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Nitrogen doped carbon quantum dots and GO modified WO3 nanosheets combination as an effective visible photo catalyst.

Authors
  • Jamila, Ghulam Sughra1
  • Sajjad, Shamaila2
  • Leghari, Sajjad Ahmed Khan3
  • Long, Mingce4
  • 1 International Islamic University, H-10 Islamabad, Pakistan. , (Pakistan)
  • 2 International Islamic University, H-10 Islamabad, Pakistan. Electronic address: [email protected] , (Pakistan)
  • 3 Pakistan Institute of Engineering and Applied Sciences, Islamabad, Pakistan. , (Pakistan)
  • 4 School of Environmental Science and Engineering Shanghai Jiao Tong University, Shanghai 200240, China. , (China)
Type
Published Article
Journal
Journal of hazardous materials
Publication Date
Jan 15, 2020
Volume
382
Pages
121087–121087
Identifiers
DOI: 10.1016/j.jhazmat.2019.121087
PMID: 31476720
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Nitrogen doped carbon quantum dots (NCQDs) based highly efficient ternary photocatalyst are fabricated by modifying surface of GO incorporated WO3 nano-sheets. XRD confirmed the formation of monoclinicWO3 nano-sheets. All the characteristic peaks of WO3, GO and NCQDs are obvious in XRD patterns of WO3/GO/NCQDs ternary photocatalysts confirming successful fabrication of the photocatalysts. SEM images showed that WO3 host matrix is distorted after incorporation of GO and NCQDs owing to lower interfacial tension. The surface of WO3 nano-sheets is modified with morphological defects making more active sites available. UV-vis spectra exhibited extended visible light absorption and remarkable reduction of WO3 band gap energy. The photoluminescence spectra confirmed the efficient charge separation in NCQDs modified ternary photocatalyst. The synthesized composites were applied for the photocatalytic degradation of harmful organic dye i.e. methyl orange (MO). The ternary composites represented the excellent photocatalytic activity as compared to binary and pure WO3 photocatalysts. This enhanced photocatalytic activity is attributed to the availability of active sites, extended light absorption in visible region and enhanced charge separation efficiency. Copyright © 2019 Elsevier B.V. All rights reserved.

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