基于4-巯基苯甲酸和聚乙烯亚胺功能化纳米银的Cr3+检测研究

doi:10.19964/j.issn.1006-4990.2023-0143

Abstract

Abstract:

Heavy metal ions in water caused serious damage to the ecological environment and human health.Therefore，it is great significant to detect heavy metal ions in water ecological environment.Aiming at improving the sensitivity for heavy metal detection in aqueous solution，functional silver nanoparticles modified by 4-mercaptobenzoic acid and polyethyleneimine were synthesized to construct the detection system for chromium ions.The effects of different concentrations of modifiers and the pH of the detection system on the detection system were investigated.The results showed that the detecting platform had great results when the concentration of 4-mercaptobenzoic acid and polyethyleneimine were 1×10^-6 mol/L and 2×10^-8 g/mL，respectively，and the pH value was 9.73.Under the optimum conditions，the detection limit of Cr³⁺ could reach as low as 8×10^-7 mol/L with the curve equation（R²=0.997） from 1×10^-5 mol/L to 8×10^-7 mol/L.In addition，the detection system could effectively resist the interferents of Al³⁺，Ni²⁺，K⁺，Sr²⁺，Co²⁺，Cu²⁺，Fe³⁺，Zn²⁺.At Cr³⁺ concentration of 8×10^-7~1×10^-5 mol/L，it was followed the curve equation y=0.059 06+0.504 02/［1+10^{（2.593 49×10 -}^x^）×569 909.68］（R²=0.997）.It had great application value in detecting the concentration of Cr³⁺ in sewage.

Key words: silver nanoparticles, chromium ion, polyethyleneimine

CLC Number:

TQ136.11

ZU Minghua, CAO Yapeng, LI Heng, LIU Yumin, ZHANG Zhikun. Study on Cr³⁺ detection based silver nanoparticles modified with 4-mercaptobenzoic acid and polyethyleneimine[J]. Inorganic Chemicals Industry, 2024, 56(4): 78-84.

Figures/Tables 12

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References 20

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样品	实际浓度/ （mol∙L^-1）	检测浓度/ （mol∙L^-1）	回收率/ %
1	3×10^-6	3.3×10^-6	110.0
2	3×10^-6	3.16×10^-6	105.3
3	3×10^-6	3.2×10^-6	106.7
4	6×10^-6	5.3×10^-6	88.3
5	6×10^-6	5.1×10^-6	85.0

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Inorganic Acid-Base-Salt Committee of CIESC

Study on Cr³⁺ detection based silver nanoparticles modified with 4-mercaptobenzoic acid and polyethyleneimine

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