Enhanced catalytic activity of potassium-doped graphitic carbon nitride induced by lower valence position

被引：346

作者：

Zhang, Mo ^{[1
]}

Bai, Xiaojuan ^{[1
]}

Liu, Di ^{[1
]}

Wang, Jun ^{[1
]}

Zhu, Yongfa ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing Key Lab Analyt Methods & Instrumentat, Beijing 100084, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2015年 / 164卷

基金：

国家高技术研究发展计划(863计划); 美国国家科学基金会;

关键词：

g-C3N4; Potassium doping; Photocatalysis; Phenol degradation; PHOTOCATALYTIC ACTIVITY; VISIBLE-LIGHT; HYDROGEN-PRODUCTION; ELECTRONIC-STRUCTURE; G-C3N4; DEGRADATION; PERFORMANCE; NANOSHEETS; EVOLUTION; PHENOL;

D O I：

10.1016/j.apcatb.2014.09.020

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：

The potassium doped graphitic carbon nitride (K-C3N4) photocatalysts were prepared via thermal polymerization of dicyandiamide and Kiln atmosphere. The valence band (VB) position of g-C3N4 was decreased via potassium doping, resulting in enhanced separation and immigration of photogenerated carriers under visible light. The optimum K-C3N4 exhibited obviously enhanced photocatalytic activities for phenol and MB degradation, which were about 3.3 and 5.8 times as high as those of bulk g-C3N4, respectively. The photocatalytic activity of K-C3N4 decreased with excessive KI mass fraction in the precursor due to the incomplete polymerization of g-C3N4. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：77 / 81

页数：5

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