Highly Crystalline Carbon Nitrogen Polymer With A Strong Built-In Electric Fields for Ultra-High Photocatalytic H 2 O 2  Production

19 Pages Posted: 8 Sep 2023

See all articles by Liang Jian

Liang Jian

Jiangnan University

Yuming Dong

Jiangnan University

Hui Zhao

Jiangnan University

Chengsi Pan

Jiangnan University

Guangli Wang

Jiangnan University

Yongfa Zhu

Tsinghua University

Abstract

Efficient photogenerated charge separation and rapid migration provide more charges for surface redox reactions. Herein, the carbon nitride polymer with highly crystalline is prepared for efficient photocatalytic H2O2 generation. The strong built-in electric field induced by its high crystallinity is beneficial for promoting exciton dissociation, resulting in a surface photovoltage of 19.24 mV. Meanwhile, the formed nanocrystals shorten the charge migration distance to facilitate photogenerated charge rapid migration. The abundant surface −C≡N/−OH groups provide more active sites for the adsorption of O2. As a result, the photocatalytic H2O2 production rate (16.01 mM h-1 g-1) under visible light (λ>400 nm) was increased 77-fold relative to pristine graphitic carbon nitride, with a quantum efficiency of 25.1% at 405 nm. The photocatalytic H2O2 production reached 80.36 mM after 8 hours. The highly crystalline carbon nitride polymer throws prospect on photocatalytic H2O2 production, showing a new perspective for the design of photocatalysts.

Keywords: Photocatalysis, hydrogen peroxide (H2O2), highly crystalline, carbon nitride polymer, Built-in electric field

Suggested Citation

Jian, Liang and Dong, Yuming and Zhao, Hui and Pan, Chengsi and Wang, Guangli and Zhu, Yongfa, Highly Crystalline Carbon Nitrogen Polymer With A Strong Built-In Electric Fields for Ultra-High Photocatalytic H 2 O 2  Production. Available at SSRN: https://ssrn.com/abstract=4565663 or http://dx.doi.org/10.2139/ssrn.4565663

Liang Jian

Jiangnan University ( email )

1800 Lihu Ave.
Wuxi, 214122
China

Yuming Dong (Contact Author)

Jiangnan University ( email )

1800 Lihu Ave.
Wuxi, 214122
China

Hui Zhao

Jiangnan University ( email )

1800 Lihu Ave.
Wuxi, 214122
China

Chengsi Pan

Jiangnan University ( email )

1800 Lihu Ave.
Wuxi, 214122
China

Guangli Wang

Jiangnan University ( email )

1800 Lihu Ave.
Wuxi, 214122
China

Yongfa Zhu

Tsinghua University ( email )

Beijing, 100084
China

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