摘要
以三聚氰胺、硝酸铁和硝酸镍为原料,一锅法制备了较高比表面积Ni/Fe-C_3N_4,用光照还原法在其表面原位沉积Ag,制得Ni/Fe-C_3N_4/Ag复合材料,并以甲基橙溶液作为目标污染物进行光催化实验.实验发现,与单一的g-C_3N_4相比,在掺杂Ni/Fe及原位负载银后,光催化性能明显提高,且Ni/Fe-C_3N_4/Ag的光催化效果最优.结果表明,Ni/Fe掺杂和纳米Ag沉积的协同作用,增强了Ni/Fe-C_3N_4/Ag的光吸收能力,促进了光生电子和空穴的有效分离,有效提高了复合材料的光催化性能.
A novel Ni/Fe-C 3N 4/Ag composite photocatalyst was successfully fabricated.First,Ni/Fe-C 3N 4 was prepared by pyrolysis the mixture of Fe(NO 3)3·9H 2O,Ni(NO 3)3·6H 2O,and melamine precursor at 550℃in N 2 atmosphere.Then Ag nanoparticles were dispersed on the surface of Ni/Fe-C 3N 4 by using photo-deposition method.The photocatalytic activity was evaluated by photocatalytic degradation of methyl orange(MO)under light irradiation.Ni/Fe-C 3N 4/Ag exhibited the highest photo degradation activity when compared with g-C 3N 4 and Ni/Fe-C 3N 4.The results indicate that significant enhancement of catalytic activity mainly ascribed to the co-doping of Fe/Ni and deposition of Ag which can effectively expand the absorption of visible light and improve the separation efficiency of photogenerated electron-hole pairs.
作者
从宪玲
葛博
赵利民
李文智
CONG Xian-ling;GE Bo;ZHAO Li-min;LI Wen-zhi(School of Material Science and Engineering,Liaocheng University,252059,China)
出处
《聊城大学学报（自然科学版）》
2018年第3期12-18,共7页
Journal of Liaocheng University:Natural Science Edition
基金
国家自然科学基金项目(51072075)
山东省自然科学基金项目(ZR2014EL009)资助
关键词
光催化
掺杂
沉积
协同作用
phtocatalysis
doping
photo-deposition
synergy
