TiO2/rGO: Synthesis and application to cadmium and lead simultaneous determination by stripping voltammetry
Vol. 131 No. 1C (2022), Original Article
Vol. 131 No. 1C (2022)

TiO2/rGO: Synthesis and application to cadmium and lead simultaneous determination by stripping voltammetry

Original Article
https://doi.org/10.26459/hueunijns.v131i1C.6882
Published 2022-09-30
Vu Ngoc Hoang
Tan Hiep High School, QL 80, Tan Hiep, Kien Giang, Vietnam
Vu Thien
Tan Hiep High School, QL 80, Tan Hiep, Kien Giang, Vietnam
Huynh Ngoc Thiet
Department of Education and Training Gia Lai, 56 Tran Hung Dao St., Pleiku, Gia Lai, Vietnam
Nguyen Mau Thanh*
Quang Binh University, 312 Ly Thuong Kiet St., Dong Hoi, Quang Binh, Vietnam
PDF (Vietnamese)

Keywords

reduced graphene oxide
titanium dioxide
cadmium
lead
stripping voltammetry graphen oxit dạng khử
titan dioxit
cadimi
chì
von-ampe hòa tan

How to Cite

1.
Vũ NH, Vũ T, Huỳnh NT, Nguyễn MT. TiO2/rGO: Synthesis and application to cadmium and lead simultaneous determination by stripping voltammetry. hueuni-jns [Internet]. 2022Sep.30 [cited 2024Nov.23];131(1C):139-46. Available from: http://222.255.146.83/index.php/hujos-ns/article/view/6882
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Abstract

In this paper, graphite powder was used to produce graphene oxide (GO), which was then reduced by ascorbic acid to gain reduced graphene oxide (rGO) with the Hummer method. Nano titanium dioxide (TiO2) is physically and chemically stable and used in numerous environmental applications. Reduced graphene oxide was modified with TiO2. The obtained TiO2/rGO was characterized by using X-ray diffraction, scanning electron microscopy and nitrogen adsorption/desorption isotherms. The synthesized material was applied to modify a glassy carbon electrode for the simultaneous determination of cadmium and lead with differential pulse anodic stripping voltammetry (DP-ASV). The method yielded a high sensitivity (0.329 ± 0.005 and 0.346 ± 0.004 μA/ppb for CdII and PbII), low detection limit (3.17 ppb and 2.42 ppb for CdII and PbII) and a good linear correlation between Ip and the metal concentration in the range of 6–80 ppb for both metals (R2 ≥ 0.998).

https://doi.org/10.26459/hueunijns.v131i1C.6882
PDF (Vietnamese)

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