Citation: ZHANG Cui-Zhong, LIAN Huan, YANG Wei, ZHUGE Wen-Feng, TANG Xiao-Qiang, GUO Yang-Yang, PENG Jin-Yun, LI Fu-Yan. Electrochmical Sensing Platform for Detection of Lead(Ⅱ) and Cadmium(Ⅱ) Based on Mixed-Aerogels Loaded with Bismuth Nanoparticles[J]. Chinese Journal of Analytical Chemistry, ;2022, 50(8): 1233-1242. doi: 10.19756/j.issn.0253-3820.210771 shu

Electrochmical Sensing Platform for Detection of Lead(Ⅱ) and Cadmium(Ⅱ) Based on Mixed-Aerogels Loaded with Bismuth Nanoparticles

1.
Photochemical Sensing and Regional Environmental Analysis Laboratory, Chemical and Biological Engineering College, Guangxi Normal University for Nationalities, Chongzuo 532200, China;
2.
School of Chemisty and Chemical Engineering, Guangxi University, Nanning 530004, China

Corresponding author: PENG Jin-Yun, LI Fu-Yan,
Received Date: 29 September 2021
Revised Date: 29 May 2022

Fund Project: Supported by the Universities in Guangxi Young and Middle-Aged Teachers' Basic Ability Improvement Projects (Nos.2021KY0771, 2019KY0788, 2021KY0768), the Project of Chongzuo Science and Technology Bureau (No.FA2020019) and Guangxi Normal University for Nationalities,China (Nos.2018YB032, 2021YB041, 2021YB038).

Heavy metals have the characteristics of low concentration, high toxicity and biological undegradability. The heavy metal ion pollution of environmental water systems pose a great threat to human health. In this work, carboxy carbon nanotubes (MWCNT-COOH) and dialyzed graphene oxide (GO) were bonded to form a 3D mixed-aerogels (MAs) of hierarchical porous structure with polydopamine (PDA) as the "cross-linking agent", similar to "cabbage-like". Bismuth nanoparticles (BiNPs) were loaded in situ on MAs as the substrate to construct an electrochemical sensor. Differential pulse stripping voltammetry (DPSV) was used to detect Pb²⁺ and Cd²⁺ simultaneously. The linear ranges were 5-500 ng/L and 0.5-70 μg/L, and the corresponding detection limits (S/N=3) were 0.13 ng/L and 0.49 ng/L for Pb²⁺ and Cd²⁺, respectively. The experimental results showed that the sensor had high accuracy, high stability and anti-interference properties. The sensor was expected to be of great significance for simultaneous detection of heavy metals.
- Mixed-aerogels,
- Hierarchical porous structure,
- Bismuth nanoparticles,
- Differential pulse stripping voltammetry,
- Lead,
- Cadmium
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