Photocatalytic performance of Pr/In/Nd composite oxides synthesized by solid state reaction

详细信息    查看全文

• 作者：Huiquan Li ; Yumin Cui ; ^{cuiyumin0908@163.com} ; Wenshan Hong ; Suhua Fan ; Liangjun Zhu
• 关键词：Solid state reaction ; Composite oxides ; Photocatalysis ; Methyl orange
• 刊名：Ceramics International
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：39
• 期：6
• 页码：6583-6589
• 全文大小：646 K

文摘

Pr/In/Nd composite oxides with different Pr/In/Nd ratios were successfully prepared using a simple solid state reaction at 873 K. The composites were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area measurements, photoluminescence (PL) spectra and UV-vis diffuse reflection spectroscopy (UV-vis DRS). The photocatalytic activity of Pr/In/Nd composite oxides was investigated by the degradation of methyl orange (MO) in an aqueous solution under UV and visible light irradiation. It is found that compared with pure In₂O₃, the absorption intensity of the Pr/In/Nd composite oxide (Pr/In/Nd=1:8:1) increases in the 200-800 nm light region and the absorption edge has a shift to longer wavelength. In addition, the Pr/In/Nd composite oxide (Pr/In/Nd=1:8:1) shows higher UV and visible light photocatalytic activities than pure In₂O₃. The remarkably enhanced photocatalytic activities could be mainly attributed to the fact that proper introduction of Pr₂O₃ and Nd₂O₅ increased the BET surface area of In₂O₃, improved the separation efficiency of photogenerated electrons and holes, and enhanced the absorption intensity in 200-800 nm light region. The effect of various radical scavengers on the degradation of MO showed that OH, O₂^?, h⁺ and H₂O₂, especially O₂^?, jointly dominated the photodegradation process of MO under UV light irradiation.