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Iron polymeric hydroxygroups pillared clays (Fe-PILC) were prepared by Na^+-montmorillonite with iron pillaring agent. 2.01Au/Fe-PILC catalyst was obtained by deposited-precipitation (DP) method. 2.52Au/Fe-oxide catalyst was prepared by co-precipitation method. The catalytic activity of these catalysts was measured by catalytic combustion of formaldehyde. The catalyst of 2.01Au/Fe-PILC exhibits the high catalytic activity. The catalytic combustion reaction of formaldehyde proceeds at considerable rates at 20 ℃ and complete burn-off of formaldehyde is achieved at 120 ℃. The structure of catalysts, the valence state of gold and the size of gold particles were investigated by means of X-ray powder diffractometry, X-ray photoelectron spectroscopy and transmission electron microscopy. The results show that gold atoms with partially positive charge exist in the catalyst and play an important role in the catalytic activity. In addition, nano-sized, well-dispersed gold particles and good adsorption properties of support are necessary to obtain high activity Au catalysts for catalytic combustion of formaldehyde. 相似文献
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文章以花脑特矿区水土保持方案编制为依据,根据工程建设情况,按照功能划分水土流失分区,并根据分区特点提出相应的防治措施。 相似文献
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文章通过对公路项目的基本情况进行分析,从水土保持角度进行公路项目的水土保持措施设计,达到防治项目新增水土流失的目的。 相似文献
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化学工艺学是化学工程与工艺专业本科教育中一门重要的专业课程,为绿色化工教育提供了适宜的平台。本文介绍了在化学工艺学教学中进行绿色化工教育的一些尝试,如重视案例教学,基础与前沿知识相结合,培养当代工程观的教育理念,以期为更好地开展绿色化工教育提供借鉴。 相似文献