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Preparation of TiO_2 regulation AAO template method and its application of nanomaterials

Author: LiuHui
Tutor: MaJie
School: Capital Normal University
Course: Physical and chemical
Keywords: AAO template adjustive synthesis TiO2 nano-materials catalysis composite deposit anticorrosion property
CLC: TB383.1
Type: Master's thesis
Year: 2007
Downloads: 267
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Abstract


To obtain TiO2 materials with aptotic dimension and different appearance.This paper combined the different weight of external active reagent become templates with different figure and the character of AAO template with even aperture, TiO2 nanotubes and nanowires were prepared by electrodeposition and sol-gel method respectively. The theory that TiO2 nanotubes and nanowires were prepared controllablely and the applications in biologic electrochemistry sensor and composite deposit with antimicrobial capability were investigated, obtain some valuable results. The main contents of research are as follows:① By electrodeposition and sol-gel method respectively it combined the different weight of external active reagent become templates with different figure and the character of AAO template with even aperture, TiO2 nanotubes and nanowires with aptotic dimension were prepared. The morphology, elements and crystalline structure of the TiO2 nanotubes and nanowires were investigated with TEM, EDX and XRD. And discussed the theory of TiO2 nanotubes and nanowires be prepared controllablely.② HRP with TiO2 nanoglobes, TiO2 nanotubes and TiO2 nanowires respectively be modified on GC electrode, the direct electrochemic behavior of HRP with these different TiO2 was examined. The theories of differently formal TiO2 have different catalysis for HRP were discussed.③ It prepared a series of Ni-P-Cr composite coatings containing TiO2 nanoglobes、 TiO2 nanotubes and TiO2 nanowires respectively from plating solution by electrodeposition. The surface morphology, elements of the prepared composite deposit were investigated with SEM and EDX. The anticorrosion property of the prepared composite deposit was studied by using polarization curve in artificial seawater （3.5%NaCl solution） and electrochemical impedance spectroscopy （EIS） in culture medium in the presence of sulphate reducing bacteria （SRB）. The theories of differently formal TiO2 affect the anticorrosion property of the prepared composite deposit were discussed.The results show: adjustive synthesis of TiO2 become nanotubes or nanowires by only changing the weight of CTAB. The prepared materials were spathic TiO2 nano-materials by TEM、 EDX and XRD investigated. It found that TiO2 nanotubes compared to TiO2 nanoglobes, TiO2 nanowires have better capability of catalysis and sterilization.because TiO2 nanotubes have better seeming proportion relative to TiO2 nanoglobes, TiO2 nanowires then have better active center.

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