Polyoxometalate-based crystalline catalytic materials for efficient electrochemical detection of Cr(VI)

Wang, Yali; Ma, Yuanyuan; Zhao, Qing; Hua, Lu; Han, Zhangang

doi:10.1016/j.snb.2019.127469

Cited by 80 publications

(45 citation statements)

References 53 publications

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“…Anti-interference ability is one of the very important factors of electrochemical sensors. [57] We simulate the complex natural water environment by adding a series of simple metal ions (K + , Na + , Co 2 + , Ni 2 + , Ca 2 + , Cd 2 + and Zn 2 + ) and inorganic anions (CO 3 2À , HCO 3 À , CH 3 COO À , SO 4 2À , Cl À and Br À ) to Cr 2 O 7 2À and NO 2…”

Section: Selectivity and Sensitivity Of The As-prepared Sensormentioning

confidence: 99%

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

et al. 2021

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The development of POM‐based coordination polymers (CPs) provides a promising chance to approach excellent bifunctional electrode materials. Herein, three new polyoxometalates (POMs)‐based three‐dimensional (3D) inorganic‐organic hybrid compounds, [HPMVI9MV3O40]CuI5[4‐atrz]6⋅XH2O [M=Mo(1) or W(2), X=1(1)], [H2SiMoVI9MoV3O40]CuI5[4‐atrz]6⋅H2O (3) have been synthesized via hydrothermal reaction and explored as pseudocapacitive and sensors electrode materials. These compounds possess a novel three‐dimensional sandwich structure formed from POMs and ring CuI‐4‐atrz complexes by using Cu1 as nodes. As capacitor electrode materials, compounds 1 and 3 with Mo‐containing POMs show much higher specific capacitance than 2, which is because that POMs with Mo as metal atoms have much higher oxidation capacity than those with W. When these compounds are used as sensors to detect NO2− and Cr2O72−, compound 3 shows the highest sensitivity, lowest detection limit and most excellent anti‐interference ability. These results indicate that combining POMs and CuI‐4‐atrz complexes to form POM‐based coordination polymers with unique microstructures greatly improve the electrochemical performance and stability of traditional POMs as electrode materials, which are attributed to excellent redox properties of POMs, and unique three‐dimensional structure formed due to introduction of Cu‐4‐atrz complex. This work provides a promising direction for exploring novel bifunctional electrode materials.

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Section: Selectivity and Sensitivity Of The As-prepared Sensormentioning

confidence: 99%

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

et al. 2021

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“…Besides, the utilization of such nanomaterial for sensor modification leads to a great enhancement in sensitivity. Yali Wang et al [ 39 ] have developed a novel amperometric sensor for Cr(VI) monitoring in lake water. Carbon black was introduced into the fabrication of the working electrode allowing the enhancement of the electroconductivity of the synthesized polyoxometalate based isomorphous crystalline materials destined for Cr(VI) analysis.…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

“…The developed sensor displays a good sensitivity of 2.79 μA·μM −1 ·cm −2 and reached detection limit of 0.52 µg·L −1 [ 40 ]. However, the dispersion of polyoxometalate-carbon black in nafion solution [ 39 ] decreases the accessibility of the carbon black mesopores. It is supposed that, most likely, a repulsion between nafion and chromate anion took place resulting in low sensitivity and high detection limit compared to the carbon black modified GCE [ 40 ].…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

“…Three types of phosphomolybdates {P 4 Mo 6 } cluster based crystalline materials were synthesized with three different central metals (Co, Ni and Cd). The GCE modified by the synthesized material with Co as a central metal provides the highest current response to Cr(VI) with high sensitivity in a range of (52 to 39,312 µg·L −1 ), a detection limit of 2.7 µg·L −1 which might be due to the synergistic effect between the phosphomolybdate and central Co metal [ 39 ]. Later, the same team [ 98 ] has reported an electrochemical sensor based on two reductive POMs based crystalline material for Cr(VI) determination.…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

“…Nowadays, great efforts have been provided to the utilization of polyoxometalates (POMs) as functional catalysts in several applications among them catalysis [86][87][88], energy conversion [89][90][91] electronics and biosensors [92][93][94][95][96][97]. Recently, Zhangang Han et al [39] have published two papers about the elaboration of POMs based sensors for Cr(VI) detection. Three types of phosphomolybdates {P 4 Mo 6 } cluster based crystalline materials were synthesized with three different central metals (Co, Ni and Cd).…”

Section: Other Sensorsmentioning

confidence: 99%

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Hilali

Mohammadi

Amine

et al. 2020

Sensors

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The extensive use of chromium by several industries conducts to the discharge of an immense quantity of its various forms in the environment which affects drastically the ecological and biological lives especially in the case of hexavalent chromium. Electrochemical sensors and biosensors are useful devices for chromium determination. In the last five years, several sensors based on the modification of electrode surface by different nanomaterials (fluorine tin oxide, titanium dioxide, carbon nanomaterials, metallic nanoparticles and nanocomposite) and biosensors with different biorecognition elements (microbial fuel cell, bacteria, enzyme, DNA) were employed for chromium monitoring. Herein, recent advances related to the use of electrochemical approaches for measurement of trivalent and hexavalent chromium from 2015 to 2020 are reported. A discussion of both chromium species detections and speciation studies is provided.

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N‐Doped Carbon Coated TiC Nanofiber Arrays on Ti‐6Al‐4V for Sensitive Electrochemical Determination of Cr(VI)

et al. 2021

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A sensitive electrochemical sensor for Cr(VI) detection based on N-doped carbon coated TiC nanofiber arrays (TiC@CNx NFAs) is reported. The abundant electrocatalytic active sites contained CNx shell, highly conducting TiC core, and good electrical contact between the TiC@CNx and underlying Ti alloy endow this electrode with the excellent electrochemical sensing properties. The developed electrochemical sensor shows remarkable determination activity towards Cr(VI) with a high sensitivity of 0.88 μA μM À 1 cm À 2 , a low detection limit of 4.0 nM (S/N = 3), a wide linear range from 0.2 to 24.1 μM, good selectivity and anti-interference property.

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Polyoxometalate-based crystalline catalytic materials for efficient electrochemical detection of Cr(VI)

Cited by 80 publications

References 53 publications

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

Recent Advances in Electrochemical Monitoring of Chromium

N‐Doped Carbon Coated TiC Nanofiber Arrays on Ti‐6Al‐4V for Sensitive Electrochemical Determination of Cr(VI)

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