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超声-S/TiO2纳米颗粒可见光催化协同降解亚甲基蓝

Photocatalytic degradation of methylene blue by S doped TiO_2 nanoparticles in combination with ultrasound wave in visible light
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摘要 采用共沉淀-浸渍法制备掺杂S的TiO2光催化剂,利用XRD,TEM,UV-Vis-DRs,XPS等方法对其结构、元素组成和光谱学特征进行研究,以亚甲基蓝(MB)的光催化降解反应为模型,探讨高效利用可见光降解亚甲基蓝的反应体系。实验结果表明,S掺杂最佳热处理温度为500℃。掺杂光催化剂晶型仍为锐钛矿型,其粒径变小,比表面积增大,热稳定性增加,对可见光的吸收增强。超声波对光催化降解反应有协同作用,S/TiO2在可见光下对亚甲基蓝的降解率明显高于纯TiO2。 S Doped TiO2 nanoparticles were successfully synthesized by coprecipitation-impregnation method. The characteristics of spectroscopy, elemental composition and crystal structure were investigated by XPS, UV-Vis-DRs,TEM and XRD. Using the reaction of photocatalytic degradation of methylene blue (MB) as a model reaction, its reaction system was investigated utilizing visible light effectively. Experimental results indicate that the optimized heat treatment temperature of S doping is 500 ℃. Compared to TiO2, the crystal form of the S doped TiO2 is still anatase form, smaller particle diameter, larger specific surface area, increased thermostability, and enhanced absorption of visible light. With the synergistic effect of ultrasound wave on photocatalytic degradation, the photocatalytic degradation rate of MB is obviously higher than TiO2 itself in visible light.
出处 《应用化工》 CAS CSCD 2009年第1期32-34,共3页 Applied Chemical Industry
基金 湖南省自然科学基金项目资助(06JJ4011) 衡阳市科技局项目资助(2007KS03)
关键词 亚甲基蓝 S掺杂 表征 超声 光催化降解 methylene blue S doped characterization ultrasound photocatalytic degradation
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