Hydrothermal synthesis of 尾-ZnMoO₄ crystals and their photocatalytic degradation of Victoria Blue R and phenol

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• 作者：Yu-Rou Jiang^a ; Wenlian William Lee^b ; ^c ; Kung-Tung Chen^d ; Ming-Chien Wang^a ; Ken-Hao Chang^a ; Chiing-Chang Chen^a ; ^{ccchen@mail.ntcu.edu.tw" class="auth_mail} ; ^{ccchen@ms3.ntcu.edu.tw" class="auth_mail}
• 关键词：尾-ZnMoO4 ; Visible-light-responsive ; Photocatalytic ; Victoria Blue R ; Phenol
• 刊名：Journal of the Taiwan Institute of Chemical Engineers
• 出版年：January, 2014
• 年：2014
• 卷：45
• 期：1
• 页码：207-218
• 全文大小：3344 K

文摘

In this paper, the hydrothermal reaction with Na₂MoO₄路2H₂O and Zn(NO₃)₂路6H₂O as a precursor was investigated for the synthesis of 尾-ZnMoO₄ crystals. The 尾-ZnMoO₄ crystals were characterized by the X-ray diffraction (XRD), field emission scanning electronic microscopy-energy dispersive spectroscopy (FE-SEM-EDS), field emission transmission electronic microscopy-energy dispersive spectroscopy (FE-TEM-EDS), X-ray photoelectron (XPS), ultraviolet-visible (UV-vis), and Fourier transform infrared spectroscopy (FT-IR). Diffuse UV-vis spectra show that the 尾-ZnMoO₄ crystals have an indirect semiconductors with an optical bandgap of 2.48-2.69 eV. The photocatalytic efficiencies of powder suspensions were evaluated by measuring the Victoria Blue R (VBR) and phenol concentration. The as-prepared 尾-ZnMoO₄ crystals obtained at 280 掳C for 24 h showed the best photocatalytic activity for VBR under UV irradiation and showed the best photocatalytic activity for VBR and phenol under visible-light irradiation. This is the first study to reveal excellent activities of 尾-ZnMoO₄ crystals are a promising visible-light-responsive photocatalyst.