Microwave and Tween-80 Assisted Hydrothermal Synthesized of BiVO₄ and its Improved Photo Catalytic Activity under Visible Light

Abstract:

Monoclinic BiVO₄ nanosheets were successfully synthesized by the microwave hydro-thermal method in a relatively short time with TW-80(C₆₄H₁₂₄O₂₆-80) acted as the soft template. The effect of pH, synthesizing time on the morphology, and dosage of TW-80 were investigated in detail. The crystal form, morphology and absorption spectrum of the as prepared BiVO₄ samples were characterized by means of x-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy (DRS) respectively. The experimental results demonstrated that the samples synthesized both under acid and neutral environment showed the higher photo-catalytic activity. Up to 98% of MB was degraded in 300 minutes. The certain amount of TW-80 added in synthesizing BiVO₄ altered the morphology, resulted in the appearance of more active sites, shortened the transmittance distance of the carriers and thus enhanced photo-induced electrons separation efficiency.

• Periodical: Materials Science Forum (Volume 847)
• Pages: 234-240
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.847.234
• Online since: March 2016
• Authors: Tao Yu Qiu, Qing Ge Feng, De Jiang Liu, Xin Ye Wang
• Keywords: Microwave, Monoclinic BiVO₄ , TW-80

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