亚甲蓝
纳米复合材料
光催化
锐钛矿
苯酚
可见光谱
对苯二酚
化学
水溶液
儿茶酚
催化作用
化学工程
核化学
材料科学
光化学
有机化学
纳米技术
光电子学
工程类
作者
Elena M. Seftel,M. Niarchos,Ch. Mitropoulos,Myrjam Mertens,Etienne F. Vansant,Pegie Cool
标识
DOI:10.1016/j.cattod.2014.10.030
摘要
Herein, we report the formation of a series of nanocomposites composed of LDH structures and TiO2 with anatase crystal phase. The structure of the LDH clay was modulated by the insertion of different di-, tri- or tetravalent cations, such as Zn2+, Cu2+, Al3+, Fe3+ or Ti4+, within the brucite-like sheets. Afterwards, the anatase seeds were deposited onto the LDH clays, obtaining new nanocomposite systems with tailored photocatalytic activity. In this way, the photoresponsive properties of the final nanocomposites were shifted from the UV to the visible range of the solar spectrum. The obtained nanocomposites were tested for the degradation of different organic pollutants, like phenol and methylene blue, under UV and visible light in aqueous media with different pH. The kinetic study showed that the TiO2@LDH nanocomposites are efficient for the phenol (and its intermediary species catechol and hydroquinone) and methylene blue photocatalytic degradation under both UV and Vis light illumination.
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