CuCrO<sub>2</sub>的合成及其复合催化剂的光催化性能

刘宗园; 王桂赟; 刘先平; 王延吉

CuCrO₂的合成及其复合催化剂的光催化性能

河北工业大学化工学院绿色化工与高效节能河北省重点实验室, 天津 300130

基金项目: 国家自然科学基金（21076058）；河北省重大技术创新项目（12275603Z）。

详细信息

通讯作者:
王桂赟，Tel：022-60202489，E-mail：wgy1964@hebut.edu.cn。

中图分类号: O643
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- 被引次数: 0
出版历程
- 收稿日期: 2013-06-06
- 修回日期: 2013-08-25
- 刊出日期: 2013-12-30

Preparation of CuCrO₂ and the photocatalytic properties of its composites

Hebei Provincial Key Laboratory of Green Chemical Technology & High Efficient Energy Saving, Hebei University of Technology, Tianjin 300130, China

摘要

摘要: 以硝酸铬和硝酸铜为原料，通过半湿法经两种不同路径合成了CuCrO₂半导体物质。分别采用热重-差示扫描（TG-DSC）、X射线衍射（XRD）、紫外-可见漫反射（UV-vis DR）、扫描电镜（SEM）及X射线光电子能谱（XPS）对样品进行了表征分析。确立了以氨水为Cr³⁺沉淀剂制得的氢氧化铬沉淀中加入硝酸铜溶液是合成CuCrO₂较适宜的路径。借助TG-DSC和XRD的分析结果确立前驱体在热处理的过程中，含Cr物相的变化历程为Cr（OH）₃ → CuCrO₄ → CuCr₂O₄ → CuCrO₂。通过机械研磨的方法合成了CuCrO₂-WO₃和CuCrO₂-ZnO复合型催化剂，对其进行了XRD、SEM和XPS表征分析，并测试了复合催化剂的光催化活性。结果表明，与单独使用CuCrO₂相比，无论是以高压汞灯，还是以氙灯为光源，CuCrO₂-WO₃和CuCrO₂-ZnO的光催化产氢活性都有显著提高。
- CuCrO₂ /
- 半湿法 /
- 复合催化剂 /
- 光催化 /
- 分解水
Abstract: Delafossite CuCrO₂ was prepared with Cr(NO₃)₃ and Cu(NO₃)₂ by the semi-wet method via two different routes. The samples were characterized with thermogravimetry-differential scanning calorimetry, X-ray diffraction, diffuse reflectance ultraviolet-visible spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy techniques. It was shown that addition of Cr(OH)₃ precipitated with aqueous ammonia solution into aqueous Cu(NO₃)₂ solution is a suitable route to synthesize CuCrO₂. In the calcination process, the precursor transformed into CuCrO₂ in the sequence: Cr(OH)₃ → CuCrO₄ → CuCr₂O₄ → CuCrO₂, as verified by the TG-DSC and XRD results. The composites of CuCrO₂-WO₃ and CuCrO₂-ZnO prepared by the grinding method show higher activity than CuCrO₂ in the photocatalytic splitting of water into hydrogen under the irradiation of a high-pressure mercury lamp or a xenon lamp.
- CuCrO₂ /
- semi-wet method /
- composite catalyst /
- photocatalysis /
- water splitting

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