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

  • Ping Feng Lim
  • Kah Hon Leong
  • Lan Ching Sim
  • Azrina Abd Aziz
  • Pichiah Saravanan
Research Article
  • 54 Downloads

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.

Keywords

N-Graphene quantum dots Nanocubic-like TiO2 Bisphenol A Sunlight Visible light Near Infrared 

Notes

Acknowledgements

This research work was supported by the Universiti Tunku Abdul Rahman Research Fund, UTARRF (IPSR/RMC/UTARRF/2016-C2/L05).

Supplementary material

11356_2018_3821_MOESM1_ESM.docx (196 kb)
ESM 1 (DOCX 196 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Environmental Engineering, Faculty of Engineering and Green TechnologyUniversiti Tunku Abdul RahmanKamparMalaysia
  2. 2.Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanKajangMalaysia
  3. 3.Department of Energy and Environment, Faculty of Engineering TechnologyUniversiti Malaysia PahangKuantanMalaysia
  4. 4.Environmental Nanotechnology Laboratory, Department of Environmental Science and EngineeringIndian Institute of Technology (ISM)DhanbadIndia

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