光照及需氧条件下Al2O3-AlBrx催化醇的选择性氧化反应
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TQ426.8;O622.4

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国家自然科学基金


Selective oxidation of alcohols catalyzed by Al2O3-AlBrx under aerobic and light conditions
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    摘要:

    以脱脂棉为模板制备了多孔管状结构的Al2O3材料,用不同浓度的氢溴酸对多孔管状结构的Al2O3材料进行化学剪裁,制备了活性量可控,比表面积可调,不同形貌的负载型催化剂Al2O3-AlBrx。采用电场发射扫描电镜(SEM)和X射线衍射仪(XRD)对催化剂进行了表征。结果表明,该催化剂较好的复制了棉纤维的宏观和微观结构,呈现出明显的生物形貌特征。在光照条件下以空气为氧化剂的醇的选择性氧化反应中,发现催化剂Al2O3-AlBrx-3可以高选择性地将醇氧化为相应的醛、酮或酸,并对反应机理进行了探讨。该催化剂循环使用三次仍保持较高的催化活性。

    Abstract:

    Al2O3 material with cribrate tubular structure was prepared by absorbent cotton as moldboard through immersion method and was clipped chemically by HBr acid solution of different concentration. The catalyst Al2O3-AlBrx with controlled activity, adjustable specific surface area and different feature was prepared successfully, and was characterized by scanning electronic microscope and X-ray diffraction. Results show that the catalyst good copy the macroscopic and microscopic structure of cotton fiber and shows the characteristics of obvious biological morphology. Under lighting condition, we found that Al2O3-AlBrx-3 is available for the oxidation of alcohol to corresponding aldehyde, ketone or acid with higher conversion and selectivity using air as an oxidant and proposed a plausible mechanism. Al2O3-AlBrx-3 was recyclable using three times still maintaining high catalytic activity.

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李文锋,王锋,景芝娇,马恒昌.光照及需氧条件下Al2O3-AlBrx催化醇的选择性氧化反应[J].精细化工,2014,31(2):

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  • 收稿日期:2013-07-29
  • 最后修改日期:2013-09-06
  • 录用日期:2013-09-16
  • 在线发布日期: 2014-01-03
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