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首页> 外文期刊>Catalysis science & technology >Effective elimination of As(III) via simultaneous photocatalytic oxidation and adsorption by a bifunctional cake-like TiO2 derived from MIL-125(Ti)
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Effective elimination of As(III) via simultaneous photocatalytic oxidation and adsorption by a bifunctional cake-like TiO2 derived from MIL-125(Ti)

机译：通过同时有效消除(III)光催化氧化和吸附双官能做成二氧化钛来自

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摘要

A bifunctional cake-like TiO2 was successfully synthesized via calcination of MIL-125(Ti) at a suitable temperature by a one-step method and was applied for As(III) removal by simultaneous photocatalytic oxidation and adsorption. The as-synthesized samples were characterized by XRD, TGA/DSC, SEM, TEM, N-2 adsorption-desorption isotherms, PL spectra, photocurrent, FTIR and XPS. The effects of calcination temperature on the specific surface areas of the samples, transformation of the TiO2 crystal phase and properties of As(III) removal were investigated. The results showed that higher calcination temperature resulting in a lower specific surface area and more transformations of the TiO2 crystal phase from anatase to rutile. The TiO2 calcined at 380 degrees C (MIL-125.Ti)-380 degrees C) exhibited excellent properties for As(III) removal, including photocatalytic oxidation of As(III) and simultaneous adsorption of the generated As(V). In addition, MIL-125(Ti)- 380 degrees C could be reused at least four times without significant reduction in the photocatalytic oxidation and adsorption performances. The excellent photocatalytic oxidation and adsorption abilities of MIL125(Ti)- 380 degrees C can be attributed to the synergistic effects of strong photogenerated electron-hole separation and high specific surface area. The bifunctional cake-like TiO2 provides a wonderful strategy to remove As(III) completely from contaminated water using a single step.
机译：成功地做成双官能团的二氧化钛通过煅烧合成mil - 125 (Ti)一步方法和合适的温度申请(3)删除的同时光催化氧化和吸附。由XRD、as-synthesized样本特征TGA / DSC闪,TEM N-2 adsorption-desorption光电流等温线,PL光谱,红外光谱XPS。特定的表面区域的样本,二氧化钛晶体阶段的转换(3)删除被调查的性质。结果表明,较高的煅烧温度导致较低的比表面积面积和转换的二氧化钛晶体阶段从锐钛矿、金红石。在380摄氏度(mil - 125. - ti) -380摄氏度)表现出的优良性能(3)删除,包括光催化氧化(3)和同步的吸附生成(V)。度可以被再利用至少四次没有明显的降低光催化氧化和吸附表演。氧化和吸附能力的MIL125 (Ti) -可以归因于380摄氏度强劲的photogenerated协同效应电子空穴分离,具体高表面积。提供了一个精彩的策略删除(3)使用一个完全从被污染的水的一步。

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