Preparation and Characterization of Cubic WO3 Films

doi:10.3724/SP.J.1077.2010.01318

Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (12): 1318-1324.DOI: 10.3724/SP.J.1077.2010.01318

• Research Paper • Previous Articles Next Articles

Preparation and Characterization of Cubic WO₃ Films

LI Wen-Zhang¹, LI Jie¹, WANG Xuan^{1, 2}, XIAO Juan¹, CHEN Qi-Yuan¹

(1. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083, China; 2. Shenyang Aluminum & Magnesium Engineering & Research Institute, Shenyang 110001, China)

Received:2010-03-20 Revised:2010-05-16 Published:2010-12-20 Online:2010-11-24
Supported by:
863 Program (2007A06Z129); Key Science and Technology Project of Hunan Province (2008SK1001)

Abstract

Abstract: Cubic WO₃ films were prepared by the polymeric precursor method using ammonium metatungstate as precursor and polyethylene glycol as structure-directing agent. The obtained materials were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), energy disperse spectroscope (EDS) and high-resolution transmission electron microscope (HRTEM). The influence of calcination temperature, pH value and substrates on the structure and morphology of films was investigated. The results indicate that the surface morphology of the resulting film on FTO glass has particle of 60 nm in size as cubic WO₃ calcined at 450℃, and the films are smooth and glossy with an uniform thickness of 2.9 μm. The structures of all samples on FTO glass annealed at 450-550℃ or prepared at the different pH values are cubic WO₃. The particle size of the films decreases with the increase of the pH values. Monoclinic WO₃ is formed when the films are prepared on quartz glass and graphite substrate, indicating that the substrates have apparent influence on the crystal structure of WO₃ thin films.

Key words: cubic WO₃, nano-structured film, polymeric precursor method

CLC Number:

O614
TB383

LI Wen-Zhang, LI Jie, WANG Xuan, XIAO Juan, CHEN Qi-Yuan. Preparation and Characterization of Cubic WO₃ Films[J]. Journal of Inorganic Materials, 2010, 25(12): 1318-1324.

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Preparation and Characterization of Cubic WO₃ Films

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