2D-montmorillonite-dispersed g-C                         3                         N                         4                         /TiO                         2                          2D/0Dnanocomposite for enhanced photo-induced H                         2                          evolution from glycerol-water mixture

Nur Fajrina; Muhammad Tahir

doi:10.1016/j.apsusc.2018.12.076

2D-montmorillonite-dispersed g-C ₃ N ₄ /TiO ₂ 2D/0Dnanocomposite for enhanced photo-induced H ₂ evolution from glycerol-water mixture

Nur Fajrina
, Muhammad Tahir

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

84 Citations (Scopus)

Abstract

Montmorillonite (MMT) dispersed g-C ₃ N ₄ /TiO ₂ hybrid nanocomposite for enhanced photo-catalytic hydrogen production from glycerol-water mixture has been investigated. The newly designed composite photo-catalysts were fabricated through a sol-gel assisted hydrothermal method and were characterized by XRD, XPS, SEM, EDX, TEM, FTIR, UV–Vis, Raman and PL spectroscopy. Well-designed g-C ₃ N ₄ /MMT/TiO ₂ heterojunction composite was obtained with 2D MMT structure, which promoted both visible light absorption and hindered charges recombination rate. The modification of 2D/0D g-C ₃ N ₄ /TiO ₂ heterojunction with 2D MMT sheets enhances H ₂ production due to MMT works as a mediator for effective charges trapping and transportation within the composite structure. The g-C ₃ N ₄ /MMT/TiO ₂ photo-catalyst exhibits highest H ₂ production of 4425 ppm h ⁻¹ g ⁻¹ at pH 7.0, which was 2.12 times higher than the pure TiO ₂ (2085 ppm h ⁻¹ g ⁻¹ ). In addition, increasing catalyst loading promotes more H ₂ evolution and among the different sacrificial reagents, glycerol-water mixture gave highest H ₂ production due to the presence of α-hydrogen atoms attached to carbon atoms. The enhanced photo-catalytic efficiency can be attributed to synergistic effect of MMT with g-C ₃ N ₄ /TiO ₂ heterojunction composite, appropriate band structure and transportation of electrons–holes with their hindered recombination rate. These composite catalysts exhibited excellent photo-catalytic stability for H ₂ production in cyclic runs. Possible reaction mechanism for hydrogen production over g-C ₃ N ₄ /MMT/TiO ₂ composite has been explained based on the experimental results. The finding of this work would be fruitful for hydrogen production applications with all sustainable systems.

Original language	English
Pages (from-to)	1053-1064
Number of pages	12
Journal	Applied Surface Science
Volume	471
DOIs	https://doi.org/10.1016/j.apsusc.2018.12.076
Publication status	Published - Mar 31 2019
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

g-C N
Hydrogen production
Montmorillonite
Photo-catalysis
TiO
Z-scheme

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2018.12.076

Cite this

Fajrina, N., & Tahir, M. (2019). 2D-montmorillonite-dispersed g-C ₃ N ₄ /TiO ₂ 2D/0Dnanocomposite for enhanced photo-induced H ₂ evolution from glycerol-water mixture Applied Surface Science, 471, 1053-1064. https://doi.org/10.1016/j.apsusc.2018.12.076

2D-montmorillonite-dispersed g-C ₃ N ₄ /TiO ₂ 2D/0Dnanocomposite for enhanced photo-induced H ₂ evolution from glycerol-water mixture . / Fajrina, Nur; Tahir, Muhammad.
In: Applied Surface Science, Vol. 471, 31.03.2019, p. 1053-1064.

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

Fajrina, N & Tahir, M 2019, ' 2D-montmorillonite-dispersed g-C ₃ N ₄ /TiO ₂ 2D/0Dnanocomposite for enhanced photo-induced H ₂ evolution from glycerol-water mixture ', Applied Surface Science, vol. 471, pp. 1053-1064. https://doi.org/10.1016/j.apsusc.2018.12.076

Fajrina N, Tahir M. 2D-montmorillonite-dispersed g-C ₃ N ₄ /TiO ₂ 2D/0Dnanocomposite for enhanced photo-induced H ₂ evolution from glycerol-water mixture Applied Surface Science. 2019 Mar 31;471:1053-1064. doi: 10.1016/j.apsusc.2018.12.076

Fajrina, Nur ; Tahir, Muhammad. / 2D-montmorillonite-dispersed g-C ₃ N ₄ /TiO ₂ 2D/0Dnanocomposite for enhanced photo-induced H ₂ evolution from glycerol-water mixture In: Applied Surface Science. 2019 ; Vol. 471. pp. 1053-1064.

@article{b5092396a6c041dfa2214e9ea8c40256,

title = " 2D-montmorillonite-dispersed g-C 3 N 4 /TiO 2 2D/0Dnanocomposite for enhanced photo-induced H 2 evolution from glycerol-water mixture ",

abstract = " Montmorillonite (MMT) dispersed g-C 3 N 4 /TiO 2 hybrid nanocomposite for enhanced photo-catalytic hydrogen production from glycerol-water mixture has been investigated. The newly designed composite photo-catalysts were fabricated through a sol-gel assisted hydrothermal method and were characterized by XRD, XPS, SEM, EDX, TEM, FTIR, UV–Vis, Raman and PL spectroscopy. Well-designed g-C 3 N 4 /MMT/TiO 2 heterojunction composite was obtained with 2D MMT structure, which promoted both visible light absorption and hindered charges recombination rate. The modification of 2D/0D g-C 3 N 4 /TiO 2 heterojunction with 2D MMT sheets enhances H 2 production due to MMT works as a mediator for effective charges trapping and transportation within the composite structure. The g-C 3 N 4 /MMT/TiO 2 photo-catalyst exhibits highest H 2 production of 4425 ppm h −1 g −1 at pH 7.0, which was 2.12 times higher than the pure TiO 2 (2085 ppm h −1 g −1 ). In addition, increasing catalyst loading promotes more H 2 evolution and among the different sacrificial reagents, glycerol-water mixture gave highest H 2 production due to the presence of α-hydrogen atoms attached to carbon atoms. The enhanced photo-catalytic efficiency can be attributed to synergistic effect of MMT with g-C 3 N 4 /TiO 2 heterojunction composite, appropriate band structure and transportation of electrons–holes with their hindered recombination rate. These composite catalysts exhibited excellent photo-catalytic stability for H 2 production in cyclic runs. Possible reaction mechanism for hydrogen production over g-C 3 N 4 /MMT/TiO 2 composite has been explained based on the experimental results. The finding of this work would be fruitful for hydrogen production applications with all sustainable systems.",

keywords = "g-C N, Hydrogen production, Montmorillonite, Photo-catalysis, TiO, Z-scheme",

author = "Nur Fajrina and Muhammad Tahir",

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doi = "10.1016/j.apsusc.2018.12.076",

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AB - Montmorillonite (MMT) dispersed g-C 3 N 4 /TiO 2 hybrid nanocomposite for enhanced photo-catalytic hydrogen production from glycerol-water mixture has been investigated. The newly designed composite photo-catalysts were fabricated through a sol-gel assisted hydrothermal method and were characterized by XRD, XPS, SEM, EDX, TEM, FTIR, UV–Vis, Raman and PL spectroscopy. Well-designed g-C 3 N 4 /MMT/TiO 2 heterojunction composite was obtained with 2D MMT structure, which promoted both visible light absorption and hindered charges recombination rate. The modification of 2D/0D g-C 3 N 4 /TiO 2 heterojunction with 2D MMT sheets enhances H 2 production due to MMT works as a mediator for effective charges trapping and transportation within the composite structure. The g-C 3 N 4 /MMT/TiO 2 photo-catalyst exhibits highest H 2 production of 4425 ppm h −1 g −1 at pH 7.0, which was 2.12 times higher than the pure TiO 2 (2085 ppm h −1 g −1 ). In addition, increasing catalyst loading promotes more H 2 evolution and among the different sacrificial reagents, glycerol-water mixture gave highest H 2 production due to the presence of α-hydrogen atoms attached to carbon atoms. The enhanced photo-catalytic efficiency can be attributed to synergistic effect of MMT with g-C 3 N 4 /TiO 2 heterojunction composite, appropriate band structure and transportation of electrons–holes with their hindered recombination rate. These composite catalysts exhibited excellent photo-catalytic stability for H 2 production in cyclic runs. Possible reaction mechanism for hydrogen production over g-C 3 N 4 /MMT/TiO 2 composite has been explained based on the experimental results. The finding of this work would be fruitful for hydrogen production applications with all sustainable systems.

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