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Title: Influence of acid precursors on physicochemical properties of nanosized titania synthesized by thermal-hydrolysis method

Abstract

The influence of nature and concentration of acid species on surface morphology and physicochemical properties of titania particles synthesized by direct thermal hydrolysis of titanium tetrachloride was investigated. The acids used were hydrochloric acid, nitric acid, sulfuric acid, and perchloric acid with a concentration of 3 M. Thermal hydrolysis of titanium tetrachloride in hydrochloric acid and perchloric acid with molar ratios of [H{sup +}]/[Ti{sup 4+}] = 0.5, 1.0, 1.5, and 2.0, respectively, was used to study the effect of acid concentration. The synthesized materials were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, dynamic light scattering, and thermogravimetric analysis. Characterization of the samples by X-ray diffraction studies revealed the influence of acid species on the phase transformation of titania. Samples prepared by hydrochloric acid, nitric acid, and perchloric acid formed rutile phase with rhombus primary particles, while sulfuric acid resulted in anatase phase with flake-shaped primary particles. Transmission electron microscopy and dynamic light scattering results confirmed the nanosized titania particles and the agglomeration of primary particles to form secondary particles in spherical shape. The particle size of titania prepared using perchloric acid was smaller than those prepared with other acid sources. A direct correlation between [H{sup +}]/[Ti{sup 4+}]more » ratio and particle size of titania was observed.« less

Authors:
;  [1];  [2]
  1. Institute of Materials Science and Engineering, Department of Chemical Engineering, National Central University, Chung-Li 320, Taiwan (China)
  2. Institute of Materials Science and Engineering, Department of Chemical Engineering, National Central University, Chung-Li 320, Taiwan (China), E-mail: ywchen@cc.ncu.edu.tw
Publication Date:
OSTI Identifier:
21068221
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 43; Journal Issue: 3; Other Information: DOI: 10.1016/j.materresbull.2007.04.003; PII: S0025-5408(07)00146-8; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HYDROCHLORIC ACID; HYDROGEN IONS 1 PLUS; HYDROLYSIS; LIGHT SCATTERING; NANOSTRUCTURES; NITRIC ACID; PARTICLE SIZE; PARTICLES; PERCHLORIC ACID; PHASE TRANSFORMATIONS; RUTILE; SCANNING ELECTRON MICROSCOPY; SULFURIC ACID; SURFACE PROPERTIES; THERMAL GRAVIMETRIC ANALYSIS; TITANIUM CHLORIDES; TITANIUM IONS; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Rajesh, B., Sasirekha, N.R., and Chen, Y.-W. Influence of acid precursors on physicochemical properties of nanosized titania synthesized by thermal-hydrolysis method. United States: N. p., 2008. Web. doi:10.1016/j.materresbull.2007.04.003.
Rajesh, B., Sasirekha, N.R., & Chen, Y.-W. Influence of acid precursors on physicochemical properties of nanosized titania synthesized by thermal-hydrolysis method. United States. doi:10.1016/j.materresbull.2007.04.003.
Rajesh, B., Sasirekha, N.R., and Chen, Y.-W. Tue . "Influence of acid precursors on physicochemical properties of nanosized titania synthesized by thermal-hydrolysis method". United States. doi:10.1016/j.materresbull.2007.04.003.
@article{osti_21068221,
title = {Influence of acid precursors on physicochemical properties of nanosized titania synthesized by thermal-hydrolysis method},
author = {Rajesh, B. and Sasirekha, N.R. and Chen, Y.-W.},
abstractNote = {The influence of nature and concentration of acid species on surface morphology and physicochemical properties of titania particles synthesized by direct thermal hydrolysis of titanium tetrachloride was investigated. The acids used were hydrochloric acid, nitric acid, sulfuric acid, and perchloric acid with a concentration of 3 M. Thermal hydrolysis of titanium tetrachloride in hydrochloric acid and perchloric acid with molar ratios of [H{sup +}]/[Ti{sup 4+}] = 0.5, 1.0, 1.5, and 2.0, respectively, was used to study the effect of acid concentration. The synthesized materials were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, dynamic light scattering, and thermogravimetric analysis. Characterization of the samples by X-ray diffraction studies revealed the influence of acid species on the phase transformation of titania. Samples prepared by hydrochloric acid, nitric acid, and perchloric acid formed rutile phase with rhombus primary particles, while sulfuric acid resulted in anatase phase with flake-shaped primary particles. Transmission electron microscopy and dynamic light scattering results confirmed the nanosized titania particles and the agglomeration of primary particles to form secondary particles in spherical shape. The particle size of titania prepared using perchloric acid was smaller than those prepared with other acid sources. A direct correlation between [H{sup +}]/[Ti{sup 4+}] ratio and particle size of titania was observed.},
doi = {10.1016/j.materresbull.2007.04.003},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 3,
volume = 43,
place = {United States},
year = {2008},
month = {3}
}