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chemistrylover新虫 (小有名气)
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[交流]
【求助】合成水溶性氧化锌量子点的问题
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| 我重复J. Am. Chem. Soc. 2007, 129, 16029-16033制备水溶性量子点过程中，当所有原料混合起来搅拌的时候就有絮状的白色物质出现，是什么原因？合成量子需要注意哪些问题。谢谢！ |
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chemistrylover
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合成过程如下： To prepare sample S1, 26.3 mg of DEA were dissolved into 50 mL of distilled water to obtain a 5.0 mM DEA solution, and 37.2 mg of zinc nitrate hexahydrate were dissolved into 50 mL of distilled water to form a 2.5 mM zinc nitrate solution; the above two solutions and 0.35 mmol of OA were added into a reactor together. After the mixture stirred at room temperature for 30 min and the temperature was increased to 80 °C with continuous stirring for another 2.0 h, stable ZnO nanoparticles are formed in the solution. The as-prepared dispersion was filtered, and then the dispersion was centrifuged and as-obtained product was redispersed subsequently with 1-butanol, 1-propanol, and ethanol to remove any unreacted molecules. Finally, the QDs were obtained by centrifugation and then dispersed in water for further characterization. |
2楼2009-04-02 16:09:22
firebolt
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3楼2010-01-26 21:32:12
firebolt
铁杆木虫 (著名写手)
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4楼2010-01-27 08:42:07
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