Abstract
The nano/microstructures with highly porous surface area have attracted tremendous attention, particularly the synthesis and tailoring of porous and hollow materials of high performance. In this paper, an easy method of cost-effective synthesis of hollow ceramic fiber membranes based on Hydroxyapatite, TiO2 and ZrO2 stabilized with Yttrium, is proposed by a single chemical route (polymeric precursor method) and a bio-template route (easy to degrade in thermal conditions). This article reports also the ZrTiO4 nanowires synthesis on a silicon (100) wafer in a single step deposition/thermal treatment. Template-directed membrane synthesis strategy was associated to the polymeric precursor route and spin-coating deposition technique. In this method, ZrTiO4 nanowire ceramic were synthesized by spin-coating thermal treatment technique using polycarbonate membrane as a template. According to the results, after heat-treatment by the template removal, the ZrTiO4 nanowire consists of uniformly deposited crystalline and porous nanoparticles that exhibited a higher surface area and a higher porosity. The polycrystalline nanowires were obtained at by thermal treatment with diameter in the range of 60-100 nm. Photoluminescence spectra were collected for fiber at room temperature. These characterizations demonstrate the morphology of structures formed, showing its hollow and porous conformation, suitable applications to advanced reinforced or device component material.
Highlights
The biotemplating is a new concept to fabricate ceramic materials with novel hierarchical and complex microstructures using natural materials as templates[1], posterior conversion of its tissue to ceramic materials has attracted considerable interest due to the possibility of development and optimization of tailoring porous of this materials, which have been made by modification of raw material, appropriated selection of many different species templates, chemical compositions and other physicalchemical conditions to lead to desired materials, retaining the micro-morphologies of their original counterparts
The diameter and length of the nanostructures obtained can be controlled by the pore size and thickness of the template membrane, but the elimination of the membrane is dependent of certain experimental conditions
The X-ray diffraction (XRD) patterns of this membranes (Figure 3C), show that the crystalline phase is more evident in the fibers that the material with grid format in similar thermal condition, this can be attributed to the nature of template precursor that drive material with arrange specific and porous, Yang and Ma have described a method to obtain macroporous network structure based on crystalline ZrO2 tube, from sol–gel mineralization membranes template and subsequent calcination[18], it suggest that several parameters can monitored and manipulated in order to control of final crystalline microstructure, thermogravimetry studies are in progress
Summary
The biotemplating is a new concept to fabricate ceramic materials with novel hierarchical and complex microstructures using natural materials as templates[1], posterior conversion of its tissue to ceramic materials has attracted considerable interest due to the possibility of development and optimization of tailoring porous of this materials, which have been made by modification of raw material, appropriated selection of many different species templates, chemical compositions and other physicalchemical conditions to lead to desired materials, retaining the micro-morphologies of their original counterparts. Macroporous materials are used in various forms and compositions in routinely day, including for instance polymeric foams for packaging, aluminum light-weight structures in buildings and airplanes, as well as porous ceramics for water purification. The. Membrane template-based synthesis of oxide nanostructures can be carried out by filling the porous surface of various polymeric or oxide membrane substrates with precursor solutions[4,5,6,7], such as cellulose acetate, polycarbonate (PC), PVDF, PTFE and anodized alumina oxide (AAO) nano membranes[8]. Oxide nanostructures have been grown applying chemical methods, the experimental conditions have strongly limited the compositions to monometallic oxides such as ZnO, SnO2, In2O3 or TiO212
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