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首页> 外文学位 >Synthesis, photostability and photocatalytic properties of water-suspended cadmium selenide and cadmium selenide/cadmium sulfide quantum dots.
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Synthesis, photostability and photocatalytic properties of water-suspended cadmium selenide and cadmium selenide/cadmium sulfide quantum dots.

机译：水悬浮硒化镉和硒化镉/硫化镉量子点的合成，光稳定性和光催化性能。

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Photocatalysis offers exciting opportunities in the development of a renewable energy source and environmentally-friendly chemical processes. Previous studies focused on titanium dioxide and non-oxide semiconductor nanoparticles (quantum dots), such as CdS, ZnS, MoS2 for photocatalytic breakdown of organic molecules. Catalytic performance has been limited by materials issues, e.g. low quantum yields and photocorrosion. CdSe quantum dots are a model semiconductor nanoparticle material with great potential in luminescence application, but they have not been studied for photocatalysis. In this study, the synthesis of the water-suspended CdSe and CdSe/CdS quantum dots was thoroughly studied. The CdSe and CdSe/CdS core/shell quantum dots were found to photocatalyze the degradation of 4-nitrophenol in water upon the UV-vis irradiation. Quantum efficiencies were low. The pH of the suspending fluid was found to be important in controlling colloidal stability, chemical stability, and reaction during irradiation.
机译：光催化为可再生能源和环保化学工艺的开发提供了令人兴奋的机会。先前的研究集中在二氧化钛和非氧化物半导体纳米颗粒（量子点）上，例如CdS，ZnS，MoS2用于光催化分解有机分子。催化性能受到材料问题的限制，例如低量子产率和光腐蚀。 CdSe量子点是一种在发光应用中具有巨大潜力的模型半导体纳米粒子材料，但尚未对其进行光催化研究。在这项研究中，彻底研究了水悬浮的CdSe和CdSe / CdS量子点的合成。发现CdSe和CdSe / CdS核/壳量子点在UV-vis照射下可光催化水中4-硝基苯酚的降解。量子效率低。发现悬浮液的pH对控制胶体稳定性，化学稳定性和辐照期间的反应很重要。

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