Research progress on detection of Cr(Ⅵ) by electrochemically modified electrode

doi:10.16085/j.issn.1000-6613.2022-1354

Abstract

Abstract:

With the increasing demand for hexavalent chromium ions detection, electrochemical detection has been widely concerned because of its advantages of high efficiency and economy. This review presented the application of different electroactive layer modified electrodes for the detection of Cr( $Ⅵ$ ), comparing the detection effect of different modified electrode materials for Cr( $Ⅵ$ ) and their respective advantages and disadvantages including inorganic nanomaterials (nano-carbon materials, nano-metals and metal oxides), and organic polymers and organic molecular composites. This review summarized the behavioral mechanisms of different modified electrodes in the detection of Cr( $Ⅵ$ ), which were divided into four main categories detection mechanisms: including electrostatic adsorption mechanism of lignin-poly(propylene oxide) copolymer, formation of complexes between nitrogen heterocrown and HCrO $4 -$ impeding electron transfer, Cr⁶⁺ induced disulfide bond formation causing rGO channel resistance changes and detection of pp-junction interface potential barriers as a driving factor. Finally, prospects were given for the optimal design of the modified electrodes, the improvement of their selectivity, stability and interference immunity, and the enhancement of the detection capability of bare glassy carbon electrodes.

Key words: electrochemistry, chromium(Ⅵ), nanomaterials, organic composites, adsorption

摘要：

随着对六价铬离子检测需求的不断增加，电化学检测因其高效、经济等优点而受到广泛关注。本文介绍了不同电活性层修饰电极在六价铬检测方面的应用，比较了不同修饰电极材料对六价铬的检测效果和各自的优缺点，包含无机纳米材料（纳米碳材料、纳米金属及金属氧化物）和有机聚合物、有机分子复合材料，并总结了不同修饰电极在检测六价铬过程中的行为机理，主要分为四类检测机制：包括木质素-聚(环氧丙烷)共聚物的静电吸附机理、氮杂冠与HCrO $4 -$ 形成络合物阻碍电子转移、Cr⁶⁺诱导二硫键形成引起rGO通道电阻变化以及pp结界面势垒作为驱动因素的检测机理。最后对修饰电极的优化设计、改善其选择性、稳定性及抗干扰能力，以及提升裸玻碳电极检测能力提出了展望。

关键词: 电化学, 六价铬, 纳米材料, 有机材料, 吸附（作用）

CLC Number:

O657

CHEN Shaohua, WANG Yihua, HU Qiangfei, HU Kun, CHEN Li’ai, LI Jie. Research progress on detection of Cr(Ⅵ) by electrochemically modified electrode[J]. Chemical Industry and Engineering Progress, 2023, 42(5): 2429-2438.

陈少华, 王义华, 胡强飞, 胡坤, 陈立爱, 李洁. 电化学修饰电极在检测Cr(Ⅵ)中的研究进展[J]. 化工进展, 2023, 42(5): 2429-2438.

Figures/Tables 10

References 69

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修饰材料	制备方法	检测方法	检测限	参考文献
rGO/GCE	GO化学还原	DPCSV	0.15μmol/L	[28]
ZrO₂改性MNPZs	共沉淀法	CV EIS	45nmol/L	[32]
[Co(P ₄ Mo₆O₃₁)₂]	溶剂热法	CA	0.026μmol/L	[33]
花状AuNPs	自组装	CSSWV	2.9ng/L	[34]
TiO₂-rGO	水热法	CA	0.006µg/L	[39]
Bi/SWNTs/GCE	电沉积	ADCSV	0.036nmol/L	[40]
TiC@CN _x NFAs	水热法	i-t	4.0nmol/L	[41]
AWNT	溶胶凝胶法	SWV	0.8μg/L	[42]

修饰材料	制备方法	检测方法	检测限	参考文献
rGO/GCE	GO化学还原	DPCSV	0.15μmol/L	[28]
ZrO₂改性MNPZs	共沉淀法	CV EIS	45nmol/L	[32]
[Co(P ₄ Mo₆O₃₁)₂]	溶剂热法	CA	0.026μmol/L	[33]
花状AuNPs	自组装	CSSWV	2.9ng/L	[34]
TiO₂-rGO	水热法	CA	0.006µg/L	[39]
Bi/SWNTs/GCE	电沉积	ADCSV	0.036nmol/L	[40]
TiC@CN _x NFAs	水热法	i-t	4.0nmol/L	[41]
AWNT	溶胶凝胶法	SWV	0.8μg/L	[42]

修饰材料	制备方法	检测方法	检测限	参考文献
BGE/PPy/Cr	电聚合	DPM	0.5μmol/L	[45]
PANI/Hep/MTA/MGCE	电镀	DPV	0.87mol/L	[46]
PcIrCl/GCE	水热法	CV	0.36μg/L	[47]
GCE/Nf/Agnano	电沉积	AC	0.67μg/L	[52]
CNF@Binol-Redox	原位氧化还原	DPV	0.954μmol/L	[53]
TOPO	化学气相沉积	EIS	0.01mmol/L	[58]
[Co₂(4-dptb)₂(1,3-BDC)₂]·2H₂O	水热法	i-t	6.51μmol/L	[59]

修饰材料	制备方法	检测方法	检测限	参考文献
BGE/PPy/Cr	电聚合	DPM	0.5μmol/L	[45]
PANI/Hep/MTA/MGCE	电镀	DPV	0.87mol/L	[46]
PcIrCl/GCE	水热法	CV	0.36μg/L	[47]
GCE/Nf/Agnano	电沉积	AC	0.67μg/L	[52]
CNF@Binol-Redox	原位氧化还原	DPV	0.954μmol/L	[53]
TOPO	化学气相沉积	EIS	0.01mmol/L	[58]
[Co₂(4-dptb)₂(1,3-BDC)₂]·2H₂O	水热法	i-t	6.51μmol/L	[59]

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