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

82 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

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

UN SDGs

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

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.

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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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AU - Fajrina, Nur

AU - Tahir, Muhammad

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N2 - 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.

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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