当前位置: X-MOL 学术J. Solid State Chem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Facile preparation of ultrathin Bi2MoO6 nanosheets for photocatalytic oxidation of toluene to benzaldehyde under visible light irradiation
Journal of Solid State Chemistry ( IF 3.2 ) Pub Date : 2018-09-18 , DOI: 10.1016/j.jssc.2018.09.027
Kai Cai , Si-Yuan Lv , Lu-Na Song , Lang Chen , Jie He , Peng Chen , Chak-Tong Au , Shuang-Feng Yin

Bi2MoO6 nanosheets different in thickness (~6 nm, ~15 nm and ~120 nm) were facilely prepared by hydrothermal and solvothermal methods. They were tested as photocatalysts for selective oxidation of toluene to benzaldehyde in the presence of O2 and under visible light irradiation. It was found that the photocatalytic activity is closely related to the thickness of Bi2MoO6 nanosheets. Apparently, thinner nanosheets could induce higher photocatalytic activity. Among them, the ultrathin Bi2MoO6 nanosheets (about 6 nm in thickness) which were prepared by a simple solvothermal method using MoO3 rods as precursor and ethylene glycol as solvent showed the highest activity (toluene conversion 12.7% and benzaldehyde production rate 778 μmol/g/h). The excellent activity is ascribed to the ultrathin sheet-like structure that facilitates efficient separation and transfer of charge carriers. Holes was found to be the main active species. Based on the controlled experiment and active species trapping results, a possible reaction mechanism was proposed.



中文翻译:

可见光照射下甲苯光催化氧化制苯甲醛超薄Bi 2 MoO 6纳米片的简便制备

通过水热和溶剂热方法容易地制备了厚度不同(〜6 nm,〜15 nm和〜120 nm)的Bi 2 MoO 6纳米片。在O 2的存在下和可见光照射下,将它们用作光催化剂将甲苯选择性氧化为苯甲醛的光催化剂。发现光催化活性与Bi 2 MoO 6纳米片的厚度密切相关。显然,更薄的纳米片可以诱导更高的光催化活性。其中,通过使用MoO 3的简单溶剂热法制备的超薄Bi 2 MoO 6纳米片(厚度约6 nm)。以棒为前驱体和以乙二醇为溶剂显示出最高的活性(甲苯转化率为12.7%,苯甲醛产率为778μmol/ g / h)。优异的活性归因于超薄片状结构,该结构有助于电荷载流子的有效分离和转移。发现孔是主要的活性物种。基于控制实验和活性物质捕获结果,提出了可能的反应机理。

更新日期:2018-09-20
down
wechat
bug