Preparation and application of l-cysteine-doped Keggin polyoxometalate microtubes

Shen, Yan; Peng, Jun; Zhang, Huanqiu; Meng, Cuili; Zhang, Fang

doi:10.1016/j.jssc.2011.10.048

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…273 In the gas phase, a combination of ascorbic acid doped H 4 W 12 SiO 40 microtubes or L-cysteine-doped H 4 W 12 SiO 40 is observed to convert to POM blue microtubes upon exposure to ammonia gas. 290,291 The latter is promising for the construction of ammonia gas sensors as it was stated by Krutovertsev et al 292 using polypyrrole doped with various POMs. Recently, Ammam and Easton 267 described sensitive and selective sensors for NO x gases with extended linearities (up to 5500 ppm NO x ) using a hybrid material formed between K 6 P 2 Mo 18 O 62 $nH 2 O and polypyrrole.…”

Section: Application Of Immobilized Poms As Sensorsmentioning

confidence: 93%

Polyoxometalates: formation, structures, principal properties, main deposition methods and application in sensing

2013

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Section: Application Of Immobilized Poms As Sensorsmentioning

confidence: 93%

Polyoxometalates: formation, structures, principal properties, main deposition methods and application in sensing

2013

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“…Reducing PMo 12 to varying extents allowed the development of a skin-specific personalized UV dosimeter for spectrally selective colorimetric differentiation of UVA, UVB, and UVC by the naked eye ( Zou et al, 2018 ). In addition, L-cysteine-doped tungstosilicate (represented in Table 7 as Lcys-SiW 12 ) microtubes have been used to detect ammoniac gas by a colour change from light purple to dark blue ( Shen et al, 2012 ). The result was confirmed by the new absorption bands that appear at 500 and 750 nm, attributed to the d – d transition and the W(V)-W(VI) intervalence-charge transfer that occurred in the doped tungstosilicate microtubes.…”

Section: Polyoxometalates Functionalized Sensorsmentioning

confidence: 99%

Polyoxometalate Functionalized Sensors: A Review

2022

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Polyoxometalates (POMs) are a class of metal oxide complexes with a large structural diversity. Effective control of the final chemical and physical properties of POMs could be provided by fine-tuning chemical modifications, such as the inclusion of other metals or non-metal ions. In addition, the nature and type of the counterion can also impact POM properties, like solubility. Besides, POMs may combine with carbon materials as graphene oxide, reduced graphene oxide or carbon nanotubes to enhance electronic conductivity, with noble metal nanoparticles to increase catalytic and functional sites, be introduced into metal-organic frameworks to increase surface area and expose more active sites, and embedded into conducting polymers. The possibility to design POMs to match properties adequate for specific sensing applications turns them into highly desirable chemicals for sensor sensitive layers. This review intends to provide an overview of POM structures used in sensors (electrochemical, optical, and piezoelectric), highlighting their main functional features. Furthermore, this review aims to summarize the reported applications of POMs in sensors for detecting and determining analytes in different matrices, many of them with biochemical and clinical relevance, along with analytical figures of merit and main virtues and problems of such devices. Special emphasis is given to the stability of POMs sensitive layers, detection limits, selectivity, the pH working range and throughput.

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“…Triacetone triperoxide (TATP), a homemade explosive, is simple to make and sensitive to the selection, but difficult for detection directly. Vapor sensing using arrays made up of only a few distinct sensor materials can differentiate TATP; however, manufacturing a stable sensor has always been difficult since each sensor may experience a device malfunction [71,72]. To identify TATP from other explosives, a sensor array built on a single photonic TiO 2 /PW 11 sensor was created initially, with the excitation wavelength being controlled.…”

Section: Insertion Of Dopant Ions In Pomsmentioning

confidence: 99%