Fe2(MoO4)3 as an Effective Photo-Fenton-like Catalyst for the Degradation of Anionic and Cationic Dyes in a Wide pH Range

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• 作者：Shuanghong Tian ; Jialin Zhang ; Jun Chen ; Linjun Kong ; Jiang Lu ; Fuchuan Ding ; Ya Xiong
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：September 18, 2013
• 年：2013
• 卷：52
• 期：37
• 页码：13333-13341
• 全文大小：455K
• 年卷期：v.52,no.37(September 18, 2013)
• ISSN：1520-5045

文摘

The photocatalytic activity of Fe₂(MoO₄)₃ under visible light (位 > 400 nm) was evaluated by the degradation of Acid Orange II (AOII) and Methylene Blue (MB). This new catalyst is highly effective for the degradation of both dyes in H₂O₂/visible light system at neutral pH. One hundred mg/L of dyes was almost removed within 30 min. Compared to the results in the darkness, the rate constants fitted by a simple pseudo-first-order reaction for both dyes multiplied. MB degraded at a slightly lower rate than AOII under identical conditions due to different chemical structures. Particularly, a high photocatalytic activity of Fe₂(MoO₄)₃ was obtained in a wide pH range of 3.0鈥?.0 and thus acidification pretreatment was not necessary. The high catalytic activity could be attributed to the strong absorption of Fe₂(MoO₄)₃ in the visible-light region and in addition, the generation of reactive 路OH from H₂O₂ synergistically activated by both Fe³⁺ and MoO₄^2鈥?/sup>.