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Nano Research

Article Title

An efficient visible-light photocatalyst for CO2 reduction fabricated by cobalt porphyrin and graphitic carbon nitride via covalent bonding

Authors

Shufang Tian, Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for Highefficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
Sudi Chen, Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for Highefficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
Xitong Ren, Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for Highefficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
Yaoqing Hu, Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for Highefficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
Haiyan Hu, Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for Highefficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
Jiajie Sun, School of Physics and Electronics, Henan University, Kaifeng 475004, China
Feng Bai, Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for Highefficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China

Keywords

photocatalysis, CO2 reduction, carbon nitride, porphyrin, two-dimensional nanosheets, function integrated, covalent bonding

Abstract

Nanoparticle photosensitizers possess technical advantages for photocatalytic reactions due to enhanced light harvesting and efficient charge transport. Here we report synthesis of semiconductor nanoparticles through covalent coupling and assembly of metalloporphyrin with condensed carbon nitride. The resultant nanoparticles consist of light harvesting component from the condensed carbon nitride and photocatalytic sites from the metalloporphyrins. This synergetic particle system effectively initiates efficient charge separation and transport and exhibits excellent photocatalytic activity for CO2 reduction. The CO production rate can reach up to 57 μmol/(g·h) with a selectivity of 79% over competing H2 evolution. Controlled experiments demonstrate that the combination of light harvesting with photocatalytic activity via covalent assembly is crucial for the high photocatalytic activity. Due to effective charge separation and transfer, the resultant nanoparticle photocatalysts show exceptional photo stability against photo-corrosion under light irradiation, enabling for long-term utilization. This research opens a new way for the development of stable, effective nanoparticle photocatalysts using naturally abundant porphyrin pigments.

Graphical Abstract

Publisher

Tsinghua University Press

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