High-efficient one-pot synthesis of carbon quantum dots decorating Bi2MoO6 nanosheets heterostructure with enhanced visible-light photocatalytic properties
High-efficient one-pot synthesis of carbon quantum dots decorating Bi2MoO6 nanosheets heterostructure with enhanced visible-light photocatalytic properties
复制标题
高效一锅合成碳量子点装饰Bi2MoO6纳米片异质结构并增强可见光催化性能
DOI：
10.1016/j.jallcom.2017.06.130
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发表时间：
2017-11-05
影响因子：
6.2
通讯作者：
Zhou, Dan
中科院分区：
文献类型：
--
作者：
Sun, Chaoyang;Xu, Qiuhua;Zhou, Dan
本文报道了一锅法水热合成纳米异质结构碳量子点/Bi 2 MoO复合材料的方法。采用葡萄糖水热氧化法在Bi 2 MoO 6纳米片上原位合成并接枝碳量子点。为了进行比较研究，还通过相同的方法合成了碳量子点和Bi 2 MoO 6。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（UV-vis漫反射光谱）和拉曼光谱（拉曼光谱）对催化剂的结构和组成进行了表征。以罗丹明B（RhB）和亚甲基蓝（MB）为目标染料，在可见光照射下考察了催化剂的光催化活性。在可见光照射下，该复合材料对罗丹明B（RhB）和亚甲基蓝（MB）具有良好的光催化活性和稳定性。当Bi 2 MoO 6与葡萄糖的质量比为1：1时，复合材料对罗丹明B和亚甲基蓝的光催化降解活性最高。提出了CQDs/Bi 2 MoO 6光催化材料的电荷转移和降解机理，以理解光催化剂结构与性能之间的关系。本工作提出了一种新的方法来制备CQDs修饰的Bi 2 MoO 6，使用一个简单的方法，这提供了一个新的见解的设计和先进的光催化剂的能源和环境应用。(C)2017爱思唯尔B. V.保留所有权利。
In this study, we reported a one-pot hydrothermal synthesis method for the preparation of nano-heterostructured composite carbon quantum dots (CQDs)/Bi2MoO. Carbon quantum dots were in-situ synthesized and grafted onto Bi2MoO6 nanosheets via hydrothermal oxidation of glucose. For comparison studies, carbon quantum dots and Bi2MoO6 were also synthesized by the same way. The structures and compositions of the photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy and Raman spectroscopy. The photocatalytic activity of the photocatalysts was evaluated by degradation of Rhodamine B (RhB) and methylene blue (MB) under visible light irradiation. The resulting (CQDs)/Bi2MoO6 composites possess excellent photocatalytic activity and stability towards the degradation of Rhodamine B (RhB) and methylene blue (MB) in aqueous solution under visible light irradiation. When the mass ratio of Bi2MoO6 to glucose is 1: 1, the composite showed the highest photocatalytic activity for RhB and MB degradation. A possible charge transfer and the degradation mechanism of CQDs/Bi2MoO6 materials were proposed to understand the relationship between structure and performance of the photocatalysts. The present work proposed a new method for the preparation of CQDs modified Bi2MoO6 using a facile method, which provided a new insight into the design and fabrication of advanced photocatalyst for energy and environmental application. (C) 2017 Elsevier B.V. All rights reserved.