Preparation and Photocatalytic Activity of Pb2+- SiO2-TiO2 Composite Catalyst
Pb2+-SiO2-TiO2(Hereinafter referred to as PST) composite catalysts were prepared by sol-gel method from tetrabutyl titanate(TBOT),tetraetethyl orthosilicate(TEOS) and lead nitrate. Properties of the catalyst were characterized by means of XRD and FT-IR. In addition, the photocatalytic activities of Pb2+ doped silicon-titanium composite samples were evaluated by the result of photocatalytic degradation of methyl orange as a model reaction under simulated sunlight.The results have been showed that the optimum Pb2+ doping concentration is 1.5% and the optimum heat treatment temperature is 500°C. Photocatalytic degradation conversion of methyl orange (10 mg/L) on PST catalyst could reach above 90.0% under simulated sunlight for 3h.
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
Z. M. Qiu et al., "Preparation and Photocatalytic Activity of Pb2+- SiO2-TiO2 Composite Catalyst", Advanced Materials Research, Vols. 287-290, pp. 1636-1639, 2011