It is crucial to explore a facile synthesis of rutile TiO₂ nanorods anchored at carbon cloth at low temperature for applicable air purifier. Herein, antler-like TiO₂ rectangular bunched arrays were grown on carbon cloth by a hydrothermal method, and fluorine was doped into TiO₂ with solid diffusion of NH₄F at 300 °C. Fluorine doping induces oxygen vacancies in TiO₂, facilitating the charge transfer and providing more active sites for photocatalytic reactions. The F doped TiO₂ exhibits excellent photocatalytic oxidation of formaldehyde under UV and visible LED irradiation. UV–vis DRS and UPS results indicate that 3F-T@CC can harvest more visible light, and has the suitable energy band structure to generate hydroxyl radical and superoxide radical for the effective degradation of formaldehyde. EPR measurements prove the photogenerated superoxide radial (\(\cdot {\text{O}}_{2}^{ - }\)) and hydroxyl radical (·OH) are involved in oxidizing formaldehyde into CO₂ and H₂O.

Graphic Abstract

Photocatalytic degradation of formaldehyde by fluorine doped rutile TiO₂ nanorod arrays on carbon cloth.

中文翻译：

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用于光催化去除甲醛的氟掺杂金红石 TiO2 纳米棒阵列的简便合成

探索在适用的空气净化器中在低温下轻松合成固定在碳布上的金红石TiO ₂纳米棒至关重要。在此，通过水热法在碳布上生长鹿角状TiO ₂矩形束阵列，并在300℃下通过NH ₄ F的固体扩散将氟掺杂到TiO _{2 中}。氟掺杂在TiO _{2 中}诱导氧空位，促进电荷转移并为光催化反应提供更多活性位点。F掺杂的TiO ₂在紫外线和可见光 LED 照射下表现出优异的甲醛光催化氧化。UV-vis DRS和UPS结果表明3F-T@CC可以收获更多的可见光，并且具有合适的能带结构，产生羟基自由基和超氧自由基有效降解甲醛。EPR 测量证明光生超氧化物径向 ( \(\cdot {\text{O}}_{2}^{ - }\) ) 和羟基自由基 (·OH) 参与将甲醛氧化成 CO ₂和 H ₂ O。

图形摘要

碳布上掺氟的金红石TiO ₂纳米棒阵列光催化降解甲醛。