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The synthesis of ZnO architecture on a fluorine-doped SnO_2(FTO) conducting glass pre-coated with nanoporous TiO_2 film has been achieved by a one-step hydrothermal method at a temperature of 70℃.The effect of the reaction time on the morphology of the ZnO architecture has been investigated,and a possible growth mechanism for the formation of the ZnO architecture is discussed in detail.The morphology and phase structures of the as-obtained composite films have been investigated by field-emission scanning... 相似文献
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提出将纳米颗粒分散于导热油基液形成一种具有强的光吸收性能的纳米流体,能够直接在无吸收涂层的透明真空管内吸收太阳能进行光热转换,用于太阳能中温集热。首先探讨了导热油-Cu O纳米流体稳定性的影响因素,获得了制备过程中最佳的改性油酸量为2.3 m L/1g Cu O。在室外聚光工况下,实验测试了导热油-Cu O纳米流体在无涂层的透明真空管内直接吸收式中温集热特性,并与镀膜真空管集热性能进行了试验对比。结果显示,在150℃以下集热工况,纳米流体在该透明集热管的集热效率要高于传统吸收镀膜集热管,验证了该新型中温集热方法的可行性。 相似文献
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In this paper, we reported the fuel cell performance with La0.8Sr0.2MnO3 (LSM)/Ce0.8Sm0.2O1.9 (SDC) composite cathode prepared from LSM powders of different particle sizes via the silk-printing technique. It was found that the change in particle size of LSM nanoparticle from 40 to 90 nm resulted in an increase in the maximum power density from 132 to 228 mW/cm2 at 650 ℃ with H2 as fuel and O2 as oxidant. And the polarization resistance of the electrode decreased from 2.547 to 1.034 Ω·cm2. Concerning the particle size of electrode materials, a higher activity was anticipated with smaller particles because a large number of TPB or electrode surface sites along with a higher porosity could be developed. However, this study showed that the electrode prepared with particles of larger diameter had fine and uniform micro-structure resulting in higher power density and lower overpotential, where homogeneous distribution of particles and pores was beneficial for increasing the electrochemical active area and the electronic conductivity of the electrodes as well as the gas diffusion for the reactants. 相似文献
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综述了染料敏化太阳能电池的研究背景和发展过程,包括了光阳极、光敏染料和电解质的研究进展,详细阐述了该电池国内外各项关键技术的实验和产业化研究最新成果,着重分析了染料敏化太阳电池的未来发展趋势,并展望了该电池的应用前景。 相似文献
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