Synthesis And Photocatalytic Performance Of SnO₂Materials With Diverse Morphologies For Degradation Of Organic Pollutants

ABSTRACT:Three-dimensional ordered hole (3DOM) photonic crystal is a new material in recently years, because of its structural features such as large specific surface area, high porosity, band gap and the features of material itself(semiconductor material mostly),it is widely used in solar cells,catalyst, carrier and sensors. The research is on the basis of extensive literature. The research is on the basis of extensive literature. Changing the physical properties of SnO2, such as its morphology, the particle scale, etc. to obtain a high specific surface area and the quantum size effect, the catalytic performance can be improved to some extent. So inspired by the fact that we develop SnO2semiconductor material into three-dimensional ordered macroporous structure, you can take advantage of its high specific surface area, pore structure also can use it to increase the band gap SnO2photocatalytic properties of photonic crystals, and related work and report very little. we can get advantage of photonic crystals’high specific surface area, pore structure and band gap simultaneously to increase photocatalytic properties, and related work and report very little.In this experiment, we prepared SiO2pellets by the Stober that have a monodisperse preferably and its diameter is about280nm, PMMA pellets by sol synthesis method that the particle diameter was about220nm,270nm,290nm,350nm. The resulting SiO2pellets be prepared a good degree of order colloidal crystal template with vertical deposition method,and PMMA pellets be prepared a higher degree of order opal material by centrifugal method.we let SnCl2.2H2O preparat into the SnO2precursor sol, and then we let the precursor of SnO2sol to penetration into the opal template,through the heat treatment(Heating system is2℃/min to450℃) and HF acid to remove the opal template. At the end, we will get high quality three-dimensional ordered hole photonic crystal, that is the template method. For three-dimensional ordered macroporous materials obtained, XRD characterization tests, we found that the XRD diffraction peaks are sharp and it, sanatase, it have a good crystallinity, and has tended to complete the preparation of high purity SnO2of opal,and it’s purity is high. Crystallinity and crystallization were tested by TEM. And found that the crystal spacing is0.345nm, SEM test can observed it’s high order, but the order of inverse opal with SiO2is less and whose low intensity. IR analysis can found impurities in the sample of preparating process, the main impurities of the template was introduced in the process of preparating ball. At the end, we let final sample to act as a catalyst applied to the photodegradation of rganic dye methylene blue and methyl orange, we find that the inverse opal that the diameter of PMMA ball is350nm have a high photodegradation efficiency of organic dye methylene blue up about85%and the Photodegradation efficiency of methyl orange was about63%, We compare the inverse opal of different diameter of hole and find the template of bigger hole have a more higher photodegradation efficiency.