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Long and well-aligned ZnO nanowires were hydrothermally synthesized on FTO glass based on a ZnO seed layer which was prepared by spin-coating and annealing techniques.The effect of the growth solution refreshment on the morphology of ZnO nanowires was investigated and the possible mechanism was discussed.After refreshing the growth solution for 5 cycles,ZnO nanowires of ~ 120 nm in diameter and ~ 20 /μm in length were obtained.The prepared ZnO nanowires were used as photoelectrodes in dye-sensitized solar cells(DSSCs),showing excellent photovoltaic performance.With the increase of growth cycles of ZnO nanowires,the photocurrent of DSSCs increased obviously due to the increased dye loading on the surface of ZnO nanowires.The results indicated that the lone and well-aligned ZnO nanowires are promising for DSSCs application. 相似文献
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毛细芯(多孔介质)是环路热管的核心部件,金属粉末烧结是目前制备毛细芯的常用方法,研究烧结参数对毛细芯性能的影响有利于提高环路热管的性能。以镍粉为原料,利用烧结的方法制备了具有不同烧结参数的毛细芯,实验研究了烧结参数对毛细芯微观结构和性能参数的影响。实验表明,烧结参数对毛细芯的微观结构和性能参数具有明显的影响。随着烧结温度的升高和保温时间的延长,毛细芯的孔隙率、平均孔径和渗透率呈下降趋势;毛细芯的抽吸质量和抽吸速率与毛细芯的渗透率呈正相关;在750~800℃范围内改变烧结温度和在40~50 min范围内改变保温时间,毛细芯结构和性能参数变化明显。 相似文献
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利用改进的水热法调控制备垂直对准的氧化锌纳米线阵列 总被引:1,自引:1,他引:0
Well-aligned ZnO nanowires were hydrothermally synthesized based on a facile method for preparing the ZnO seed layer which was derived from the combination of a sol-gel process and the spin-coating technique. The effect of the contents of growth solution and the growth duration on the morphology of ZnO nanowires has been investigated.The results indicated that long and vertically aligned ZnO nanowires could be obtained by adjusting the contents of ammonia and polyethyleneimine(PEI) in the growth solution.Under the optimized condition,the length of ZnO nanowires increased fast and almost linearly with the growth duration.After 10 h incubation,ZnO nanowires more than 25μm in length were obtained.By combining the conventional photolithographic method with this hydrothermal approach,long and well-aligned ZnO nanowire arrays were selectively grown on the substrate.In addition,the bottom fusion at the foot of the nanowires has been obviously improved.The results demonstrated that the improved hydrothermal process is favorable to synthesize long and well-aligned ZnO nanowires,and possesses good process compatibility with the conventional photolithographic technique for preparing ZnO nanowire arrays. So it has great potential in applications such as display and field emission devices. 相似文献
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船舶废气中含有的大量硫氧化物对大气环境造成了严重的污染,已成为国际社会广泛关注的焦点。本文首先介绍了国际海事组织和欧美发达国家有关船舶燃油硫含量的相关规定,然后综述了近年来船舶硫氧化物排放控制技术的研究进展,对比研究了国际主流船舶废气脱硫设备厂商的产品特点。分析结果表明,湿法脱硫是目前最具应用前景的排放控制技术,并着重介绍了该技术的分类、原理及优缺点。最后指出,随着针对船舶废气中其它有害污染物的减排规定的陆续出台,以及船舶朝向绿色环保发展的总体趋势,研发经济、高效的船舶废气多污染物综合处理系统将成为未来技术发展的重要方向,其中湿法脱硫与其他技术的协同运用在实现船舶废气综合处理方面具有很大的应用潜力。 相似文献
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