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本實驗室博士最新nanoscale上發(fā)表的一篇文章,歡迎大家下載閱讀。。。。。 標(biāo)題:Facile preparation of magnetic γ-Fe2O3/TiO2 Janus hollow bowls with efficient visible-light photocatalytic activities by asymmetric shrinkage 來源:Nanoscale, 2012, 4 (15), 4650 - 4657該論文中,我們將并排電噴法和非平衡煅燒技術(shù)有機(jī)結(jié)合,通過構(gòu)筑一對具有不同凝膠化速率的前驅(qū)物對發(fā)展了一種新的非對稱收縮技術(shù),制備了磁性 γ-Fe2O3/TiO2 雙面神空心碗粒子。我們詳細(xì)了證實了雙面神空心碗納米結(jié)構(gòu)的形成機(jī)理,這為我們將該技術(shù)推廣制備雙組分或多組分空心碗結(jié)構(gòu)提供了可行的技術(shù)途徑。同時,我們還指出該碗狀空心結(jié)構(gòu)在可見光催化、藥物釋放和微納米發(fā)動機(jī)等方面有重要應(yīng)用前景。下面是該文的英文摘要。 In this paper, on a basis of the simple side-by-side co-electrospray procedure with a subsequent non-equilibrium calcination process, we have for the first time developed an asymmetric shrinkage approach to the fabrication of magnetic γ-Fe2O3/TiO2 Janus hollow bowls (JHBs) by constructing a precursor solution pair with different gelation rates during the solvents evaporation process. The formation mechanisms of the bowl-shapes as well as the hollow interiors are proposed and confirmed. The as-obtained γ-Fe2O3/TiO2 JHBs have a transition layer of Fe3+-doped-TiO2 between the γ-Fe2O3 and TiO2 phases, and show an efficient visible-light photocatalytic activity and convenient magnetic separation for water purification because of the unique structure and morphology as well as the fine magnetic properties. Moreover, the method reported here can be readily extended to the fabrication of other bi-, tri- and multi-component metal oxides hollow particles with asymmetric shapes. Due to the interesting bowl-shaped hollow nanostructure, the as-prepared γ-Fe2O3/TiO2 JHBs are expected to have a number of applications that involve drug delivery, micro-/nano-motors, microcontainer, microreactors, sensors, and so forth. [ Last edited by longjing88 on 2012-7-14 at 13:01 ] |
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