Characteristics of Nano Rosette TiO2 Hydrothermally Grown on a Glass Substrate at Different Reaction Time and Acid Concentration

International Journal of Technology

Akhmad Herman Yuwono¹  Nofrijon Sofyan² 

[1] College of Engineering, Mathematics and Science, University of Wisconsin-Platteville, Wisconsin 53818, USA;Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia

关键词: Growth mechanism;    Hydrothermal;    Nano rosette;    Rutile;    Titania;   

DOI  :  10.14716/ijtech.v9i6.2345

学科分类：工程和技术（综合）

来源: Universitas Indonesia

【 摘 要 】

The characteristics of nano rosette TiO2 hydrothermally grown on a glass substrate at different reaction times and acid concentrations has been examined. The hydrothermal reaction was performed at 170°C for 3, 4, 5, and 6 hours whereas the crystallization was achieved through calcination at 450°C for 90 minutes. The growth mechanism was observed by employing the hydrothermal reaction under different acid concentrations: 0%, 12.5%, 25%, and 50% v/v HCl. The morphology, formation, crystallization, and growth mechanism of the nano rosette TiO2 were characterized using a field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD). The electron images showed that after 3 hours of hydrothermal reaction time, the nucleation process has just taken place; the formation of the nano rosette was completed after 6 hours. The results also showed that the acid environment plays a dominant role in determining the three-dimensional (3D) architecture of the nano rosette TiO2. Structural studies from XRD showed that different acid concentrations resulted in different crystalline formations. The nano rosette rutile TiO2 crystal structure was formed after 6 hours of hydrothermal reaction under 1:1 distilled water and HCl with a structure indexed to rutile P42/mnm with lattice parameters of a = 4.557(6) Å and c = 2.940(5) Å.

【 授权许可】

CC BY-NC-ND