以葡萄糖为碳源,聚乙二醇-200（PEG-200）为分散剂和表面修饰剂,采用水热法制备了具有良好水溶性的荧光碳点（CDs）。以CDs为荧光探针,在p H 5.72的Britton-Robinson（B-R）缓冲溶液中,镍离子可使CDs的荧光显著猝灭,据此建立了一种测定...以葡萄糖为碳源,聚乙二醇-200（PEG-200）为分散剂和表面修饰剂,采用水热法制备了具有良好水溶性的荧光碳点（CDs）。以CDs为荧光探针,在p H 5.72的Britton-Robinson（B-R）缓冲溶液中,镍离子可使CDs的荧光显著猝灭,据此建立了一种测定镍离子的荧光光度新方法。结果表明,体系的最大激发波长为350 nm,最大发射波长为435 nm;在最佳实验条件下,镍离子浓度在3.0~80μmol/L范围内与CDs的相对荧光强度呈良好的线性关系,其线性回归方程为ΔF=1.009＋0.031 0 c（μmol/L）,相关系数（r）为0.998 3,检出限为0.13μmol/L。方法应用于环境水样中痕量镍的测定,测定结果与原子吸收光谱法相符。该方法的加标回收率为98.1%~103.5%,相对标准偏差（RSD）小于2%。展开更多
Nickel hydroxide, Ni（OH）2 is widely used in electrodes of nickel-based alkaline secondary batteries, Ultrathin hexagonal Ni（OH）2 nanosheets of space group P-3ml were hydrothermally prepared at 200℃ for 10h. Their...Nickel hydroxide, Ni（OH）2 is widely used in electrodes of nickel-based alkaline secondary batteries, Ultrathin hexagonal Ni（OH）2 nanosheets of space group P-3ml were hydrothermally prepared at 200℃ for 10h. Their diameter and thickness were 200-300 and 3-5 nm, respectively, Their formation was attributed to the oriented assembly of growing particles, which was assisted by surfactant molecules. The specific surface area of the Ni（OH）2 nanosheets was 8.66 m2/g. Their magnetization curve exhibited linear paramagnetic behavior across the entire measurement region.展开更多
基金financial support from the National Innovation Engineering Program for new Energy Vehicle Industry Technology, National Natural Science Foundation of China(No.81225010)863 High-Tech Project of China(2012AA022603)
文摘Nickel hydroxide, Ni（OH）2 is widely used in electrodes of nickel-based alkaline secondary batteries, Ultrathin hexagonal Ni（OH）2 nanosheets of space group P-3ml were hydrothermally prepared at 200℃ for 10h. Their diameter and thickness were 200-300 and 3-5 nm, respectively, Their formation was attributed to the oriented assembly of growing particles, which was assisted by surfactant molecules. The specific surface area of the Ni（OH）2 nanosheets was 8.66 m2/g. Their magnetization curve exhibited linear paramagnetic behavior across the entire measurement region.
