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首页> 外文期刊>RSC Advances >An ultrasonic method for the synthesis, control and optimization of CdS/TiO2 core–shell nanocomposites
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An ultrasonic method for the synthesis, control and optimization of CdS/TiO2 core–shell nanocomposites

机译：超声法合成，控制和优化CdS / TiO2核壳纳米复合材料

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In this study, an ultrasonic method was utilized in combination with microemulsion to synthesize CdS/TiO _(2) core–shell nanoparticles and control their particle size and ultimately optimize the influential parameters. Moreover, response surface methodology (RSM) was used to optimize the thickness of the shell. Herein, four parameters, i.e. temperature (67–79 °C), synthesis retention time (45–105 min), TiO _(2) ?:?CdS ratio (1.5–7.5) and the power of ultrasound waves (37–53 watt), were optimized to synthesize nanoparticles with an average size of up to 10 nm. A correlation equation was introduced for the size range of 10–90 nm, which was then proven to have excellent predictions. To verify the proposed model, two different sets of combinations were selected to synthesize 10 nm composites, and consequently, nanocomposites with the sizes of 10.4 and 10.9 nm were successfully synthesized. The power of ultrasound waves and retention time had the most influence on the size of the particles. Further experiments proved that the optical absorption spectrum of the composite particles was extended to the visible region. Furthermore, the formation of CdS/TiO _(2) core–shell nanocomposites was confirmed by different characterization techniques including XRD, TEM, EDAX, UV-vis, FTIR and DLS.
机译：在这项研究中，超声方法与微乳液结合使用来合成CdS / TiO _（2）核壳纳米粒子，并控制其粒径并最终优化影响参数。此外，使用响应表面方法（RSM）来优化壳的厚度。这里，有四个参数，即温度（67–79°C），合成保留时间（45–105分钟），TiO _（2）α：ΔCdS比（1.5–7.5）和超声波功率（37–53）经优化可合成平均粒径最高达10 nm的纳米颗粒。引入了一个相关方程，用于10-90 nm的尺寸范围，然后被证明具有出色的预测。为了验证提出的模型，选择了两组不同的组合来合成10 nm复合材料，因此，成功合成了尺寸为10.4和10.9 nm的纳米复合材料。超声波的功率和保留时间对颗粒的大小影响最大。进一步的实验证明，复合颗粒的光吸收光谱扩展到可见光区域。此外，通过不同的表征技术，包括XRD，TEM，EDAX，UV-vis，FTIR和DLS，证实了CdS / TiO _（2）核-壳纳米复合材料的形成。

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