Key Lab. Eco-Functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
Environ Sci Pollut Res Int. 2022 Nov;29(54):82297-82308. doi: 10.1007/s11356-022-21633-9. Epub 2022 Jun 25.
In nowadays, environmental pollution has been greatly improved, but the development of low-cost and environmentally friendly materials are still challenge in the field of water treatment. Herein, a cheap and eco-friendly natural loess particle (LoP) was used for in situ growth of tungsten trioxide nanocubes (WONCs) on its surface via a simple one-pot hydrothermal method, which afforded a stable loess-based photocatalyst (WONCs@LoP). It was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) analysis, UV-Vis diffuse reflectance spectra (UV-Vis DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic performances of WONCs@LoP were applied to photodegradation of organics under visible-light illumination. It was found that the removal rate of methylene blue (MB) got to 99% within 20 min, which was higher than that of materials, such as pure LoP and WONCs. Moreover, the photocatalytic activity of WONCs@LoP remained 85% after 9 cycling times, indicating its high stability and reusability. It was suggested that the synergy of the well narrowed band gap and effectual control of e-h recombination in WONCs@LoP improve its photodegradation efficiency. In summary, using natural minerals (LoP) as carrier, a novel eco-friendly photocatalyst could be explored for photodegradation of organic pollutions in wastewater treatment.
在当今社会，环境污染已经得到了很大的改善，但在水处理领域，开发低成本、环保的材料仍然是一个挑战。在此，我们通过一种简单的一锅水热法，以廉价且环保的天然黄土颗粒（LoP）为载体，在其表面原位生长了三氧化钨纳米立方（WONCs），得到了一种稳定的基于黄土的光催化剂（WONCs@LoP）。通过扫描电子显微镜（SEM）、X 射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）分析、紫外-可见漫反射光谱（UV-Vis DRS）和 X 射线光电子能谱（XPS）对其进行了表征。WONCs@LoP 的光催化性能被应用于可见光照射下有机物的光降解。结果发现，在 20 分钟内，亚甲基蓝（MB）的去除率达到 99%，高于纯 LoP 和 WONCs 等材料。此外，WONCs@LoP 在 9 次循环后仍保持 85%的光催化活性，表明其具有较高的稳定性和可重复使用性。这表明 WONCs@LoP 中较好的禁带宽度缩小和有效控制 e-h 复合协同作用提高了其光降解效率。总之，利用天然矿物质（LoP）作为载体，可以探索出一种新型的环保光催化剂，用于处理废水中的有机污染物。
