Enhanced Photocatalytic Hydrogen Evolution of Carbon Quantum Dot Modified 1D Protonated Nanorods of Graphitic Carbon Nitride

Lingling Li; Xunjin Zhu

doi:10.1021/acsanm.8b01381

Enhanced Photocatalytic Hydrogen Evolution of Carbon Quantum Dot Modified 1D Protonated Nanorods of Graphitic Carbon Nitride

Lingling Li, Xunjin Zhu^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

39 Citations (Scopus)

Abstract

1D protonated graphitic carbon nitride (HCN) are prepared through free-template chemical method and further modified with different amount of carbon quantum dots (CQDs) to afford new hybrids denoted as HCNC-x (x represents weight ratio of CQDs) for photocatalytic hydrogen evolution. The immobilization of CQDs onto HCN not only significantly improves the visible-light harvesting, but also prolongs the lifetime of charge carriers upon photoexcitation and suppresses the recombination of electron-hole pairs because of the intimate interface formed between the two components with opposite charges. As a result, the HCNC-0.50 show the highest photocatalytic hydrogen evolution rate of 382 μmol h^-1 g^-1 under visible light irritation, which was about 3-fold of pristine HCNC-0.0. Moreover, no decay of activity is observed for the HCNC-x hybrids that is recycled after 12 h photocatalytic reaction and then exposed to air for half a year.

Original language	English
Pages (from-to)	5337-5344
Number of pages	8
Journal	ACS Applied Nano Materials
Volume	1
Issue number	9
DOIs	https://doi.org/10.1021/acsanm.8b01381
Publication status	Published - 28 Sept 2018

Scopus Subject Areas

Materials Science(all)

User-Defined Keywords

1-D nanorods
carbon quantum dot
hydrogen evolution
photocatalysis
protonated graphitic carbon nitride

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsanm.8b01381

Cite this

@article{f78ff7e032a14abbae003f0643cf18a7,

title = "Enhanced Photocatalytic Hydrogen Evolution of Carbon Quantum Dot Modified 1D Protonated Nanorods of Graphitic Carbon Nitride",

abstract = "1D protonated graphitic carbon nitride (HCN) are prepared through free-template chemical method and further modified with different amount of carbon quantum dots (CQDs) to afford new hybrids denoted as HCNC-x (x represents weight ratio of CQDs) for photocatalytic hydrogen evolution. The immobilization of CQDs onto HCN not only significantly improves the visible-light harvesting, but also prolongs the lifetime of charge carriers upon photoexcitation and suppresses the recombination of electron-hole pairs because of the intimate interface formed between the two components with opposite charges. As a result, the HCNC-0.50 show the highest photocatalytic hydrogen evolution rate of 382 μmol h-1 g-1 under visible light irritation, which was about 3-fold of pristine HCNC-0.0. Moreover, no decay of activity is observed for the HCNC-x hybrids that is recycled after 12 h photocatalytic reaction and then exposed to air for half a year.",

keywords = "1-D nanorods, carbon quantum dot, hydrogen evolution, photocatalysis, protonated graphitic carbon nitride",

author = "Lingling Li and Xunjin Zhu",

note = "Funding information: This work was financially supported by Hong Kong Research Grants Council (HKBU 22304115-ECS), Areas of Excellence Scheme ([AoE/P-03/08]), Hong Kong Baptist University (FRG1/15-16/052, FRG2/16-17/024, RC-ICRS/15-16/02E, RC-ICRS/1617/02C-CHE and RC-IRMS/16/17/02CHEM), and the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20150630164505504). Publisher copyright: {\textcopyright} 2018 American Chemical Society",

year = "2018",

month = sep,

day = "28",

doi = "10.1021/acsanm.8b01381",

language = "English",

volume = "1",

pages = "5337--5344",

journal = "ACS Applied Nano Materials",

issn = "2574-0970",

publisher = "American Chemical Society",

number = "9",

}

TY - JOUR

T1 - Enhanced Photocatalytic Hydrogen Evolution of Carbon Quantum Dot Modified 1D Protonated Nanorods of Graphitic Carbon Nitride

AU - Li, Lingling

AU - Zhu, Xunjin

N1 - Funding information: This work was financially supported by Hong Kong Research Grants Council (HKBU 22304115-ECS), Areas of Excellence Scheme ([AoE/P-03/08]), Hong Kong Baptist University (FRG1/15-16/052, FRG2/16-17/024, RC-ICRS/15-16/02E, RC-ICRS/1617/02C-CHE and RC-IRMS/16/17/02CHEM), and the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20150630164505504). Publisher copyright: © 2018 American Chemical Society

PY - 2018/9/28

Y1 - 2018/9/28

N2 - 1D protonated graphitic carbon nitride (HCN) are prepared through free-template chemical method and further modified with different amount of carbon quantum dots (CQDs) to afford new hybrids denoted as HCNC-x (x represents weight ratio of CQDs) for photocatalytic hydrogen evolution. The immobilization of CQDs onto HCN not only significantly improves the visible-light harvesting, but also prolongs the lifetime of charge carriers upon photoexcitation and suppresses the recombination of electron-hole pairs because of the intimate interface formed between the two components with opposite charges. As a result, the HCNC-0.50 show the highest photocatalytic hydrogen evolution rate of 382 μmol h-1 g-1 under visible light irritation, which was about 3-fold of pristine HCNC-0.0. Moreover, no decay of activity is observed for the HCNC-x hybrids that is recycled after 12 h photocatalytic reaction and then exposed to air for half a year.

AB - 1D protonated graphitic carbon nitride (HCN) are prepared through free-template chemical method and further modified with different amount of carbon quantum dots (CQDs) to afford new hybrids denoted as HCNC-x (x represents weight ratio of CQDs) for photocatalytic hydrogen evolution. The immobilization of CQDs onto HCN not only significantly improves the visible-light harvesting, but also prolongs the lifetime of charge carriers upon photoexcitation and suppresses the recombination of electron-hole pairs because of the intimate interface formed between the two components with opposite charges. As a result, the HCNC-0.50 show the highest photocatalytic hydrogen evolution rate of 382 μmol h-1 g-1 under visible light irritation, which was about 3-fold of pristine HCNC-0.0. Moreover, no decay of activity is observed for the HCNC-x hybrids that is recycled after 12 h photocatalytic reaction and then exposed to air for half a year.

KW - 1-D nanorods

KW - carbon quantum dot

KW - hydrogen evolution

KW - photocatalysis

KW - protonated graphitic carbon nitride

UR - http://www.scopus.com/inward/record.url?scp=85061277907&partnerID=8YFLogxK

U2 - 10.1021/acsanm.8b01381

DO - 10.1021/acsanm.8b01381

M3 - Journal article

AN - SCOPUS:85061277907

SN - 2574-0970

VL - 1

SP - 5337

EP - 5344

JO - ACS Applied Nano Materials

JF - ACS Applied Nano Materials

IS - 9

ER -

Enhanced Photocatalytic Hydrogen Evolution of Carbon Quantum Dot Modified 1D Protonated Nanorods of Graphitic Carbon Nitride

Abstract

Scopus Subject Areas

User-Defined Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this