A facile method to introduce a donor-acceptor system into polymeric carbon nitride for efficient photocatalytic overall water splitting

Jiang，Yabin1,2; Cao，Chi3,5; Tan，Yueyang2; Chen，Qianwen2; Zeng，Lei2; Yang，Wensheng3,4; Sun，Zongzhao2; Huang，Limin2

2023-04-01

10.1016/j.jmst.2022.09.024

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY   Impact Factor & Quartile

1005-0302

1941-1162

It is a prospective strategy to produce sustainable energy by photocatalytic overall water splitting (POWS). This work aims to develop a simple method for integrating a donor-acceptor system into polymeric carbon nitride (PCN) structure, which could accelerate the charge separation significantly. In the as-prepared photocatalyst (COCNT), carbon and oxygen were successfully incorporated into the framework of PCN, and the chemical environment of C and O was well probed by X-ray absorption near-edge structure (XANES) and X-ray photoelectron spectroscopy (XPS). It showed that the C-containing and O-containing segments of COCNT played the role of a donor, while the heptazine part played the role of an acceptor. In addition, Density-functional-theory (DFT) calculations confirmed the spatial split of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) for promoting charge separation. Impressively, COCNT could efficiently split pure water to generate hydrogen and oxygen. And, the photocatalytic hydrogen evolution rate over COCNT (1550.9 µmol g h) is about 17-fold higher than that of PCN. Finally, we proposed a possible photocatalytic mechanism to explain the above results.

Donor-accept system Overall water splitting Photocatalysis Polymeric carbon nitride Tubular structure

SCI

English

Corresponding

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N532];National Natural Science Foundation of China[21703097];National Natural Science Foundation of China[21972172];

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000891068500004

JOURNAL MATER SCI TECHNOL

MATERIALS SCIENCE

2-s2.0-85141891654

Scopus

1.School of Materials,Sun Yat-Sen University,Shenzhen,518107,China
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
3.Engineering Research Center for Nanomaterials,Henan University,Kaifeng,475004,China
4.Institute of Molecular Plus,Tianjin University,Tianjin,300072,China
5.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun,130012,China

Jiang，Yabin,Cao，Chi,Tan，Yueyang,et al. A facile method to introduce a donor-acceptor system into polymeric carbon nitride for efficient photocatalytic overall water splitting[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,141:32-41.

Jiang，Yabin.,Cao，Chi.,Tan，Yueyang.,Chen，Qianwen.,Zeng，Lei.,...&Huang，Limin.(2023).A facile method to introduce a donor-acceptor system into polymeric carbon nitride for efficient photocatalytic overall water splitting.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,141,32-41.

Jiang，Yabin,et al."A facile method to introduce a donor-acceptor system into polymeric carbon nitride for efficient photocatalytic overall water splitting".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 141(2023):32-41.