负载纳米光催化剂对双极性脉冲放电水处理效果的影响
首发时间:2011-09-19
摘要:在双脉冲放电等离子体水处理过程中,不仅可以产生具有低温等离子体的化学效应,还会伴有光辐射等物理效应,而光催化剂可以利用这部分的光辐射能量。为此本文重点研究了在气液固三相混合体双极性脉冲放电条件下添加光催化剂对于有机污染物降解所起到的作用。利用溶胶-凝胶法制备负载型的纳米TiO2光催化剂,选择典型的染料废水靛蓝二磺酸钠(IDS)作为处理对象,检验其对于染料废水降解的催化处理效果。实验结果表明:当固相的玻璃珠上负载了纳米TiO2光催化剂时,IDS溶液的降解效率有了一定程度的提高,在电压为30kV、气量为1.0m3/h的条件下,放电处理3min就可以使IDS完全降解褪色。
关键词: 双极性脉冲 放电 水处理 光催化剂 气液固三相混合体
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Effect of Photocatalyst in Water Treatment by Bipolar Pulsed Discharge
Abstract:In the process of water treatment by bipolar pulsed discharge plasma, there is not only the chemical effect such as the cold plasma, but also the physical effect such as the optical radiation. The energy of the optical radiation can be used by photocatalyst. Therefore, the effect of the photocatalyst to the degradation of the organic pollutant was investigated using a packed bed reactor by bipolar pulsed discharge in the air-liquid-solid mixture. The loaded nanoparticle TiO2 photocatalyst was obtained using the sol-gel method and the typical dye solution Indigo Carmine(IDS)was chosen as the degradation target to test the catalytic effect of the nanoparticle TiO2 photocatalyst. Experiment results proved that the degradation efficiency of the IDS solution increased by a certain extent. The IDS solution was totally decolorized within 3 min by bipolar pulsed discharge in the condition that the peak voltage was 30kV and the air flow was 1.0m3/h.
Keywords: bipolar pulse discharge water treatment photocatalyst air-liquid-solid mixture
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