Purpose

The widespread use of styrene along with its harmful effects on human health has led to many studies on how to control and reduce its vapors in the workplace. In this study, efficient removal of styrene molecules in the gas phase was attempted by using Y-ZnO/WO₃ hybrid photocatalysts.

Methods

ZnO/WO₃ nanocomposites with different WO₃ Wt% were prepared and immobilized on Y-zeolite. The samples’ characteristics were evaluated using X-ray diffraction (XRD), energy dispersive X-ray spectrum (EDS), Brunauer-Emmet-Teller (BET) and field emission scanning electron microscopy (FESEM).

Results

The Y- ZnO/WO₃ catalyst exhibits an improved photocatalytic activity as compared to Y-ZnO and Y-zeolite alone. This higher photocatalytic activity of the ZnO/WO₃ supported on Y-zeolite can be attributed to a more efficient interaction of the ZnO/WO₃ with the zeolite leading to higher adsorption capacities. Results reveal that the photocatalyst was highly photoactive in mineralizing styrene. The high activity can be attributed to the synergetic effects of strong UV, ZnO/WO₃ nanocomposite and surface hydroxyl groups. The photocatalytic degradation reaction of styrene with the Y-ZnO/WO₃ follows Langmuir-Hinshelwood kinetics.

Conclusions

The results of this study indicate that this photocatalyst is suitable for the removal of styrene under UV light. The highest removal efficiency achieved was with Y-ZnO/WO₃ at 2%.

Graphical abstract

中文翻译：

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Y型沸石固定化合成ZnO/WO 3 纳米复合材料的光催化去除气相苯乙烯的活性

目的

苯乙烯的广泛使用及其对人类健康的有害影响导致了许多关于如何控制和减少工作场所中其蒸气的研究。_{在本研究中，尝试使用 Y-ZnO/WO 3}杂化光催化剂有效去除气相中的苯乙烯分子。

方法

制备具有不同WO ₃ Wt%的ZnO/WO ₃纳米复合材料并将其固定在Y-沸石上。使用 X 射线衍射 (XRD)、能量色散 X 射线光谱 (EDS)、Brunauer-Emmet-Teller (BET) 和场发射扫描电子显微镜 (FESEM) 评估样品的特性。

结果

与单独的Y-ZnO和Y-沸石相比，Y- ZnO/WO _{3催化剂表现出改进的光催化活性。Y-沸石负载的ZnO/WO 3}的这种更高的光催化活性可归因于ZnO/WO ₃与沸石的更有效的相互作用导致更高的吸附容量。结果表明，该光催化剂在矿化苯乙烯中具有很高的光活性。高活性可归因于强紫外线、ZnO/WO ₃纳米复合材料和表面羟基的协同作用。苯乙烯与 Y-ZnO/WO ₃的光催化降解反应遵循 Langmuir-Hinshelwood 动力学。

结论

这项研究的结果表明，这种光催化剂适用于在紫外光下去除苯乙烯。_{Y-ZnO/WO 3}达到的最高去除效率为 2%。

图形概要