Photocatalytic degradation of dyes using phosphotungstate-hexamine hybrid under sunlight and UV irradiation: A combined experimental and DFT study

Taghdiri, Mehdi; Mirhoseini, Hadi; Doolabi, Shahrban Dadari; Behjatmanesh–Ardakani, Reza

doi:10.1080/2374068x.2022.2141670

Cited by 3 publications

(1 citation statement)

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“…The presence of two electron trappers i.e., Ag and embedded PTA ensure continuous transfer of electrons and also prevent charge reintegration [22]. Recently, hexamine-phosphotungstic acid hybrids have been reported to cause 90% degradation of methyl orange and methyl red, where degradation occurred four folds faster upon exposure to UV light than solar light irradiation [23]. The bandgap is narrowed from 3.31 eV to 3.14 eV when PTA is converted to corresponding ammonium salt.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical synthesis of ionic solids based on phosphotungstic acid and triethylamine for photocatalytic dye degradation

Shah,

Bibi,

Ali

et al. 2023

Phys. Scr.

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Ionic solid catalysts (TTA) based on phosphotungstic acid (PTA) and triethylamine (TEA) were prepared by mechanochemical/thermal treatment of mixtures possessing different mole fractions of constituents under solventless conditions. In contrast to PTA, ionic solids had high thermal stability and they were insoluble in water. Hence, they could be used in heterogeneous catalysis and recycled. The crystallite sizes of selected ionic solids were  24 and 30 nm as obtained by Scherrer and Williamson-Hall plots in X-Ray diffraction analysis (XRD). Scanning electron microscopy, vibrational spectroscopy, and XRD showed that the Keggin structure of PTA was retained in ionic solids. The catalyst was studied for its effectiveness in sunlight aided degradation of Erichrome black T (EBT) dye. Most ionic solids with XPTA exceeding 0.5 showed superior photocatalytic activity compared to PTA with degradation reaching 87% with 6.0 mg of TTA5 (with PTA/TEA = 5/5) in solution containing 10 mM of EBT. 

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Section: Introductionmentioning

confidence: 99%