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Synergistic effect of g-C3N4, Ni(OH)(2) and halloysite in nanocomposite photocatalyst on efficient photocatalytic hydrogen generation

Hojamberdiev, Mirabbos and Khan, Mohammad Mansoob and Kadirova, Zukhra and Kawashima, Kenta and Yubuta, Kunio and Teshima, Katsuya and Riedel, Ralf and Hasegawa, Masashi (2019):
Synergistic effect of g-C3N4, Ni(OH)(2) and halloysite in nanocomposite photocatalyst on efficient photocatalytic hydrogen generation.
In: Renewable Energy, Pergamon Elsevier Science, pp. 434-444, 138, ISSN 09601481,
DOI: 10.1016/j.renene.2019.01.103,
[Online-Edition: https://www.sciencedirect.com/science/article/pii/S096014811...],
[Article]

Abstract

Here, we develop a strategy to improve the visible-light-driven photocatalytic hydrogen evolution activity of g-C3N4 by compositing it with low-cost Ni(OH)(2) nanoplatelets and inexpensive and earth abundant halloysite nanotubes. The Ni(OH)(2)@g-C3N4/halloysite nanocomposite photocatalysts with different amounts of Ni(OH)(2) (0.5-10 wt%) were prepared, and a synergistic effect of Ni(OH)(2) platelets and halloysite nanotubes on physicochemical properties and photocatalytic hydrogen evolution activity of g-C3N4 was investigated. As expected, the Ni(OH)(2)@g-C3N4/halloysite nanocomposite photocatalyst prepared with 1 wt% Ni(OH)(2) exhibited the highest photocatalytic hydrogen evolution rate (18.4(2) mol h(-1)) which is much higher than that of g-C3N4 (0.43 limo] h(-1)) and Ni(OH)(2)@g-C3N4 (9.1(2),umol h(-1)). Such enhancement in photocatalytic activity of Ni(OH)(2)@g-C(3)N(4)Thalloysite nano composite photocatalyst is attributed to efficient transfer of photogenerated electrons from the g-C3N4 to Ni(OH)(2) cocatalyst interface and trapping of photogenerated holes on the negatively charged surfaces of halloysite nanotubes. In addition, adsorption affinity of the water and methanol molecules was modeled using different surfaces of Ni(OH)(2), halloysite-7A, and g-C3N4 and it is found that combining the g-C3N4 with halloysite-7A and Ni(OH)(2) can significantly improve the adsorption of water and methanol molecules on the surface of the developed nanocomposite. This study offers a simple approach for developing an efficient and inexpensive nanocomposite for effective and applied photocatalytic water splitting methodology for hydrogen production and other possible optoelectronic and photocatalytic applications.

Item Type: Article
Erschienen: 2019
Creators: Hojamberdiev, Mirabbos and Khan, Mohammad Mansoob and Kadirova, Zukhra and Kawashima, Kenta and Yubuta, Kunio and Teshima, Katsuya and Riedel, Ralf and Hasegawa, Masashi
Title: Synergistic effect of g-C3N4, Ni(OH)(2) and halloysite in nanocomposite photocatalyst on efficient photocatalytic hydrogen generation
Language: English
Abstract:

Here, we develop a strategy to improve the visible-light-driven photocatalytic hydrogen evolution activity of g-C3N4 by compositing it with low-cost Ni(OH)(2) nanoplatelets and inexpensive and earth abundant halloysite nanotubes. The Ni(OH)(2)@g-C3N4/halloysite nanocomposite photocatalysts with different amounts of Ni(OH)(2) (0.5-10 wt%) were prepared, and a synergistic effect of Ni(OH)(2) platelets and halloysite nanotubes on physicochemical properties and photocatalytic hydrogen evolution activity of g-C3N4 was investigated. As expected, the Ni(OH)(2)@g-C3N4/halloysite nanocomposite photocatalyst prepared with 1 wt% Ni(OH)(2) exhibited the highest photocatalytic hydrogen evolution rate (18.4(2) mol h(-1)) which is much higher than that of g-C3N4 (0.43 limo] h(-1)) and Ni(OH)(2)@g-C3N4 (9.1(2),umol h(-1)). Such enhancement in photocatalytic activity of Ni(OH)(2)@g-C(3)N(4)Thalloysite nano composite photocatalyst is attributed to efficient transfer of photogenerated electrons from the g-C3N4 to Ni(OH)(2) cocatalyst interface and trapping of photogenerated holes on the negatively charged surfaces of halloysite nanotubes. In addition, adsorption affinity of the water and methanol molecules was modeled using different surfaces of Ni(OH)(2), halloysite-7A, and g-C3N4 and it is found that combining the g-C3N4 with halloysite-7A and Ni(OH)(2) can significantly improve the adsorption of water and methanol molecules on the surface of the developed nanocomposite. This study offers a simple approach for developing an efficient and inexpensive nanocomposite for effective and applied photocatalytic water splitting methodology for hydrogen production and other possible optoelectronic and photocatalytic applications.

Journal or Publication Title: Renewable Energy
Volume: 138
Publisher: Pergamon Elsevier Science
Uncontrolled Keywords: g-C3N4; Halloysite; Ni(OH)(2); Hydrogen production; Water splitting; Nanocomposite METAL-FREE; HYDROTHERMAL SYNTHESIS; EVOLUTION REACTION; CLAY-MINERALS; WATER; COMPOSITES; ACETALDEHYDE
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 24 Jun 2019 06:39
DOI: 10.1016/j.renene.2019.01.103
Official URL: https://www.sciencedirect.com/science/article/pii/S096014811...
Projects: Erasmus - Mundus FAME (Functionalized Advanced Materials and Engineering) Master Program for Visiting Scholarship
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