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Controlled Synthesis And Property Study Of Nanostructured Materials Of Alkaline-Earth Metal Phenlphosphonates And Europium Tungstate

Posted on:2009-12-18Degree:MasterType:Thesis
Country:ChinaCandidate:L L GaoFull Text:PDF
GTID:2121360245454033Subject:Inorganic Chemistry
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The special function of nanomaterials has significant meaning not only in the development of science, but also in the application fields. It has provided an amplitude research field for new materials. It has been proved that the shape, size, and structure of nanomaterials affect their properties directly. So, the purpose of this article is, on the one hand, to explore novel methods to synthesize nanomaterials with controllable shapes and sizes, and on the other hand, to disclose the rule of nanomaterials microstructure, size change and shape evolution, in order to make further lab research and applications. .We successfully synthesized nanostructures of alkaline-earth metal phenylphosphonate and europium tungstate. We have realized the control of size and shape of nanomaterials during the synthesis process, and established new route to synthesize some materials.By means of soft template which is CTAB and SDS method, we first synthesized different morphology nano-scale alkaline-earth metal phenylphosphonate have been successfully synthesized and characterized under hydrothermal condition. Low temperature hydrothermal methods have been regarded as an effective route to fabrication of high-quality anisotropic nanomaterials. Heating the nanorods of Ca(HO3PC6H5)2 at 700℃in the air for 2h yielded bluish violet nanoporous crystalline Ca2P2O7 without altering the 1D morphology. Brunauer-Emmett-Teller surface area was used to characterize these materials which could be applied as sorbents in further study.Using the solvothermal-assised microemulsion system (CTAB or SDS/cyclohexayl/1-pentanoI/water), we have successfully synthesized nanostructures of europium tungstate. The influence of reaction parameters on nanostructure has been discussed The possible growth mechanisms of these nanocrystals were elucidated in detail. The Eu2(WO4)3 samples with different morphologies exhibited the weak morphology-dependent luminescence properties and showed fascinating and valuable optical properties.
Keywords/Search Tags:nanostructures, synthesis, controllable
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