Synthesis based structural and optical behavior of anatase TiO2 nanoparticles

被引：42

作者：

Tripathi, Anand Kumar ^{[1
,2
]}

Mathpal, Mohan Chandra ^{[1
,2
]}

Kumar, Promod ^{[3
]}

Singh, Manish Kumar ^{[4
]}

Mishra, Sheo Kumar ^{[5
]}

Srivastava, Rajneesh Kumar ^{[6
]}

Chung, Jin Suk ^{[7
]}

Verma, Govind ^{[8
]}

Ahmad, M. M. ^{[3
]}

Agarwal, Arvind ^{[1
]}

机构：

[1] Motilal Nehru Natl Inst Technol, Dept Phys, Allahabad 211004, Uttar Pradesh, India

[2] Devprayag Inst Tech Studies, Nano Res Ctr, Allahabad 211013, Uttar Pradesh, India

[3] Natl Inst Technol, Dept Phys, Srinagar 190006, Jammu & Kashmir, India

[4] LNM Inst Informat Technol, Dept Phys, Jaipur 302031, Rajasthan, India

[5] Saha Inst Nucl Phys, Surface Phys Div, Kolkata 700064, India

[6] Univ Allahabad, Dept Elect & Commun, Allahabad 211002, Uttar Pradesh, India

[7] Univ Ulsan, Sch Chem Engn, Ulsan 680749, South Korea

[8] Natl Phys Lab, Surface Phys & Nanostruct Grp, New Delhi 110012, India

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2014年 / 23卷

关键词：

Sol-gel; Co-precipitation; TiO2; Photoconductivity; Nanomaterials; PHOTOCATALYTIC ACTIVITY; RIETVELD ANALYSIS; BAND-GAP; RUTILE; PEAK; LUMINESCENCE; TRANSPORT; EMISSION; PHASES; GROWTH;

D O I：

10.1016/j.mssp.2014.02.041

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The effect of synthesis method on optical and photoconducting properties of titanium dioxide (TiO2) nanoparticles has been investigated. Sol-gel and co-precipitation methods have been employed to prepare pure anatase phased TiO2 nanoparticles calcinated at different temperatures below 500 degrees C. The optimized value of average crystallite size is within the range of 19-21 nm for a common calcination temperature of 400 degrees C for both the methods. The redshift in optical band gap of 0.9 eV has been observed for the sample synthesized by co-precipitation method with respect to the sol-gel method. The photoluminescence spectrum exhibits broad visible emission in both routes of synthesis while photoconductivity shows fast growth and decay of photocurrent in TiO2 prepared by co-precipitation method as compared to TiO2 prepared by the sol-gel method under visible illumination. Crystal structure based Rietveld refinement of X-ray diffraction data, scanning electron microscopy as well as photoluminescence and photoconductivity measurements were performed to characterize nanocrystalline anatase TiO2. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：136 / 143

页数：8