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WO3 Quantum Dots Enhanced the Photocatalytic Performances of Graphene Oxide/TiO2 Films under Flowing Dye Solution
Inorganic Chemistry Communications ( IF 3.8 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.inoche.2020.107875
Chen Wang , Siyao Luo , Changyan Liu , Chuansheng Chen

Abstract It is maximal difficult for the application of powdery nanocatalyst in sewage treatment to retrieve powder catalyst from the reaction solution. In this paper, after synthesized graphene oxide/WO3 quantum dots/TiO2 (GOWT) composite with high catalytic performance under visible light, GOWT composite powder was used to fabricate GOWT films by using Al(H2PO4)3 as adhesive and cheap gauze as substrates, and studied the effect of Rhodamine B (RhB) concentration on the removal ability of GOWT film by evaluating flowing liquid of RhB. Experimental results show that GOWT films possess higher photocatalytic efficiency in contrast to graphene oxide/TiO2 (GOT) films under sunlight, and the degradation rate of RhB is 2.6 times as GOT films under UV light. Furthermore, GOWT film possess higher removal ability than GOT film under high concentration, but completely degrade RhB under flowing solution of low concentration, which is ascribed to the unique structure and superior performance of WO3 quantum dots. Besides, GOWT films have the potential application in sewage treatment without further contamination.

中文翻译:

WO3量子点增强了氧化石墨烯/TiO2薄膜在流动染料溶液下的光催化性能

摘要 粉状纳米催化剂在污水处理中的应用,从反应溶液中回收粉状催化剂的难度最大。本文在合成了在可见光下具有高催化性能的氧化石墨烯/WO3量子点/TiO2(GOWT)复合材料后,以Al(H2PO4)3为粘合剂,廉价的纱布为基材,使用GOWT复合粉末制备GOWT薄膜,并通过评估RhB的流动液体研究了罗丹明B(RhB)浓度对GOWT膜去除能力的影响。实验结果表明,与氧化石墨烯/TiO2(GOT)薄膜相比,GOWT薄膜在阳光下具有更高的光催化效率,并且在紫外光下对RhB的降解率是GOT薄膜的2.6倍。此外,在高浓度下,GOWT 膜比 GOT 膜具有更高的去除能力,但在低浓度流动溶液下完全降解RhB,这归功于WO3量子点的独特结构和优越性能。此外,GOWT 薄膜在污水处理中具有潜在的应用,而不会进一步受到污染。
更新日期:2020-05-01
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