A Modified Thermal Treatment Method for the Up-Scalable Synthesis of Size-Controlled Nanocrystalline TitaniaReportar como inadecuado


A Modified Thermal Treatment Method for the Up-Scalable Synthesis of Size-Controlled Nanocrystalline Titania


A Modified Thermal Treatment Method for the Up-Scalable Synthesis of Size-Controlled Nanocrystalline Titania - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

Department of Physics, Faculty of Science, University Putra Malaysia UPM, Serdang 43400, Selangor, Malaysia

2

Department of Radiology, College of Health and Medical Technologies, Baghdad 10047, Iraq

3

Young Researchers and Elite Club, Shahr-e-Qods Branch, Islamic Azad University, Tehran 13115-37541, Iran

4

Shahid Rajaee Branch, Farhangian University, Isfahan 81786-83441, Iran





*

Authors to whom correspondence should be addressed.



Academic Editor: Philippe Lambin

Abstract Considering the increasing demand for titania nanoparticles with controlled quality for various applications, the present work reports the up-scalable synthesis of size-controlled titanium dioxide nanocrystals with a simple and convenient thermal treatment route. Titanium dioxide nanocrystals with tetragonal structure were synthesized directly from an aqueous solution containing titanium IV isopropoxide as the main reactant, polyvinyl pyrrolidone PVP as the capping agent, and deionized water as a solvent. With the elimination of the drying process in a thermal treatment method, an attempt was made to decrease the synthesis time. The mixture directly underwent calcination to form titanium dioxide TiO2 nanocrystalline powder, which was confirmed by FT-IR, energy dispersive X-ray spectroscopy EDX, and X-ray diffraction XRD analysis. The control over the size and optical properties of nanocrystals was achieved via variation in calcination temperatures. The obtained average sizes from XRD spectra and transmission electron microscopy TEM images showed exponential variation with increasing calcination temperature. The optical properties showed a decrease in the band gap energy with increasing calcination temperature due to the enlargement of the nanoparticle size. These results prove that direct calcination of reactant solution is a convenient thermal treatment route for the potential large-scale production of size-controlled Titania nanoparticles. View Full-Text

Keywords: titanium dioxide TiO2 nanoparticles; thermal treatment; X-ray diffraction XRD; transmission electron microscopy TEM titanium dioxide TiO2 nanoparticles; thermal treatment; X-ray diffraction XRD; transmission electron microscopy TEM





Autor: Aysar Sabah Keiteb 1,2,* , Elias Saion 1, Azmi Zakaria 1, Nayereh Soltani 3,4,* and Nura Abdullahi 1

Fuente: http://mdpi.com/



DESCARGAR PDF




Documentos relacionados