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首页> 外文期刊>Separation and Purification Technology >Enhancement of sonocatalytic performance of TiO2 by coating Er~(3+):YAlO3 in azo dye degradation
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Enhancement of sonocatalytic performance of TiO2 by coating Er~(3+):YAlO3 in azo dye degradation

机译：通过涂覆Er〜（3 +）：YAlO3增强偶氮染料降解中TiO2的声催化性能

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In this work, the Er~(3+):YAlO3 as an up-conversion luminescence agent was prepared by sol-gel and auto-combustion method. And then the Er~(3+):YAlO3/TiO2 composite, a novel sonocatalyst, was successfully synthesized by sol-gel method. The key influences such as amount of coating Er~(3+):YAlO3, heat treatment temperature and heat treatment time on the sonocatalytic activity of Er~(3+):YAlO3/TiO2 composites, as well as the amount of Er~(3+):YAlO3/TiO2 on the sonocatalytic degradation of organic dye was studied. The results indicated that the sonocatalytic activity of TiO2 could be enhanced obviously by coating Er~(3+):YAlO3. When 1.0 g/L Er~(3+):YAlO3/TiO2 composite with 50 wt.% amount of coated Er~(3+):YAlO3 and mixed crystal of TiO2 film was adopted, the highest degradation efficiency was obtained. In addition, the effect of 1-butanol as ~·OH scavenger on the degradation was studied. It showed that the degradation of Acid red B was mainly caused by hydroxyl radical oxidation. Finally, the sonocatalytic degradation of some other organic dyes revealed that the Er~(3+):YAlO3/TiO2 composite was a widely useable sonocatalyst in treating various dye wastewaters.
机译：在这项工作中，通过溶胶-凝胶和自燃法制备了作为上转换发光剂的Er〜（3 +）：YAlO3。用溶胶-凝胶法成功合成了新型声催化剂Er〜（3 +）：YAlO3 / TiO2复合材料。 Er〜（3 +）：YAlO3的包覆量，热处理温度和热处理时间对Er〜（3 +）：YAlO3 / TiO2复合材料声催化活性以及Er〜（ 3 +）：YAlO3 / TiO2对有机染料的声催化降解研究。结果表明，涂​​覆Er〜（3 +）：YAlO3可以明显提高TiO2的声催化活性。当采用1.0g / L的Er〜（3 +）：YAlO3 / TiO2复合材料，其中Er〜（3 +）：YAlO3的涂覆量为50％（重量）和TiO2薄膜的混合晶体时，可获得最高的降解效率。另外，研究了1-丁醇作为〜·OH清除剂对降解的影响。结果表明，酸性红B的降解主要是由羟基自由基氧化引起的。最后，其他一些有机染料的声催化降解表明，Er〜（3 +）：YAlO3 / TiO2复合材料是用于处理各种染料废水的广泛使用的声催化剂。

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