Core–shell structure [Formula: see text] was synthesized by sol–gel method. The photocatalytic degradation of methylene blue over the [Formula: see text] reached 98% under UV light irradiation within 5 h. The band gap of the core–shell [Formula: see text] was found to have a redshift through a sintering treatment. The redshifted [Formula: see text] had a good performance of methylene-blue degradation (reaching 85%) under visible light irradiation for 5 h.

中文翻译：

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溶胶-凝胶法合成的Fe@TiO2核壳复合材料的可见光光催化活性

核壳结构[公式：见正文]采用溶胶-凝胶法合成。[分子式：见正文]在紫外光照射下5小时内对亚甲蓝的光催化降解达到98%。通过烧结处理发现核壳的带隙[公式：见正文]具有红移。红移的[分子式：见正文]在可见光照射5 h下具有良好的亚甲蓝降解性能（达到85%）。