CAJ | 학술논문

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.
보도료일충간단적유단질미량보제비대량양화미단정납미편적합성방법.실험중선유미분재불가임하조제적조건하,우180℃수열반응36 h제비료반응전구물Mg(OH)2,재유신제비적경양화미재400℃하배소4 h획득해양화미단정납미편.분말연사분석표명소제비양화미납미정위립방결구.소묘전경분석현시저사납미정위편상형모,기평균후도약위80 nm,관도위2～6μm.고분변투사전경조편현시,양화미납미편중유대량공상형모존재,동시전자연사화양현시,해양화미납미편구유단정특성.실온형광광보현시납미편재416 nm부근유일개강이관적람색형광봉,재559 nm부근유일개상대교약이관적록색형광봉.BET측시표명해납미편유교대적표면적(127.21 m2/g).산물표정화실험과정분석현시,편상납미정적형성시유전구물형모적모판작용소치,이기공상형모시유전구물실수소형성.
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.