光催化
甲酸
硝酸盐
草酸
异质结
氮气
选择性
化学
无机化学
甲醇
材料科学
核化学
催化作用
有机化学
光电子学
作者
Huilong Shi,Chunhu Li,Liang Wang,Wentai Wang,Xiangchao Meng
标识
DOI:10.1016/j.jhazmat.2021.127711
摘要
Nitrate and its metabolites as common pollutants in water had attracted widespread attentions. Converting nitrate to nontoxic and harmless nitrogen via photocatalysis was a promising approach. In this study, a novel Z-scheme NH2-MIL-101(Fe)/BiVO4 heterojunction was successfully prepared. As-prepared Z-scheme heterojunction along with built-in electric field facilitated the charge separation and enhanced the photocatalytic activity in nitrate reduction. The results showed that 0.10-MBiVO photocatalyst exhibited the highest nitrate removal rate of 94.8% (initial concentration 100 mgN/L) and final selectivity to N2 of 93.4% in 50 min under ultraviolet irradiation. Moreover, formic acid was proved as better hole scavenger compared with methanol and oxalic acid. And the concentration of formic acid had significant influence on the process of nitrate photocatalytic reduction. 0.10-MBiVO photocatalyst exhibited excellent reusability in the recycling tests, indicating its great potential in practical application of nitrate photocatalytic removal. The mechanism of the enhancement as well as reaction pathways for nitrate photocatalytic reduction on NH2-MIL-101(Fe)/BiVO4 were comprehensively explored and described at the end.
科研通智能强力驱动
Strongly Powered by AbleSci AI