{"title":"Gallium, aluminium and mixed gallium-aluminium pillared montmorillonite","authors":"Antonio Vieira Coelho, Georges Poncelet *","doi":"10.1016/0166-9834(91)80073-6","DOIUrl":null,"url":null,"abstract":"<div><p>Pillaring of montmorillonite was achieved with partially hydrolysed solutions of gallium, gallium-aluminium and aluminium. The development of 18Åspcacings was investigated in relation with the OH/M<sup>3+</sup> molar ratio, the amount of pillaring solution and the molar composition of the mixed solutions. With respect to Al-pillared clays, Ga- and Ga-Al-pulared montmorillonites exhibit similar behaviour toward heat treatment. They also have similar specific surface areas and pore volumes. IR spectroscopy of adsorbed pyridine show that both Bronsted and Lewis acidities are present, the former being slightly less developed in the Ga-pillared sample than in the aluminium analogue.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 2","pages":"Pages 303-314"},"PeriodicalIF":0.0000,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80073-6","citationCount":"38","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0166983491800736","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 38
Abstract
Pillaring of montmorillonite was achieved with partially hydrolysed solutions of gallium, gallium-aluminium and aluminium. The development of 18Åspcacings was investigated in relation with the OH/M3+ molar ratio, the amount of pillaring solution and the molar composition of the mixed solutions. With respect to Al-pillared clays, Ga- and Ga-Al-pulared montmorillonites exhibit similar behaviour toward heat treatment. They also have similar specific surface areas and pore volumes. IR spectroscopy of adsorbed pyridine show that both Bronsted and Lewis acidities are present, the former being slightly less developed in the Ga-pillared sample than in the aluminium analogue.
用部分水解的镓、镓铝和铝溶液实现蒙脱土的柱化。研究了18Åspcacings的发展与OH/M3+的摩尔比、柱化溶液的量和混合溶液的摩尔组成的关系。对于铝柱粘土，Ga-和Ga- al - puled蒙脱石表现出相似的热处理行为。它们也具有相似的比表面积和孔隙体积。吸附吡啶的红外光谱表明，同时存在Bronsted酸和Lewis酸，前者在ga柱样品中比在铝类似物中稍弱。
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