分子印迹型碳纳米管掺杂二氧化钛光催化剂的合成及其对溶液中甲醛的降解

Degradation of Formaldehyde by Molecularly Imprinted CarbonNanotube-doped Titanium Dioxide Photocatalysts

通过溶胶-凝胶法和分子印迹技术制备了分子印迹型碳纳米管掺杂二氧化钛光催化剂,并通过扫描电镜(SEM)、差热-热重测定(DTA-TG)、傅里叶变换红外光谱(FTIR)和X-射线衍射(XRD)进行了表征。在氙灯照射下,用掺有分子印迹碳纳米管的二氧化钛光催化剂降解溶液中的甲醛,研究了时间、煅烧温度、催化剂用量等因素对降解效果的影响。结果表明,含有0.15%碳纳米管和0.075%印迹分子的二氧化钛光催化剂在500℃下煅烧后,降解了5 mg/L的甲醛溶液,3 h的最佳降解率为93.4%。

Molecularly imprinted carbon nanotube-doped titanium dioxide photocatalysts were prepared by sol-gel meth-od and molecular imprinting techniques and characterised by Scanning Electron Microscopy(SEM),Differential Thermogra-vimetry(DTA-TG),Fourier Transform Infrared(FTIR),and X-ray Diffraction(XRD).The titanium dioxide photocatalyst doped with molecularly imprinted carbon nanotubes was used to degrade formaldehyde solutions under xenon lamp irradia-tion,and the effects of time,calcination temperature and catalyst dosage on the degradation effect was studied and so on.The titanium dioxide photocatalyst containing 0.15%carbon nanotubes and 0.075%imprinted molecules calcined at 500 C de-graded 5 mg/L of formaldehyde solution under xenon lamp irradiation for 3 h.The best degradation rate was 93.4%.