Abstract
Ag2CO3/CeO2 microcomposite was synthesized via chemical precipitation from pure CeO2 microspheres, AgNO3, and NaHCO3. X-ray diffraction, inductively coupled plasma optical emission spectroscopy, field emission scanning electron microscope, and high resolution transmission electron microscopy results confirmed the forming of Ag2CO3/CeO2 microcomposite. Field emission scanning microscope and high resolution transmission electron microscopy results of the as-synthesized Ag2CO3/CeO2 microcomposite revealed that Ag2CO3 particles were uniformly deposited on the surface of CeO2 microspheres (core). UV–vis diffuse reflectance spectra of both pure CeO2 and Ag2CO3/CeO2 microcomposite displayed a band gap edge at about 360−390nm. However, compared with pure CeO2, an additional broad tail from approximately 400nm to 800nm appeared in the UV–vis diffuse reflectance spectrum of Ag2CO3/CeO2 microcomposite. The photocatalytic studies indicated that the as-synthesized Ag2CO3/CeO2 microcomposite was promising photocatalyst in remediation of water polluted by some chemically stable azo dyes under visible light irradiation.
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