Investigation of amino acids as templates for the sol–gel synthesis of mesoporous nano TiO2 for photocatalysis

Abstract: TiO2 nanoparticulates of well-defined size were synthesized using amino acid templates employing sol–gel method. Eight different amino acids were studied. The samples were characterized by various methods such as X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, Brunauer–Emmett–Teller surface area measurement, and transmission electron microscopy. Of the amino acids used, catalyst employing aspartic acid was found to have minimum particle size of 10.4 nm and maximum surface area of 95.3 m2/g. The catalytic activity of the prepared TiO2 samples was compared with Degussa-P25 catalyst for direct sunlight photodegradation of methylene blue and calmagite dyes. Catalyst prepared form branched amino acids, proline, valine, and aspartic acids, were found to give better results. Based on infrared spectroscopy studies, it is proposed that amino acids act as a surfactant by hydrogen bonding between the hydrogen of the ammonium ion and the surface hydroxyl group of the colloid. © 2017, Springer-Verlag GmbH Austria.

Авторы
Bakre P.V.1 , Tilve S.G. 1, 2 , Ghosh N.N.3
Журнал
Издательство
Springer Wien
Номер выпуска
1
Язык
Английский
Страницы
11-18
Статус
Опубликовано
Том
149
Год
2018
Организации
  • 1 Department of Chemistry, Goa University, Goa, India
  • 2 Organic Chemistry Department, RUDN University, 6 Miklukcho-Maklaya Str., Moscow, 117198, Russian Federation
  • 3 Nano-Materials Lab, Department of Chemistry, Birla Institute of Technology and Science Pilani, KK Birla Goa Campus, Goa, India
Ключевые слова
Calmagite; Catalyst; Methylene blue; Nanochemistry; Photodegradation
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/7282/