共查询到13条相似文献,搜索用时 125 毫秒
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几年前,声化学(Sonochemistry)这一术语很多人还是陌生的。由于超声在化学合成,金属有机化学,化学结构的解释,聚合物科学等领域中有了大量成果,引起了人们对声化学这门新学科的重视。 事实上,声化学已有相当长的历史,50年代就有研究论文发表。那时大多是研究声波对水的分解作用。在沉寂了20年之后,声化学复兴了,出于探索新技术与新材料的动机,得到了更加广泛深入的研究。 从根本上讲,化学乃是能量与物质的一种互作用。传统的能量形式是热学的、光学的或是离子辐射的。声能则是另一种独特的形式。声波与化学分子并不直接发生互作用。超声在… 相似文献
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Phong le V Hung TQ Son VT Kim S Jeong JH Kim C Jeong JR 《Journal of nanoscience and nanotechnology》2011,11(3):2726-2729
In this study, we successfully synthesized monodisperse magnetite nanoparticles (NPs) (Fe3O4) by sonochemical method using mono (ethylene glycol) (MEG) as a modifier of the reaction environment and found that MEG could be a good candidate to prevent oxidation and toxicity in sonochemical synthesis. The microstructure and size distribution of the Fe3O4 NPs were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) respectively. It revealed that the NPs prepared by MEG assisted sonochemical method show a smaller average size and better monodispersity compared to conventional sonochemical method. Due the the reduced average size and uniform size distribution nature of the NPs, it also showed good superparamagnetic properties with very low coercivity less than 0.5 Oe. 相似文献
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Comparison of Fenton and sono-Fenton bisphenol A degradation 总被引:3,自引:0,他引:3
Degradation of bisphenol A (BPA) was carried out with the Fenton reagent with and without additional sonochemical treatment. The Fenton and the sono-Fenton decomposition of BPA showed that ultrasound irradiation of wastewater improved the wet oxidation process of 25 mg l(-1) BPA solutions. The sonochemical degradation of BPA was monitored using UV absorption and large volume injection packed capillary LC measurements. 相似文献
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A simple sonochemical approach for the preparation of PbS nanoparticles homogeneously coated on sub-micrometer silica spheres
has been described. The transmission electron microscopy and scanning electron microscopy images show that the PbS nanoparticles
with size of 30 nm were coated on the silica spheres, without any free nanoparticles. X-ray diffraction reveals that the PbS
nanoparticles are of cubic rock-salt structure. Moreover, by dissolving the silica cores with a diluted hydrofluoric acid
solution, stable PbS hollow structures were obtained. It is considered that the sonochemical process in which triethanolamine
acted as complex agent played an important role for the homogenouse coating of PbS nanoparticles on silica spheres. 相似文献