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首页> 外文期刊>RSC Advances >A visible-light-responsive TaON/CdS photocatalytic film with a ZnS passivation layer for highly extraordinary NO2 photodegradation
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A visible-light-responsive TaON/CdS photocatalytic film with a ZnS passivation layer for highly extraordinary NO2 photodegradation

机译：具有ZNS钝化层的可见光响应焦/ Cds光催化膜，用于高度非凡的NO2光降解

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Recently, TaON has become a promising photoelectrode material in the photocatalytic field owing to its suitable band gap and superior charge carrier transfer ability. In this work, we prepared a TaON/CdS photocatalytic film using a CdS nanoparticle-modified TaON film by the successive ionic layer adsorption and reaction (SILAR) method. For the first time, the ZnS nanoparticles were deposited on the TaON/CdS film using the same method. We found that pure TaON had a nanoporous morphology, thus resulting in high specific surface area and better gas adsorption capacity. Furthermore, the TaON/CdS/ZnS film displayed a highly efficient NO _(2) photodegradation rate under visible light irradiation owing to its stronger visible light response, photocorrosion preventive capacity, and the high separation efficiency of photo-induced electrons and holes. Interestingly, the promising TaON/CdS/ZnS film also possessed remarkable recyclability for NO _(2) degradation. Therefore, we suggest that the TaON/CdS/ZnS photocatalytic film might be used for the photocatalytic degradation of other pollutants or in other applications. We also put forward the feasible NO _(2) photocatalytic degradation mechanism for the TaON/CdS/ZnS film. From the schematic diagram, we could further obtain the photo-generated carrier transport process and NO _(2) photodegradation principle in detail over the ternary photocatalytic film. Moreover, the trapping experiment demonstrates that ·O _(2) ~(?) and h ~(+) all play significant roles in NO _(2) degradation under visible light irradiation.
机译：最近，由于其合适的带隙和优异的电荷载体转移能力，陶戎已成为光催化领域的有希望的光电极材料。在这项工作中，我们使用连续离子层吸附和反应（Sill）方法使用CDS纳米粒子改性延伸膜制备了陶口/ Cds光催化膜。首次使用相同的方法将ZnS纳米颗粒沉积在TaOn / Cds膜上。我们发现纯Taon具有纳米多孔形态，从而导致高比表面积和更好的气体吸附能力。此外，由于其较强的可见光响应，光腐蚀性预防能力和光诱导的电子和孔的高分离效率，Taon / Cds / ZnS膜在可见光照射下显示出高效的NO _（2）光降解速率。有趣的是，有前途的Taon / CDS / ZnS薄膜也具有显着的可回收性，无_（2）退化。因此，我们建议Taon / Cds / ZnS光催化膜可用于其他污染物或其他应用的光催化降解。我们还提出了Taon / Cds / ZnS膜的可行的NO _（2）光催化降解机制。根据示意图，我们可以进一步通过三元光催化膜详细获取光产生的载波运输过程和NO _（2）光降解原理。此外，诱捕实验表明·O _（2）〜（？）和H〜（+）所有在可见光照射下没有_（2）劣化的显着作用。

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