Temperature-dependent phase transformation of TiO2 nanoparticles synthesized by sol-gel method

被引：90

作者：

Dubey, R. S. ^{[1
]}

机构：

[1] Swarnandhra Coll Engn & Technol, Dept Nanotechnol, Adv Res Lab Nanomat & Devices, Narsapur, AP, India

来源：

MATERIALS LETTERS | 2018年 / 215卷

关键词：

TiO2; nanoparticles; X-ray diffraction; Crystallites; Polycrystalline; Anatase phase; NANOCRYSTALLINE TIO2; ANATASE; RUTILE;

D O I：

10.1016/j.matlet.2017.12.120

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline TiO2 particles were prepared to study the calcination temperature dependent phase transformation. X-ray diffraction (XRD) patterns showed the strong Bragg peaks correspond to anatase (101) and rutile (110) phases with their crystallite size 12 and 49 nm for the samples T1 and T2 calcined at 450 and 700 degrees C respectively. Raman spectroscopy investigation showed the phase transformation with the dominating rutile peaks from the pure-anatase phase. By UV-vis absorption spectroscopy, the strong ultraviolet-light absorption below 400 nm was observed. Using Kubelka-Munk function, the estimated band gap values were found to be 3.38 and 3.03 eV. The transmission scanning microscopy (TEM) images exhibited the slightly agglomerated nanoparticles while the selected area diffraction (SAED) patterns endorsed the polycrystalline nature. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：312 / 317

页数：6

共 23 条

[1] Characterization of cerium oxide nanoparticles-Part 1: Size measurements [J].

Baalousha, Mohammed ;

Ju-Nam, Yon ;

Cole, Paula A. ;

Gaiser, Birgit ;

Fernandes, Teresa F. ;

Hriljac, Joseph A. ;

Jepson, Mark A. ;

Stone, Vicki ;

Tyler, Charles R. ;

Lead, Jamie R. .

ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 2012, 31 (05) :983-993

[2] Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies [J].

Bach, U ;

Lupo, D ;

Comte, P ;

Moser, JE ;

Weissörtel, F ;

Salbeck, J ;

Spreitzer, H ;

Grätzel, M .

NATURE, 1998, 395 (6702) :583-585

[3] Determination of nanocrystal sizes:: A comparison of TEM, SAXS, and XRD studies of highly monodisperse COPt3 particles [J].

Borchert, H ;

Shevehenko, EV ;

Robert, A ;

Mekis, I ;

Kornowski, A ;

Grübel, G ;

Weller, H .

LANGMUIR, 2005, 21 (05) :1931-1936

[4]

Choudhury B, 2013, INT NANO LETT, V3, DOI 10.1186/2228-5326-3-25

[5] Study on the Anatase to Rutile Phase Transformation and Controlled Synthesis of Rutile Nanocrystals with the Assistance of Ionic Liquid [J].

Ding, Kunlun ;

Miao, Zhenjiang ;

Hu, Baoji ;

An, Guimin ;

Sun, Zhenyu ;

Han, Buxing ;

Liu, Zhimin .

LANGMUIR, 2010, 26 (12) :10294-10302

[6] TiO2 photocatalysis and related surface phenomena [J].

Fujishima, Akira ;

Zhang, Xintong ;

Tryk, Donald A. .

SURFACE SCIENCE REPORTS, 2008, 63 (12) :515-582

[7]

Ganesan S., 2011, ADV NAT SCI-NANOSCI, V2

[8] Dye-sensitized solar cells [J].

Grätzel, M .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2003, 4 (02) :145-153

[9] A review on the synthesis of TiO2 nanoparticles by solution route [J].

Gupta, Shipra Mital ;

Tripathi, Manoj .

CENTRAL EUROPEAN JOURNAL OF CHEMISTRY, 2012, 10 (02) :279-294

[10] Fine size-regulation of nanocrystalline anatase-TiO2 via sol-gel synthesis and subsequent phase transformation by calcination [J].

Hwang, Kyung-Jun ;

Lee, Jae-Wook ;

Yoo, Seung-Joon ;

Jeong, Sinyoung ;

Jeong, Dae Hong ;

Shim, Wang-Geun ;

Cho, Dae Won .

NEW JOURNAL OF CHEMISTRY, 2013, 37 (05) :1378-1384

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