View in EDS

Dual molecules engineered carbon nitride for achieving outstanding photocatalytic H2O2 production.

Saved in:

Bibliographic Details
Title:	Dual molecules engineered carbon nitride for achieving outstanding photocatalytic H2O2 production.
Authors:	Wei, Wei¹ (AUTHOR), Zou, Leilei¹ (AUTHOR), Li, Jin^1,2 (AUTHOR), Hou, Fengming^1,3 (AUTHOR), Sheng, Zekai¹ (AUTHOR), Li, Yihang¹ (AUTHOR), Guo, Zhipeng¹ (AUTHOR), Wei, Ang¹ (AUTHOR) wei1177@126.com
Source:	Journal of Colloid & Interface Science. Apr2023, Vol. 636, p537-548. 12p.
Subjects:	Nitrides, Organic semiconductors, Valence bands, Cyano group, Visible spectra, Energy bands
Abstract:	[Display omitted] • A novel dual-molecular engineering of carbon nitride was designed. • The dual molecules engineered carbon nitride revealed outstanding photocatalytic H 2 O 2 production. • Due to the synergistic effect of the dual grafted molecules, 2e- oxygen reduction reaction was strengthened. • Caused by the positive valence band potential, H 2 O oxidation reaction played an indispensable role. Molecular engineering of carbon nitride (CN) was considered as a suitable and compelling strategy to overcome the intrinsic imperfections and enhance photocatalytic H 2 O 2 production. However, the photocatalytic H 2 O 2 production of conventional single molecular engineering is still unsatisfactory, and the comprehension of photogenerated carrier migration and separation is still indistinct. Herein, dual molecules were engineered on CN molecular skeleton for achieving an outstanding photocatalytic rate of H 2 O 2 production. The photocatalytic H 2 O 2 production rate of the dual molecules engineered CN was up to 3320 μmol g−1 h−1, which was approximately 25 times than that of the pristine CN. After the dual-molecular engineering, pyrimidine and cyano group were co-grafted. Synchronously, K ion and Na ion were co-embedded near the interlamination of CN layers. The synergistic effect of the dual molecules in CN not only restrained photogenerated carrier recombination and broadened visible light response by modulating the intrinsic energy band structure, but also enhanced the capture of the photogenerated electrons and accelerated the migration of proton. Hence, the photocatalytic 2e- oxygen reduction reaction, the rate-determining step, was significantly strengthened. Additionally, caused by the positive valence band potential, the H 2 O oxidation reaction became an indispensable role in photocatalytic H 2 O 2 production. This work provided a viable route to modulate the molecular skeleton of organic semiconductors and presented a promising strategy to obtain high-efficient photocatalytic H 2 O 2 production. [ABSTRACT FROM AUTHOR]
	Copyright of Journal of Colloid & Interface Science is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

Description
Abstract:	[Display omitted] • A novel dual-molecular engineering of carbon nitride was designed. • The dual molecules engineered carbon nitride revealed outstanding photocatalytic H 2 O 2 production. • Due to the synergistic effect of the dual grafted molecules, 2e- oxygen reduction reaction was strengthened. • Caused by the positive valence band potential, H 2 O oxidation reaction played an indispensable role. Molecular engineering of carbon nitride (CN) was considered as a suitable and compelling strategy to overcome the intrinsic imperfections and enhance photocatalytic H 2 O 2 production. However, the photocatalytic H 2 O 2 production of conventional single molecular engineering is still unsatisfactory, and the comprehension of photogenerated carrier migration and separation is still indistinct. Herein, dual molecules were engineered on CN molecular skeleton for achieving an outstanding photocatalytic rate of H 2 O 2 production. The photocatalytic H 2 O 2 production rate of the dual molecules engineered CN was up to 3320 μmol g−1 h−1, which was approximately 25 times than that of the pristine CN. After the dual-molecular engineering, pyrimidine and cyano group were co-grafted. Synchronously, K ion and Na ion were co-embedded near the interlamination of CN layers. The synergistic effect of the dual molecules in CN not only restrained photogenerated carrier recombination and broadened visible light response by modulating the intrinsic energy band structure, but also enhanced the capture of the photogenerated electrons and accelerated the migration of proton. Hence, the photocatalytic 2e- oxygen reduction reaction, the rate-determining step, was significantly strengthened. Additionally, caused by the positive valence band potential, the H 2 O oxidation reaction became an indispensable role in photocatalytic H 2 O 2 production. This work provided a viable route to modulate the molecular skeleton of organic semiconductors and presented a promising strategy to obtain high-efficient photocatalytic H 2 O 2 production. [ABSTRACT FROM AUTHOR]
ISSN:	00219797
DOI:	10.1016/j.jcis.2023.01.046