Facile construction of a hierarchical Bi@BiOBr-Bi2MoO6 ternary heterojunction with abundant oxygen vacancies for excellent photocatalytic nitrogen fixation
Facile construction of a hierarchical Bi@BiOBr-Bi2MoO6 ternary heterojunction with abundant oxygen vacancies for excellent photocatalytic nitrogen fixation
复制标题
轻松构建具有丰富氧空位的分层Bi@BiOBr-Bi2MoO6三元异质结，具有优异的光催化固氮作用
DOI：
10.1039/d1se00178g
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发表时间：
2021
影响因子：
5.6
通讯作者：
Zhang Xiufang
中科院分区：
文献类型：
--
作者：
Lan Meng;Zheng Nan;Dong Xiaoli;Ren Xiaolei;Wu Jiaxin;Ma Hongchao;Zhang Xiufang
通过简单的两步溶剂热策略成功制备了新型Bi@BiOBr–Bi2MoO6三元异质结构光催化剂，其呈现出约200 nm的均匀球形结构。通过 XRD、XPS、SEM、TEM 和 DRS 对 Bi@BiOBr–Bi2MoO6 的组成、形貌和光捕获性能进行了表征。正如预期的那样，所制备的异质结在没有任何牺牲剂的情况下在水中的固氮方面表现出非凡的光催化活性。结果表明，优化后的Bi@BOB–BMO-2样品具有167.2 μmol g−1 h−1的优异NH4+产率，比纯Bi2MoO6和Bi@BiOBr高2.5和2.1倍。还研究了电子清除剂对 NH4+ 生成速率和 Bi@BOB–BMO-2 稳定性的影响，结果令人满意。这项研究提供了一种有前景的策略，可以设计出在温和条件下具有出色固氮性能的优异模拟太阳光驱动异质结光催化剂。
Novel Bi@BiOBr–Bi2MoO6 ternary heterostructure photocatalysts were successfully prepared by a facile two-step solvothermal strategy, which presents a uniform spherical structure with around 200 nm. The composition, morphology and light-harvesting properties of Bi@BiOBr–Bi2MoO6 were characterized by XRD, XPS, SEM, TEM and DRS. As expected, the as-prepared heterojunction exhibits extraordinary photocatalytic activity for nitrogen fixation in water without any sacrificial agent. The results reveal that the optimized Bi@BOB–BMO-2 sample has an excellent NH4+ yield rate of 167.2 μmol g−1 h−1, which is 2.5 and 2.1 times higher than that of pure Bi2MoO6 and Bi@BiOBr. The effect of an electron scavenger on the rate of NH4+ production and the stability of Bi@BOB–BMO-2 was also investigated, and the results were desirable. This study provides a promising strategy to design superior simulated solar-light driven heterojunction photocatalysts with distinguished nitrogen fixation performance under mild conditions.