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Simple Synthesis of Single-crystalline Nanoplates of Magnesium Oxide
Hai-xia Niu,Fei Yu,Kai-bin Tang,Wei Zhou
Author NameAffiliation
Hai-xia Niu Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technologyof China, Hefei 230026, China;Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Fei Yu Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China 
Kai-bin Tang Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technologyof China, Hefei 230026, China;Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Wei Zhou Department of Chemistry, University of Science and Technology of China, Hefei 230026, China 
Abstract:
Single-crystalline nanoplates of magnesium oxide were successfully synthesized through a calcinations route from the newly produced Mg(OH)2 precursors, which were directly prepared from the commercial bulk magnesium powders under a hydrothermal process in the absence of any additions. Scanning electron microscope (SEM) analysis indicated that the nanoplates were 2-6 μm in average width and about 80 nm in thickness.Transmission electron microscopy (TEM) images revealed that there was large quantity of nanopores with diameters ranging from 5 to 40 nm distributed in these nanoplates. The room-temperature photoluminescence (PL) spectrum of the nanoplates illustrated a strong blue emission band at 416 nm and a weak green emission band at 559 nm. Brunauer-Emmett-Teller (BET) analysis exhibited a feature of high surface of 127.21 m2/g for the products. The fabrication mechanism of the product was also discussed.
Key words:  MgO, Nanoplate, Hydrothermal process
FundProject:
氧化镁单晶纳米片的简单合成
牛海霞    ,俞斐  ,唐凯斌  ,周伟
摘要:
报道了一种简单的由单质镁两步制备大量氧化镁单晶纳米片的合成方法.实验中先由镁粉在不加任何助剂的条件下,于180℃水热反应36 h制备了反应前驱物Mg(OH)2,再由新制备的氢氧化镁在400℃下焙烧4 h获得该氧化镁单晶纳米片.粉末衍射分析表明所制备氧化镁纳米晶为立方结构.扫描电镜分析显示这些纳米晶为片状形貌,其平均厚度约为80 nm,宽度为2~6μm.高分辨透射电镜照片显示,氧化镁纳米片中有大量孔状形貌存在,同时电子衍射花样显示,该氧化镁纳米片具有单晶特性.室温荧光光谱显示纳米片在416 nm附近有一个强而宽的蓝色荧光峰,在559 nm附近有一个相对较弱而宽的绿色荧光峰.BET测试表明该纳米片有较大的表面积(127.21 m2/g).产物表征和实验过程分析显示,片状纳米晶的形成是由前驱物形貌的模板作用所致,而其孔状形貌是由前驱物失水所形成.
关键词:  氧化镁  纳米片  水热法
DOI:10.1360/cjcp2006.19(5).438.5
分类号: