Facile synthesis of Bi2MoO6/ZnSnO3 heterojunction with enhanced visible light photocatalytic degradation of methylene blue
Facile synthesis of Bi2MoO6/ZnSnO3 heterojunction with enhanced visible light photocatalytic degradation of methylene blue
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轻松合成 Bi2MoO6/ZnSnO3 异质结并增强可见光光催化降解亚甲基蓝
DOI：
10.1016/j.apsusc.2017.06.231
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发表时间：
2018-02-01
影响因子：
6.7
通讯作者：
Wang, Hui
中科院分区：
文献类型：
--
作者：
Liu, Yue;Yang, Zhao-Hui;Wang, Hui
本文通过溶剂热法（160℃，6小时）和退火处理（450℃，1小时）相结合的方法成功制备了可见光驱动的Bi₂MoO₆/ZnSnO₃（BMZ）复合光催化剂。采用包括X射线光电子能谱（XPS）、透射电子显微镜（TEM）、X射线衍射（XRD）、N₂吸附 - 脱附等温线（BET）、光致发光（PL）光谱和紫外 - 可见漫反射光谱（DRS）在内的系统表征方法对所得复合材料进行了进一步分析。研究了其在可见光照射下降解亚甲基蓝（MB）的光催化性能。显然，与纯Bi₂MoO₆和ZnSnO₃相比，BMZ复合光催化剂表现出更好的光催化性能。特别是，5 - BMZ复合材料的光催化活性最高，降解效率约为95%，分别比纯Bi₂MoO₆和ZnSnO₃高出1.27倍和7.31倍。其优异的光催化性能可能源于异质结的形成以及包括·O₂⁻和h⁺在内的活性物种的存在。最后，提出了一种提高光催化活性的可能的光催化机制。（C）2017年由爱思唯尔出版公司出版。
In this paper, visible-light-driven Bi2MoO6/ZnSnO3 (BMZ) hybrid photocatalysts were successful fabricated by a combined solvothermal (160 degrees C, 6 h) and annealing steps (450 degrees C, 1 h). Systematical characterization methods including X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), X-ray diffraction (XRD), N-2 adsorption-desorption isotherms (BET), photoluminescence (PL) spectroscopy and ultraviolet-visible diffuse reflection spectroscopy (DRS) were implemented to further analyze the obtained hybrids. The photocatalytic properties were investigated against degrading methylene blue (MB) under visible light irradiation. Obviously, BMZ hybrid photocatalysts displayed better photocatalytic performance compared with the bare Bi2MoO6 and ZnSnO3. Particularly, the highest photocatalytic activity was obtained by the 5-BMZ composite with the degradation efficiency of approximate 95%, which was up to 1.27 times and 7.31 times higher in comparison with pure Bi2MoO6 and ZnSnO3, respectively. The superior photocatalytic performances may be derived from the formation of heterojunction and presence of active species including center dot O-2(-) and h(+). Finally, a possible photocatalytic mechanism for improved photocatalytic activity was proposed. (C) 2017 Published by Elsevier B.V.