Phase transformation characteristics of combustion-synthesized TiO 2 nanoparticles

Shang Min Choi; Gyo Woo Lee

doi:10.3795/KSME-B.2008.32.3.224

Phase transformation characteristics of combustion-synthesized TiO ₂ nanoparticles

Shang Min Choi
, Gyo Woo Lee

Mechanical Design Engineering

Research output: Contribution to journal › Journal article › peer-review

1 Scopus citations

Abstract

In this article, TiO₂ nanoparticles were synthesized by using O₂-enriched coflow, hydrogen, diffusion flames. We investigated the thermal stability of the flame-synthesized TiO₂ nanoparticles by examining the crystalline structures of the nanoparticles. Also, the results were compared with those of commercial P-25 nanoparticles. TiO₂ nanoparticles, which were spherical with diameters approximately ranging from 30 to 60nm, were synthesized. From the XRD analyses, about 96wt% of the synthesized nanoparticles were anatase-phase. After the heat-treatment at 800°C for 30 minutes, the synthesized TiO₂ nanoparticles showed no significant changes of their shapes and crystalline phases. On the other hand, most of the commercial particles sintered with each other and changed to the rutile-phase. Based on the result of XRD analysis it is believed that the flame-synthesized TiO₂ nanoparticles have higher thermal stability at 800°C than the commercial particles.

Original language	English
Pages (from-to)	224-230
Number of pages	7
Journal	Transactions of the Korean Society of Mechanical Engineers, B
Volume	32
Issue number	3
DOIs	https://doi.org/10.3795/KSME-B.2008.32.3.224
State	Published - 2008.03

Keywords

Combustion synthesis
Crystalline structure
Heat treatment
Phase transformation

Access to Document

10.3795/KSME-B.2008.32.3.224

Cite this

@article{63328a677b4840bfb4b8b263b3191629,

title = "Phase transformation characteristics of combustion-synthesized TiO 2 nanoparticles",

abstract = "In this article, TiO2 nanoparticles were synthesized by using O2-enriched coflow, hydrogen, diffusion flames. We investigated the thermal stability of the flame-synthesized TiO2 nanoparticles by examining the crystalline structures of the nanoparticles. Also, the results were compared with those of commercial P-25 nanoparticles. TiO2 nanoparticles, which were spherical with diameters approximately ranging from 30 to 60nm, were synthesized. From the XRD analyses, about 96wt\% of the synthesized nanoparticles were anatase-phase. After the heat-treatment at 800°C for 30 minutes, the synthesized TiO2 nanoparticles showed no significant changes of their shapes and crystalline phases. On the other hand, most of the commercial particles sintered with each other and changed to the rutile-phase. Based on the result of XRD analysis it is believed that the flame-synthesized TiO2 nanoparticles have higher thermal stability at 800°C than the commercial particles.",

keywords = "Combustion synthesis, Crystalline structure, Heat treatment, Phase transformation",

author = "Choi, \{Shang Min\} and Lee, \{Gyo Woo\}",

year = "2008",

month = mar,

doi = "10.3795/KSME-B.2008.32.3.224",

language = "English",

volume = "32",

pages = "224--230",

journal = "Transactions of the Korean Society of Mechanical Engineers, B",

issn = "1226-4881",

number = "3",

}

TY - JOUR

T1 - Phase transformation characteristics of combustion-synthesized TiO 2 nanoparticles

AU - Choi, Shang Min

AU - Lee, Gyo Woo

PY - 2008/3

Y1 - 2008/3

N2 - In this article, TiO2 nanoparticles were synthesized by using O2-enriched coflow, hydrogen, diffusion flames. We investigated the thermal stability of the flame-synthesized TiO2 nanoparticles by examining the crystalline structures of the nanoparticles. Also, the results were compared with those of commercial P-25 nanoparticles. TiO2 nanoparticles, which were spherical with diameters approximately ranging from 30 to 60nm, were synthesized. From the XRD analyses, about 96wt% of the synthesized nanoparticles were anatase-phase. After the heat-treatment at 800°C for 30 minutes, the synthesized TiO2 nanoparticles showed no significant changes of their shapes and crystalline phases. On the other hand, most of the commercial particles sintered with each other and changed to the rutile-phase. Based on the result of XRD analysis it is believed that the flame-synthesized TiO2 nanoparticles have higher thermal stability at 800°C than the commercial particles.

AB - In this article, TiO2 nanoparticles were synthesized by using O2-enriched coflow, hydrogen, diffusion flames. We investigated the thermal stability of the flame-synthesized TiO2 nanoparticles by examining the crystalline structures of the nanoparticles. Also, the results were compared with those of commercial P-25 nanoparticles. TiO2 nanoparticles, which were spherical with diameters approximately ranging from 30 to 60nm, were synthesized. From the XRD analyses, about 96wt% of the synthesized nanoparticles were anatase-phase. After the heat-treatment at 800°C for 30 minutes, the synthesized TiO2 nanoparticles showed no significant changes of their shapes and crystalline phases. On the other hand, most of the commercial particles sintered with each other and changed to the rutile-phase. Based on the result of XRD analysis it is believed that the flame-synthesized TiO2 nanoparticles have higher thermal stability at 800°C than the commercial particles.

KW - Combustion synthesis

KW - Crystalline structure

KW - Heat treatment

KW - Phase transformation

UR - https://www.scopus.com/pages/publications/41149129299

U2 - 10.3795/KSME-B.2008.32.3.224

DO - 10.3795/KSME-B.2008.32.3.224

M3 - Journal article

AN - SCOPUS:41149129299

SN - 1226-4881

VL - 32

SP - 224

EP - 230

JO - Transactions of the Korean Society of Mechanical Engineers, B

JF - Transactions of the Korean Society of Mechanical Engineers, B

IS - 3

ER -

Phase transformation characteristics of combustion-synthesized TiO ₂ nanoparticles

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this