纳米氧化锌光催化涂料降解甲醛的研究

Study on nano-ZnO photocatalytic coating for degradation of formaldehyde

采用水热法制备纳米Zn O(氧化锌),并利用扫描电镜(SEM)、X-射线衍射(XRD)法等对其结构进行了表征。将自制的纳米Zn O引入光催化涂料中,并以暗箱内甲醛降解率为评价指标,着重探讨了纳米Zn O负载量、温度和湿度等对光催化涂料甲醛降解率的影响。研究结果表明:当紫外(UV)灯照射150 min、暗箱温度为25℃、暗箱中相对湿度为50%和纳米Zn O负载量为6 g时,光催化涂料的甲醛降解率>88%。

The nano-ZnO （nano-zinc oxide） was prepared by hydrothermal method, and its structure was characterized by scanning electron microscope （SEM） and X-ray diffraction （XRD） method. The influences of nano-ZnO charge numbers, temperatures and humidity on formaldehyde degradation rates of photocatalytic coating were emphatically discussed when the self-made nano-ZnO was introduced into photocatalytic coating, and the formaldehyde degradation rate in black case was used as evaluation index. The research results showed that the formaldehyde degradation rate of photocatalytic coating was more than 88% when ultraviolet（UV） irradiation time was 150 min, nano-ZnO charge number was 6 g, temperature and relative humidity in black case were 25 ℃ and 50% respectively.