2D/2D heterojunction of Ti                         3                         C                         2                         /g-C                         3                         N                         4                          nanosheets for enhanced photocatalytic hydrogen evolution

Tongming Su; Zachary D. Hood; Michael Naguib; Lei Bai; Si Luo; Christopher M. Rouleau; Ilia N. Ivanov; Hongbing Ji; Zuzeng Qin; Zili Wu

doi:10.1039/c9nr00168a

2D/2D heterojunction of Ti ₃ C ₂ /g-C ₃ N ₄ nanosheets for enhanced photocatalytic hydrogen evolution

Tongming Su, Zachary D. Hood, Michael Naguib, Lei Bai, Si Luo, Christopher M. Rouleau, Ilia N. Ivanov, Hongbing Ji, Zuzeng Qin, Zili Wu

Research output: Contribution to journal › Article › peer-review

334 Scopus citations

Abstract

Photocatalytic hydrogen evolution from water has received enormous attention due to its ability to address a number of global environmental and energy-related issues. Here, we synthesize 2D/2D Ti ₃ C ₂ /g-C ₃ N ₄ composites by electrostatic self-assembly technique and demonstrate their use as photocatalysts for hydrogen evolution under visible light irradiation. The optimized Ti ₃ C ₂ /g-C ₃ N ₄ composite exhibited a 10 times higher photocatalytic hydrogen evolution performance (72.3 μmol h ^-1 g _cat ^-1 ) than that of pristine g-C ₃ N ₄ (7.1 μmol h ^-1 g _cat ^-1 ). Such enhanced photocatalytic performance was due to the formation of 2D/2D heterojunctions in the Ti ₃ C ₂ /g-C ₃ N ₄ composites. The intimate contact between the monolayer Ti ₃ C ₂ and g-C ₃ N ₄ nanosheets promotes the separation of photogenerated charge carriers at the Ti ₃ C ₂ /g-C ₃ N ₄ interface. Furthermore, the ultrahigh conductivity of Ti ₃ C ₂ and the Schottky junction formed between g-C ₃ N ₄ /MXene interfaces facilitate the photoinduced electron transfer and suppress the recombination with photogenerated holes. This work demonstrates that the 2D/2D Ti ₃ C ₂ /g-C ₃ N ₄ composites are promising photocatalysts thanks to the ultrathin MXenes as efficient co-catalysts for photocatalytic hydrogen production.

Original language	English
Pages (from-to)	8138-8149
Number of pages	12
Journal	Nanoscale
Volume	11
Issue number	17
DOIs	https://doi.org/10.1039/c9nr00168a
State	Published - May 7 2019
Externally published	Yes

Funding

This research was supported and conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. TMS acknowledges the support from China Scholarship Council. ZDH gratefully acknowledges a Graduate Research Fellowship award from the National Science Foundation (DGE-1650044). LB acknowledges financial support from National Science Foundation supplemental intern funding 1511818.

Funders	Funder number
DOE Office of Science
National Science Foundation	1511818, DGE-1650044
China Scholarship Council

UN SDGs

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

Access to Document

10.1039/c9nr00168a

Cite this

Su, T., Hood, Z. D., Naguib, M., Bai, L., Luo, S., Rouleau, C. M., Ivanov, I. N., Ji, H., Qin, Z., & Wu, Z. (2019). 2D/2D heterojunction of Ti ₃ C ₂ /g-C ₃ N ₄ nanosheets for enhanced photocatalytic hydrogen evolution Nanoscale, 11(17), 8138-8149. https://doi.org/10.1039/c9nr00168a

Su, Tongming ; Hood, Zachary D. ; Naguib, Michael et al. / 2D/2D heterojunction of Ti ₃ C ₂ /g-C ₃ N ₄ nanosheets for enhanced photocatalytic hydrogen evolution In: Nanoscale. 2019 ; Vol. 11, No. 17. pp. 8138-8149.

@article{aaaf1e07ef444ab7abbaed2ef9978ff9,

title = " 2D/2D heterojunction of Ti 3 C 2 /g-C 3 N 4 nanosheets for enhanced photocatalytic hydrogen evolution ",

abstract = " Photocatalytic hydrogen evolution from water has received enormous attention due to its ability to address a number of global environmental and energy-related issues. Here, we synthesize 2D/2D Ti 3 C 2 /g-C 3 N 4 composites by electrostatic self-assembly technique and demonstrate their use as photocatalysts for hydrogen evolution under visible light irradiation. The optimized Ti 3 C 2 /g-C 3 N 4 composite exhibited a 10 times higher photocatalytic hydrogen evolution performance (72.3 μmol h -1 g cat -1 ) than that of pristine g-C 3 N 4 (7.1 μmol h -1 g cat -1 ). Such enhanced photocatalytic performance was due to the formation of 2D/2D heterojunctions in the Ti 3 C 2 /g-C 3 N 4 composites. The intimate contact between the monolayer Ti 3 C 2 and g-C 3 N 4 nanosheets promotes the separation of photogenerated charge carriers at the Ti 3 C 2 /g-C 3 N 4 interface. Furthermore, the ultrahigh conductivity of Ti 3 C 2 and the Schottky junction formed between g-C 3 N 4 /MXene interfaces facilitate the photoinduced electron transfer and suppress the recombination with photogenerated holes. This work demonstrates that the 2D/2D Ti 3 C 2 /g-C 3 N 4 composites are promising photocatalysts thanks to the ultrathin MXenes as efficient co-catalysts for photocatalytic hydrogen production.",

author = "Tongming Su and Hood, {Zachary D.} and Michael Naguib and Lei Bai and Si Luo and Rouleau, {Christopher M.} and Ivanov, {Ilia N.} and Hongbing Ji and Zuzeng Qin and Zili Wu",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2019.",

year = "2019",

month = may,

day = "7",

doi = "10.1039/c9nr00168a",

language = "English",

volume = "11",

pages = "8138--8149",

journal = "Nanoscale",

issn = "2040-3364",

publisher = "Royal Society of Chemistry",

number = "17",

}

Su, T, Hood, ZD, Naguib, M, Bai, L, Luo, S, Rouleau, CM, Ivanov, IN, Ji, H, Qin, Z & Wu, Z 2019, ' 2D/2D heterojunction of Ti ₃ C ₂ /g-C ₃ N ₄ nanosheets for enhanced photocatalytic hydrogen evolution ', Nanoscale, vol. 11, no. 17, pp. 8138-8149. https://doi.org/10.1039/c9nr00168a

2D/2D heterojunction of Ti ₃ C ₂ /g-C ₃ N ₄ nanosheets for enhanced photocatalytic hydrogen evolution . / Su, Tongming; Hood, Zachary D.; Naguib, Michael et al.
In: Nanoscale, Vol. 11, No. 17, 07.05.2019, p. 8138-8149.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - 2D/2D heterojunction of Ti 3 C 2 /g-C 3 N 4 nanosheets for enhanced photocatalytic hydrogen evolution

AU - Su, Tongming

AU - Hood, Zachary D.

AU - Naguib, Michael

AU - Bai, Lei

AU - Luo, Si

AU - Rouleau, Christopher M.

AU - Ivanov, Ilia N.

AU - Ji, Hongbing

AU - Qin, Zuzeng

AU - Wu, Zili

PY - 2019/5/7

Y1 - 2019/5/7

N2 - Photocatalytic hydrogen evolution from water has received enormous attention due to its ability to address a number of global environmental and energy-related issues. Here, we synthesize 2D/2D Ti 3 C 2 /g-C 3 N 4 composites by electrostatic self-assembly technique and demonstrate their use as photocatalysts for hydrogen evolution under visible light irradiation. The optimized Ti 3 C 2 /g-C 3 N 4 composite exhibited a 10 times higher photocatalytic hydrogen evolution performance (72.3 μmol h -1 g cat -1 ) than that of pristine g-C 3 N 4 (7.1 μmol h -1 g cat -1 ). Such enhanced photocatalytic performance was due to the formation of 2D/2D heterojunctions in the Ti 3 C 2 /g-C 3 N 4 composites. The intimate contact between the monolayer Ti 3 C 2 and g-C 3 N 4 nanosheets promotes the separation of photogenerated charge carriers at the Ti 3 C 2 /g-C 3 N 4 interface. Furthermore, the ultrahigh conductivity of Ti 3 C 2 and the Schottky junction formed between g-C 3 N 4 /MXene interfaces facilitate the photoinduced electron transfer and suppress the recombination with photogenerated holes. This work demonstrates that the 2D/2D Ti 3 C 2 /g-C 3 N 4 composites are promising photocatalysts thanks to the ultrathin MXenes as efficient co-catalysts for photocatalytic hydrogen production.

AB - Photocatalytic hydrogen evolution from water has received enormous attention due to its ability to address a number of global environmental and energy-related issues. Here, we synthesize 2D/2D Ti 3 C 2 /g-C 3 N 4 composites by electrostatic self-assembly technique and demonstrate their use as photocatalysts for hydrogen evolution under visible light irradiation. The optimized Ti 3 C 2 /g-C 3 N 4 composite exhibited a 10 times higher photocatalytic hydrogen evolution performance (72.3 μmol h -1 g cat -1 ) than that of pristine g-C 3 N 4 (7.1 μmol h -1 g cat -1 ). Such enhanced photocatalytic performance was due to the formation of 2D/2D heterojunctions in the Ti 3 C 2 /g-C 3 N 4 composites. The intimate contact between the monolayer Ti 3 C 2 and g-C 3 N 4 nanosheets promotes the separation of photogenerated charge carriers at the Ti 3 C 2 /g-C 3 N 4 interface. Furthermore, the ultrahigh conductivity of Ti 3 C 2 and the Schottky junction formed between g-C 3 N 4 /MXene interfaces facilitate the photoinduced electron transfer and suppress the recombination with photogenerated holes. This work demonstrates that the 2D/2D Ti 3 C 2 /g-C 3 N 4 composites are promising photocatalysts thanks to the ultrathin MXenes as efficient co-catalysts for photocatalytic hydrogen production.

UR - http://www.scopus.com/inward/record.url?scp=85064888187&partnerID=8YFLogxK

U2 - 10.1039/c9nr00168a

DO - 10.1039/c9nr00168a

M3 - Article

C2 - 30788480

AN - SCOPUS:85064888187

SN - 2040-3364

VL - 11

SP - 8138

EP - 8149

JO - Nanoscale

JF - Nanoscale

IS - 17

ER -

Su T, Hood ZD, Naguib M, Bai L, Luo S, Rouleau CM et al. 2D/2D heterojunction of Ti ₃ C ₂ /g-C ₃ N ₄ nanosheets for enhanced photocatalytic hydrogen evolution Nanoscale. 2019 May 7;11(17):8138-8149. doi: 10.1039/c9nr00168a