Fe/CeO 2 –SiO 2 nanocomposite was synthesized by using zwitterionic surfactant 3-( N , N -dimethyloctadecylammonio) propane sulfonate (SB3-18) by sol–gel and hydrothermal methods. The nanocomposite was well characterized before its use. X-ray diffraction (XRD) results confirmed the synthesis of the Fe/CeO 2 –SiO 2 nanocomposite. Crystallite size calculated by using Scherrer equation was 5.33 nm while it was found 5.26 nm by Williamson–Hall equation. Bandgap of Fe/CeO 2 –SiO 2 nanocomposite shows redshift after the doping of Fe. Degradation studies of methylene blue (MB) and chlorpyrifos (CP) were investigated by nanofiltration (NF) column under visible light irradiation. Degradation and adsorption of MB was investigated by three different types of columns under visible light irradiation. It was observed to achieve 100 % removal of MB and 91 % of CP through column in which rice husk ash (RHA) slurry was mixed with the nanocomposite.

中文翻译：

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一种含有稻壳灰和 Fe/CeO2-SiO2 纳米复合材料混合物的高效纳滤系统，用于去除偶氮染料和农药

Fe/CeO 2 -SiO 2 纳米复合材料是用两性离子表面活性剂3-(N,N-二甲基十八烷基氨基)丙磺酸盐(SB3-18)通过溶胶-凝胶和水热法合成的。纳米复合材料在使用前已得到很好的表征。X 射线衍射 (XRD) 结果证实了 Fe/CeO 2 -SiO 2 纳米复合材料的合成。使用 Scherrer 方程计算的微晶尺寸为 5.33 nm，而使用 Williamson-Hall 方程计算为 5.26 nm。Fe/CeO 2 -SiO 2 纳米复合材料的带隙在掺杂Fe后显示红移。通过纳滤 (NF) 柱在可见光照射下研究了亚甲蓝 (MB) 和毒死蜱 (CP) 的降解研究。用三种不同类型的色谱柱在可见光照射下研究了 MB 的降解和吸附。