期刊信息

  • 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
  • 主办： 河北师范大学
  • ISSN： 1000-5854
  • CN： 13-1061/N
  • 中国科技核心期刊
  • 中国期刊方阵入选期刊
  • 中国高校优秀科技期刊
  • 华北优秀期刊
  • 河北省优秀科技期刊

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沙漏型磷钼酸盐的合成表征及其电检测Cr(Ⅵ)性能研究

  • 河北师范大学 化学与材料科学学院, 河北省功能有机分子重点实验室, 国家实验化学教育示范中心, 河北 石家庄 050024
  • DOI： 10.13763/j.cnki.jhebnu.nse.202103008

Synthesis and Characterization of Hourglass-type Phosphomolybdate for Electrochemical Detection of Cr(Ⅵ)

摘要/Abstract

摘要：

6价铬离子是具有高致癌性的剧毒污染物之一，可以改变人类DNA转录过程，导致严重的染色体畸变.考虑到Cr（Ⅵ）在生物和环境系统中的高溶解度和迁移性，开发一种廉价灵敏的Cr（Ⅵ）检测方法具有重要的现实意义. 通过水热法合成了一例沙漏型磷钼酸盐化合物用于电化学检测Cr（Ⅵ），其分子式为[Mn2（H2O）4Na4（H2O）4]{Mn[P4Mo6O31H7]2}·13H2O.实验结果表明，这种晶体对电化学检测Cr（Ⅵ）具有良好的性能. 它的线性浓度范围为5~510μmol/L，灵敏度为120μA/（mmol·L-1），检测限低至0.081μmol/L，完全符合世界卫生组织对于水系统中Cr（Ⅵ）的浓度标准，且具有较好的稳定性和抗干扰能力. 该研究为在实际的环境水系统中检测Cr（Ⅵ）提供了一种廉价便捷的方法.

Abstract：

Hexavalent chromium ion is one of the most toxic pollutants with high carcinogenicity that can change the human DNA transcription process and cause severe chromosomic aberration. Considering the high solubility and mobility of Cr(Ⅵ) in biological and environmental systems,it is ofgreat practical significance to develop a low-cost and sensitive method for the detection of Cr(Ⅵ). In this paper, a case of hourglass-type phosphomolybdate[Mn2(H2O)4Na4(H2O)4]{Mn[P4Mo6O31H7]2}·13H2O was synthesized by hydrothermal method for electrochemical detection of Cr(Ⅵ). The experimental results show that this crystal hasgood performance for electrochemical detection of Cr(Ⅵ) with a wide linear concentration range from 5~510μmol/L, sensitivity of 120 μA/(mmol·L-1), a low detection limit of 0.081μmol/L, which meets the WHO standard for Cr(Ⅵ) concentration in water systems.Moreover, it also has good stability and anti-interference ability. This work provides a low-cost and convenient method for detecting Cr(Ⅵ) in actual environmental water systems.

关键词

关键词： 多酸 ; 沙漏型磷钼酸盐 ; 水热合成 ; 电化学检测 ; Cr(Ⅵ)
Key words： polyoxometalate ; hourglass-type phosphomolybdate ; hydrothermal synthesis ; electrochemical detection ; Cr(Ⅵ)

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