作者:Ahmed I. Osman, Jehad K. Abu-Dahrieh, et al 来源:Scientific Reports 发布时间:2018/8/3 12:48:37
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便捷绿色的合成途径:从铝箔废料中制备高活性的γ-氧化铝

论文标题:A Facile Green Synthetic Route for the Preparation of Highly Active γ-Al2O3 from Aluminum Foil Waste

期刊:Scientific Reports

作者:Ahmed I. Osman, Jehad K. Abu-Dahrieh, et al

发表时间: 2017/06/15

数字识别码:10.1038/s41598-017-03839-x

原文链接:https://www.nature.com/articles/s41598-017-03839-x?utm_source=Other_website&utm_medium=Website_links&utm_content=RenLi-Nature-Scientific_Reports-Chemistry-China&utm_campaign=SCIREP_USG_JRCN_RL_Aluminum_sciencenet_article_1st_Aug

在《科学报告》发表的题为“A Facile Green Synthetic Route for the Preparation of Highly Active γ-Al2O3 from Aluminum Foil Waste”的研究论文中,来自英国北爱尔兰贝尔法斯特皇后大学化学与化学工程学院的Ahmed I. Osman及同事展示了一种从铝箔废料中制备高活性γ-氧化铝纳米介孔材料的新颖绿色方法。

该文章中介绍的新型绿色制备方法可从铝箔废料中提取出AlCl3.6H2O,以此来制备纳米介孔材料 γ-Al2O3,并将其命名为ACFL550。与通过商业途径购买的AlCl3制备的γ-Al2O3(AC550)相比,通过上述方法制备的γ-Al2O3具有表面积更大,孔隙更大,酸性更强的特点。研究人员通过单晶X射线衍射(XRD)对制备过程第一阶段产生的AlCl3.6H2O 和Al(NO3)3.9H2O结晶进行了表征,其分别为三方晶系(R-3c) 和单斜晶系(P21/c)。进一步通过能量弥散X衍射(EDX)分析证实,ACFL550中的氯含量(Cl%)为AC550中氯含量的一半,表明ACFL550可以作为一种很有前景的催化剂用于酸催化反应。研究人员将天然以及改良的ACFL550和AC550分别用于酸催化反应:甲醇脱水生成二甲醚和甲烷的氧化反应。结果显示,ACFL550相比AC550具有更高的催化活性。这项研究工作开辟了一条新途径,可从铝箔废料中提取制备活性高、结构良好的纳米介孔氧化铝催化剂,并展示了其在酸催化反应中的应用。

摘要:A novel green preparation route to prepare nano-mesoporous γ-Al2O3from AlCl3.6H2O derived from aluminum foil waste and designated as ACFL550 is demonstrated, which showed higher surface area, larger pore volume, stronger acidity and higher surface area compared to γ-Al2O3 that is produced from the commercial AlCl3 precursor, AC550. The produced crystalline AlCl3.6H2O and Al(NO3)3.9H2O in the first stage of the preparation method were characterized by single-crystal XRD, giving two crystal structures, a trigonal (R-3c) and monoclinic (P21/c) structure, respectively. EDX analysis showed that ACFL550 had half the chlorine content (Cl%) relative to AC550, which makes ACFL550 a promising catalyst in acid-catalysed reactions. Pure and modified ACFL550 and AC550 were applied in acid-catalysed reactions, the dehydration of methanol to dimethyl ether and the total methane oxidation reactions, respectively. It was found that ACFL550 showed higher catalytic activity than AC550. This work opens doors for the preparation of highly active and well-structured nano-mesoporous alumina catalysts/supports from aluminum foil waste and demonstrates its application in acid-catalysed reactions.

阅读论文全文请访问:https://www.nature.com/articles/s41598-017-03839-x?utm_source=Other_website&utm_medium=Website_links&utm_content=RenLi-Nature-Scientific_Reports-Chemistry-China&utm_campaign=SCIREP_USG_JRCN_RL_Aluminum_sciencenet_article_1st_Aug

期刊介绍:Scientific Reports is an online, open access journal from the publishers of Nature. We publish scientifically valid primary research from all areas of the natural and clinical sciences.

The 2016 journal metrics for Scientific Reports are as follows:

•2-year impact factor: 4.259

•5-year impact factor: 4.847

•Immediacy index: 0.647

(来源:科学网)

 
 
 
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