A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation
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...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/7/2589 |
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| author | Xabier Sandua Pedro J. Rivero Ana Conde Joseba Esparza Rafael Rodríguez |
| author_facet | Xabier Sandua Pedro J. Rivero Ana Conde Joseba Esparza Rafael Rodríguez |
| author_sort | Xabier Sandua |
| collection | DOAJ |
| description | 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<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> 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. |
| first_indexed | 2024-03-11T05:32:48Z |
| format | Article |
| id | doaj.art-65ed4e9257cd4314b4e2e36ee1ea5983 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T05:32:48Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-65ed4e9257cd4314b4e2e36ee1ea59832023-11-17T17:02:11ZengMDPI AGMaterials1996-19442023-03-01167258910.3390/ma16072589A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B DegradationXabier Sandua0Pedro J. Rivero1Ana Conde2Joseba Esparza3Rafael Rodríguez4Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, SpainEngineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, SpainNational Center for Metallurgical Research (CENIM-CSIC), Gregorio del Amo Avenue 8, 28040 Madrid, SpainCentre of Advanced Surface Engineering, AIN, 31191 Cordovilla, SpainEngineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, SpainThis 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<sub>2</sub> 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<sub>2</sub> 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<sub>2</sub> 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.https://www.mdpi.com/1996-1944/16/7/2589photocatalysiswettabilityelectrosprayingsprayingdip coating |
| spellingShingle | Xabier Sandua Pedro J. Rivero Ana Conde Joseba Esparza Rafael Rodríguez A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation Materials photocatalysis wettability electrospraying spraying dip coating |
| title | A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation |
| title_full | A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation |
| title_fullStr | A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation |
| title_full_unstemmed | A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation |
| title_short | A Comparative Study in the Design of TiO<sub>2</sub> Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation |
| title_sort | comparative study in the design of tio sub 2 sub assisted photocatalytic coatings monitored by controlling hydrophilic behavior and rhodamine b degradation |
| topic | photocatalysis wettability electrospraying spraying dip coating |
| url | https://www.mdpi.com/1996-1944/16/7/2589 |
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