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Facile synthesis of GO and g-C3N4 nanosheets encapsulated magnetite ternary nanocomposite for superior photocatalytic degradation of phenol

Rehman, Ghani Ur and Muhammad Tahir, Muhammad Tahir and Goh, P. S. and Ismail, A. F. and Samavati, Alireza and Zulhairun, A. K. and Arzhandi, Rezaei Dasht (2019) Facile synthesis of GO and g-C3N4 nanosheets encapsulated magnetite ternary nanocomposite for superior photocatalytic degradation of phenol. Environmental Pollution, 253 . pp. 1066-1078. ISSN 0269-7491

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Official URL: http://dx.doi.org/10.1016/j.envpol.2019.07.013

Abstract

In this study, the synthesis of Fe3O4@GO@g-C3N4 ternary nanocomposite for enhanced photocatalytic degradation of phenol has been investigated. The surface modification of Fe3O4 was performed through layer-by-layer electrostatic deposition meanwhile the heterojunction structure of ternary nanocomposite was obtained through sonicated assisted hydrothermal method. The photocatalysts were characterized for their crystallinity, surface morphology, chemical functionalities, and band gap energy. The Fe3O4@GO@g-C3N4 ternary nanocomposite achieved phenol degradation of ∼97%, which was significantly higher than that of Fe3O4@GO (∼75%) and Fe3O4 (∼62%). The enhanced photoactivity was due to the efficient charge carrier separation and desired band structure. The photocatalytic performance was further enhanced with the addition of hydrogen peroxide, in which phenol degradation up to 100% was achieved in 2 h irradiation time. The findings revealed that operating parameters have significant influences on the photocatalytic activities. It was found that lower phenol concentration promoted higher activity. In this study, 0.3 g of Fe3O4@GO@g-C3N4 was found to be the optimized photocatalyst for phenol degradation. At the optimized condition, the reaction rate constant was reported as 6.96 × 10−3 min−1. The ternary photocatalyst showed excellent recyclability in three consecutive cycles, which confirmed the stability of this ternary nanocomposite for degradation applications.

Item Type:Article
Uncontrolled Keywords:Graphene oxide, Phenol
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:88157
Deposited By: Widya Wahid
Deposited On:15 Dec 2020 08:12
Last Modified:15 Dec 2020 08:12

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