以水熱法製備氮與鎢共摻雜鈦酸管合成及其可見光觸媒之應用

陳昶佑

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以水熱法製備氮與鎢共摻雜鈦酸管合成及其可見光觸媒之應用

Synthesis of Nitrogen and Tungsten Codoped Titanate Nanotube Prepared by Hydrothermal Process for Photocatalytic Applications in Visible-light Region

陳昶佑 , Masters　　Advisor：許子建　　

繁體中文

可見光催化；羅丹明B ；水熱法；氮鎢共摻雜鈦酸管； hydrothermal ； N,W-doped titanate nanotubes ； rhodamine B ； visible-light photocatalysis

Abstract │ Reference (67) │ Altmetrics

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The nitrogen- and tungsten-doped titanate nanotubes were prepared by the hydrothermal synthesis route, using the commercial P25 as TiO2 sources, urea and ammonium tungsten as the nitrogen and tungsten sources. The UV-Vis absorption and the band gap of the N,W-doped titanate nanotubes were conducted by UV/Vis spectrophotometry. It was proven that N,W-doped titanate nanotubes were successfully synthesized. Microstructual characterization of N,W-doped titanate nanotubes with different amount of tungsten doping were performed by powder X-ray diffraction (XRD), surface area and porosity analyzer (BET), X-ray photoelectron spectrometry (XPS), diffuse reflectance spectroscopy (DRS), and UV/Vis spectrophotometry. The photocatalytic activity of N,W-doped titanate nanotubes with different amount of tungsten doping were evaluated by decomposition of rhodamine B dye solution under visible light. It was found that the degradation of rhodamine B of the N,W-doped titanate nanotubes were higher than the undoped titanate nanotubes up to 30%. The function of nitrogen and tungsten doping was found to form the new mid-gap states and to narrow the band gap of the photocatalysts, thus decreasing the recombination of electrons and holes and meanwhile increasing the efficiency of photocatalytic activity.

Reference ( 67 ) 〈TOP〉

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