Tungsten-based Lindqvist and Keggin type polyoxometalates as efficient photocatalysts for degradation of toxic chemical dyes.

Photocatalytic dye degradation employing polyoxometalates (POMs) has been a research focus for several years. We report the facile synthesis of tungsten-based Lindqvist and Keggin-type POMs that degrade toxic chemical dyes, methyl orange (MO) and methylene blue (MB), respectively. The Lindqvist POM, sodium hexatungstate, NaWO, degrades MO under 100 W UV light irradiation within 15 min, whereas the Keggin POM, AgPWVO, degrades MB under 20 W visible light source within 180 min.

Correction: The corrosion inhibition of stainless steel by ferrocene-polyoxometalate hybrid molecular materials - experimental and first principles studies.

Correction for 'The corrosion inhibition of stainless steel by ferrocene-polyoxometalate hybrid molecular materials - experimental and first principles studies' by G. Sruthi et al., Phys.

The corrosion inhibition of stainless steel by ferrocene-polyoxometalate hybrid molecular materials - experimental and first principles studies.

The hybrid molecular materials [Fe(CH)][PWO]·(HO) and [Fe(CH)][PMoO]·(HO), denoted respectively as FcPW and FcPMo, are synthesized via a co-precipitation method under acidic conditions (pH: ∼2-3). The molecular properties of these compounds are investigated via various analytical methods. UV-vis diffuse reflectance and photoluminescence studies confirm that these compounds are charge-transfer salts.

Probing the electric double-layer capacitance in a Keggin-type polyoxometalate ionic liquid gated graphene transistor.

A variety of device applications has been proposed using polyoxometalate-based ionic liquids. However, the assembly of large polyoxometalate ions on surfaces and the associated interfacial properties are not well understood, particularly since the assembly is influenced by steric effects and stronger ion-ion interactions. In this study, graphene transistors gated with a polyoxometalate-based ionic liquid were probed with in situ Raman spectroscopy and charge transport studies.