能,最后以氯胺磷为目标降解物考察了它们的可见光催化降解性能.结果显示,在pH值较低时产物为α-Bi₂Mo₃O₁₂,pH较高时产物为γ-Bi₂MoO₆,并探讨了不同产物的形成机理.光催化实验结果表明,γ-Bi₂MoO₆的可见光催化活性优于α-Bi₂Mo₃O₁₂;在氯胺磷初始浓度较低时,γ-Bi₂MoO₆光催化降解过程符合零级动力学反应模型.在酸性或碱性条件下γ-Bi₂MoO₆对氯胺磷的降解效果优于中性条件.

• Abstract：Two kinds of visible-light-driven photocatalysts α-Bi₂Mo₃O₁₂ and γ-Bi₂MoO₆ were synthesized by microwave solvothermal technique. The as-prepared samples were characterized by XRD, SEM and UV-Vis. The results showed that at a low pH value α-Bi₂Mo₃O₁₂ was formed while at a high pH value γ-Bi₂MoO₆ was formed. The photocatalytic activities were examined by monitoring the degradation of chloramines phosphorus in an aqueous solution under solar light radiation. The results indicated that γ-Bi₂MoO₆ had a broader absorption band in the visible light region and therefore a better photocatalytic activity than α-Bi₂Mo₃O₁₂ under visible light radiation. The photocatalytic activities of γ-Bi₂MoO₆ were described here that under acidic and alkaline conditions, its degradation rates of chloramines phosphorus were higher than that under neutral condition. The kinetic study showed that at a low initial concentration of chloramines phosphorus, its degradation reaction was a zero-order reaction.

• Key words：microwave solvothermal technique  γ-Bi₂MoO₆  chloramines phosphorus  photocatalysis

• 
  摘要点击次数： 1218 全文下载次数： 3003