کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1489619 | 992309 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation of MgO nano-rods with strong catalytic activity via hydrated basic magnesium carbonates Preparation of MgO nano-rods with strong catalytic activity via hydrated basic magnesium carbonates](/preview/png/1489619.png)
MgO nano-rods of several microns in length and 50–100 nm in width were prepared by calcining nesquehonite phase, obtained by simple precipitation using (NH4)2CO3 under ambient condition. The MgO nano-rod with reasonably high surface area (75–120 m2 g−1) exhibits strong activity in solvent-free base catalyzed Claisen-Schmidt condensation giving 99% conversion in 2 h and is easily recyclable with no significant change in catalytic activity. Presence of numerous basic sites of different strengths (surface hydroxyl groups, low coordinate O2− sites) is attributed to the observed effect.
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► Simple solution route for preparing nesquehonite rods.
► Nano-building block based MgO rods as base catalyst.
► Calcination of nesquehonite in nitrogen gives highly active MgO catalyst.
► Large surface area and active site density is attributed to the strong activity.
Journal: Materials Research Bulletin - Volume 46, Issue 11, November 2011, Pages 2163–2167