Superfine and closely-packed TiO₂/Bi₂O₃ lamination on graphene nanoplates with high photocatalytic activity

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• 作者：Shiyi Cao ; Chuansheng Chen ; Tiangui Liu ; Bin Zeng ; Xutao Ning ; Xiaohua Chen ; Xiaodi Xie ; Weiwei Chen
• 关键词：Bi2O3/TiO2 lamination ; Graphene ; Nanohybrids ; Photocatalytic property
• 刊名：Catalysis Communications
• 出版年：10 February, 2014
• 年：2014
• 卷：46
• 期：Complete
• 页码：61-65
• 全文大小：1095 K

文摘

Graphene/TiO₂-Bi₂O₃ nanohybrids were synthesized by one-step PAA-assisted hydrothermal method with a low-temperature treatment. Their morphology, structure and photocatalytic property were investigated accordingly. The SEM and TEM results showed that the nanohybrids composed of TiO₂ and Bi₂O₃ nanoparticles with the size of about 10 nm were uniformly covered on the graphene sheets. Furthermore, the resultant samples presented excellent photocatalytic activity for RhB and recycle property, in which 95% RhB was degraded within 10 min and a good activity was maintained in the seven recycling tests, besides the hybrids also possess good activity in visible light. The enhancement of photocatalytic activity is attributed to efficient transfer of the photogenerated electrons from the CB of semiconductor nanoparticles to graphene and the homogeneity of nanoparticles.