Effect of Pt Concentration on the Grain Growth of TiO2sol-gel Films

Y.J Jia,Na An,Yi Chen,H.N Chen,L Zhao,J Cai,L You,A Xavior

doi:10.1051/matecconf/201710004027

Y.J Jia, Na An + Show 6 more

Open Access

https://doi.org/10.1051/matecconf/201710004027

Copy DOI

Abstract

Pt metallic has been supported on TiO2 surface using different methods, Here, Pt doped TiO2 (Pt-TiO2) sol gel thin film were successfully produced by reducing chloroplatinc acid (H2PtCl6). The structures of prepared composites were investigated using X-ray diffraction (XRD). The physical morphologies of the composites were examined using transmission electron microscope (TEM). The grain size of Pt-TiO2 thin film after annealing was also measured by atomic force microscope (AFM) images.

Highlights

Extensive research for titanium dioxide (TiO2) has been carried out in efforts to develop variety of application fields including capacitors for photovoltaic cells [1], sensors [2], antireflection films [3], white pigments [4], optical coatings [5], and high density dynamic random access memory devices [6]
We report characteristic properties of TiO2 and Pt composite including UV-visible spectra, transmission electron microscope (TEM) images, x-ray diffraction (XRD) patterns and atomic force microscope (AFM) images
The single broad intense absorption peak of Pt doped TiO2 (Pt-TiO2) between 300 – 350 nm can be attributed to the charge-transfer from the valence band to the conduction band

Summary

Introduction

Extensive research for titanium dioxide (TiO2) has been carried out in efforts to develop variety of application fields including capacitors for photovoltaic cells [1], sensors [2], antireflection films [3], white pigments [4], optical coatings [5], and high density dynamic random access memory devices [6]. TiO2 have three different crystal phases, such as anatase, rutile, and brookite [7]. Rutile is the most common natural form of TiO2. Brookite phase is crystallized in the orthorhombic system and exhibits no photocatalytic activity. Earlier studies have revealed that the photocatalytic activity of TiO2 can be improved significantly by doping with noble metals such as Pt, Au, Ag, etc [12, 13]. It is well known that platinization of TiO2 often shows a high photocatalytic activity. The doping of Pt on TiO2 surface has been widely reported to improve photocatalytic performance for the split of water and the degradation of different harmful compounds [15]. We report characteristic properties of TiO2 and Pt composite including UV-visible spectra, transmission electron microscope (TEM) images, x-ray diffraction (XRD) patterns and atomic force microscope (AFM) images

Experimental details

Results and discussion

Conclusions