在線閱讀 --自然科學版 2021年3期《沙漏型磷鉬酸鹽的合成表征及其電檢測Cr(Ⅵ)性能研究》
沙漏型磷鉬酸鹽的合成表征及其電檢測Cr(Ⅵ)性能研究--[在線閱讀]
安文婷, 吳昕瑤, 牛佳祺, 馬媛媛, 韓占剛
河北師范大學 化學與材料科學學院, 河北省功能有機分子重點實驗室, 國家實驗化學教育示范中心, 河北 石家莊 050024
起止頁碼: 275--282頁
DOI: 10.13763/j.cnki.jhebnu.nse.202103008
摘要
6價鉻離子是具有高致癌性的劇毒污染物之一,可以改變人類DNA轉錄過程,導致嚴重的染色體畸變.考慮到Cr(Ⅵ)在生物和環境系統中的高溶解度和遷移性,開發一種廉價靈敏的Cr(Ⅵ)檢測方法具有重要的現實意義.通過水熱法合成了一例沙漏型磷鉬酸鹽化合物用于電化學檢測Cr(Ⅵ),其分子式為[Mn2(H2O)4Na4(H2O)4]{Mn[P4Mo6O31H7]2}·13H2O.實驗結果表明,這種晶體對電化學檢測Cr(Ⅵ)具有良好的性能.它的線性濃度范圍為5~510μmol/L,靈敏度為120μA/(mmol·L-1),檢測限低至0.081μmol/L,完全符合世界衛生組織對于水系統中Cr(Ⅵ)的濃度標準,且具有較好的穩定性和抗干擾能力.該研究為在實際的環境水系統中檢測Cr(Ⅵ)提供了一種廉價便捷的方法.

Synthesis and Characterization of Hourglass-type Phosphomolybdate for Electrochemical Detection of Cr(Ⅵ)
AN Wenting, WU Xinyao, NIU Jiaqi, MA Yuanyuan, HAN Zhangang
Hebei Key Laboratory of Organic Functional Molecules, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Materials Science, Hebei Normal University, Hebei Shijiazhuang 050024, China
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.

收稿日期: 2020-11-08
基金項目: 國家自然科學基金(21871076,21901060);大學生課外學術科技創新基金(AE20209302277)

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