Modification of Bi₂WO₆ composites with rGO for enhanced visible light driven NO removal

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• 作者：L. Wang ; B. Sun ; W. Wang ; L. Feng ; Q. Li and C. Li
• 刊名：Asia-Pacific Journal of Chemical Engineering
• 出版年：2017
• 出版时间：January/February 2017
• 年：2017
• 卷：12
• 期：1
• 页码：121-127
• 全文大小：341K
• ISSN：1932-2143

文摘

Bi₂WO₆-rGO composites were synthesized through hydrothermal method. Its visible-light-driven photocatalytic properties were evaluated by the oxidation of nitrogen monoxide, which exhibited significantly enhancement on the photocatalytic performance comparing with Bi₂WO₆. Bi₂WO₆–2% rGO showed the highest photocatalytic activity for NO removal. The enhanced photocatalytic activity can be attributed to the increased light absorption and more effective charge transportation and separation arisen from the strong chemical bonding between Bi₂WO₆ and rGO. The results on the effects of H₂O and SO₂ concentration to NO removal efficiency indicate that the activity of Bi₂WO₆–2% rGO composite was suppressed by the coexisting of SO₂ while promoted by H₂O. In addition, the reaction mechanism of the photocatalytic oxidation of NO to NO₂ was also discussed.