CAJ | 학술논문

以三辛基膦(TOP)为单一配位溶剂,二水合乙酸镉和硫粉为前驱体,用高温热解的方法制备CdS纳米棒.通过x射线衍射(XRD)、透射电镜(TEM)、高分辨透射电镜(HRTEM)、紫外-可见(UV-Vis)分光光度计、荧光(PL)光谱、傅里叶变换红外(FTIR)光谱和核磁共振磷谱(~(31)P NMR)等方法对样品的结构、形貌和光学特性进行了表征.考察了前驱体Cd/S摩尔比和反应物浓度对硫化镉纳米结构的影响.实验结果表明,该法制备的CdS纳米棒为纤锌矿结构,直径为4.0 nm,长度为28.0 nm,沿[001]方向择优生长,具有量子限域效应.同时,对CdS纳米晶的形成机理进行了初步的探讨.
이삼신기련(TOP)위단일배위용제,이수합을산력화류분위전구체,용고온열해적방법제비CdS납미봉.통과x사선연사(XRD)、투사전경(TEM)、고분변투사전경(HRTEM)、자외-가견(UV-Vis)분광광도계、형광(PL)광보、부리협변환홍외(FTIR)광보화핵자공진린보(~(31)P NMR)등방법대양품적결구、형모화광학특성진행료표정.고찰료전구체Cd/S마이비화반응물농도대류화력납미결구적영향.실험결과표명,해법제비적CdS납미봉위섬자광결구,직경위4.0 nm,장도위28.0 nm,연[001]방향택우생장,구유양자한역효응.동시,대CdS납미정적형성궤리진행료초보적탐토.
CdS nanorods were successfully synthesized by pyrolysis using trioctylphosphine (TOP) as a coordinating solvent. For this pyrolysis, cadmium acetate dihydrate and sulfur powder were used as the cadmium source and sulfur source, respectively. The structure, morphology, and optical properties of the prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), ultraviolet-visible (UV-Vis) spectroscopy, photoluminescence (PL), Fourier transform infrared (FHR) spectroscopy, and nuclear magnetic resonance (NMR) ~(31)p spectroscopy. The effects of different molar ratios of Cd-to-S and the reaction concentrations on the morphology and size of the CdS nanostructures were investigated. The results indicated that the wurtzite CdS nanorods, with a typical diameter of 4.5 nm and a length of up to 28.0 nm, had a preferential [001]growth direction and displayed a quantum confinement effect. We also proposed a possible forma-tion mechanism for the CdS nanocrystals based on the experimental results.