Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (5): 1247-1256.doi: 10.3866/PKU.WHXB201602231

• ARTICLE • Previous Articles     Next Articles

Phase Transformation and Photocatalytic Properties of Bi2O3 Prepared Using a Precipitation Method

Guo LIU1,Yuan-Yuan LU1,Jing ZHANG1,*(),Zhi LI2,*(),Zhao-Chi FENG3,Can LI3   

  1. 1 School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China
    2 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
    3 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China
  • Received:2015-11-19 Published:2016-05-07
  • Contact: Jing ZHANG,Zhi LI E-mail:jingzhang_dicp@live.cn;zhili@126.com
  • Supported by:
    the National Natural Science Foundation of China(21573101);Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China(教外司留[2013]1792号);Natural Science Foundation of Liaoning Province, China(2014020107);Program for Liaoning Excellent Talents in University, China(LJQ2014041);Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences

Abstract:

A Bi(OH)3 precursor was prepared using a precipitation method using bismuth nitrate as a starting material and ammonia as the precipitation agent. Bi(OH)3 was then calcined at different temperatures and different time. X-ray diffraction (XRD), Raman spectroscopy, thermogravimetry (TG), scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectroscopy (UVVis DRS) were used to investigate the phase transformation from Bi(OH)3 to Bi2O3 and the particle size, morphology, and optical properties of Bi2O3 during the phase transformation. It was found that Bi(OH)3 after calcination undergoes the following process: Bi(OH)3→Bi5O7NO3β-Bi2O3/Bi5O7NO3β-Bi2O3/Bi5O7NO3/α-Bi2O3α-Bi2O3. It was observed that the above phase transformation from Bi(OH)3 to Bi2O3 and the growth of the particle size are interrelated. It was also found that the phase transition from β-Bi2O3 to α-Bi2O3 was faster compared with the phase transition from Bi5O7NO3 to β-Bi2O3. Also, the degradation of Rhodamine B (RhB) was studied to investigate and compare the photocatalytic performance of Bi2O3 with different crystalline phases. The result indicates that Bi5O7NO3 and β-Bi2O3 exhibit excellent photocatalytic performance, while α-Bi2O3 has a low photocatalytic activity.

Key words: Bi5O7NO3, β-Bi2O3, α-Bi2O3, Bismuth oxide, Precipitation method, Phase transformation

MSC2000: 

  • O643.3