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Ag/TiO2納米管的制備及其光催化性能
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上海市重點(diǎn)學(xué)科建設(shè)項(xiàng)目基金(J51402)；上海工程技術(shù)大學(xué)?；?2008xy39


Preparation of Ag/TiO2 Nanotube and Its Photocatalytic Performance
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    摘要:

    對(duì)純鈦片進(jìn)行陽極氧化，得到長度約2 μm的TiO2納米管，在AgNO3溶液中TiO2納米管在紫外光照射下，成功的將Ag+離子還原為Ag單質(zhì)，并沉積在TiO2納米管表面；用XRD, SEM 和XPS對(duì)制備的樣品進(jìn)行表征，結(jié)果顯示：Ag微粒(10~120 nm)是以單質(zhì)的形式，不均勻的分布在TiO2納米管表面，并具有很好的化學(xué)穩(wěn)定性；Ag/TiO2納米管光電催化效率隨Ag量的增加而增加，但超過最佳值后降解效率就會(huì)下降；實(shí)驗(yàn)顯示Ag含量為1.15% 的Ag/TiO2納米管降解效率最高，紫外光照射3 h后，初始濃度為10×10-6mol/L的亞甲基藍(lán)溶液降解率達(dá)到100%，比未摻雜Ag的TiO2納米管降解效率提高了22.98%

    Abstract:

    Ag nanoparticles were deposited photocatalytically on the TiO2 nanotube surface prepared by anodizing in an electrolyte of AgNO3 and characterized by XRD, SEM and X-ray Photoelectron Spectroscopy (XPS). The results show that the Ag particles (from 10 ~120 nm in size) are deposited on the TiO2 nanotube surface un-uniformly as Ag0 and Ag particles, showing a good chemical stability. The photo-degradation rate of mathylene blue solution increases as the content of Ag loaded on nanotube surface increase. If the content is greater then the most optimally content, the photo-degradation rate will decrease. It is shown that the photo-degradation rate is the highest when the content of Ag is about 1.15%. The Ag loaded nanotubes have much higher photo-degradation rate of about 22.98% than un-loaded nanotubes. The degradation rate is about 100% after UV irradiation of mathylene blue solution of 10×10-6mol/L for 3 h

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萬 斌,陳鳴波,周細(xì)應(yīng),沈嘉年,李文戈. Ag/TiO2納米管的制備及其光催化性能[J].稀有金屬材料與工程,2009,38(11):2012~2016.[Wan Bin, Chen Mingbo, Zhou Xiying, Shen Jianian, Li Wenge. Preparation of Ag/TiO2 Nanotube and Its Photocatalytic Performance[J]. Rare Metal Materials and Engineering,2009,38(11):2012~2016.]
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  • 收稿日期:2009-03-28
  • 最后修改日期:2009-07-13
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