关于环己烷作为溶剂的问题? 2.1. Synthesis of -NaYF4:Yb,Tm Nanocrystals. All chemicals were of analytical grade and used without further purification. The synthesis of monodisperse -NaYF4:Yb(25%), Tm (0.3%) nanocrystals has been reported in detail.16 In a typical procedure for the synthesis of -NaYF4:Yb/Tm, 0.75 mmol of YCl3, 0.25 mmol of YbCl3, and 0.003 mmol of TmCl3 were added to a 100 mL flask and dissolved in 2mL of DI water to form a clear solution after vigorous stirring. After 6 mL of oleic acid and 15 mL of 1-octadecene were added, the solution was heated to 100 °C for 10 min and then to 156 °C for 30 min and then cooled to room temperature. A solution of 4 mmol of NH4F (0.1482 g) and 2.5 mmol of NaOH (0.1 g) in 10 mL of methanol was added, and then the solution was kept at 50 °C for 30 min. After methanol was evaporated, the solution was heated to 300 °C under an argon atmosphere for 1.5 h and then cooled to room temperature. The nanocrystals were precipitated with 10mLof acetone, collected after centrifugation, and redispersed in 6 mL of cyclohexane. 2.2. Synthesisof-NaYF4:Yb,Tm@-NaYF4:Yb,ErNanocrystals. YCl3 (0.80 mmol), YbCl3 (0.2 mmol), and ErCl3 (0.02 mmol) were added to a 100 mL flask and dissolved in 2 mL of DI water to form a clear solution after vigorous stirring. Oleic acid (6 mL) and 1-octadecene (15 mL) were subsequently added, and the solution was heated to 100 °C for 10 min and then to 156 °C for 30 min to form a clear yellow solution and then cooled to 80 °C. A solution of 1 mmol of NaYF4:Yb,Tm nanocrystals in 6 mL of cyclohexane was added to the solution. After the removal of cyclohexane, a solution of 4 mmol of NH4F (0.1482 g) and 2.5 mmol of NaOH (0.1 g) in 10 mL of methanol was added, and then the solution was kept at 50 °C for 30 min. After the methanol was evaporated, the solution was heated to 300 °C under argon for 1.5 h and cooled to room temperature. The nanocrystals were collected after centrifugation and then redispersed in 6 mL of cyclohexane. 2.3. Synthesis of -NaYF4:Yb,Tm@-NaYF4:Yb,Er@-NaYF4: Yb,Tm Nanocrystals. YCl3 (0.75 mmol), YbCl3 (0.25 mmol), and TmCl3 (0.003 mmol) were added to a 100 mL flask and dissolved in 2 mL of DI water to form a clear solution after vigorous stirring. After 6 mL of oleic acid and 15 mL of 1-octadecene were added, the solution was heated to 100 °C for 10 min and then to 156 °C for 30 min and then cooled to room temperature. A solution of -NaYF4:Yb,Tm@-NaYF4:Yb,Er nanocrystals in 6 mL of cyclohexane was added to the solution. A solution of 4 mmol of NH4F (0.1482 g) and 2.5 mmol of NaOH (0.1 g) in 10 mL of methanol was added, and then the solution was kept at 50 °C for 30 min. After the methanol was evaporated, the solution was heated to 300 °C under an argon atmosphere for 1.5 h and then cooled to room temperature. The nanocrystals were precipitated with 10 mL of acetone, collected after centrifugation, and redispersed in 6 mL of cyclohexane. 其中实验部分采用 环己 烷作为制备的纳米材料分散试剂,在后续的反应中如何除去环己烷? PS:本人是研一学生,刚进实验室,由于是环境科学专业,化学基础不太好,求高手解答查看更多1个回答 . 3人已关注