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介孔固体及介孔复合体 总被引:12,自引:0,他引:12
介绍了介孔固体和介孔复合体的基本概念及基制备方法,结构,性能特点,应用情况,简要综述了这一新学科的研究状况,并展望了它的发展前景。 相似文献
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Onion-structured transition metal dichalcogenide nanoparticles by laser fabrication in liquids and atmospheres 下载免费PDF全文
Since the discovery of transition metal dichalcogenide (TMDC) nanoparticles (NPs) with the onion-like structure, many efforts have been made to develop their fabrication methods. Laser fabrication (LF) is one of the most promising methods to prepare onion-structured TMDC (or OS-TMDC) NPs due to its green, flexible, and scalable syntheses. In this mini-review article, we systematically introduce various laser-induced OS-TMDC (especially the OS-MoS2) NPs, their formation mechanism, properties, and applications. The preparation routes mainly include laser ablation in liquids and atmospheres, and laser irradiation in liquids. The various formation mechanisms are then introduced based on the different preparation routes, to describe the formations of the corresponding OS-NPs. Finally, some interesting properties and novel applications of these NPs are briefly demonstrated, and a short outlook is also given. This review could help to understand the progress of the laser-induced OS-TMDC NPs and their applications. 相似文献
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通过化学浴沉积的方法制备了一种高SERS活性和重复性的银薄膜衬底。分别采用扫描电子显微镜和拉曼光谱研究了沉积时间对银薄膜微观形貌和SERS活性的影响, 优化的沉积时间为120分钟。利用优化的银薄膜衬底, 可以检测到10-9 M 的罗丹明分子的SERS谱图, 表明该银薄膜衬底具有很高的SERS活性。相同实验条件下, 在一片银薄膜衬底上任意选择16个点测试R6G的SERS谱图。分别计算了R6G的8个特征峰16次检测的相对标准偏差, 最大相对标准偏差小于13% 。实验结果表明, 该衬底具有很好的重复性, 可应用于SERS 的定量分析。采用优化的银薄膜衬底检测了不同浓度的芥子气及其水解产物硫二甘醇。分别结合芥子气和硫二甘醇的常规拉曼光谱和文献报道, 对它们的SERS谱图进行了指认和归属。20分钟内, 对芥子气和硫二甘醇的检测限可分别达到320 ppm和1 ppm (g/g)。 相似文献
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