Photocatalysis removing of NO based on modified carbon nitride: The effect of celestite mineral particles

被引：119
作者：
Dong, Guohui [1 ]
Zhao, Liaoliao [1 ]
Wu, Xiaoxia [2 ]
Zhu, Mingshan [3 ]
Wang, Fu [2 ]
机构：
[1] Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[3] Jinan Univ, Sch Environm, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 510632, Guangdong, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 245卷
关键词：
NO removal; Photocatalysis; Mineral particles; Celestite; g-C3N4; VISIBLE-LIGHT IRRADIATION; G-C3N4; PERFORMANCE; DEGRADATION; HYDROGEN; OXIDE;
D O I：
10.1016/j.apcatb.2019.01.013
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Atmospheric NO is one of the toxic and hazardous gases. Its' levels are continually rising in recent years. As we known, mineral particles contained in the atmosphere may affect the photocatalytic NO removal process. In this study, we found that celestite modification could greatly improve the activity (about 3.8 times) and stability of g-C3N4 for the photocatalytic NO removal. In our system, celestite particles embed in the N vacancies of g-C3N4. The synergistic effect of celestite and N vacancy is the origin of improved NO removal activity. During the light irradiation, photogenerated electrons can be captured and confined by N vacancy. Meanwhile, celestite can transfer these confined electrons to O-2 and produce more OH, which could oxidize NO to nitrate. These findings can help us to understand the influence of mineral particles in the photocatalytic NO removal and design highly efficient NO removal phtocatalysts.
引用
收藏
页码：459 / 468
页数：10
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