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首页> 外文期刊>Journal of Hazardous Materials >Photocatalysis as an advanced reduction process (ARP): The reduction of 4-nitrophenol using titania nanotubes-ferrite nanocomposites
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Photocatalysis as an advanced reduction process (ARP): The reduction of 4-nitrophenol using titania nanotubes-ferrite nanocomposites

机译：作为高级还原过程（ARP）的光催化：使用二氧化钛纳米管-铁氧体纳米复合材料还原4-硝基苯酚

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TiO2 photocatalysis is an advanced process, employed worldwide for the oxidation of organic compounds, that leads to significant technological applications in the fields of health and environment. The use of the photo catalytic approach in reduction reactions seems very promising and can open new horizons for green chemistry synthesis. For this purpose, titanium dioxide nanotubes (TNTs) were developed in autoclave conditions using TiO2 P25 as a precursor material. Based on these nanotubular substrates, TiO2/CoFe2O4 (TCF) nanocomposites were further obtained by wet impregnation method. The materials were thoroughly characterized and their structural, textural, vibrational, optoelectronic and magnetic properties were determined. The composite materials combine absorbance in the visible optical range and high BET surface area values (similar to 100 m(2)/g), showing extremely high yield in the photocatalytic reduction of 4-nitrophenol (4-NP), exceeding 94% within short illumination time (only 35 min). The developed nanocomposites were successfully reused in consecutive photo catalytic experiments and were easily removed from the reaction medium using magnets. Both remarkable recycling ability and high-performance stability in the photocatalytic reduction of nitrophenol were observed, thus justifying the significant economic potential and industrial perspectives for this advanced reduction process.
机译：TiO2光催化是一种先进的工艺，已在世界范围内用于氧化有机化合物，在健康和环境领域带来了重要的技术应用。在还原反应中使用光催化方法似乎很有希望，并且可以为绿色化学合成开辟新的前景。为此，使用TiO2 P25作为前体材料在高压釜条件下开发了二氧化钛纳米管（TNT）。在这些纳米管基底的基础上，通过湿法浸渍法进一步获得了TiO2 / CoFe2O4（TCF）纳米复合材料。对材料进行了彻底的表征，并确定了它们的结构，结构，振动，光电和磁性能。该复合材料结合了可见光范围内的吸收率和高BET表面积值（类似于100 m（2）/ g），在光催化还原4-硝基苯酚（4-NP）方面显示出极高的产率，在94％的范围内超过94％照明时间短（仅35分钟）。所开发的纳米复合材料已成功地在连续的光催化实验中重复使用，并易于使用磁体从反应介质中去除。在硝基苯酚的光催化还原中，观察到了出色的循环能力和高性能稳定性，因此证明了这种先进的还原工艺具有巨大的经济潜力和工业前景。

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