Photocatalytic hydrogen generation of Pt-Sr(Zr1-<italic>x</italic>Y<italic>x</italic>)O3-<italic>δ</italic>-TiO2 heterojunction under the irradiation of simulated sunlight

doi:10.1007/s11458-009-0026-7

Front Chem Chin

2009, Vol. 4

Issue (2) : 121-126 https://doi.org/10.1007/s11458-009-0026-7

RESEARCH ARTICLE

Photocatalytic hydrogen generation of Pt-Sr(Zr_1-_xY_x)O_3-_δ-TiO₂ heterojunction under the irradiation of simulated sunlight

Jianhui YAN^1,2(

), Qiang LIU^1,2, Luxiong GUAN¹, Feng LIANG², Haojie GU¹

1. Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, China; 2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

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Abstract

The Pt-Sr(Zr_1-_xY_x)O_3-_δ-TiO₂ (Pt-SZYT) heterojunction photocatalysts were prepared by a photodeposition method. The composite particles were characterized by XRD, SEM, UV-Vis DRS, and PL techniques. Photocatalytic hydrogen generation in H₂C₂O₄ aqueous solution under the irradiation of simulated sunlight was used as a probe reaction to evaluate the photocatalytic activity of the photocatalysts. The effects of the content of Pt loading and the concentration of oxalic acid on the photocatalytic activity of the catalyst were discussed. The continuous photocatalytic activity of the Pt-SZYT and the relationship between PL intensity and hydrogen generation were also discussed. The results show that Pt-SZYT catalysts had high photocatalytic activity of hydrogen generation. The content of Pt loading and the concentration of oxalic acid have important influence on the photocatalytic hydrogen generation. The optimal loading content of platinum was 0.90 mass%. Under this condition, the average rate of photocatalytic hydrogen generation was 1.68 mmol?h^-1 when the concentration of oxalic acid was 50 mmol?L^-1. The higher the photocatalytic activity, the weaker the PL intensity, which was demonstrated by the analysis of PL spectra.

Keywords heterojunction photocatalysis hydrogen generation Pt oxalic acid

Corresponding Author(s): YAN Jianhui,Email:yanjh58@163.com

Issue Date: 05 June 2009

Cite this article:

Jianhui YAN,Qiang LIU,Luxiong GUAN, et al. Photocatalytic hydrogen generation of Pt-Sr(Zr_1-_xY_x)O_3-_δ-TiO₂ heterojunction under the irradiation of simulated sunlight[J]. Front Chem Chin, 2009, 4(2): 121-126.

URL:

https://academic.hep.com.cn/fcc/EN/10.1007/s11458-009-0026-7
https://academic.hep.com.cn/fcc/EN/Y2009/V4/I2/121

Fig.1 SEM pattern of the as-obtained Pt-SZYT-70

Fig.2 XRD patterns of the as-obtained catalysts SZYT-70 and Pt-SZYT-70

Fig.3 Diffuse reflectance spectra of the as-obtained catalysts

Fig.4 PL spectra of different catalysts

Fig.5 Hydrogen generation at different react conditions

Tab.1 Effect of Pt amount on photocatalytic H generation of photocatalysts

Fig.6 The relationship between photocatalytic H generation and PL intensity of the as-obtained photocatalysts

Fig.7 Initial rate of photocatalytic H generation as a function of (oxalic acid) Solution 600 mL, (0. 90%Pt-SZYT-70)=0. 60 g , =30 min

Fig.8 Continuous photocatalytic hydrogen generation of photocatalyst under visible light irradiation Solution 600 mL, (0. 90%Pt-SZYT-70)=0. 60 g, (oxalic acid)=8.0 mmol?L

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