纳米结构CuO/Ti薄膜催化剂的制备及其催化对硝基苯酚还原研究  

Preparation of Nanostructured CuO/Ti Film and Its Catalytic Activity in Reduction of p-Nitrophenol with Hydrazine Hydrate

作　　者：李浩[1] 邹秀婷[1] 廖锦云[1] 王海涛[1] 张喜斌[1] 

机构地区：[1]惠州学院化学工程系,广东惠州516007

出　　处：《惠州学院学报》2016年第3期1-4,共4页Journal of Huizhou University

基　　金：国家自然科学基金(51001052);广东省自然科学基金(2016A030313120);广东省高校高层次人才培养项目(184);广东省高校优秀青年培育项目(YQ2015154)

摘　　要：采用水热法制备出了负载于钛片基材上的氧化铜薄膜,使用扫描电子显微镜(SEM)、X射线衍射仪(XRD)对样品进行了表征。SEM照片显示氧化铜薄膜由许多厚度约为10 nm的氧化铜纳米片所组成,XRD谱图显示氧化铜为面心立方结构。以水合肼还原对硝基苯酚为模型反应考察了所制备的薄膜催化剂的催化性能,研究发现催化过程中氢氧化钠用量对水合肼还原对硝基苯酚的速率有显著影响。在氢氧化钠用量为0.8-1.6克的范围内,对硝基苯酚还原速率随着氢氧化钠用量的增加显著增加,进一步增加其用量则导致对硝基苯酚还原速率的下降。表明动力学计算,Cu O/Ti催化水合肼还原对硝基苯酚反应的表观活化能仅为28.0 k J/mol,证实了所制备的薄膜催化剂具有很高的催化活性。CuO film supported on Ti substrate （CuO/Ti） was prepared by a hydrothermal approach, which was then characterized by scanning electron microscope （SEM） and x-ray diflYactionmeter. SEM images indicated that the CuO film was composed of CuO nanosheets with thickness of 10 nm and XRD pattern demonstrated that the CuO was face-centered cubic phase. The reduction of p-ni- trophenol （PNP） with hydrazine hydrate was applied as a model reaction to investigate the activity of CuO/Ti fihn. It was found that the dosage of NaOH played a key role in determining the rate of PNP reduction. Increase of NaOH dosage in the range of 0.8-1.6g would re- sult in an increase of PNP reduction rate. However, a further increase of NaOH dosage to 2.0g would retard the PNP reduction. By cal- culation, the apparent activation energy of PNP reduction catalyzed by our CuO/Ti was as low as 28.0kJ/mo1, implying that the as-pre- pared CuO/Ti possessed high catalytic activity towards PNP reduction with hydrazine hydrate.

关 键 词：氧化铜 薄膜 催化剂 对硝基苯酚 

分 类 号：O643.32[理学—物理化学]