Photocatalytic Reduction Properties of Palladium and Nitrogen Co-Doped TiO2 Thin Films

doi:10.11901/1005.3093.2016.381

Chinese Journal of Materials Research

2017, Vol. 31

Issue (4): 255-260 DOI: 10.11901/1005.3093.2016.381

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Photocatalytic Reduction Properties of Palladium and Nitrogen Co-Doped TiO₂ Thin Films

Haiyang CHEN, Fei HE, Xuhai ZHANG, Qiyue SHAO, Feng FANG(

)

School of Materials Science and Engineering,Southeast University,Nanjing 211189,China

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Haiyang CHEN, Fei HE, Xuhai ZHANG, Qiyue SHAO, Feng FANG. Photocatalytic Reduction Properties of Palladium and Nitrogen Co-Doped TiO₂ Thin Films. Chinese Journal of Materials Research, 2017, 31(4): 255-260.

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Abstract

Palladium and nitrogen co-doped TiO₂ films were prepared by DC magnetron sputtering and then characterized in terms of surface morphology, absorption spectra and photocatalytic reduction property under visible light etc.. The results show that the N-TiO₂ films are composed of anatase while they turn to be composed of rutile gradually due to the presence of Pd. After being co-doped with Pd, the films become loose with rougher surface. The introduction of Pd to N-TiO₂ thin films increases its effective absorption of visible light, as well as enhances its ability to capture electrons and separate photo-generated electron-hole pairs effectively. The photocatalytic reduction property of the films declines with the increasing Pd amount. Among others, the Pd-N-TiO₂ films with 0.4% (atomic fraction) Pd have the best photocatalytic reduction property.

Key words: inorganic non-metallic materials photocatalysis magnetron sputtering TiO₂

Received: 04 July 2016

ZTFLH:

TB43

Fund: Supported by National Natural Science Foundation of China (Nos.51371050 & 51302038), Six Talent Peaks Project in Jiangsu Province, China (No.2015-XCL-004)

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	Haiyang CHEN
	Fei HE
	Xuhai ZHANG
	Qiyue SHAO
	Feng FANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2016.381 OR https://www.cjmr.org/EN/Y2017/V31/I4/255

Table 1 Process condition of the Pd-N-TiO₂ films deposited with various amount of Pd

Fig.1 Surface SEM images of the Pd-N-TiO₂ films deposited with various amount of Pd (atomic fraction) (a) 0, (b) 0.4%, (c) 1.9%, (d) 7.3%

Fig.2 XRD patterns of Pd-N-TiO₂ sample and N-TiO₂ sample

Fig.3 XPS deconvoluted Pd 3d spectra of the Pd-N-TiO₂ films deposited with various amount of Pd (atomic fraction) (a) 0.4%,(b) 1.9%,(c) 7.3%

Fig.4 UV-vis absorption spectra of the Pd-N-TiO₂ films deposited with various amount of Pd (atomic fraction)

Fig.5 Cr (VI) residue percentage versus visible-light illumination time of the Pd-N-TiO₂ films deposited with various amount of Pd (atomic fraction)

Fig.6 XPS deconvoluted Ti2p spectra of the Pd-N-TiO₂ films deposited with various amount of Pd (atomic fraction) (a) 0.4%, (b) 1.9%, (c) 7.3%

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