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.

引用

页数：16

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