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Citation: WANG Min, YANG Chang-Xiu, ZHENG Hao-Yan, LANG Hong-Xia, BAO Qi, SONG Wan-Yi, SONG En-Jun. Effect of pH value on Morphology and Visible-light Photocatalytic Performance of Bi2MoO6 Crystallites[J]. Chinese Journal of Inorganic Chemistry, ;2015, (2): 309-316. doi: 10.11862/CJIC.2015.055 shu

Effect of pH value on Morphology and Visible-light Photocatalytic Performance of Bi2MoO6 Crystallites

  • 1.

    College of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China

  • Corresponding author: WANG Min, 
  • Received Date: 30 September 2014
    Available Online: 3 November 2014

    Fund Project: 国家自然科学基金青年基金(No.21207093) (No.21207093)辽宁省高等学校优秀人才支持计划(No.LJQ2014023) (No.LJQ2014023)沈阳理工大学创新创业训练项目(No.14hh014)资助. (No.14hh014)

  • The Bi2MoO6 crystallites were synthesized by a simple hydrothermal method using (NH4)6Mo7O24·4H2Oand Bi(NO3)3·5H2O as source materials and the effect of the pHvalue was studied on preparation of Bi2MoO6 crystallites. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), low temperature nitrogen adsorption-desorption, X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The results show that the pHvalue has great influence on the phase composition, morphology and photocatalytic performance of Bi2MoO6 crystallites. Pure Bi2MoO6 is obtained with pHvalues of 1 to 7 and Bi3.64Mo0.36O6.55 is produced when the pHvalue is 9 or 11. The morphology of Bi2MoO6 can be controlled from nanorods, nanosheets to nanoparticles by adjusting the pHvalue. The photocatalytic activity under visible light (λ≥420 nm) and the effect of the pHvalue on the activity were evaluated using photocatalytic degradation of the Rhodamine B (RhB). The results indicate that the highest photocatalytic activity is obtained with the pHvalue of 7. Under visible light irradiation, the degradation rate of 5 mg·L-1 RhBwithin 50 min is 85%.
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