摘要
采用浸渍涂覆法制备了活性碳纤维(ACF)负载TiO2薄膜,研究了不同TiO2负载量时对丙酮的吸附-光催化降解性能,并与单独活性碳纤维吸附及光解丙酮的降解性能进行了对比。结果表明,不同TiO2负载量对丙酮的降解效果不同,负载量为4.9 mg.cm-2时,丙酮的降解率最高,接近100%,效果明显好于活性碳纤维吸附及单独紫外灯照射下丙酮的降解性能。研究了负载量为4.9 mg.cm-2时催化剂随丙酮浓度增大的降解效果,结果表明丙酮的浓度对催化效果影响不大,基本上都能被降解完全,但降解时间相对延长。同一催化剂随着使用次数的增加,催化效果逐渐下降,但经过红外线灯照射2 h之后活性可以恢复。
The activated carbon fiber （ACF） loaded titanium dioxide thin films was prepared by soak-lifting, and the adsorption and photocatalytic degradation of acetone under ACF loaded different dosage of titanium dioxide were studied. The performances of pure ACF and ultraviolet irradiation were also investigated for comparison. It was indicated that different dosage of titanium dioxide had different effects; the degradation efficiency of acetone reached the maximum value of about 100% within 120 min of the ultraviolet irradiation when the loading of titanium dioxide equalled to 4. 9 mg · cm^-2 , and the effect was clearly better than those of both the adsorption of pure ACF and ultraviolet irradiation. It was studied that the photocatalytic degradation of acetone with the increasing concentration of acetone when the loading of titanium dioxide equalled to 4.9 mg · cm^-2 ,and it was shown that concentration of acetone had little effect on the photocatalytic degradation of acetone, which could be eliminated completely with lengthened time. And the photocatalytic degradation efficiency of acetone gradually decreased with its use times, but its activity could be recovered after 2 hours＇ infrared irradiation.
出处
《化学与生物工程》
CAS
2007年第11期20-23,共4页
Chemistry & Bioengineering
基金
广东省科技计划资助项目(2004B10301010
2006B36702004)
关键词
活性碳纤维
二氧化钛
丙酮
光催化降解
activated carbon fiber
titanium dioxide
acetone
photocatalytic degradation
