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0415U000895,
к.х.н.
02-04-2015
o
Synthesis and properties of nanocomposites based on silica-titania doped by metal oxides
Nazarkovsky Michael Aleksandrovich,
popup.head Gun'ko Vladimir Moiseevich
popup.opponent Шерстюк Валентин Петрович
popup.opponent Хоменко Костянтин Миколайович
popup.opponent Строюк Олександр Леонідович
Дисертацію присвячено з'ясуванню впливу оксидів-допантів (CuO, SnO2 або NiO) на (1) фазовий склад, (2) морфологію титанокремнеземів, (3) заряд та (4) склад їх поверхні, (5) електронну будову та (6) фотокаталітичні властивості в процесі фотоокиснення антропогенних органічних забруднювачів (кофеїну, бісфенолу А). Показано, що у титанокремнеземах допанти викликають нелінійні зміни у властивостях результуючих продуктів, зокрема це стосується морфології, фазового складу, заряду поверхні. У процесах фотоконверсії кофеїну загальне підвищення каталітичної активності у матеріалів, допованих CuO, обернено пропорційне концентрації допанту (активність зразка при СCuO = 1 мас.% перевищує таку у Р25 (Evonik) в п'ять разів). Однак підвищення вмісту NiO викликає загальну інтенсифікацію ефективності титанокремнеземних фотокаталізаторів (найбільш ефективним виявився зразок при СNiO = 10 мас.%, чия активність вища майже у 3 рази порівняно з Р25). Допант SnO2 в певному концентраційному діапазоні продемонстрував здатність ініціювати низькотемпературну кристалізацію анатазу. Фотокаталітичні властивості матеріалів SiO2/TiO2/SnO2 нелінійно залежать від вмісту SnO2. Встановлено, що феритокремнеземи, вкриті ТіО2, проявляють лінійні та прогнозовані залежності фізико-хімічних властивостей від свого кількісного та якісного складу.
2015-04-02
2020-04-03
Updated: 2025-12-07
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