【摘要】 以CuCl2.2H2O和NaOH为原料,离子液体1-丁基-3-甲基咪唑四氟硼酸盐[BMIM]BF4-水混合溶剂为介质,利用化学还原法在112℃反应12 h合成了Cu2O粒子,考察了[BMIM]BF4对产物的影响。用XRD、ESEM/EDS和TEM/SAED对Cu2O粒子进行了结构和形貌表征;用FTIR和TG/DSC证实了离子液体修饰在Cu2O粒子的表面,从而有效地阻止了Cu2O粒子的氧化和团聚;用紫外-可见吸收光谱估测了Cu2O粒子的带隙能量为2.38 eV。离子液体在反应中发挥了还原剂、稳定剂、分散剂和模板剂的多重作用。更多还原

【Abstract】 Cu2O particles were synthesized at constant temperature of 112 ℃ for 12 h using CuCl2·2H2O and NaOH as raw materials in the mixed solvent of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate BF4-H2O via chemical reduction.XRD,ESEM/EDS and TEM/SAED were used to characterize the structure and morphology of the product.FTIR spectra and TG/DSC curves indicated that the surface of Cu2O particles was modified with the ionic liquid to prevent them from oxidation and crystallite aggregation.UV-vis spectra were employed to estimate the band gap energy of Cu2O to be about 2.38 eV.It was demonstrated that the ionic liquid acted as reducing,stabilizing,dispersing as well as structure-directing agent.更多还原