Physical-chemical and photocatalytic studies of equimolar composition ZnO-SnO2 modified via hydrothermal and thermal treatment
Journal Title: Хімія, фізика та технологія поверхні - Year 2017, Vol 8, Issue 2
Abstract
We studied the interaction in mixture of low-dispersed crystalline zinc and tin oxides as well as in their coprecipitated X-ray amorphous composition under hydrothermal and thermal treatment. The aims of work were the study of phase composition and porous structure of obtained products as well as evaluation of their photocatalytic activity under visible light. We used XRD and DTA-TG analysis, FTIR and UV-Vis spectroscopy, adsorption-desorption of nitrogen and photocatalytic degradation for characterization of prepared oxide compositions. Hydrothermal treatment at 200–300 °C does not lead to formation of new crystal phases. On the other hand, zinc stannates are formed under the same conditions from coprecipitated oxides. Stannates possess high specific surface area (166–227 m2/g) and developed and regulated micro-mesoporous structure (total pore volume – 0.13–0.27 cm3/g). The investigation of Rhodamin B photocatalytic degradation in visible region shows that oxides mixture possesses the higher activity than zinc stannates, although the latter have the higher value of specific surface area. However, accessibility of internal surface of porous stannates for dye molecules is obviously insufficient. The rate constant of photocatalytic degradation of Rhodamine B is 4.6–11.2·10-5 s-1 when modified low-dispersed compositions are used as catalysts. The degree of dye mineralization achieves 57 %.
Authors and Affiliations
V. V. Sydorchuk, S. V. Khalameida, L. O. Davydenko, O. I. Zakutevsky
Keywords
Related Articles
- EP ID EP247812
- DOI 10.15407/hftp08.02.120
- Views 143
- Downloads 0
Nanoparticles of zirconium hydrophosphate framed with a weakly-acidic cation-exchange polymer
Weakly acidic cation exchange resin was modified with nanoparticles of zirconium hydrophosphate. The materials were investigated with methods of standard contact porosimetry and transmission electron microscopy. Both non...
Синтез багатошарового азаграфена та оксиду нітриду вуглецю
Графітоподібний нітрид вуглецю (що характеризується як нетоксичний і хімічно високостійкий матеріал) і його наноструктуровані і доповані, зокрема, киснем, похідні, привертають особливу увагу в якості найбільш перспективн...
Сорбционные свойства сополимеров этиленгликольдиметакрилата и метакриловой кислоты с различной степенью сшивки по отношению к ионам редкоземельных элементов
Методом ионного импринтинга синтезированы сорбционные материалы для редкоземельных элементов на основе сополимеров этиленгликольдиметакрилата и метакриловой кислоты с различной степенью сшивки. Применены два подхода ионн...
Вплив імпульсного електричного поля на поверхневі властивості клітин лактобактерій Lactobacillus plantarum і біогенне формування ультрадисперсного срібла
Досліджено поверхневі біогенні ефекти імпульсного електричного поля в системі клітин лактобактерій L. plantarum в розчинах електролітів. Встановлено вплив параметрів поля (частоти, амплітуди напруги) на зміну гідрофобно...
Formation of antibacterial coatings on chitosan matrices by magnetron sputtering
Chitosan as a biodegradable natural polymer is currently among the most attractive alternatives for the replacement of plastics, metals and other materials in various industries. Biodegradable chitosan matrices find thei...