Microwave hydrothermal synthesis of calcium antimony oxide hydroxide with high photocatalytic activity toward benzene

Environmental Science & Technology
Meng SunXianzhi Fu

Abstract

A nanocrystalline CaSb2O5(OH)2 photocatalyst synthesized from CaCl2 and K2H2Sb2O7 was used to degrade benzene in the gas phase for the first time. The obtained sample was characterized by X-ray diffraction, N2 sorption-desorption, UV-vis diffuse reflectance spectroscopy, transmission electron microscopy, electron spin resonance, and X-ray photoelectron spectroscopy. The CaSb2O5(OH)2 sample had an average particle size of approximately 8 nm, a specific surface area of 101.8 m2 g(-1), and a band gap of 4.6 eV. Photocatalytic activity of the sample was mainly evaluated by the degradation of benzene in an O2 gas stream under ultraviolet light irradiation. The results demonstrated that the photoactivity of CaSb2O5(OH)2 was higher than that of commercial TiO2 (P25, Degussa Co.). In the photocatalytic degradation of benzene, it finally reached a steady conversion ratio of 29%. CaSb2O5(OH)2 has also exhibited activity toward other aromatic organic compounds. A possible mechanism of photocatalysis over CaSb2O5(OH)2 nanocrystals was proposed.

References

May 18, 2001·Environmental Science & Technology·H EinagaT Ibusuki
Oct 28, 2003·Inorganic Chemistry·Haviv GrisaruArie M Weiss
Jan 15, 2005·Angewandte Chemie·Jin-Song HuChun-Li Bai
Jun 17, 2008·Journal of Colloid and Interface Science·Tingjiang YanXianzhi Fu
Jun 26, 2008·Journal of the American Chemical Society·Aaron L Washington, Geoffrey F Strouse
Oct 23, 2008·Environmental Science & Technology·Jianhui HuangXianzhi Fu

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Citations

Feb 24, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Juan XuYongfa Zhu
Jun 29, 2010·Environmental Science & Technology·Chengsi Pan, Yongfa Zhu
Jul 4, 2012·Journal of the American Chemical Society·Dallas L MatzJeanne E Pemberton
Jun 16, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Shilei XieYexiang Tong

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