Engineering of Z-scheme 2D/3D architectures with Bi2MoO6 on TiO2 nanosphere for enhanced photocatalytic 4-nitrophenol degradation

Engineering of Z-scheme 2D/3D architectures with Bi2MoO6 on TiO2 nanosphere for enhanced photocatalytic 4-nitrophenol degradation
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TiO2 纳米球上 Bi2MoO6 的 Z 型 2D/3D 结构工程,用于增强光催化 4-硝基苯酚降解

DOI:
10.1016/j.jtice.2019.09.024
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发表时间:
2019-12
影响因子:
5.7
通讯作者:
Qifang Lu
Qifang Lu
中科院分区:
工程技术3区
文献类型:
--
作者:
Qian Yang;Enyan Guo;Hao Liu;Qifang Lu

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通过简单的两步水热法合成了一种新型的Z型Bi2MoO6纳米片/TiO2纳米球(BT)异质结,其中大量的Bi2MoO6纳米片均匀地生长在TiO2纳米球表面。得到的BT异质结构具有较高的比表面积和多孔结构,为光催化提供了丰富的活性中心。Bi2MoO6纳米片与TiO2纳米球之间的“线-面”协同效应使Z-型异质结具有较高的光生载流子转移效率和较长的光降解电子寿命。结果表明,与纯Bi2MoO6和TiO2光催化剂相比,所制得的BT光催化剂对水中4-硝基苯酚的光催化性能和循环稳定性均有较大提高。本工作中新颖的Z-方案结构的巧妙构建将为设计具有应用前景的光催化剂解决环境问题提供一条可行的途径。
A novel Z-scheme Bi2MoO6nanosheets/TiO2nanosphere (BT) heterojunction in which numerous Bi2MoO6nanosheets uniformly grow on the surface of TiO2nanospheres was synthesized through a simple two-step hydrothermal process. The resulting BT heterostructures possess high surface areas and porous structures, providing abundant active sites for photocatalysis. The “line-to-surface” synergistic effect between Bi2MoO6nanosheets and TiO2nanospheres endow the Z-scheme heterojunction with high transfer efficiency of photogenerated carriers and increased electron lifetime for photodegradation. As a result, the as-made BT photocatalysts present superier photocatalytic performance and excellent cyclic stability for the photodegradation of 4-nitrophenol in water than pure Bi2MoO6and TiO2. The smart construction of novel Z-scheme structure in this work would afford a plausible way for designing the promising photocatalysts to address environmental matters.
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