Preparation of Porous Titania Photo-catalyst from Industrial Titanyl Sulfate Solution via Hydrothermal Synthesis
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摘要: 以工业硫酸钛液为前驱体,采用水热法制备多孔二氧化钛,考察了煅烧时间对多孔二氧化钛结构和性能的影响。采用XRD、SEM、XPS、FT-IR和BET对样品进行表征,并以亚甲基蓝光催化降解体系评价其光催化活性。随着煅烧时间的延长多孔二氧化钛的光催化活性先增加后降低,其中以500℃煅烧1 h所得样品活性最佳,1 h对亚甲基蓝的降解率为88%,其比表面积61.49 m2/g,晶粒尺寸16.10 nm。Abstract: Porous TiO2 photo-catalyst is prepared via hydrothermal synthesis route from industrial titanyl sulfate solution,and the effects of calcination time on the structure and property of porous TiO2 are also investigated.The as-prepared samples are characterized by XRD,SEM,XPS,FT-IR and BET,and their photocatalytic activities are evaluated by photocatalytic degredation of methylene blue.As the increase of calcination time,the photocatalytic degradation rate increases at first and then gradually decreases.Porous titania calcined at 500℃ for 1 h shows a lowest photocatalytic activity,with a degradation rate of 88%,SBET of 61.49 m2/g and crystal size of 16.10 nm.
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