硅酸盐学报2017，Vol.45Issue(4)：563-571,9.DOI:10.14062/j.issn.0454-5648.2017.04.17
HNO3浓度对水热合成Bi2WO6形貌及光催化性能的影响
Effect of HNO3 Concentration on Morphology and Photocatalytic Performance of Bi2WO6 Prepared by Hydrothermal Method
摘要
Abstract
Bi2WO6particles with various morphologies were prepared by a hydrothermal method. The effect of HNO3 concentration in the precursor solution on themorphology and photocatalytic performance of Bi2WO6 particles was investigated. The as-synthesized Bi2WO6 samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy, specific surface area measurement and UV-Vis diffuse reflection spectroscopy, respectively. The formation mechanism of Bi2WO6 particles was discussed. The photocatalytic activity of the Bi2WO6 was evaluatedvia the degradation of rhodamine B(RhB) under simulated sunlight (xenon lamp). The photocatalytic mechanism of Bi2WO6 was also analyzed. The results reveal that the phase composition and the crystal structure of Bi2WO6 hardly change, but the morphology and the photocatalytic efficiency of Bi2WO6 distinctly change when the concentration of HNO3 in the precursor solution varies. The as-prepared flower-like Bi2WO6 microspheres with 0.2 mol./L HNO3 in the precursor solution show the maximum photocatalytic activities, and the photodegradation efficiency is 82.75% within 120 min irradiation under simulated sunlight. Moreover, the sample is still stable after using for three recycles.关键词
水热法/钨酸铋/硝酸浓度/光催化Key words
hydrothermal method/bismuth tungstate/nitric acid concentration/photocatalysis分类
化学化工引用本文复制引用
朱圣,江向平,李菊梅,李小红,陈云婧..HNO3浓度对水热合成Bi2WO6形貌及光催化性能的影响[J].硅酸盐学报,2017,45(4):563-571,9.基金项目
国家自然科学基金(51562014,51262009) （51562014,51262009）
江西省教育厅项目(GJJ150933) （GJJ150933）
江西自然科学基金(20133ACB20002,20142BAB216009,20161BAB2016129) （20133ACB20002,20142BAB216009,20161BAB2016129）
江西省高等学校"先进陶瓷材料"科技创新团队、景德镇陶瓷大学研究生创新资金(JYC201515)资助项目. （JYC201515）
