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采用等离子喷涂?化学气相沉积法制备Bi_2O3薄膜，并研究了沉积温度和热处理温度对于Bi_2O3薄膜形貌和成分的影响。用场发射扫描电子显微镜、X射线衍射仪、高分辨率透射电子显微镜对该薄膜形貌和成分进行了表征，通过紫外–可见光漫反射光谱仪研究了不同热处理温度下α/β-Bi_2O3禁带宽度的变化。结果表明：沉积温度和热处理温度影响Bi_2O3薄膜的微观形貌，同时影响α和β两相的相比例，但沉积温度的影响显著大于热处理温度；随着热处理温度升高，β相转化为α相的比例越来越高，α-Bi_2O3和β-Bi_2O3的禁带宽度都有所增加；最后，通过对甲基橙和双酚A的降解证明了Bi_2O3薄膜具有良好的光催化降解性能。
Abstract：To obtain easily recycled photocatalyst and improve the reusing practicability for waste water treatment,Bi_2O3 films were prepared by a plasma spray-chemical vapor deposition method,and the effects of deposition temperature and heat-treatment temperature on the morphology and phase composition of Bi_2O3 films were investigated.The morphology and composition of the films were characterized by field-emission scanning electron microscopy,X-ray diffraction and high-resolution transmission electron microscopy.The band gaps of α/β-Bi_2O3 at different heat treatment temperatures were determined by ultraviolet-visable diffuse reflectance spectrometry.The results show that the deposition temperature and heat-treatment temperature affect the microstructure of Bi_2O3 films and the proportion of α and β phases,while the influence of deposition temperature is more dominant rather than that of heat-treatment temperature.The proportion of β phase gradually converts to α phase and the band gap of α-Bi_2O3 and β-Bi_2O_3increases when the heat-treatment temperature increases.The Bi_2O3 films exhibit a good photocatalytic degradation performance for Methyl Orange and Bisphenol A.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20221089
中图分类号:O643.36;O644.1;TB383.2
引用信息:
[1]王振宇,刘燕才,陈琨,等.等离子喷涂-化学气相沉积制备α/β-Bi_2O_3薄膜的相结构调控和光催化降解性能[J].硅酸盐学报,2023,51(07):1800-1810.DOI:10.14062/j.issn.0454-5648.20221089.
基金信息:
徐州基础研究计划(KC21015); 国家自然科学基金面上项目(52175204); 江苏省大学生科研创新项目(202210290366H)
2023-05-29
2023-05-29
2023-05-29