Optical band gap engineering of phosphotungstic acid upon hybridization with hexamine-nickel and -cobalt for solar/visible light photocatalysis: a combined experimental and theoretical approach

Taghdiri, Mehdi; Akbarian, Fatemeh; Dehghani-Firoozabadi, Aezam; Behjatmanesh-Ardakani, Reza; Banitaba, Seyed Hossein; Zare-Mehrjardi, Hamid Reza

doi:10.1080/09500340.2023.2241568

Cited by 1 publication

(1 citation statement)

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“…These range from simple doping of titania with heteropoly acid for band-gap alteration or development of highly adsorbing metalorganic framework or simply embedding into conductive polymers such as polyanilines. These engineered nanomaterials have distinctive properties that differ widely from that of phosphotungstic acid [13,17,18].…”

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%