Synthesis And Properties Of Micro/Nano Semiconductor Materials

Inspired by many biological materials exhibiting fascinating superwettability,such as lotus leaves, rice leaves, peanut leaves, red rose petals, cicada wings, butterfly wings, et. al, researchers fabricated many superhydrophobic coatings using a variety of different ingredients in different fields. The extensive range of applications, from antifogging glass and anti-icing wire to water-resistant clothing. However, challenges still remain in developing large scale superhydrophobic surfaces in a technically simple, inexpensive and easy to handle way. The main work in this paper is focussed on the synthesis of Ba MF4(M=Mn, Zn, Co), CdS and TiO2 with the method of hydrothermal. By changing the synthesis temperatue, reaction time and surfactant, the crystallinity, morphology and superhydropholic properties of the products have been studied. Besides the ability of self-clean, the coatings can degrade complex pollutants assisted by the sunlight. They combined superhydrophobic and photocatalysis. The main contents of this paper are as follows:1 、 The definition, properties, synthesis and applications of nanomaterials; The development of BaMF4(M=Mn, Zn, Co), CdS and TiO2 were introduced.2、In this work, we report a facile one-step hydrothermal approach to synthesize Ba MnF4 superhydrophobic materials with different morphologies. The chemical structure, morphology and superhydrophobic have been studied by XRD, SEM, TEM,EDS and CA, respectively. The results show that pH values of the starting solution,temperatue, reaction time and surfactants affect the crystallinity, morphology and superhydropholic properties of the products.3、We report a facile one-step hydrothermal approach to synthesize BaZnF4 and Ba CoF4 superhydrophobic materials with different morphologies. The chemical structure, morphology and superhydrophobic have been studied by XRD, SEM, TEM,EDS and CA, respectively. The results show that pH values of the starting solution,temperatue, reaction time and surfacctants affects the crystallinity, morphology and superhydropholic properties of the products.4、We report the fabrication of CdS photocatalytic films on common glass without calcination using screen-printing technique for the fabrication of CdS photocatalytic films on common glass without calcination. The as-synthesised CdS films exhibit excellent photostability and enhanced photocatalytic activity for the degradation ofsome organnic pollutes, such as RhB, CB, MB and 2,4-NP. Above all, the CdS films display high stability and recyclability. Moreover, the as-prepared film showed both superhydrophobicity and superoleophilicity, and could effectively separate the mixture of water and oil.5、We fabricated non-fluorinated TiO2 hybrid films with photocatalytic activity and stable superhydrophobic using screen-printing technique. The as-prepared film on filter paper showed both superhydrophobicity and superoleophilicity, and could effectively separate the mixture of water and oil. Moreover, this method could be applied to other substrates, such as filterstuff, copper mesh and stainless steel mesh.