摘要
为提高TiO2粉体的光催化降解效率,采用共沉淀-水热法制备二氧化钛/磁性氧化石墨烯(TiO_(2)/GO-Fe_(3)O_(4)),研究制备条件及催化剂用量对TiO_(2)/GO-Fe_(3)O_(4)光催化性能的影响。结果表明:当GO浓度为0.4mg/mL、异丙醇用量为44mL、钛酸四丁酯用量为6mL、水热反应时间为8h、催化剂投加量为30mg时,TiO_(2)/GO-Fe_(3)O_(4)对亚甲基蓝溶液的光催化降解性能最佳,降解率达到86%。采用多种手段对TiO_(2)/GO-Fe_(3)O_(4)进行表征,结果显示:TiO_(2)/GO-Fe_(3)O_(4)为尖晶石型Fe_(3)O_(4)和锐钛矿型TiO 2的含C复合材料;该材料颗粒较大、表面较粗糙、比表面积较大、具有磁性。TiO_(2)/GO-Fe_(3)O_(4)复合材料由于含有Fe_(3)O_(4)而具有磁性,由于引入氧化石墨烯,比表面积增大,光催化降解性能增强。
In order to improve the photocatalytic degradation efficiency of TiO2pow der,ti-tanium dioxide/magnetic graphene oxide(TiO_(2)/GO-Fe_(3)O_(4))was prepared by coprecipitati-on-hydrothermal method.The effects of preparation conditions and catalyst dosage on the photocatalytic performance w ere studied.The results show ed that w hen the concentration of GO w as 0.4mg/mL,the dosage of isopropanol w as 44mL,the dosage of tetrabutyl titanate w as 6mL,the hydrothermal reaction time w as 8h,and the dosage of catalyst w as 30mg,the photocatalytic degradation rate of TiO_(2)/GO-Fe_(3)O_(4)to methylene blue solution w as the best,and the degradation rate reached 86%.TiO_(2)/GO-Fe_(3)O_(4)w as characterized by various char-acterization methods.The results show ed that TiO_(2)/GO-Fe_(3)O_(4)w as spinel Fe_(3)O_(4),anatase TiO_(2)and C-containing composites.The material has large particles w ith rough surface.TiO_(2)/GO-Fe_(3)O_(4)composite has magnetism because of containing Fe_(3)O_(4).Due to the intro-duction of graphene oxide,the specific surface area of photocatalyst is increased and the activity of photocatalyst is enhanced.
作者
刘晨浩
姜承志
LIU Chenhao;JIANG Chengzhi(Shenyang Ligong University,Shengyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2022年第3期46-52,58,共8页
Journal of Shenyang Ligong University
基金
辽宁省科技厅大型仪器共享项目(2017yiqi10)
沈阳理工大学科研创新团队建设计划资助项目。
关键词
光催化
二氧化钛
磁性氧化石墨烯
亚甲基蓝
photocatalysis
titanium dioxide
magnetic graphene oxide
methylene blue
