Liu Xinjuan, Pan Likun, Li Jinliang, Yu Kai, Sun Zhuo
Engineering Research Center for Nanophotonics and Advanced Instrument, Department of Physics, Ministry of Education, East China Normal University, Shanghai 200062, China.
J Nanosci Nanotechnol. 2013 Jul;13(7):5044-7. doi: 10.1166/jnn.2013.7599.
Bi2O3 was successfully synthesized via microwave-assisted reaction of Bi2O3 precursor in aqueous solution using a microwave system. Their morphologies, structures and photocatalytic performances in the degradation of methylene blue (MB) were characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, photoluminescence spectroscopy and UV-vis absorption spectroscopy, respectively. The results show that Bi2O3 synthesized at pH value of 7 exhibits an optimal photocatalytic performance with the MB degradation rate of 76% at 240 min under visible light irradiation due to its higher visible light absorption and comparatively low electron-hole pair recombination.
通过使用微波系统在水溶液中对Bi2O3前驱体进行微波辅助反应，成功合成了Bi2O3。分别采用扫描电子显微镜、透射电子显微镜、能量色散X射线光谱、X射线衍射光谱、光致发光光谱和紫外可见吸收光谱对其在亚甲基蓝（MB）降解中的形貌、结构和光催化性能进行了表征。结果表明，在pH值为7时合成的Bi2O3表现出最佳的光催化性能，在可见光照射下240分钟时MB降解率为76%，这归因于其较高的可见光吸收和相对较低的电子-空穴对复合率。
