Sandua Xabier, Rivero Pedro J, Conde Ana, Esparza Joseba, Rodríguez Rafael
Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain.
Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain.
Materials (Basel). 2023 Mar 24;16(7):2589. doi: 10.3390/ma16072589.
This work presents a comparative study related to the photocatalytic efficiency associated with wettability measurements and organic dye degradation, as well as other relevant properties (i.e., corrosion resistance, roughness, wettability, and adhesion to a substrate). The photocatalytic precursors are titanium dioxide nanoparticles (TiO NPs) which are dispersed onto a polymeric electrospun fiber matrix by using three different deposition techniques such as electrospraying, spraying, and dip-coating, respectively. In this work, the host electrospun matrix is composed of poly(acrylic acid) fibers crosslinked with cyclodextrin (β-CD), which shows a good chemical affinity and stability with the other deposition techniques which are responsible for incorporating the TiO NPs. In order to evaluate the efficacy of each coating, the resultant photocatalytic activity has been monitored by two different tests. Firstly, the reduction in the water contact angle is appreciated, and secondly, the degradation of an organic dye (Rhodamine B) is observed under UV irradiation. In addition, the final roughness, adherence, and pitting corrosion potential have also been controlled in order to determine which solution provides the best combination of properties. Finally, the experimental results clearly indicate that the presence of TiO NPs deposited by the three techniques is enough to induce a super hydrophilic behavior after UV irradiation. However, there are notable differences in photocatalytic efficiency on the Rhodamine B as a function of the selected deposition technique.
这项工作呈现了一项比较研究，该研究涉及与润湿性测量和有机染料降解相关的光催化效率，以及其他相关特性（即耐腐蚀性、粗糙度、润湿性和对基材的附着力）。光催化前驱体是二氧化钛纳米颗粒（TiO NPs），它们分别通过三种不同的沉积技术，如电喷雾、喷涂和浸涂，分散在聚合物静电纺丝纤维基质上。在这项工作中，主体静电纺丝基质由与环糊精（β-CD）交联的聚丙烯酸纤维组成，它与负责掺入TiO NPs的其他沉积技术表现出良好的化学亲和力和稳定性。为了评估每种涂层的效果，通过两种不同的测试监测了所得的光催化活性。首先，观察到水接触角的减小，其次，在紫外线照射下观察到有机染料（罗丹明B）的降解。此外，还控制了最终的粗糙度、附着力和点蚀电位，以确定哪种溶液提供了最佳的性能组合。最后，实验结果清楚地表明，通过这三种技术沉积的TiO NPs的存在足以在紫外线照射后诱导超亲水性行为。然而，作为所选沉积技术的函数，对罗丹明B 的光催化效率存在显著差异。
