UV/活性炭/TiO2光降解苯系物的动态测试研究

动态测试法能较好地模拟室内环境温度、相对湿度、空气交换及有害物释放速率等环境条件,能更真实可靠地反映净化材料在室内环境条件下对气态污染物的净化能力。本文通过动态测试法研究了UV/活性炭(AC)/TiO_2光降解苯系物的效率。系统地研究了紫外光直接氧化、AC吸附以及UV/AC/TiO_2光降解苯系物的净化能力,并考察了氧气、相对湿度对UV/AC/TiO_2降解活性的影响。结果表明,在254nm紫外光波长下,适度的氧气含量和湿度环境能显著提高UV/AC/TiO_2降解苯系物的活性。因此,动态测试法能对不同净化材料的净化效率和降解速率进行有效的评价,对建立科学的空气净化器的性能测试方法具有重要的意义。

Study on dynamical testing the photodegradation of benzene series by UV/active carbon/TiO2

The benzene series photodegradation of UV/active carbon/TiO2 has been carried?out through?dynamic testing methods?in?this?work. With the great simulation of room temperature, relative humidity, air exchange rate and harmful substances release rate and so on, the dynamic testing methods can more reliably reflect purification performance of scavenging materials in door. This work systematically investigated the UV oxidation efficiency of benzene series, the absorption of activated carbon and the photodegradation of UV/active carbon/TiO2. Moreover, the effects, such as O2 content and relative humidity, on the degradation efficiency of benzene of UV/active carbon/TiO2 has been discussed. The results indicated that the moderate O2 concentration and relative humidity can obvious enhance the degradation of benzene series under the 254 nm wavelength ultraviolet light. Thus, this dynamic testing methods could effectively evaluate the purification efficiency and degradation rate of different scavenging materials, and it has a vital significance for establishing methods which could estimate?the?property?of?air?cleaner.