陈霄榕,李永丹,康慧敏,张继炎,张鎏.SiO2与Keggin杂多酸相互作用的研究[J].分子催化,2002,(1):60-64
SiO2与Keggin杂多酸相互作用的研究
Investigation of Interaction between SiO2 and Keggin Heteropolyacids
  修订日期:2001-04-06
DOI:
中文关键词:  杂多酸 酸性 热稳定性 相互作用 二氧化硅 Keggin结构 负载型催化剂 表征
英文关键词:Heteropolyacids,Acidity,Thermal stability,Interaction
基金项目:
陈霄榕  李永丹  康慧敏  张继炎  张鎏
陈霄榕(天津大学,化学工程学院,碳一化工国家重点实验室,催化科学与工程系,天津,300072)
;李永丹(天津大学,化学工程学院,碳一化工国家重点实验室,催化科学与工程系,天津,300072)
;康慧敏(天津大学,化学工程学院,碳一化工国家重点实验室,催化科学与工程系,天津,300072)
;张继炎(天津大学,化学工程学院,碳一化工国家重点实验室,催化科学与工程系,天津,300072)
;张鎏(天津大学,化学工程学院,碳一化工国家重点实验室,催化科学与工程系,天津,300072)
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中文摘要:
      采用经典酸化与乙醚萃取相结合的方法,制备了Keggin型杂多酸H3PMo12O40,并以SiO2为载体制备了经不同温度焙烧的负载型杂多酸样品,利用TG、DTA、IR、XPS、NH3-TPD等手段,对负载前后的杂多酸样品进行了表征;考察了SiO2与杂多酸之间的相互作用以及载体对杂多酸酸性的影响,研究发现,SiO2载体的引入,可以有效改善杂多酸的热稳定性,焙烧温度的升高,会显著降低杂多酸的酸性,并提出SiO2杂多酸的相互作用方式。
英文摘要:
      A conventional acidification method incorporated with an ether extraction technique was used to prepare H\-3PMo\-\{12\}O\-\{40\} with Keggin structure. Silica supported heteropoly acids(HPA) were prepared at different calcination temperatures. The unsupported and supported HPA were characterized by TG, DTA, IR, XPS and NH\-3\|TPD techniques. The influence of SiO\-2 on HPA acidity and the interaction between SiO\-2 and HPA were investigated. It was found that the support SiO\-2 improves the thermal stability of HPA, and the increase of calcination temperature obviously lowers the HPA acidity. An interaction modle between SiO\-2 and HPA is proposed.
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