Hydrothermal synthesis of 3D Ba_5Ta_4O_15 flower-like microsphere photocatalyst with high photocatalytic properties
Hydrothermal synthesis of 3D Ba_5Ta_4O_15 flower-like microsphere photocatalyst with high photocatalytic properties
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DOI：
10.1557/jmr.2016.280
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发表时间：
2016-09
影响因子：
2.7
通讯作者：
Dongbo Xu;W. Shi;Chaoya Xu;Songbo Yang;Hongye Bai;Chengjie Song;Biyi Chen
中科院分区：
文献类型：
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作者：
Dongbo Xu;W. Shi;Chaoya Xu;Songbo Yang;Hongye Bai;Chengjie Song;Biyi Chen
通过水热条件下的碱性蚀刻合成了一种新型高效的三维（3D）Ba_5Ta_4O_15花状微球光催化剂。研究了反应温度、反应时间和碱浓度对3D Ba_5Ta_4O_15花状微球光催化剂形貌的影响。利用X射线衍射、扫描电子显微镜、透射电子显微镜和高分辨率透射电子显微镜对3D Ba_5Ta_4O_15的形貌和结构进行了表征。结果表明，优雅的花状结构由Ba_5Ta_4O_15纳米片组成。固态反应合成的3D Ba_5Ta_4O_15花状微球在紫外光降解亚甲基蓝方面表现出比块体Ba_5Ta_4O_15微晶更高的光催化活性。对Ba_5Ta_4O_15光催化剂的紫外可见漫反射光谱、光致发光光谱、体积吸附法和光电流响应进行表征表明，花状Ba_5Ta_4O_15微球具有较高的光催化活性，这是由于其高结晶度、大表面积和有效的电荷分离。
A novel and efficient photocatalyst of three dimensional (3D) Ba_5Ta_4O_15 flower-like microsphere was synthesized via an alkaline etch under hydrothermal condition. The influence of reaction temperature, reaction time, and alkaline concentration on the morphology were investigated for the 3D Ba_5Ta_4O_15 flower-like microsphere photocatalyst. The morphology and structure of the 3D Ba_5Ta_4O_15 were characterized using x-ray diffraction, scanning electron microscope, transmission electron microscope, and high-resolution transmission electron microscopy. The results show that the elegant flower-like structure was composed of Ba_5Ta_4O_15 nanosheets. The 3D Ba_5Ta_4O_15 flower-like microspheres show a higher photocatalytic activity in the degradation of methylene blue under ultraviolet light than the bulk Ba_5Ta_4O_15 microcrystal by the solid-state-reacted synthesized. The UV–vis diffuse reflectance spectra, photoluminescence spectra, volumetric adsorption method, and photocurrent response of the Ba_5Ta_4O_15 photocatalyst were characterized indicated that the higher photocatalytic activity of flower-like Ba_5Ta_4O_15 microspheres was due to the high crystallinity, large surface area and the effective charge separation.