具有优异太阳光下降解甲基橙性能的钛酸铋基材料
首发时间:2015-03-27
摘要:本文通过酸化和碳修饰,由钛酸铋Bi4Ti3O12(BTO)制备得到H+/BTO和C/BTO。采用XRD、N2吸附脱附、紫外可见漫反射光谱(UV-vis)、红外光谱(IR)及酸量滴定等手段对所得材料进行了较为详细的表征。结果表明,经过酸化和碳修饰之后的材料具有明显的2D纳米片结构,同时其酸性和比表面积以及在紫外光区的吸收都得到了较大幅度的提高。以甲基橙(MO)为模型污染物,考察了材料在太阳光下的光降解性能,发现经酸化和碳修饰后,材料的光降解性能得到了明显改善。其中,C/BTO具有最好的光降解性能,太阳光下30分钟内MO的降解率达到99%以上。
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Bismuth titanate-based materials with an excellent methyl orange photodegradation performance under sunlight
Abstract:Through acidification and carbon modification of bismuth titanate (Bi4Ti3O12, BTO), two BTO-based samples (H+/BTO and C/BTO) were prepared. Techniques such as XRD, N2 adsorption-desorption, UV-vis, FT-IR and acid capacity titration were used to characterize the obtained materials. It was found that the materials had a clear 2D nanosheet-structure and their surface area, acidity and UV absorption were greatly improved after acidification and carbon modification. By using methyl orange (MO) as a model pollutant, the photodegradation performance of the obtained materials was evaluated under sunlight irradiation. Compared with BTO, both H+/BTO and C/BTO had a much better photodegradation performance and C/BTO showed the best performance with 99% MO photodegraded in 30 min.
Keywords: bismuth titanate acidification carbon modification photodegradation methyl orange
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