Abstract A simple low-temperature (< 100 °C) hot-water treatment was used to synthesize Fe–N co-doped anatase nanocrystals which were uniformly dispersed in micro–mesoporous SiO 2 host film for the first time. The Fe–N co-doped TiO 2 –SiO 2 (FNTS) film exhibited stable photocatalytic activities. A NO removal efficiency of 56.1% was achieved under simulated solar light irradiation without any obvious inactivation in 30 min. The transient photocurrent response of FNTS film is approximately six times higher than that of non-doped TiO 2 –SiO 2 film, indicating the superior charge separation of photo-generated electron–hole pairs. Electron spin resonance analysis showed that the ·OH and ·O 2 − radicals were key species to remove NO. Combined with quantitative reaction intermediates, the possible photocatalytic degradation mechanism of NO over FNTS film was proposed. In addition, the FNTS thin films exhibited intrinsic super-hydrophilicity and durable self-cleaning property even after 6 months of storage in the dark. This work provides a facile method to load the catalyst on thermal labile substrates, such as soda–lime glass and organic polymer for more practical applications. Graphic Abstract A simple low-temperature (< 100 °C) hot-water treatment was used to synthesize micro–mesoporous TiO 2 –SiO 2 composite film, which shows good self-cleaning ability and superior photodegradation activity for NO removal under solar light.

中文翻译：

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低温合成含 Fe-N 共掺杂锐钛矿纳米晶的微介孔 TiO2-SiO2 复合膜用于光催化 NO 去除

摘要 采用简单的低温 (< 100 °C) 热水处理首次合成了均匀分散在微介孔 SiO 2 基质膜中的 Fe-N 共掺杂锐钛矿纳米晶。Fe-N共掺杂的TiO 2 -SiO 2 (FNTS)薄膜表现出稳定的光催化活性。在模拟太阳光照射下，NO 去除效率达到 56.1%，30 分钟内没有任何明显的失活。FNTS 薄膜的瞬态光电流响应比未掺杂的 TiO 2 -SiO 2 薄膜高约六倍，表明光生电子-空穴对具有优异的电荷分离能力。电子自旋共振分析表明·OH和·O 2 - 自由基是去除NO的关键物质。结合定量反应中间体，提出了NO在FNTS薄膜上可能的光催化降解机制。此外，即使在黑暗中储存 6 个月后，FNTS 薄膜仍表现出固有的超亲水性和持久的自清洁性能。这项工作提供了一种将催化剂负载在热不稳定基材上的简便方法，例如钠钙玻璃和有机聚合物，以用于更实际的应用。图形摘要 采用简单的低温 (< 100 °C) 热水处理合成了微介孔 TiO 2 -SiO 2 复合薄膜，该复合薄膜具有良好的自清洁能力和优异的光降解能力，可在太阳光下去除 NO。这项工作提供了一种将催化剂负载在热不稳定基材上的简便方法，例如钠钙玻璃和有机聚合物，以用于更实际的应用。图形摘要 采用简单的低温 (< 100 °C) 热水处理合成了微介孔 TiO 2 -SiO 2 复合薄膜，该复合薄膜具有良好的自清洁能力和优异的光降解能力，可在太阳光下去除 NO。这项工作提供了一种将催化剂负载在热不稳定基材上的简便方法，例如钠钙玻璃和有机聚合物，以用于更实际的应用。图形摘要 采用简单的低温 (< 100 °C) 热水处理合成了微介孔 TiO 2 -SiO 2 复合薄膜，该复合薄膜具有良好的自清洁能力和优异的光降解能力，可在太阳光下去除 NO。