光致发光
量子点
石墨烯
过氧化氢
光谱学
材料科学
纳米技术
化学工程
化学
光电子学
物理
有机化学
量子力学
工程类
作者
Tran Nhan Tam Quyen,Ngo Thi Tra My,Duy Phong Pham,Doan Van Hong Thien
出处
期刊:Talanta open
[Elsevier]
日期:2022-03-01
卷期号:5: 100103-100103
被引量:2
标识
DOI:10.1016/j.talo.2022.100103
摘要
TiO 2 nanosheets/graphene quantum dots (TiO 2 NSs/GQDs) have been successfully developed using a simple and rapid process at 60 °C for 30 min. The GQDs were obtained using a natural source of rice starch and ascorbic acid, a reducing agent, under a rapid and simple microwave-assisted synthetic method for 10 min; and TiO 2 NSs were synthesized by hydrothermal method. The synthesized TiO 2 NSs/GQDs were characterized by Ultraviolet-visible spectroscopy (UV-vis), Fourier-transform infrared spectroscopy (FTIR), X – ray Diffractometry (XRD), Transmission Electron Microscopy (TEM), and Energy Dispersive X-Ray Analysis (EDX). The novel TiO 2 NSs/GQDs were successfully synthesized, possessed an average particle size of ∼10–15 nm (TiO 2 NSs) and ∼8–10 nm (GQDs), and were homogenously distributed in the dispersion. Regarding the catalytic application, the TiO 2 NSs/GQDs demonstrated high catalytic and photocatalytic activity for the detection of hydrogen peroxide (H 2 O 2 ) by photoluminescence spectroscopy at an excitation wavelength of 360 nm, with a low H 2 O 2 limit of detection (LOD) of 10 −14 M and a wide detection range from 10 −14 M to 10 −2 M. A novel, low-cost and eco-friendly method to fabricate TiO 2 nanosheets/graphene quantum dots (TiO 2 NSs/GQDs) composites in a simple step was proposed. Herein, GQDs were prepared using natural source from rice starch under a supporting of microwave irradiation with rapidly approach in 10 min; and TiO 2 nanosheets (TiO 2 NSs) synthesized by hydrothermal method were successfully combined to generate highly catalytic ability and photocatalytic activity TiO 2 NSs/GQDs composites. Furthermore, the ability of TiO 2 NSs/GQDs has been successfully used to detect hydrogen peroxide (H 2 O 2 ). The results of the luminescence spectroscopy (PL) shown the potential of TiO 2 NSs/GQDs in detecting H 2 O 2 as a sensitive sensor when reaching extremely low limit of detection (LOD) of H 2 O 2 in solution (10 −14 M) in the wide detection range from 10 −14 to 10 −2 M.
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