Studies on Microwave Assisted Synthesis of Low Size Copper Nanoparticles

• Main Authors: HONG, ZHENG-YU, 洪崢育
• Other Authors: HO, KO-SHAN
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/gtue75

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 106 === In this study, copper nanoparticleswereprepared in a facile way of microwave assisted reduction of CuSO4•5H2Oin the presence of Triethylenetetramine(TETA)in ethylene glycol solvent.PVP (polyvinylpyrrolidone) behavesas a stabilizer to avoid the aggregation of copper nanoparticles. In addition,Low size copper particles are successfully synthesized with the microwave assisted method. The nano-copper particles were characterized by cryo-transmission electron microscope (cryo-TEM) field emission gun scanning electron microscope (FE-SEM), absorption peaks in UV-visible spectra (UV-Vis), Thermogravimetric Analysis(TGA) and multi-function X-ray diffractiometer (XRD), respectively. According to the X-ray diffraction, neat copper nanoparticle were successfully synthesized in this study via chemical reduction assisted with microwave process. In addition, TEM and SEM images of copper nanoparticles demonstrate narrow size dispersion of about 2-5 nm in diameter. The range of the absorption wavelengthof copper nanoparticles were between 200-280 nm according to UV-Vis spectroscopy. When the particle sizes were smaller, the UV spectra demonstrated a blue shift. The TEM images of copper particle confirm that particles have melting behavior at temperatures below regular Tm during TEM image construction. The EDS images reveal the copper nanoparticle arepretty pure and stable. The TGA thermogram of copper nanoparticles could withstand temperatures ashigh as 200 °C under ambient condition without oxidation Keyword：Copper, Nano, Polyvinylpyrrolidone, Microwave Assist, Stabilizer