Novel Anion Exchange Method for Synthesis of Zinc Oxide Nanocrystal Powder and Photocatalytic Activity of the Powder
There are major problems associated with the preparation nanometer-sized doped metal oxides using the current solution chemistry method, such as difficulties in removing chlorine, in accurate doping, and in the repeatability of doping. A novel solution method of doping, non-aqueous ion exchange for removal of chlorine was applied to prepare nano-ZnO doped with Sb, which is based on a reaction that occurs in low-polar solvents containing limited water under a neutral condition. The removal of chlorine ion and the hydrolysis are conducted at the same time. The new process ensures that an accurate and uniform doping is achieved, a great deal of solvent is saved and all the hydrolysis products are recovered by distillation. XRD patterns suggest that the doped nano-ZnO, without any firing, is a crystal with distinct X-ray diffraction peaks. UV-Vis absorption spectra shift towards the violet region and UV-Vis absorption strengths increase, implying antimony atom has doped into the lattice of ZnO crystal. The photo-catalytic degradation of methyl red (MR) over the solid semi-conductor showed the doping had greatly increased the degradation efficiency of Sb-doped ZnO crystal. The maximum degradation efficiency on MR reached up to 97 ％ in 90 min and increase about 70 ％ than that of pure zinc oxide.
nanometer-sized zinc oxide antimony doping anion-exchange resin hydrolysis photocatalysis
刘鹏 郭志辉 张学俊 肖天存
贵州省发酵工程与生物制药重点实验室,贵州大学,贵阳550003 无机化学实验室,牛津大学,牛津
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）