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Facile Hydrothermal Synthesis of Tungsten Tri-oxide/Titanium Di-oxide Nanohybrid Structures as Photocatalyst for Wastewater Treatment Application
Journal of Cluster Science ( IF 2.7 ) Pub Date : 2021-04-05 , DOI: 10.1007/s10876-021-02053-0
Ujwala O. Bhagwat , Karthik Raja Kumar , Asad Syed , Najat Marraiki , Vinoth Kumar Ponnusamy , Sambandam Anandan

In this study, tungsten trioxide/titanium dioxide (WO3–TiO2) nanohybrid structures were prepared using a facile hydrothermal method. The nanosheets-like morphology was achieved for the prepared WO3–TiO2 nanohybrid that were confirmed by scanning electron microscopy. Provided X-ray photoelectron spectroscopy results also confirm the element existence and surface composition of the nanohybrid structure. The optical properties of the WO3–TiO2 nanohybrid were verified using UV–Visible diffuse reflectance spectroscopy (UV–Vis DRS) and photoluminescence spectroscopy. The UV–Vis DRS results indicated that the absorption edge for the WO3–TiO2 nanohybrid found a red shift towards the visible region due to the reduced bandgap (2.83 eV). The photocatalytic activity of the as-prepared WO3–TiO2 nanohybrid was evaluated by the photocatalytic degradation of Orange G dye in wastewaters under visible light. 94% Orange G dye was degraded in 210 min at neutral pH in the presence of WO3–TiO2 nanohybrid, which indicates the enhanced photocatalytic activity. The photo-luminescence technique has also confirmed the formation of –OH radicals during photodegradation by utilizing terephthalic acid as a probe molecule. These results indicate that the prepared nanohybrid material is a simple, low-cost, and efficient photocatalyst for the degradation of pollutants in wastewater treatment applications.



中文翻译:

轻水热法合成三氧化钨/二氧化钛纳米杂化结构作为光催化剂在废水处理中的应用

在这项研究中,使用简便的水热法制备了三氧化钨/二氧化钛(WO 3 -TiO 2)纳米杂化结构。制备的WO 3 -TiO 2纳米杂化物达到了纳米片状形态,这通过扫描电子显微镜得到了证实。提供的X射线光电子能谱结果还证实了纳米杂化结构的元素存在和表面组成。WO 3 -TiO 2纳米杂化物的光学性质通过紫外可见漫反射光谱法(UV-Vis DRS)和光致发光光谱法进行了验证。UV-Vis DRS结果表明,WO 3 -TiO 2的吸收边缘由于降低了带隙(2.83 eV),nanohybrid发现了一个向可见区域的红移。通过在可见光下对废水中的橙G染料进行光催化降解,评估了所制备的WO 3 -TiO 2纳米杂化物的光催化活性。在WO 3 –TiO 2存在下,在中性pH条件下,210分钟内94%的橙色G染料被降解纳米杂化物,表明光催化活性增强。通过使用对苯二甲酸作为探针分子,光致发光技术还证实了光降解过程中-OH自由基的形成。这些结果表明,所制备的纳米杂化材料是用于废水处理应用中的污染物降解的简单,低成本且有效的光催化剂。

更新日期:2021-04-05
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