Interface Chemical Bond Enhanced Ions Intercalated Carbon Nitride/CdSe‐Diethylenetriamine S‐Scheme Heterojunction for Photocatalytic H2O2 Synthesis in Pure Water

Author:

He Houwei1,Wang Zhongliao1,Zhang Jinfeng1,Shao Chunfeng1,Dai Kai1,Fan Ke2ORCID

Affiliation:

1. Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of Education Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Huaibei Normal University Huaibei 235000 P. R. China

2. State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 P. R. China

Abstract

AbstractPhotosynthesis of hydrogen peroxide (H2O2) is regarded as an economically efficient and environmentally friendly synthesis method. However, the scalability of photocatalytic H2O2 production (PHP) is hindered by the sluggish reaction kinetics and rapid recombination of photogenerated charge carriers. In this study, an organic amine‐constrained ions intercalated carbon nitride/CdSe‐diethylenetriamine (K+/I‐CN/CdSe‐D) S‐scheme heterojunction is synthesized using an organic–inorganic hybrid approach and employed for PHP for the first time. The optimization of the heterojunction interface by I and K+ ions contributed to enhanced light absorption capabilities and reduced interlayer charge transfer distance. Concurrently, the synergy of C─Se bonds at interface effectively modulated the electron transfer pathways. The coordination environment and charge transfer mechanism are thoroughly investigated by extended X‐ray absorption fine structure and in situ irradiated X‐ray photoelectron spectroscopy. The H2O2 production rate of 40%K+/I‐CN/CdSe‐D reached 2240.23 µmol h−1 g−1 in pure water. This study highlights the significance of dual tuning of interface chemical bonds and ionic intercalation as an effective strategy for enhancing the photocatalytic H2O2 , paving the way for further advancements in PHP technology.

Funder

National Natural Science Foundation of China

Anhui Provincial Quality Engineering Project

Publisher

Wiley

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