Dual modification of TiO2 nanorod arrays with SiW11Co and Ag nanoparticles for enhanced photocatalytic activity under simulated sunlight†,Photochemical & Photobiological Sciences

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Dual modification of TiO2 nanorod arrays with SiW11Co and Ag nanoparticles for enhanced photocatalytic activity under simulated sunlight†
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2019-10-15 , DOI: 10.1039/c9pp00327d
Dandan Yan _{1,

2,

3,

4,

5} , Wencheng Fang _{1,

2,

3,

4,

5} , Fengyan Li _{1,

2,

3,

4,

5} , Zhanbin Jin _{1,

2,

3,

4,

5} , Lin Xu _{1,

2,

3,

4,

5}

Affiliation

Well-organized TiO₂ nanorod arrays (TNRs) have increasingly attracted our attention in recent years due to their excellent photocatalytic properties. However, it is of great importance to prepare more efficient photocatalysts using a facile method towards their more widespread use. In this work, K₆SiW₁₁O₃₉Co(II)(H₂O) (SiW₁₁Co) and Ag nanoparticles were introduced into TNRs using spin-coating and chemical bath deposition methods. It was found that TNRs/SiW₁₁Co/Ag composite films with an active area of only 1 cm² exhibit highly efficient and sustainable properties for the photodegradation of NO₂ and display a significant enhancement compared with P₂₅ and pure TNRs. Photocatalytic measurements demonstrated that both SiW₁₁Co and Ag synergistically improve the light absorption and charge separation efficiency, thus obtaining the most efficient photocatalytic performance. In addition, the probable photocatalytic mechanism and the dominating active species for NO₂ photodegradation were also proposed, in order to testify the effectively enhanced photocatalytic ability of the TNRs/SiW₁₁Co/Ag composite. Hence, the design of these polyoxometalate and metal particle co-modified TNRs may provide a new tactic for developing promising materials for photocatalytic degradation.

中文翻译：

用SiW ₁₁ Co和Ag纳米粒子对 TiO ₂纳米棒阵列进行双重修饰，以增强模拟阳光下的光催化活性†

近年来，组织良好的TiO ₂纳米棒阵列（TNR）由于其出色的光催化性能而日益引起我们的注意。然而，使用简便的方法制备更有效的光催化剂对于其更广泛的使用是非常重要的。在这项工作中，使用旋涂和化学浴沉积方法将K ₆ SiW ₁₁ O ₃₉ Co（II）（H ₂ O）（SiW ₁₁ Co）和Ag纳米颗粒引入TNR中。研究发现，活性面积仅为1 cm ^2的TNRs / SiW ₁₁ Co / Ag复合膜表现出高效，可持续的NO ₂光降解性能。与P ₂₅和纯TNR相比，显示出显着增强。光催化测量表明，SiW ₁₁ Co和Ag协同提高了光吸收和电荷分离效率，从而获得了最有效的光催化性能。此外，还提出了可能的光催化机理和主要的活性物质对NO _2的光降解作用，以证明TNRs / SiW ₁₁ Co / Ag复合材料的光催化能力得到了有效增强。因此，这些多金属氧酸盐和金属颗粒共改性的TNR的设计可为开发有前途的光催化降解材料提供新的策略。

更新日期：2019-11-06

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