Because rutile TiO₂ has a potential application of its effective utilization of indoor illumination in photocatalytic environmental purification, effort has been devoted to synthesizing advanced rutile materials. Herein, we report a rare rutile nanostructure, a rutile nanobundle, synthesised via a layered titanate conversion through a simple dilute HCl treatment and drying at room temperature. This rutile nanobundle shows visible light-responsive photocatalytic activity toward the oxidative decomposition of formic acid in water significantly higher than those of a commercial rutile and anatase-based benchmark TiO₂ (P25). The rutile nanobundle, moreover, can be used as a precursor in the synthesis of a mesoporous rutile embedded with a homogeneous distribution of tiny α-Fe₂O₃ nanoparticles. The α-Fe₂O₃-embedded rutile shows superior photocatalytic activity that is up to 3 times higher than a pristine rutile nanobundle and even comparable to a more costly state-of-the-art visible light-responsive photocatalyst, Au nanoparticle-supported P25.

中文翻译：

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金红石 TiO2 纳米束作为嵌入 Fe2O3 的高效可见光光催化剂的前体

由于金红石TiO ₂具有有效利用室内照明在光催化环境净化中的潜在应用，因此致力于合成先进的金红石材料。在此，我们报告了一种罕见的金红石纳米结构，即金红石纳米束，通过简单的稀盐酸处理和室温干燥，通过层状钛酸盐转化合成。这种金红石纳米束对甲酸在水中的氧化分解显示出可见光响应光催化活性，显着高于商业金红石和锐钛矿基基准 TiO ₂(P25)。此外，金红石纳米束可用作合成中孔金红石的前体，其中嵌入了均匀分布的微小 α-Fe ₂ O ₃纳米颗粒。嵌入α-Fe ₂ O ₃的金红石显示出优异的光催化活性，比原始金红石纳米团高 3 倍，甚至可与更昂贵的最先进的可见光响应光催化剂、Au 纳米颗粒负载相媲美P25。