原位CVD法生长碳纳米管组装CNT/TiO_2多孔复合膜

In-situ synthesis of CNTs/TiO_2 porous composite film by chemical vapor deposition

在FTO导电玻璃上组装了CNTs/Fe-Ni/TiO2多孔复合膜光催化剂.首先制备合成孔剂嵌段聚合物P123和掺杂铁和镍的TiO2前驱体溶胶,然后采用喷涂热解法在FTO导电玻璃上组装掺杂铁和镍的TiO2多孔膜,最后采用CVD法将CNTs原位生长在多孔TiO2膜上,得到过渡金属掺杂的CNTs/TiO2多孔复合膜.通过XRD、SEM、TEM、Rarman和光电流等方法考察了原位生长CNTs的工艺条件对CNTs/TiO2复合膜光催化剂的结构和性能的影响,并通过降解甲基橙溶液评价了CNTs生长工艺条件对光催化活性的影响.考察了多孔复合膜在液相光催化降解中的稳定性.结果表明,原位生长CNTs的较适宜的工艺条件为：温度550～600℃,时间20min.

In this work,porous CNTs/Fe-Ni/TiO2 photo-catalyst composite film was assembled on FTO conducting glass substrate.Firstly,nickel and iron doped titanium dioxide sol precursor containing block polymer P123 was prepared by sol-gel methoc.Then,Fe-Ni/TiO2 porous film on FTO conductive glass substrate was prepared using the spray pyrolysis deposition technique.Finally,CNTs were in situ grown on Fe-Ni/TiO2 porous film by chemical vapor deposition（CVD） method,to prepare a nickel and iron doped CNTs/TiO2 porous composite film.The CNTs/Fe-Ni/TiO2 porous composite film photocatalyst was characterized by X-ray diffraction,field emission scanning electron microscopy,transmission electron microscopy）,Raman spectra and photo-current responses.The photocatalytic activity and stability were investigated by photodegradation of methyl orange.The results show that the optimized photocatalytic perfrmance activity is achieved when the time of CVD is 20 minutes and the temperatures are 550-600 ℃.