Microwave assisted synthesis of sheet-like Cu/BiVO{sub 4} and its activities of various photocatalytic conditions

Journal Article · Tue Sep 15 04:00:00 EDT 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2015.05.026· OSTI ID:22486759

Chen, Xi ^[1]; Li, Li ^[1]; Yi, Tingting ^[2]; Zhang, WenZhi ^[1]; Zhang, Xiuli; Wang, Lili ^[2]

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1. College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006 (China)
2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006 (China)

The Cu/BiVO{sub 4} photocatalyst with visible-light responsivity was prepared by the microwave-assisted hydrothermal method. The phase structures, chemical composition and surface physicochemical properties were well-characterized via X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance absorption (UV–vis/DRS), scanning electron microscopy (SEM), and N{sub 2} adsorption–desorption tests. Results indicate that the crystal structure of synthetic composite materials is mainly monoclinic scheelite BiVO{sub 4}, which is not changed with the increasing doping amount of Cu. In addition, the presence of Cu not only enlarges the range of the composite materials under the visible-light response, but also increases the BET value significantly. Compared to pure BiVO{sub 4}, 1% Cu/BiVO{sub 4}-160 performs the highest photocatalytic activity to degrade methylene blue under the irradiation of ultraviolet, visible and simulated sunlight. In addition, the capture experiments prove that the main active species was superoxide radicals during photocatalytic reaction. Moreover, the 1% Cu/BiVO{sub 4}-160 composite shows good photocatalytic stability after three times of recycling. - Graphical abstract: A series of BiVO{sub 4} with different amounts of Cu doping were prepared by the microwave-assisted method, moreover, which performed the high photocatalytic activities to degrade methylene blue under multi-mode. - Highlights: • A series of Cu/BiVO{sub 4} with different amounts of Cu doping were prepared by microwave-assisted synthesis. • The morphologies of as-samples were different with the amount of Cu doping increased. • Compared with pure BiVO{sub 4}, as-Cu/BiVO{sub 4} showed stronger absorption in the visible light region obviously. • 1% Cu/BiVO{sub 4}-160 performed the high photocatalytic activities to degrade methylene blue under multi-mode. • OH{sup •} and h{sup +} both play important roles in the photocatalytic reaction.

• OSTI ID: 22486759
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 229; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ADSORPTION
BISMUTH COMPOUNDS
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
COPPER
DESORPTION
HYDROGEN IONS 1 PLUS
HYDROTHERMAL SYNTHESIS
HYDROXIDES
IRRADIATION
METHYLENE BLUE
MICROWAVE RADIATION
MONOCLINIC LATTICES
PHOTOCATALYSIS
SCANNING ELECTRON MICROSCOPY
ULTRAVIOLET RADIATION
VANADATES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY