Fabrication of BiVO4/ reduced graphene oxide photocatlyst for hexavalent chromium reduction under visible region
Fabrication of BiVO4/ reduced graphene oxide photocatlyst for hexavalent chromium reduction under visible region
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DOI：
10.1016/j.matpr.2021.11.381
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
V. Balakumar;Chitiphon Chuaicham;K. Sasaki;K. Sekar
中科院分区：
文献类型：
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作者：
V. Balakumar;Chitiphon Chuaicham;K. Sasaki;K. Sekar
钒酸铋（BiVO 4）作为可见光光催化剂被广泛用于去除水溶液中的有机和无机污染物。在BiVO 4中加入少量的石墨烯氧化物，由于其高的电荷传输和分离能力，显著提高了可见光区的光催化活性。在此，我们设计了BiVO 4在还原氧化石墨烯（rGO）光催化剂通过简单的溶液相法合成。采用硝酸铋、偏钒酸铵和氢氧化铵以及聚乙二醇作为稳定剂制备了BiVO 4纳米晶纳米片。所得的光催化催化剂显示出优异的活性对Cr（VI）去除（作为模型无机污染物）在可见光下，这是证明与光电化学研究。在可见光下，BiVO 4/rGO对Cr（VI）的光催化活性明显高于BiVO 4。此外，通过光电化学和光电性能证实了催化剂的效率。
Bismuth vanadate (BiVO4) is widely used as a visible light photocatalyst for elimination of organic and inorganic pollutants in aqueous solution. An integration with few layer graphene oxide into BiVO4, significantly enhance the photocatalytic activity in the visible region due to it’s high charge transport and separation. Herein, we have designed BiVO4on reduced graphene oxide (rGO) photocatalyst synthesised via simple solution phase method. BiVO4nanocrystals nanoplates were fabricated using bismuth (III) nitrate, ammonium metavanadate with ammonium hydroxide, and polyethylene glycol as a stabilising agent. The resulting photocatalytic catalyst showed an excellent activity towards Cr(VI) removal (as a model inorganic pollutant) under visible light, which is evidenced with photoelectrochemical studies. The photocatalytic performance for Cr(VI) removal rates over BiVO4/rGO showed much higher activity than BiVO4in visible light. Furthermore, the catalyst efficiency was confirmed through photoelectrochemical, and optoelectronic properties.