CAJ | 학술논문

以钨酸钠为钨源,氯化钠为诱导剂,通过水热法制备了三氧化钨(WO3)纳米棒,再以葡萄糖为碳源,经再次水热反应对 WO3 表面进行碳包覆,然后在氢气和甲烷混合气氛中反应一段时间获得了具有火柴棒状结构的纳米碳管.采用 X 射线衍射分析、场发射扫描电子显微镜、透射电子显微镜和 X 射线能量散射谱等手段对样品的晶型、形貌、微结构和表面化学元素进行了表征与分析.结果表明,样品由纳米碳管和碳化钨(WC)构成.其中,纳米碳管为火柴棒状,长度 0.5~1.0 μm,直径 100 nm 左右;WC 颗粒位于纳米碳管内部,其大小决定了火柴棒状纳米碳管的内径.这充分说明 WC 在碳管的生长过程中充当催化剂的作用.
이오산납위오원,록화납위유도제,통과수열법제비료삼양화오(WO3)납미봉,재이포도당위탄원,경재차수열반응대 WO3 표면진행탄포복,연후재경기화갑완혼합기분중반응일단시간획득료구유화시봉상결구적납미탄관.채용 X 사선연사분석、장발사소묘전자현미경、투사전자현미경화 X 사선능량산사보등수단대양품적정형、형모、미결구화표면화학원소진행료표정여분석.결과표명,양품유납미탄관화탄화오(WC)구성.기중,납미탄관위화시봉상,장도 0.5~1.0 μm,직경 100 nm 좌우;WC 과립위우납미탄관내부,기대소결정료화시봉상납미탄관적내경.저충분설명 WC 재탄관적생장과정중충당최화제적작용.
Tungsten trioxide nanorod was prepared by a hydrothermal method using sodium tungstate as tungsten source and sodium chloride as an inducer. The nanorod was coated with carbon by a hydrothermal reaction once again and using glucose as a carbon source. Match-like carbon nanotube was fabricated by reaction under a mixed gas of H2 and CH4 with a volume ratio of H2 to CH4 of 1:4. The crystal phase, morphology, microstructure and chemical elements of the samples were characterized and analyzed by X-ray diffraction, scanning electron microscope, transmission electron microscope and X-ray energy dispersion spectrum. The results showed that the sample was consisted of carbon nanotube and tungsten carbide (WC). The morphology of the carbon nanotube was of match-like with a length between 0.5 μm and 1.0 μm, and a diameter around 100 nm. WC particles laid in the inner space of the carbon nanotube and the inner diameter of the nanotube was depended on the diameter of WC particle. These implied that WC particle took a catalytic role during the growth of the carbon nanotube.