Russian Journal of Biological Physics and Chemisrty Russian Journal of Biological Physics and Chemisrty АКТУАЛЬНЫЕ ВОПРОСЫ БИОЛОГИЧЕСКОЙ ФИЗИКИ И ХИМИИ 2499-9962 54531 МЕДИЦИНСКАЯ БИОФИЗИКА И БИОФИЗИЧЕСКАЯ ХИМИЯ MEDICAL BIOPHYSICS AND BIOPHYSICAL CHEMISTRY МЕДИЦИНСКАЯ БИОФИЗИКА И БИОФИЗИЧЕСКАЯ ХИМИЯ Production of composite from aluminum oxide nanofibers and nanodiamonds and study of its physical and chemical properties Получение композита из нановолокон оксида алюминия и наноалмазов и изучение его физико-химических свойств Ронжин Н О Ronzhin N O roniol@mail.ru Посохина Е Д Posokhina E D Михлина Е В Mikhlina E V Симунин М М Simunin M M Рыжков И И Ryzhkov I I Бондарь В С Bondar V S Институт биофизики ФИЦ КНЦ СО РАН ru Institute of Biophysics FRC KSC SB RAS ru Институт биофизики ФИЦ КНЦ СО РАН; Сибирский федеральный университет ru Institute of Biophysics FRC KSC SB RAS; Siberian Federal University ru Институт вычислительного моделирования ФИЦ КНЦ СО РАН ru Institute of Computational Modeling FRC KSC SB RAS ru Сибирский федеральный университет ru Siberian Federal University ru Сибирский федеральный университет; Институт вычислительного моделирования ФИЦ КНЦ СО РАН ru Siberian Federal University; Institute of Computational Modeling FRC KSC SB RAS ru Институт биофизики ФИЦ КНЦ СО РАН ru Institute of Biophysics FRC KSC SB RAS ru 25 06 2020 25 06 2020 5 2 326 330 20 06 2020 20 06 2020 https://rusjbpc.ru/en/nauka/article/54531/view

Смешиванием коллоидно стабильных водных суспензий нановолокон оксида алюминия (НВОА) и модифицированных наноалмазов (МНА) детонационного синтеза при весовом соотношении компонентов 5:1 с последующей инкубацией смеси при 32 °C и вакуумной фильтрацией изготовлен композиционный материал (НВОА-МНА) в форме диска диаметром 40 мм. Высказано предположение, что образование композита происходит за счет разницы дзета-потенциалов НВОА и МНА, обеспечивающей электростатическое взаимодействие и связывание наноматериалов. Исследования показали, что в водных суспензиях МНА имеют отрицательный дзета-потенциал, составляющий -46.5 мВ, в то время как НВОА - положительный, составляющий 44 мВ. Данные сканирующей и просвечивающей электронной микроскопии показали, что полученный композит имеет сетчатую структуру, в которой кластеры МНА распределены по поверхности НВОА. Результаты низкотемпературной адсорбции азота свидетельствуют, что в сетчатой структуре композита НВОА-МНА наблюдается увеличение размера пор и удельной поверхности, по сравнению с материалом матрицы из НВОА. Установлено, что в составе композита МНА проявляют каталитическую функцию и обеспечивают образование цветного продукта в реакции соокисления фенола с 4-аминоантипирином в присутствии Н2О2. В модельных экспериментах показана применимость композита НВОА-МНА для многократного тестирования фенола в водной среде.

A composite material in the form of disk with a diameter of 40 mm was fabricated by mixing colloidal stable aqueous suspensions of alumina nanofibers (ANF) and detonation synthesized modified nanodiamonds (MND) at a 5:1 weight ratio of components followed by incubating at 32 °C and vacuum filtrating the mixture. It is assumed that the interaction of ANF and MND occurs due to the difference in their zeta-potentials which provides electrostatic attraction and binding of nanomaterials. Measurements showed that in aqueous suspensions MND have a negative zeta potential of -46.5 mV, while ANF is positive, 44 mV. Scanning and transmission electron microscopy data showed that the composite has a network structure in which clusters of nanodiamonds are distributed over the ANF surface. The results of low-temperature nitrogen adsorption experiments showed that in the network structure of the obtained ANF-MND composite an increase in pore size and specific surface area is observed compared with the control material from ANF. It was found that MND incorporated into the composite exhibit a catalytic function and ensure the formation of a colored product in the co-oxidation reaction of phenol and 4-aminoantipyrine in the presence of Н2О2. In model experiments the applicability of the ANF-MND composite for the multiple detection of phenol in an aqueous medium is shown.

 наноалмазы нановолокна оксида алюминия композит катализатор система индикации фенол nanodiamonds aluminum oxide nanofibers composite catalyst indicator system phenol

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