maleic-acid has been researched along with titanium-dioxide* in 3 studies
3 other study(ies) available for maleic-acid and titanium-dioxide
| Article | Year |
|---|---|
Adsorption of Maleic Acid Monomer on the Surface of Hydroxyapatite and TiO
Poly(styrene- alt-maleic acid) adsorption on hydroxyapatite and TiO Topics: Adsorption; Biocompatible Materials; Durapatite; Maleates; Titanium | 2018 |
Fabrication of Bi2O3/TiO2 nanocomposites and their applications to the degradation of pollutants in air and water under visible-light.
A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light (lambda > or = 420 nm) was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was employed as an organic binder to unite Bi2O3 and TiO2 nanoparticles. The SEM, TEM, XRD and diffuse reflectance spectra were utilized to characterize the prepared Bi2O3/TiO2 nanoheterojunction. The nanocomposite exhibited unusual high photocatalytic activity in decomposing 2-propanol in gas phase and phenol in aqueous phase and, evolution of CO2 under visible light irradiation while the end members exhibited low photocatalytic activity. The composite was optimized to 5 mol% Bi2O3/TiO2. The remarkable high photocatalytic efficiency originates from the unique relative energy band position of Bi2O3 and TiO2 as well as the absorption of visible light by Bi2O3. Topics: Air Pollutants; Bismuth; Maleates; Nanocomposites; Photolysis; Titanium; Water Pollutants | 2014 |
Determination of iron limiting values according to PH. EUR. using 1,3-dibromo-5,5-dimethylhydantoin (DBH) instead of elemental bromine. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 8.
PH. EUR. 2002 uses elemental bromine performing iron limit tests for maleic acid (iron 5 ppm) and titanium dioxide (iron 200 ppm). 1,3-Dibromo-5,5-dimethylhydantoin (DBH) can replace bromine water. For the iron limit test of maleic acid bivalent iron is oxidized to trivalent iron by bromine resp. DBH, because the unsaturated, in high concentration existing acid reacts substantially slower. On the other hand maleic acid removes the excess of bromine. The bromine oxidation for the iron limiting values of titanium dioxide according to the pharmacopoeia is not required. Metallic iron as well as ferrous salts are converted to trivalent iron, when the titanium test solution is prepared by boiling with concentrated sulphuric acid in the presence of anhydrous sodium sulphate. Topics: Bromine; Europe; Ferrous Compounds; Hydantoins; Indicators and Reagents; Iron; Maleates; Oxidation-Reduction; Pharmacopoeias as Topic; Photochemistry; Solutions; Titanium | 2002 |