Three-dimensional porous aerogel constructed by Bi2WO6 nanosheets and graphene with excellent visible-light photocatalytic performance
Three-dimensional porous aerogel constructed by Bi2WO6 nanosheets and graphene with excellent visible-light photocatalytic performance
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Bi2WO6纳米片和石墨烯构建的三维多孔气凝胶具有优异的可见光光催化性能
DOI：
10.1016/j.matlet.2016.05.031
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发表时间：
2016-09
影响因子：
3
通讯作者：
Zhoucheng Wang
中科院分区：
文献类型：
--
作者：
Xun Xu;Fangwang Ming;Jinqing Hong;Yaqiang Xie;Zhoucheng Wang
通过简单的溶剂热路线制备了 Bi2WO6 纳米片和石墨烯的三维多孔杂化气凝胶组件。产品通过X射线衍射、扫描电子显微镜、透射电子显微镜等进行表征。结果显示杂化气凝胶中石墨烯和 Bi2WO6 纳米片堆叠的高度互连的多孔网络微观结构。混合气凝胶的比表面积 (39.4 m2g−1) 比 Bi2WO6 纳米片高 1.6 倍。复合气凝胶的罗丹明 B 去除率在 45 分钟内达到 99.6%，高于纯 Bi2WO6 纳米片 (80%)。优异的光催化性能主要归功于气凝胶的多孔结构和石墨烯的高导电性。光催化机理研究表明O2−•是罗丹明B降解的主要反应物种。
A three-dimensional porous hybrid aerogel assembly of Bi2WO6nanosheets and graphene has been prepared by a facile solvothermal route. The products are characterized by X-ray diffraction, Scanning electron microscope, Transmission electron microscopy, and so on. The results show the highly interconnected and porous network microstructure stacked by graphene and Bi2WO6nanosheets in the hybrid aerogel. The specific surface area of hybrid aerogel (39.4 m2g−1) is 1.6 times higher than that of Bi2WO6nanosheets. The Rhodamine B removal ratio over the composite aerogel reaches up to 99.6% within 45 min, which is higher than that of pure Bi2WO6nansosheets (80%). The excellent photocatalytic performance is mainly owing to the porous structure of aerogel and high electrical conductivity of graphene. The study on the photocatalytic mechanism demonstrates that O2−• is the main reactive species for Rhodamine B degradation.
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