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采用水热法结合H2SO4浸泡处理成功合成了SO42-/Bi2O3可见光催化材料,并采用XRD、TG-DTA和UV-Vis等对合成产物的物相结构、热化学性能、光吸收性能以及可见光催化性能进行了研究,对H2SO4浸泡工艺条件对产物的可见光催化性能的影响进行了探讨。研究表明,水热合成产物为α-Bi2O3、Bi2O4和Bi2O2CO3的混合物,其中α-Bi2O3为主要成分;H2SO4浸泡处理并未改变产物的物相结构,但经H2SO4浸泡处理后产物的光催化性能得到了显著的提高,并且H2SO4浸泡工艺条件对产物的光催化活性有着重要的影响。在实验范围内,在浓度为0.5mol·L-1的H2SO4溶液中浸泡75min,再经700℃热处理4h可制备出具有较佳光催化活性的产物,经75min可见光的照射后对甲基橙溶液的光催化脱色率可达93.1%。
The SO42- / Bi2O3 visible light catalytic materials were successfully synthesized by hydrothermal method combined with H2SO4 soaking. The phase structure, thermochemical properties, light absorption properties and visible light catalytic properties of the synthesized products were characterized by XRD, TG-DTA and UV-Vis The effects of H2SO4 immersion conditions on the visible light photocatalytic performance of the product were discussed. The results show that the hydrothermal synthesis product is a mixture of α-Bi2O3, Bi2O4 and Bi2O2CO3, in which α-Bi2O3 is the main component. H2SO4 soaking does not change the phase structure of the product, but the photocatalytic performance of the product after H2SO4 soaking A significant improvement, and H2SO4 soaking process conditions on the photocatalytic activity has an important impact. In the experimental range, the product with good photocatalytic activity was prepared by immersing in H2SO4 solution with a concentration of 0.5 mol·L-1 for 75 min and then heat-treating at 700 ° C for 4 h. After exposure to visible light for 75 min, methyl orange solution The photocatalytic decolorization rate of up to 93.1%.