It was found in this work that silicotungstic acid hydrate could be mixed with phosphoric acid (H3PO4, 85%) to make a viscous paste material with high conductivity (10−2 S/cm at room temperature). The STA/H3PO4 paste samples were stable at 80°C in the atmosphere, and at 100°C under constant hu...

Silicotungstic acid (STA) was modified with melamine and mixed matrix membranes containing melamine-modified STA (M-STA) particles were prepared for the pervaporation dehydration of a water–isopropanol (IPA) mixture. The characterization of the membranes was conducted by FT-IR, SEM, EDS, AFM, X...

Thermal analysis data recorded from silicotungstic acid show the existence of stable phases of composition H4SiW12O40·nH2O where n = 24, 14, 6 and 0. FT-IR data confirms the presence of the Keggin anion, SiW12O404−, in each of these phases. In addition, dehydration of the higher hydrates (n > 6...

The thermal behavior of 12-molybdophosphoric acid (PMo12H) was investigated using coupled techniques (IR and Raman spectroscopies, polarography, X-ray diffraction, and catalytic reactivity in methanol oxidation) and compared with results obtained with 12-molybdosilicic acid. The decomposition of...

Thermal behavior of unsupported and silica-supported 12-molybdosilicic acid (with Mo loadings of 17.6 and 9 wt%) are studied by IR spectrometry and catalytic reactivity in the methanol oxidation reaction. In the case of the unsupported acid (SiMo12H), IR and catalytic reactivity measurements sho...

Anhydrous EuI2 is an essential raw material for novel Eu2+-doped halide scintillators such as SrI2:Eu, CsBa2I5:Eu and BaBrI:Eu. An efficient and economic method to produce high purity anhydrous EuI2 is critical for future development and applications of these scintillators. In this paper, the am...

A novel ammonium iodide-promoted arylsulfonylation of quinones with sodium arylsulfinates has been explored. This reaction proceeded smoothly through unique nucleophilic addition reaction and produced the arylsulfonylation products in moderate to good yields. The reactions proceeded efficiently ...

The adsorption mechanisms of NH4+ and Cs+ on phosphomolybdate ion were investigated in detail by density functional theory (DFT). The computational results indicate that [PMo12O40]3− is a cage-like structure formed by the three-membered rings and four-membered rings constructed by the MoO bonds....

In the present paper, new H2S gasochromic nanomaterial of mixed silver nickel ammonium phosphomolybdate synthesized by microwave assisted technique is reported. The microwave treatment was performed in the solid phase using urea and ammonium nitrate as the promoter and oxidizer agents. The desig...

In this study, the thermal decomposition mechanism of ammonium phosphomolybdate hydrate in air and inert gas atmospheres was determined and the intermediate and final products formed during the thermal decomposition were characterized using TGA, DTA, FTIR, XRD, EDS and EGA methods. In the first ...

The abrasive is one of the important influencing factors during the chemical mechanical polishing (CMP) process. Although α-alumina is one of the most commonly used sapphire polishing abrasives due to its high hardness, it often results in surface damage. To receive lower surface roughness and ...

The precipitation and growth behaviour of metatitanic acid particles from titanium sulfate solution were investigated. The metatitanic acid particles were characterised by a laser particle size distribution instrument and a field emission scanning electron microscope (FE-SEM). Precipitation proc...

The particle size and its distribution of metatitanic acid determines the particle size distribution and pigment properties of titanium dioxide pigment, it is great important to characterize the particle size distribution of metatitanic acid particles. Using metatitanic acid slurry hydrolyzed fr...

The methanolysis of jojoba oil has been studied in the presence of tin powder, dibutyltin diacetate (C4H9)2Sn(OOCCH3)2, dioctyltin diacetate (C8H17)2Sn(OOCCH3)2, dibutyltin oxide (C4H9)2SnO, dioctyltin oxide (C8H17)2SnO, diphenyltin oxide (C6H5)2SnO, dibutyltin chloride dihydroxide (C4H9)2Sn(OH)...

Titanium (IV) bis (ammonium lactato) dihydroxide (TALH) was employed to prepare anatase TiO2 sol where titania in a crystallite size of 3 nm. Both the sol and TALH solution were further subjected to be hydrothermal treated at 200 °C to grow the crystallite size be most appropriate for the photo...

Titanium bis-ammonium lactato dihydroxide (TiBALD) precursor is used in place of the traditional sol–gel precursor, titanium tetra-isopropoxide (TTIP), to determine which precursor produces the most photocatalytically active titanium dioxide thin films. Films were deposited on glass substrates ...

Possibilities are demonstrated of varying the modes and conditions of anodic electrocrystallization in order to modify the mechanism of this process and to obtain, together with Tl2O3, other oxide phases on different substrates from Tl+ solutions. Using the methods of voltammetry, chronopotentio...

The electrochemical reduction of CO2 with a Cu electrode was investigated in methanol using potassium hydroxide and rubidium hydroxide supporting salts. The main products from CO2 were methane, ethylene, carbon monoxide and formic acid. The maximum current efficiency for ethylene was of 37.5%, a...

Expansion of mortar specimens prepared with an aggregate of mylonite from the Santa Rosa mylonite zone in southern California was studied to investigate the effect of different alkali ions on the alkali–silica reaction in concrete. The expansion tests indicate that mortar has a greater expansio...

The extraction of rubidium from natural resources has attracted much attention due to its growing application in many fields. This paper presents a novel clean process for extracting rubidium from granitic rubidium ore. The process consists of alkaline leaching, desilication, and solvent extract...