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首页> 外文期刊>Materials Science and Engineering >Cool and photocatalytic reddish-brown nanostructured Fe_2O_3@SiO_2@TiO_2 pigments
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Cool and photocatalytic reddish-brown nanostructured Fe_2O_3@SiO_2@TiO_2 pigments

机译：凉爽和光催化红褐色纳米结构Fe_2O_3 @ SiO_2 @ TiO_2颜料

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摘要

In the present study, the influence of the crystalline structure of Fe_2O_(3(amorphous)) @TiO_2, α-Fe_2O_3@TiO_2 and α-Fe_2O_3 @ SiO_2 @TiO_2 nanocomposites on the NIR-reflectance and photocatalytic properties have been investigated. The nano-sized α-Fe_2O_3, SiO_2 and TiO_2 were prepared via co-precipitation, Stober and sol-gel methods, respectively. The photocatalytic performance of the nanoparticles was examined by the photodegradation of Acid Red18 under UV irradiation after 120 min of reaction. NIR-diffuse reflectance and colorimetric parameters were measured. The results showed that the TiO_2 coating has considerably enhanced the photocatalytic activity and the NIR-reflectance. Fe_2O_(3(amorphous)) @TiO_2 nanocomposite possesses the highest NIR- reflection and α-Fe_2O_3 @TiO_2 reveals the maximum photocatalytic degradation. Silica coating in the α-Fe_2O_3@SiO_2@TiO_2 nanocomposite has been boosted both of the NIR-reflectance and photocatalytic degradation to their maximum level. As a result, this multipurpose composite is suitable to be simultaneously developed for both photocatalytic and cool pigment applications.
机译：研究了Fe_2O_（3（无定形））@ TiO_2，α-Fe_2O_3 @ TiO_2和α-Fe_2O_3 @ SiO_2 @ TiO_2纳米复合材料的影响已经研究了在NIR反射和光催化性质上的影响。纳米尺寸的α-Fe_2O_3，SiO_2和TiO_2分别通过共沉淀，溶液和溶胶 - 凝胶方法制备。通过在120分钟反应后，通过在UV照射下的酸RED18的光降解来检查纳米颗粒的光催化性能。测量了NIR-漫反射率和比色参数。结果表明，TiO_2涂层显着增强了光催化活性和NIR反射率。 FE_2O_（3（非晶））@ TiO_2纳米复合材料具有最高的NIR-反射，α-FE_2O_3 @ TiO_2显示最大的光催化降解。在α-Fe_2O_3 @ SiO_2 @ TiO_2纳米复合材料中的二氧化硅涂层已促进了NIR反射率和光催化降解到其最大水平。结果，该多功能复合材料适用于光催化和凉爽颜料应用。

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