摘要:
以甲基橙为光催化降解对象, 研究了不同波长紫外灯与不同粒径TiO2组合 (365 nm紫外灯+10 nm TiO2, 365 nm紫外灯+50 nm TiO2, 254 nm紫外灯+10 nm TiO2, 254 nm紫外灯+50 nm TiO2) 光催化降解甲基橙的效果。结果表明, 不同波长紫外灯与不同粒径TiO2组合影响光催化降解甲基橙的效果。其中, 254 nm紫外灯+10 nm TiO2组合降解效果最好, 其次为254 nm紫外灯+50 nm TiO2组合, 再其次为365 nm紫外灯+10 nm TiO2组合, 降解效果最差的为365 nm紫外灯+50 nm TiO2组合。由此可见, 254 nm紫外灯+10 nm TiO2组合的光催化降解甲基橙的效果最好。
关键词:
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波长
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粒径
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TiO2
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光催化
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甲基橙
Abstract:
Taking methyl orange as degradation object, an experiment was carried out to study the effects of different wavelengths' UV lights and different particle sizes' TiO2 (365nm UV light+10nm TiO2, 365nm UV light +50nm TiO2, 254nm UV light +10nm TiO2, 254nm UV light +50nm TiO2) on degradation of methyl orange.Resultsshowed that the combination of different wavelengths' UV lights and different particle sizes' TiO2 affected the photocatalytic degradation of methyl orange.The best treatment effect was of the combination of 254nm UV light +10nm TiO2, and the degradation efficiencies of other treatments were in order of 254nm UV light +50nm TiO2, 365nm UV light+10nm TiO2 and 365nm UV light +50nm TiO2.It proved that 254nm UV light +10nm TiO2 was the optimal combination for photocatalytic degradation of methyl orange.
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