Rapid surfactant-free synthesis of Mg(OH)2 nanoplates and pseudomorphic dehydration to MgO
Rapid surfactant-free synthesis of Mg(OH)2 nanoplates and pseudomorphic dehydration to MgO
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DOI：
10.1039/c5ce00595g
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发表时间：
2015-01-01
期刊：
影响因子：
3.1
通讯作者：
Gregory, Duncan H.
中科院分区：
文献类型：
--
作者：
Hanlon, James M.;Diaz, Laura Bravo;Gregory, Duncan H.
在多模腔(MMC)微波反应器中，通过水热合成，可以在极小的时间尺度上制备出厚度约为50 nm的氢氧化镁纳米片。这种方法可以在不到3分钟的时间内合成约1g的单相氢氧化镁(2)，而不需要表面活性剂或非水溶剂。通过TG-DTA-MS、PXD和SEM测试表明，氢氧化物纳米材料在低于同等块体材料的>；200K的温度下脱水，可以作为假象合成氧化镁纳米板材的前驱体。同样，用微波照射氢氧化镁纳米材料6分钟，得到单相氧化镁，即可进行赝态合成。
Magnesium hydroxide nanoplates ca. 50 nm in thickness can be prepared over minute timescales via hydrothermal synthesis in a multimode cavity (MMC) microwave reactor. This approach allows ca. 1 g of single-phase Mg(OH)(2) to be synthesised in less than 3 minutes without the requirement of surfactants or non-aqueous solvents. The hydroxide nanomaterial dehydrates at temperatures >200 K below that of the equivalent bulk material and can be utilised as a precursor for the pseudomorphic synthesis of nanoplates of MgO as investigated by TG-DTA-MS, PXD and SEM measurements. Equally, the pseudomorphic synthesis can be performed by irradiating the Mg(OH)(2) nanomaterial with microwaves for 6 minutes to produce single-phase MgO.