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Article

Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection

by
Ni Xiao
1,
Wei Weng
2,3,
Ding Tang
4,
Wen Tan
2,
Liye Zhang
2,
Zheyuan Deng
2,
Xiaopeng Chi
2,3,
Jiangang Ku
2 and
Shuiping Zhong
2,3,4,*
1
School of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China
2
Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
3
Fujian Key Laboratory of Green Extraction and High Value Utilization of New Energy Metals, Fuzhou University, Fuzhou 350108, China
4
Zijin Mining Group Co., Ltd., Shanghang, Longyan 364200, China
*
Author to whom correspondence should be addressed.
Molecules 2023, 28(2), 592; https://doi.org/10.3390/molecules28020592
Submission received: 30 November 2022 / Revised: 20 December 2022 / Accepted: 24 December 2022 / Published: 6 January 2023
(This article belongs to the Section Analytical Chemistry)
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Abstract

The direct and rapid determination of trace cobalt ion (Co2+) in the electrolyte of zinc smelting plants is urgently needed but is impeded by the severe interference of extremely high-concentration zinc ions in the solution. Herein, colorimetric detection of Co2+ by the polyvinylpyrrolidone functionalized silver nanoparticles (PVP-AgNPs) is realized in solutions with the Zn/Co ratio being high, up to (0.8–5) × 104, which is located within the ratio range in industrial solution. The high concentration of Zn2+ induces a strong attenuation of Co2+-related signals in ultraviolet-visible (UV-vis) extinction spectra; nevertheless, a good linear range for detecting 1–6 mg/L Co2+ in 50 g/L Zn2+ solution is still acquired. The strong anti-interference toward other metal ions and the mechanism understanding for trace Co2+ detection in such a high-concentration Zn2+ solution are also revealed by systematic analysis techniques. The results extend the AgNPs as colorimetric sensors to industrial solutions, providing a new strategy for detecting trace-metal ions in industrial plants.
Keywords: colorimetric detection; silver nanoparticles; polyvinylpyrrolidone; trace Co2+ determination; industrial high-concentration zinc solution colorimetric detection; silver nanoparticles; polyvinylpyrrolidone; trace Co2+ determination; industrial high-concentration zinc solution
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MDPI and ACS Style

Xiao, N.; Weng, W.; Tang, D.; Tan, W.; Zhang, L.; Deng, Z.; Chi, X.; Ku, J.; Zhong, S. Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection. Molecules 2023, 28, 592. https://doi.org/10.3390/molecules28020592

AMA Style

Xiao N, Weng W, Tang D, Tan W, Zhang L, Deng Z, Chi X, Ku J, Zhong S. Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection. Molecules. 2023; 28(2):592. https://doi.org/10.3390/molecules28020592

Chicago/Turabian Style

Xiao, Ni, Wei Weng, Ding Tang, Wen Tan, Liye Zhang, Zheyuan Deng, Xiaopeng Chi, Jiangang Ku, and Shuiping Zhong. 2023. "Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection" Molecules 28, no. 2: 592. https://doi.org/10.3390/molecules28020592

APA Style

Xiao, N., Weng, W., Tang, D., Tan, W., Zhang, L., Deng, Z., Chi, X., Ku, J., & Zhong, S. (2023). Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection. Molecules, 28(2), 592. https://doi.org/10.3390/molecules28020592

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