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

被引：30
作者：
Anas, Nur Ain Asyiqin [1 ,2 ]
Fen, Yap Wing [1 ,3 ]
Yusof, Nor Azah [4 ]
Omar, Nur Alia Sheh [1 ]
Ramdzan, Nur Syahira Md [3 ]
Daniyal, Wan Mohd Ebtisyam Mustaqim Mohd [1 ]
机构：
[1] Univ Putra Malaysia, Inst Adv Technol, Funct Devices Lab, Upm Serdang 43400, Selangor, Malaysia
[2] Univ Putra Malaysia, Ctr Fdn Studies Agr Sci, Phys Unit, Upm Serdang 43400, Selangor, Malaysia
[3] Univ Putra Malaysia, Fac Sci, Dept Phys, Upm Serdang 43400, Selangor, Malaysia
[4] Univ Putra Malaysia, Fac Sci, Dept Chem, Upm Serdang 43400, Selangor, Malaysia
来源：
MATERIALS | 2020年 / 13卷 / 11期
关键词：
graphene quantum dots; cetyltrimethylammonium bromide; thin film; structural; optical; SPR; heavy metal ions; SURFACE-PLASMON RESONANCE; CATIONIC SURFACTANT; CTAB CONCENTRATION; SENSING PROPERTIES; SENSOR; NANOPARTICLES; OXIDE; SENSITIVITY; ADSORPTION; FUNCTIONALIZATION;
D O I：
10.3390/ma13112591
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
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页数：16
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