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Investigating the Properties of Cetyltrimethylammonium Bromide/Hydroxylated Graphene Quantum Dots Thin Film for Potential Optical Detection of Heavy Metal Ions

1
Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
2
Physics Unit, Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
3
Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
4
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
*
Author to whom correspondence should be addressed.
Materials 2020, 13(11), 2591; https://doi.org/10.3390/ma13112591
Received: 5 April 2020 / Revised: 24 April 2020 / Accepted: 29 April 2020 / Published: 6 June 2020
(This article belongs to the Section Thin Films and Interfaces)
The modification of graphene quantum dots (GQDs) may drastically enhance their properties, therefore resulting in various related applications. This paper reported the preparation of novel cetyltrimethylammonium bromide/hydroxylated graphene quantum dots (CTAB/HGQDs) thin film using the spin coating technique. The properties of the thin film were then investigated and studied. The functional groups existing in CTAB/HGQDs thin film were confirmed by the Fourier transform infrared (FTIR) spectroscopy, while the atomic force microscope (AFM) displayed a homogenous surface of the thin film with an increase in surface roughness upon modification. Optical characterizations using UV-Vis absorption spectroscopy revealed a high absorption with an optical band gap of 4.162 eV. Additionally, the photoluminescence (PL) spectra illustrated the maximum emission peak of CTAB/HGQDs thin film at a wavelength of 444 nm. The sensing properties of the as-prepared CTAB/HGQDs thin film were studied using a surface plasmon resonance technique towards the detection of several heavy metal ions (HMIs) (Zn2+, Ni2+, and Fe3+). This technique generated significant results and showed that CTAB/HGQDs thin film has great potential for HMIs detection. View Full-Text
Keywords: graphene quantum dots; cetyltrimethylammonium bromide; thin film; structural; optical; SPR; heavy metal ions graphene quantum dots; cetyltrimethylammonium bromide; thin film; structural; optical; SPR; heavy metal ions
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MDPI and ACS Style

Anas, N.A.A.; Fen, Y.W.; Yusof, N.A.; Omar, N.A.S.; Ramdzan, N.S.M.; Daniyal, W.M.E.M.M. Investigating the Properties of Cetyltrimethylammonium Bromide/Hydroxylated Graphene Quantum Dots Thin Film for Potential Optical Detection of Heavy Metal Ions. Materials 2020, 13, 2591. https://doi.org/10.3390/ma13112591

AMA Style

Anas NAA, Fen YW, Yusof NA, Omar NAS, Ramdzan NSM, Daniyal WMEMM. Investigating the Properties of Cetyltrimethylammonium Bromide/Hydroxylated Graphene Quantum Dots Thin Film for Potential Optical Detection of Heavy Metal Ions. Materials. 2020; 13(11):2591. https://doi.org/10.3390/ma13112591

Chicago/Turabian Style

Anas, Nur A.A.; Fen, Yap W.; Yusof, Nor A.; Omar, Nur A.S.; Ramdzan, Nur S.M.; Daniyal, Wan M.E.M.M. 2020. "Investigating the Properties of Cetyltrimethylammonium Bromide/Hydroxylated Graphene Quantum Dots Thin Film for Potential Optical Detection of Heavy Metal Ions" Materials 13, no. 11: 2591. https://doi.org/10.3390/ma13112591

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