Facile construction of reduced graphene oxide supported three-dimensional polyaniline/WO2.72 nanobelt-flower as a full solar spectrum light response catalyst for efficient photocatalytic conversion of bromate
Facile construction of reduced graphene oxide supported three-dimensional polyaniline/WO2.72 nanobelt-flower as a full solar spectrum light response catalyst for efficient photocatalytic conversion of bromate
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轻松构建还原氧化石墨烯负载的三维聚苯胺/WO2.72纳米带花作为全太阳光谱光响应催化剂，用于高效光催化转化溴酸盐
DOI：
10.1016/j.chemosphere.2019.02.001
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发表时间：
2019
期刊：
影响因子：
8.8
通讯作者：
Zhang Yongqing
中科院分区：
文献类型：
--
作者：
Zhao Xuesong;You Yingying;Huang Shaobin;Cheng Fangqin;Chen Pengfei;Li Han;Zhang Yongqing
溴酸盐作为饮用水处理过程中的一种致癌副产物，已引起全球对环境和健康危害的关注，迫切需要有效的处理方法。采用溶剂挥发法制备了一种新型的还原氧化石墨烯负载聚苯胺/WO 2. 72纳米带-花（RGO/PANI/WO 2. 72）三元复合材料，用于溴酸盐的光催化还原。对所制备的样品进行了表征，探讨了溶液pH、离子和溶解氧对溴酸盐还原的影响。正如预期的那样，在WO2.72上引入RGO和PANI对光生载流子的分离表现出很好的协同效应。RGO/PANI/WO2.72的还原速率常数约为纯WO2.72的6倍。特别是在250-2500 nm范围内具有较强的光吸收，在全太阳光谱能量利用方面表现出优异的催化性能。在循环实验中，RGO/PANI/WO 2. 72具有稳定的光催化活性。从整体上考虑，本研究为溴酸盐催化还原过程中多相结构的合理构建提供了一种有价值的途径。
As a carcinogenic byproduct in drinking water treatment, bromate has raised global concerns on environmental and health hazard, calling for effective treatments. In the current work, a novel reduced graphene oxide supported polyaniline/WO2.72nanobelt-flower (RGO/PANI/WO2.72) ternary composite was prepared through a solvent volatilization method for photocatalytic reduction of bromate. The prepared sample was characterized, and the influence of aqueous pH, ions and dissolved oxygen on the bromate reduction was explored. As expected, the introduction of RGO and PANI on the WO2.72exhibited great synergistic effects on the separation of photogenerated carriers. The calculated reduction rate constant of RGO/PANI/WO2.72was about six times as high as that of pure WO2.72. Specially, the prepared photocatalyst possessed strong optical absorption in a broad range of 250–2500 nm, and thus displaying excellent catalytic performance in utilization of all solar spectrum energy. Moreover, the RGO/PANI/WO2.72exhibited stable photocatalytic activity in cycling test. Considered holistically, the present study offered a valuable approach for rational construction of heterogeneous structure in the development of bromate-catalyzed reduction.