An Electrochemical Sensor Based on a Porous Biochar/Cuprous Oxide (BC/Cu<sub>2</sub>O) Composite for the Determination of Hg(II)

Jin Zou; Jiawei Liu; Guanwei Peng; Haiyan Huang; Linyu Wang; Limin Lu; Yansha Gao; Dongnan Hu; Shangxing Chen

doi:10.3390/molecules28145352

Molecules (Jul 2023)

An Electrochemical Sensor Based on a Porous Biochar/Cuprous Oxide (BC/Cu<sub>2</sub>O) Composite for the Determination of Hg(II)

Jin Zou,
Jiawei Liu,
Guanwei Peng,
Haiyan Huang,
Linyu Wang,
Limin Lu,
Yansha Gao,
Dongnan Hu,
Shangxing Chen

Affiliations

Jin Zou: East China Woody Fragrance and Flavor Engineering Research Center of NF&GA, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China
Jiawei Liu: Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Guanwei Peng: Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Haiyan Huang: Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Linyu Wang: Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Limin Lu: Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Yansha Gao: Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Dongnan Hu: East China Woody Fragrance and Flavor Engineering Research Center of NF&GA, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China
Shangxing Chen: East China Woody Fragrance and Flavor Engineering Research Center of NF&GA, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China

DOI: https://doi.org/10.3390/molecules28145352
Journal volume & issue: Vol. 28, no. 14
p. 5352

Abstract

Read online

Mercuric ion (Hg2+) in aqueous media is extremely toxic to the environment and organisms. Therefore, the ultra-trace electrochemical determination of Hg2+ in the environment is of critical importance. In this work, a new electrochemical Hg2+ sensing platform based on porous activated carbon (BC/Cu2O) modified with cuprous oxide was developed using a simple impregnation pyrolysis method. Differential pulse anodic stripping voltammetry (DPASV) was used to investigate the sensing capability of the BC/Cu2O electrode towards Hg2+. Due to the excellent conductivity and large specific surface area of BC, and the excellent catalytic activity of Cu2O nanoparticles, the prepared BC/Cu2O electrode exhibited excellent electrochemical activity. The high sensitivity of the proposed system resulted in a low detection limit of 0.3 ng·L−1 and a wide linear response in the ranges from 1.0 ng·L−1 to 1.0 mg·L−1. In addition, this sensor was found to have good accuracy, acceptable precision, and reproducibility. All of these results show that the BC/Cu2O composite is a promising material for Hg2+ electrochemical detection.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

About the journal

Abstract

Keywords