Photodegradation of methyl orange by BiOI-sensitized TiO2
来源期刊：Rare Metals2012年第6期
论文作者：LI Huiquana, b, CUI Yumina, b, HONG Wenshana, HUA Linc, and TAO Donglianga a School of Chemistry and Chemical Engineering, Fuyang Normal College, Fuyang , China; b Anhui Provincial Key Laboratory for Degradation and Monitoring of Pollution of the Environment, Fuyang , China; c Research District Center, Singapore Linovus Technology Private Limited , Singapore
文章页码：604 - 610
摘 要：BiOI-sensitized titanium dioxide （TiO2） photocatalysts were prepared by a deposition method at room temperature and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller surface area measurements. The photocatalytic activities of the catalysts were evaluated for the degradation of methyl orange （MO） solution under UV and visible light irradiation. The effects of catalyst amount, initial pH value, initial concentration of MO, as well as KI amount were investigated. The repeatability of photocatalytic activity of the 1.7% BiOI/TiO2 catalyst was also tested. It is shown that BiOI sensitization enhances the photocatalytic activities of TiO2. With BiOI content increasing, the photocatalytic activities of BiOI/TiO2 under UV and visible light irradiation first increase, reaching a maximum around BiOI content of 1.7%, and then decrease with further increasing BiOI content. The 1.7% BiOI/TiO2 catalyst obviously exhibits much higher visible light photocatalytic activity than P25, and its UV light photocatalytic activity is slightly higher than that of P25. Under the conditions of a catalytic dose of 1.5 g.L-1, initial pH of 3.0, initial MO concentration of 20 mg.L-1, UV power of 300 W, and air flow rate of 0.8 L.min-1, complete degradatio is achieved within 60 min. The repeatability of photocatalytic activity of the 1.7% BiOI/TiO2 catalyst is highly reliable.
LI Huiquana, b, CUI Yumina, b, HONG Wenshana, HUA Linc, and TAO Donglianga a School of Chemistry and Chemical Engineering, Fuyang Normal College, Fuyang 236041, China; b Anhui Provincial Key Laboratory for Degradation and Monitoring of Pollution of the Environment, Fuyang 236041, China; c Research District Center, Singapore Linovus Technology Private Limited 059818, Singapore
摘 要：BiOI-sensitized titanium dioxide （TiO2） photocatalysts were prepared by a deposition method at room temperature and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller surface area measurements. The photocatalytic activities of the catalysts were evaluated for the degradation of methyl orange （MO） solution under UV and visible light irradiation. The effects of catalyst amount, initial pH value, initial concentration of MO, as well as KI amount were investigated. The repeatability of photocatalytic activity of the 1.7% BiOI/TiO2 catalyst was also tested. It is shown that BiOI sensitization enhances the photocatalytic activities of TiO2. With BiOI content increasing, the photocatalytic activities of BiOI/TiO2 under UV and visible light irradiation first increase, reaching a maximum around BiOI content of 1.7%, and then decrease with further increasing BiOI content. The 1.7% BiOI/TiO2 catalyst obviously exhibits much higher visible light photocatalytic activity than P25, and its UV light photocatalytic activity is slightly higher than that of P25. Under the conditions of a catalytic dose of 1.5 g.L-1, initial pH of 3.0, initial MO concentration of 20 mg.L-1, UV power of 300 W, and air flow rate of 0.8 L.min-1, complete degradatio is achieved within 60 min. The repeatability of photocatalytic activity of the 1.7% BiOI/TiO2 catalyst is highly reliable.
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