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Enhanced photochromic response of ormosil-phosphotungstate nanocomposite coatings doped with TiO2 nanoparticles
(Springer, 2015-11-01)
Photochromic ormosil-phosphotungstate hybrid materials were prepared by immobilizing phosphotungstic acid, H3PW12O40, (HPW) in hybrid organic-inorganic ormosil matrices via sol-gel route, and the effect of addition of TiO2 ...
Casting and inkjet printable photochromic films based on polymethylmethacrylate – Phosphotungstic acid
(2019-10-01)
The incorporation of polyoxometalates in suitable matrices has been a main effort to produce transparent photochromic materials. Polymeric films based on high transparent polymethylmethacrylate (PMMA) containing phosphotungstic ...
Tailored Brønsted and Lewis surface acid sites of the phosphotungstic Wells Dawson heteropoly-acid
(Elsevier Science, 2019-11)
The synthesis of transition metals Wells Dawson heteropoly salts along with their elemental composition, water content, structure and specific surface area were thoroughly investigated. Additionally, the use of a molecular ...
Self-Supported Smart Bacterial Nanocellulose–Phosphotungstic Acid Nanocomposites for Photochromic Applications
(2021-05-13)
Bacterial nanocellulose (BNC) is a natural biopolymer obtained by gram-negative bacteria by means of a green and inexhaustible biotechnological process using glucose as producing source. BCN hydrogels is formed by cellulose ...
Phosphotungstic acid impregnated niobium coated superparamagnetic iron oxide nanoparticles as recyclable catalyst for selective isomerization of terpenes
(2021-04-01)
Conversion efficiency as high as 80–100% and 50% selectivity for camphene and limonene was achieved
with low production of polymeric byproducts (18–28%), easy recovery with a magnet and reuse for up to
five cycles ...
Surface structure and reactivity study of phosphotungstic acidnitrogenated ormosils
(Springer, 2013-06)
Supramolecular interactions between nitrogenated groups in hybrid ormosils bearing phosphotungstate nanocatalyst were used to tune the photocatalytical activity of these class-II hybrid materials obtained through sol–gel ...
Synthesis and characterization of nanoparticulate silica with organized multimodal porous structure impregnated with 12-phosphotungstic acid for its use in heterogeneous catalysis
(Elsevier Science, 2018-10-16)
Mesoporous silica (MESSI) nanoparticles with ordered mesoporous frameworks were successfully obtained using the triblock copolymer P123 as the mesoporous template and agar as micropore former. The agar/TEOS ratio influences ...
Acylating Capacity of the Phosphotungstic Wells-Dawson Heteropoly Acid: Intermediate Reactive Species
(American Chemical Society, 2011-01)
The mechanism of adsorption and decomposition of acetic anhydride over phosphotungstic Wells-Dawson heteropoly acid (HPA) was investigated through infrared spectroscopy with especially dedicated in situ cells. Both gaseous ...