Details

Autor(en) / Beteiligte

• Jiang, Longbo
• Yuan, Xingzhong
• Pan, Yang
• Liang, Jie
• Zeng, Guangming
• Wu, Zhibin
• Wang, Hou

Titel

Doping of graphitic carbon nitride for photocatalysis: A review

Ist Teil von

• Applied catalysis. B, Environmental, 2017-11, Vol.217, p.388-406

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• [Display omitted] •Element doped g-C3N4 for improved photocatalytic activity is summarized.•Band gap engineering regarding the catalytic activity improvement is explicated.•Metal doping, nonmetal doping, co-doping and heterojunction design are explored.•Increased light absorption and improved charge separation rate are obtained.•The crystallographic, textural and electronic structures are synergistically tuned. As a fascinating conjugated polymer, graphitic carbon nitride (g-C3N4) has been the hotspot in the materials science as a metal-free and visible-light-responsive photocatalyst. Pure g-C3N4 suffers from the insufficient sunlight absorption, low surface area and the fast recombination of photo-induced electron-hole pairs, resulting in low photocatalytic activity. Element doping is known to be an efficient method to tune the unique electronic structure and band gap of g-C3N4, which considerably broaden the light responsive range and enhance the charge separation. This review summarizes the recent progress in the development of efficient and low cost doped g-C3N4 systems in various realms such as photocatalytic hydrogen evolution, reduction of carbon dioxide, photocatalytic removal of contaminants in wastewater and gas phase. Typically, metal doping, nonmetal doping, co-doping and heterojunction based on doped g-C3N4 have been explored to simultaneously tune the crystallographic, textural and electronic structures for improving photocatalytic activity by enhancing the light absorption, facilitating the charge separation and transportation and prolonging the charge carrier lifetime. Finally, the current challenges and the crucial issues of element doped g-C3N4 photocatalysts that need to be addressed in future research are presented. This review presented herein can pave a novel avenue and add invaluable knowledge to the family of element doped g-C3N4 for the develop of more effective visible-light-driven photocatalysts.