Photocatalytic Degradation of Azo Dye Reactive Orange 16 by TiO2
Photocatalytic Degradation of Azo Dye Reactive Orange 16 by TiO2
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DOI：
10.1007/s11270-009-9980-4
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发表时间：
2009-01
期刊：
影响因子：
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通讯作者：
Chih-Yu Chen
中科院分区：
文献类型：
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作者：
Chih-Yu Chen
研究了二氧化钛(TiO2光催化降解活性橙16)的性能。考察了光催化剂用量、RO16浓度、光强、温度等参数对光催化降解的影响。RO16水解物脱色后毒性降低(EC_(50)= 76.54 ± 2.16)。结果表明，反应20min脱色率为87%，反应80min脱色率为100%。20min后总矿化度为70%，120min后接近100%。结果表明，颜色的降解速度快于总有机碳的下降速度。光催化降解过程符合一级反应规律。最终矿化产物为乙酰胺，中间产物经气相色谱-质谱联用鉴定。
Photocatalytic degradation of hydrolyzed reactive orange 16 (RO16) using titanium dioxide (TiO2) was analyzed in our study. The effects of various parameters, such as photocatalyst amount, RO16 concentration, light intensity, and temperature on photocatalytic degradation were investigated. Decolorization of hydrolyzed RO16 resulted in an decreasing of toxicity (EC50= 76.54 ± 2.16). It was found that the decolorization efficiency was 87% after 20-min reaction and 100% after 80-min reaction. The total mineralization was 70% after 20 min and nearly 100% after 120 min, respectively. The results indicate that color degradation was faster than the decrease of total organic carbon. The photocatalytic degradation process was well described by first-order reaction. The final mineralization product was acetamide and the intermediate products were identified by gas chromatography–mass spectroscopy.