A comprehensive understanding on the roles of carbon dots in metallated graphyne based catalyst for photoinduced H2O2 production

Yajie Zhao; Linli Xu; Xiao Wang; Zhenzhen Wang; Yan Liu; Yang Wang; Qiaolian Wang; Zitong Wang; Hui Huang; Yang Liu; Wai Yeung Wong; Zhenhui Kang

doi:10.1016/j.nantod.2022.101428

A comprehensive understanding on the roles of carbon dots in metallated graphyne based catalyst for photoinduced H₂O₂ production

Yajie Zhao, Linli Xu (Corresponding Author), Xiao Wang, Zhenzhen Wang, Yan Liu, Yang Wang, Qiaolian Wang, Zitong Wang, Hui Huang, Yang Liu (Corresponding Author), Wai Yeung Wong (Corresponding Author), Zhenhui Kang (Corresponding Author)

Research output: Journal article publication › Journal article › Academic research › peer-review

50 Citations (Scopus)

Abstract

Photocatalysis is regarded as a sustainable H₂O₂ manufacturing method. Carbon dots (CDs) are widely used in photocatalysis due to their excellent photoelectric features, while the current understanding of their functions is incomplete. Metallated graphyne is raised as a novel photofunctional 2D organometallic nanosheet which combines the merits of metals and graphynes. To deeply understand the functions of CDs and unlock the potential of mercurated graphyne (HgL1) in photocatalysis, a CDs/HgL1 composite catalyst was constructed. Under visible light, the H₂O₂ production rate catalyzed by CDs/HgL1 (800 µmol h⁻¹ g⁻¹) is 6.4 times higher than that of pristine HgL1 bulk (125 µmol h⁻¹ g⁻¹). The effects of CDs on HgL1 run through the photocatalytic process, including accelerating the electron-hole separation and migration, improving the redox activity and changing the surface state from hydrophobicity to hydrophilicity. This work offers new avenues for the intelligent design of CDs-based photocatalysts and pioneers the application of metallated graphyne in photocatalysis.

Original language	English
Article number	101428
Journal	Nano Today
Volume	43
DOIs	https://doi.org/10.1016/j.nantod.2022.101428
Publication status	Published - Apr 2022

Keywords

Carbon dots
Hydrogen peroxide
Metallated graphyne
Photocatalysis
Transient photovoltage

ASJC Scopus subject areas

Biotechnology
Bioengineering
Biomedical Engineering
General Materials Science
Pharmaceutical Science

More information

10.1016/j.nantod.2022.101428

Cite this

@article{a144951973e442c4b5d4922488911187,

title = "A comprehensive understanding on the roles of carbon dots in metallated graphyne based catalyst for photoinduced H2O2 production",

abstract = "Photocatalysis is regarded as a sustainable H2O2 manufacturing method. Carbon dots (CDs) are widely used in photocatalysis due to their excellent photoelectric features, while the current understanding of their functions is incomplete. Metallated graphyne is raised as a novel photofunctional 2D organometallic nanosheet which combines the merits of metals and graphynes. To deeply understand the functions of CDs and unlock the potential of mercurated graphyne (HgL1) in photocatalysis, a CDs/HgL1 composite catalyst was constructed. Under visible light, the H2O2 production rate catalyzed by CDs/HgL1 (800 µmol h−1 g−1) is 6.4 times higher than that of pristine HgL1 bulk (125 µmol h−1 g−1). The effects of CDs on HgL1 run through the photocatalytic process, including accelerating the electron-hole separation and migration, improving the redox activity and changing the surface state from hydrophobicity to hydrophilicity. This work offers new avenues for the intelligent design of CDs-based photocatalysts and pioneers the application of metallated graphyne in photocatalysis.",

keywords = "Carbon dots, Hydrogen peroxide, Metallated graphyne, Photocatalysis, Transient photovoltage",

author = "Yajie Zhao and Linli Xu and Xiao Wang and Zhenzhen Wang and Yan Liu and Yang Wang and Qiaolian Wang and Zitong Wang and Hui Huang and Yang Liu and Wong, {Wai Yeung} and Zhenhui Kang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = apr,

doi = "10.1016/j.nantod.2022.101428",

language = "English",

volume = "43",

journal = "Nano Today",

issn = "1748-0132",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - A comprehensive understanding on the roles of carbon dots in metallated graphyne based catalyst for photoinduced H2O2 production

AU - Zhao, Yajie

AU - Xu, Linli

AU - Wang, Xiao

AU - Wang, Zhenzhen

AU - Liu, Yan

AU - Wang, Yang

AU - Wang, Qiaolian

AU - Wang, Zitong

AU - Huang, Hui

AU - Liu, Yang

AU - Wong, Wai Yeung

AU - Kang, Zhenhui

PY - 2022/4

Y1 - 2022/4

N2 - Photocatalysis is regarded as a sustainable H2O2 manufacturing method. Carbon dots (CDs) are widely used in photocatalysis due to their excellent photoelectric features, while the current understanding of their functions is incomplete. Metallated graphyne is raised as a novel photofunctional 2D organometallic nanosheet which combines the merits of metals and graphynes. To deeply understand the functions of CDs and unlock the potential of mercurated graphyne (HgL1) in photocatalysis, a CDs/HgL1 composite catalyst was constructed. Under visible light, the H2O2 production rate catalyzed by CDs/HgL1 (800 µmol h−1 g−1) is 6.4 times higher than that of pristine HgL1 bulk (125 µmol h−1 g−1). The effects of CDs on HgL1 run through the photocatalytic process, including accelerating the electron-hole separation and migration, improving the redox activity and changing the surface state from hydrophobicity to hydrophilicity. This work offers new avenues for the intelligent design of CDs-based photocatalysts and pioneers the application of metallated graphyne in photocatalysis.

AB - Photocatalysis is regarded as a sustainable H2O2 manufacturing method. Carbon dots (CDs) are widely used in photocatalysis due to their excellent photoelectric features, while the current understanding of their functions is incomplete. Metallated graphyne is raised as a novel photofunctional 2D organometallic nanosheet which combines the merits of metals and graphynes. To deeply understand the functions of CDs and unlock the potential of mercurated graphyne (HgL1) in photocatalysis, a CDs/HgL1 composite catalyst was constructed. Under visible light, the H2O2 production rate catalyzed by CDs/HgL1 (800 µmol h−1 g−1) is 6.4 times higher than that of pristine HgL1 bulk (125 µmol h−1 g−1). The effects of CDs on HgL1 run through the photocatalytic process, including accelerating the electron-hole separation and migration, improving the redox activity and changing the surface state from hydrophobicity to hydrophilicity. This work offers new avenues for the intelligent design of CDs-based photocatalysts and pioneers the application of metallated graphyne in photocatalysis.

KW - Carbon dots

KW - Hydrogen peroxide

KW - Metallated graphyne

KW - Photocatalysis

KW - Transient photovoltage

UR - http://www.scopus.com/inward/record.url?scp=85124456911&partnerID=8YFLogxK

U2 - 10.1016/j.nantod.2022.101428

DO - 10.1016/j.nantod.2022.101428

M3 - Journal article

AN - SCOPUS:85124456911

SN - 1748-0132

VL - 43

JO - Nano Today

JF - Nano Today

M1 - 101428

ER -