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首页> 外文会议>China international conference on nanoscience and technology >Preparation and Stability of Strongly Luminescing CdSe/Cd(OH)2/SiO2 Nano-composite Particles in Aqueous Solution
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Preparation and Stability of Strongly Luminescing CdSe/Cd(OH)2/SiO2 Nano-composite Particles in Aqueous Solution

机译：水溶液中强发光CdSe / Cd（OH）2 / SiO2纳米复合粒子的制备及稳定性

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Cadmium hydrous oxide deposited cadmium selenide nanoparticles were prepared by the addition of cadmium sulfate solution to cadmium selenide nanoparticles in weak alkaline solution at room temperature. The photoluminescence measurement displayed that the luminescence intensity was greatly increased by the addition of cadmium ions due to the formation of cadmium hydrous oxide on the surface of the cadmium selenide nanoparticles. Then, CdSe/Cd(OH)2/SiO2 nano-composite particles were synthesized using 3-mercatopropyl trimethoxysilane (MPS) by St謆er method. After the formation of the wafer-structured CdSe/Cd(OH)2/SiO2 nano-composite particles, the emission ability was mostly stabilized. Additionally, the stabilization of the wafer-structured composite particles against dilution with water was checked. The results showed that the photoluminescence stability was promoted after the deposition of silica on the surface of the CdSe/Cd(OH)2 nanoparticles. Comparison of stability of CdSe/SiO2 with that of CdSe/Cd(OH)2/SiO2 showed that Cd(OH)2 coating could enhance the photoluminescence effectively.
机译：通过在室温下在弱碱性溶液中将硒化镉溶液添加到硒化镉纳米颗粒中，制备了水合氧化镉沉积的硒化镉纳米颗粒。光致发光测量表明，由于硒化镉纳米颗粒表面上形成了水合氧化镉，通过添加镉离子大大提高了发光强度。然后，使用3-巯基丙基三甲氧基硅烷（MPS）通过St謆er方法合成了CdSe / Cd（OH）2 / SiO2纳米复合颗粒。在形成晶片结构的CdSe / Cd（OH）2 / SiO2纳米复合颗粒后，发射能力基本稳定。另外，检查了晶片结构的复合颗粒相对于水稀释的稳定性。结果表明，在CdSe / Cd（OH）2纳米颗粒表面沉积二氧化硅后，光致发光稳定性得到了提高。 CdSe / SiO2的稳定性与CdSe / Cd（OH）2 / SiO2的稳定性比较表明，Cd（OH）2涂层可以有效地增强光致发光。

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