Polymeric Carbon Nitride-CNTs-Ferric Oxide All-Solid Z-Scheme Heterojunction with Improved Photocatalytic Activity towards Organic Dye Removal

被引：4

作者：

Yang, Xinxin ^{[1
]}

Gong, Rongcai ^{[1
]}

Dong, Zhaocen ^{[1
]}

Liu, Guiqing ^{[1
]}

Han, Yunyi ^{[2
]}

Hou, Yuwei ^{[2
]}

Li, Yanjun ^{[2
]}

Guan, Meili ^{[3
]}

Gong, Xuezhong ^{[1
]}

Tang, Jianguo ^{[1
]}

机构：

[1] Qingdao Univ, Coll Mat Sci & Engn, Natl Base Int Sci & Technol Cooperat, Inst Hybrid Mat,Natl Ctr Int Res Hybrid Mat Techno, Qingdao 266071, Peoples R China

[2] Qingdao Univ, Coll Mat Sci & Engn, Qingdao 266071, Peoples R China

[3] Shandong Univ Sci & Technol, Coll Chem & Biol Engn, Qingdao 266590, Peoples R China

来源：

CATALYSTS | 2024年 / 14卷 / 08期

基金：

中国国家自然科学基金;

关键词：

PCN; alpha-Fe2O3; Z-scheme; heterojunction; photocatalytic degradation; WATER;

D O I：

10.3390/catal14080516

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：

Polymeric carbon nitride (PCN) is a kind of polymeric semiconductor that is widely popular in photocatalysis-related energy and environmental fields. However, the photocatalytic activity is still limited due to its poor conductivity and low charge separation efficiency. In this work, benzene rings were introduced to adjust the electronic structure of PCN, and then a PCN-based all-solid Z-scheme heterojunction was fabricated by combing multiwall carbon nanotubes (CNTs) and ferric oxide through precipitation and the in situ deposit method. Upon optimizing the ratio between PCN, CNTs, and Fe2O3, (PCN:CNTs:Fe2O3 = 10:1:3 by weight), the composites expressed superior photocatalytic degradation activity towards methylene blue (MB) and crystal violet (CV) compared with pristine PCN and Fe2O3. The MB degradation percentage achieved 90% in 75 min, and the CV up to 99.6% within 50 min. The Z-scheme mechanism was verified by band alignment and metal selective deposition. The CNTs in the heterojunction played the role of an electron shuttling mediator and hence improved charge separation efficiency. This work provides ideas for the construction of polymer-inorganic all-solid Z-scheme photocatalysts for practical applications.

引用

页数：13

共 39 条

[21] Recent advances in g-C3N4-based heterojunction photocatalysts [J].