In situ fabrication of Bi2MoO6/Bi2MoO6-x homojunction photocatalyst for simultaneous photocatalytic phenol degradation and Cr(VI) reduction.
In situ fabrication of Bi2MoO6/Bi2MoO6-x homojunction photocatalyst for simultaneous photocatalytic phenol degradation and Cr(VI) reduction.
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DOI：
10.1016/j.jcis.2021.04.122
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发表时间：
2021-04
影响因子：
9.9
通讯作者：
Huidong Shen;F. Fu;Wenwen Xue;Xiaoxia Yang;S. Ajmal;Yanzhong Zhen;Li Guo;Danjun Wang;R. Chi-R.
中科院分区：
文献类型：
--
作者：
Huidong Shen;F. Fu;Wenwen Xue;Xiaoxia Yang;S. Ajmal;Yanzhong Zhen;Li Guo;Danjun Wang;R. Chi-R.
在本论文中，我们设计了一种新型的Bi 2 MoO 6/Bi 2 MoO 6-x异质结光催化剂，并通过一种简单的溶剂热煅烧方法成功地制备。实验表征表明，Bi 2 MoO 6/Bi 2 MoO 6-x异质结的形成是通过控制氧空位的形成而实现的。这种Bi 2 MoO 6/Bi 2 MoO 6-x异质结在可见光照射下表现出比纯Bi 2 MoO 6高约240倍的光催化活性。同样，对于苯酚和Cr（VI）共存的模型体系，Bi 2 MoO 6/Bi 2 MoO 6-x催化苯酚的光降解和Cr（VI）的还原同时发生，Bi 2 MoO 6/Bi 2 MoO 6-x同质结也表现出了上级的光催化活性，分别是纯Bi 2 MoO 6的4倍和8倍.其光催化活性的显著提高主要归因于同质结对光生电子/空穴的高效分离以及苯酚氧化和Cr（VI）还原之间的协同效应。因此，目前的见解提供了一个有效的策略，设计和制备高活性的光催化剂与纳入氧空位调制和应用于环境修复。
In this work, we designed a novel Bi2MoO6/Bi2MoO6-xhomojunction photocatalyst and successfully fabricated by a facile solvothermal-calcination approach. Experimental characterizations indicated that the formation of Bi2MoO6/Bi2MoO6-xhomojunction was caused by controlling oxygen vacancies formation. Such Bi2MoO6/Bi2MoO6-xhomojunction exhibits about 240 times higher photocatalytic activity towards phenol degradation as compared with pure Bi2MoO6under visible light irradiation. Similarly, for a co-existed phenol and Cr(VI) model system, Bi2MoO6/Bi2MoO6-x-catalyzed the photodegradation of phenol and the reduction of Cr(VI) simultaneously occur, and Bi2MoO6/Bi2MoO6-xhomojunction also displays a superior photocatalytic activity, that is 4 and 8 times higher than pure Bi2MoO6, respectively. The remarkably boosted photocatalytic activity could be attributed primarily to the highly efficient separation of photogenerated electrons/holes due to the homojunction and the synergistic effect between phenol oxidation and Cr(VI) reduction. Thus, the present insight provides an effective strategy for designing and preparing highly active photocatalysts with the incorporation of oxygen vacancies modulation and applying for environmental remediation.