کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1272596 | 1497484 | 2014 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A new CdS/Bi1−xInxTaO4 heterostructured photocatalyst containing solid solutions for H2 evolution from water splitting A new CdS/Bi1−xInxTaO4 heterostructured photocatalyst containing solid solutions for H2 evolution from water splitting](/preview/png/1272596.png)
• Catalysts were facilely prepared by using cheap and environment-friendly Ta2O5.
• A new strategy was proposed to improve photocatalytic activity of tantalate-based catalysts.
• 30CBITO exhibits good photocatalytic activity and long-term durability for H2 production.
• Photocatalytic enhancement mechanism of the catalyst was proposed.
A new strategy has been put forward to improve the performance of photocatalytic H2 evolution of tantalate-based catalysts through designing solid solutions Bi1−xInxTaO4 combined with CdS, among which the solid solutions Bi1−xInxTaO4 (x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0) were firstly synthesized by the citrate method using cheap and environment-friendly Ta2O5. The experimental results reveal that the Bi0.5In0.5TaO4 solid solution shows the best photocatalytic performance among the Bi1−xInxTaO4 solid solutions. And in the absence of noble metals, the 30% CdS/Bi0.5In0.5TaO4 (30CBITO) catalyst exhibits good photocatalytic hydrogen evolution from water splitting with a rate of H2 production of 511.75 μmol h−1 g−1 under simulated sunlight irradiation. And the rate of hydrogen evolution does not markedly change for 60 h. Their compositions, structures and morphologies were characterized by UV–vis diffusion reflectance spectroscopy (DRS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). A photocatalytic enhancement mechanism was put forward to elucidate the superior photocatalytic activity and long-term stability of the heterostructured CdS/Bi0.5In0.5TaO4 composites.
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Journal: International Journal of Hydrogen Energy - Volume 39, Issue 25, 22 August 2014, Pages 13105–13113