Institute of Nanotechnology and Materials Engineering, and Advanced Materials Centre, Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdansk, Poland.
Faculty of Chemistry, Gdansk University of Technology, Narutowicza St. 11/12, 80-233, Gdansk, Poland.
Sci Rep. 2023 Mar 9;13(1):3946. doi: 10.1038/s41598-023-31130-9.
Solar-driven photocatalysis has shown great potential as a sustainable wastewater treatment technology that utilizes clean solar energy for pollutant degradation. Consequently, much attention is being paid to the development of new, efficient and low-cost photocatalyst materials. In this study, we report the photocatalytic activity of NHVO (NVO) and its composite with rGO (NVO/rGO). Samples were synthesized via a facile one-pot hydrothermal method and successfully characterized using XRD, FTIR, Raman, XPS, XAS, TG-MS, SEM, TEM, N adsorption, PL and UV‒vis DRS. The results indicate that the obtained NVO and NVO/rGO photocatalysts exhibited efficient absorption in the visible wavelength region, a high content of V surface species and a well-developed surface area. Such features resulted in excellent performance in methylene blue photodegradation under simulated solar light illumination. In addition, the composite of NHVO with rGO accelerates the photooxidation of the dye and is beneficial for photocatalyst reusability. Moreover, it was shown that the NVO/rGO composite can be successfully used not only for the photooxidation of organic pollution but also for the photoreduction of inorganic pollutants such as Cr(VI). Finally, an active species trapping experiment was conducted, and the photodegradation mechanism was discussed.
太阳能驱动的光催化作为一种可持续的废水处理技术，利用清洁的太阳能来降解污染物，具有巨大的潜力。因此，人们非常关注新型、高效和低成本光催化剂材料的开发。在本研究中，我们报告了 NHVO（NVO）及其与 rGO 的复合材料（NVO/rGO）的光催化活性。通过简便的一锅水热法合成了样品，并通过 XRD、FTIR、拉曼、XPS、XAS、TG-MS、SEM、TEM、N 吸附、PL 和 UV-vis DRS 进行了成功的表征。结果表明，所获得的 NVO 和 NVO/rGO 光催化剂在模拟太阳光照射下具有高效的可见光波长区域吸收、高含量的 V 表面物种和发达的表面积。这些特征使得它们在亚甲基蓝光降解方面表现出优异的性能。此外，NHVO 与 rGO 的复合材料加速了染料的光氧化，有利于光催化剂的可重复使用。此外，还表明 NVO/rGO 复合材料不仅可成功用于有机污染物的光氧化，还可用于 Cr(VI)等无机污染物的光还原。最后，进行了活性物质捕获实验，并讨论了光降解机制。
