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Amalgamation of N-graphene quantum dots with nanocubic like TiO2: An insight study of sunlight sensitive photocatalysis

Lim, Ping Feng and Leong, Kah Hon and Sim, Lan Ching and Azrina, Abd Aziz and Saravanan, Pichiah (2019) Amalgamation of N-graphene quantum dots with nanocubic like TiO2: An insight study of sunlight sensitive photocatalysis. Environmental Science and Pollution Research, 26 (4). pp. 3455-3464. ISSN 1614-7499

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Abstract

In this work, a sunlight-sensitive photocatalyst of nanocubic-like titanium dioxide (TiO2) and N-doped graphene quantum dots (N-GQDs) is developed through a simple hydrothermal and physical mixing method. The successful amalgamation composite photocatalyst characteristics were comprehensively scrutinized through various physical and chemical analyses. A complete removal of bisphenol A (BPA) is attained by a synthesized composite after 30 min of sunlight irradiation as compared to pure TiO2. This clearly proved the unique contribution of N-GQDs that enhanced the ability of light harvesting especially under visible light and near-infrared region. This superior characteristic enables it to maximize the absorbance in the entire solar spectrum. However, the increase of N-GQDs weight percentage has created massive oxygen vacancies that suppress the generation of active radicals. This resulted in a longer duration for a complete removal of BPA as compared to lower weight percentage of N-GQDs. Hence, this finding can offer a new insight in developing effective sunlight-sensitive photocatalysts for various complex organic pollutants degradation.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: N-Graphene quantumdots; Nanocubic-like; TiO2; Bisphenol A; Sunlight; Visible light; Near infrared
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Engineering Technology
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 02 Apr 2020 01:44
Last Modified: 02 Apr 2020 01:44
URI: http://umpir.ump.edu.my/id/eprint/27561
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