Boosting of photocatalytic hydrogen evolution via chlorine doping of polymeric carbon nitride

Beilstein Journal of Nanotechnology

article

Malgorzata Aleksandrzak¹  Michalina Kijaczko¹  Wojciech Kukulka¹  Daria Baranowska¹  Martyna Baca¹  Beata Zielinska¹  Ewa Mijowska¹ 

[1] Nanomaterials Physicochemistry Department, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology

关键词: chlorine;    doping;    hydrogen evolution reaction;    photocatalysis;    polymeric carbon nitride;   

DOI  :  10.3762/bjnano.12.38

学科分类：环境监测和分析

来源: Beilstein - Institut zur Foerderung der Chemischen Wissenschaften

【 摘 要 】

Chlorine is found to be a suitable element for the modification of polymeric carbon nitride properties towards an efficient visiblelight photocatalytic activity. In this study, chlorine-doped polymeric carbon nitride (Cl-PCN) has been examined as a photocatalystin the hydrogen evolution reaction. The following aspects were found to enhance the photocatalytic efficiency of Cl-PCN:(i) unique location of Cl atoms at the interlayers of PCN instead of on its π-conjugated planes, (ii) slight bandgap narrowing,(iii) lower recombination rate of the electron–hole pairs, (iv) improved photogenerated charge transport and separation, and(v) higher reducing ability of the photogenerated electrons. The above factors affected the 4.4-fold enhancement of the photocatalytic efficiency in hydrogen evolution in comparison to the pristine catalyst.

【 授权许可】

CC BY