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以漂珠为载体,用壳聚糖对漂珠进行改性,并采用溶胶凝胶法,制备了Fe-N共掺杂改性TiO2的漂浮型可见光催化剂(Fe-N-TiO2/FP-CTS),使用X射线衍射(XRD)、紫外可见分光光谱(UV-Vis)、N2吸附-脱附(BET)和扫描电子显微镜(SEM)等分析进行表征。研究结果表明,用壳聚糖改性漂珠可以增加复合光催化剂的比表面积和孔容;相较于N-掺杂TiO2/FP复合光催化剂,Fe-N共掺杂更能促进对复合光催化剂可见光的吸收;光催化4 h后,Fe-N-TiO2/FP-CTS对溶解性柴油的降解率达到61.7%,明显优于Fe-N-TiO2/FP和N-TiO2/FP。当初始pH=5,柴油乳化剂浓度=120 mg/L时,复合光催化剂对溶解性柴油的光催化降解效果最佳。
The floating-type visible light photocatalyst (Fe-N-TiO2 / FP-CTS) with Fe-N co-doping modified TiO2 was prepared by floating beads as carrier, ) Was characterized by X-ray diffraction (XRD), UV-Vis, N2 adsorption-desorption (BET) and scanning electron microscopy (SEM) The results show that modified beads can increase the specific surface area and pore volume of composite photocatalyst. Compared with N-doped TiO2 / FP composite photocatalyst, Fe-N co-doping can promote the photocatalytic activity of composite light After 4 h of photocatalysis, the degradation rate of diesel fuel reached 61.7% with Fe-N-TiO2 / FP-CTS, which was obviously better than that of Fe-N-TiO2 / FP and N-TiO2 / FP. When the initial pH was 5 and the diesel emulsifier concentration was 120 mg / L, the composite photocatalyst had the best photocatalytic activity on dissolving diesel.