This study presents a novel photocatalytic system exploiting the unique properties of ZrO_(2) and its integration with layered double hydroxide(LDH)films on porous coatings produced via plasma electrolytic oxidation(PE...This study presents a novel photocatalytic system exploiting the unique properties of ZrO_(2) and its integration with layered double hydroxide(LDH)films on porous coatings produced via plasma electrolytic oxidation(PEO).Herein,CoFe-LDHfilms were created on the porous surface of PEO-coated AZ31 Mg alloy using a hydrothermal treatment in cobalt and iron nitrate solutions,followed by a secondary hydrothermal process in a ZrO_(2) solution for 10 h at 70℃.The impact of ZrO_(2) on the morphological,compositional,and photocatalytic performance was then compared to the case where ZrO_(2) nanoparticles were electrophoretically incorporated into the porous PEO coating.Characterization results revealed that the ZrO_(2)-modified LDH coatings exhibited a dispersedflake-like structure with an increased surface area,a reduced band gap energy of 3.14 eV,and enhanced electron-hole separation.Experimental results demonstrated an outstanding 99.8%degradation of indigo carmine within 15 mins,with remarkable multi-cycle stability overfive consecutive cycles without significant performance decline.This system demonstrates faster degradation rates and greater durability compared to previously reported catalysts,underscoring its potential for effective and sustainable environmental remediation.The synergistic integration of ZrO_(2),LDH,and PEO highlights a promising strategy for wastewater treatment,particularly for the removal of persistent organic dyes like indigo carmine.展开更多
基金supported by the National Research Foundation of Korea(NRF)funded by the Korean government(MSIT)(No.2022R1A2C1006743).
文摘This study presents a novel photocatalytic system exploiting the unique properties of ZrO_(2) and its integration with layered double hydroxide(LDH)films on porous coatings produced via plasma electrolytic oxidation(PEO).Herein,CoFe-LDHfilms were created on the porous surface of PEO-coated AZ31 Mg alloy using a hydrothermal treatment in cobalt and iron nitrate solutions,followed by a secondary hydrothermal process in a ZrO_(2) solution for 10 h at 70℃.The impact of ZrO_(2) on the morphological,compositional,and photocatalytic performance was then compared to the case where ZrO_(2) nanoparticles were electrophoretically incorporated into the porous PEO coating.Characterization results revealed that the ZrO_(2)-modified LDH coatings exhibited a dispersedflake-like structure with an increased surface area,a reduced band gap energy of 3.14 eV,and enhanced electron-hole separation.Experimental results demonstrated an outstanding 99.8%degradation of indigo carmine within 15 mins,with remarkable multi-cycle stability overfive consecutive cycles without significant performance decline.This system demonstrates faster degradation rates and greater durability compared to previously reported catalysts,underscoring its potential for effective and sustainable environmental remediation.The synergistic integration of ZrO_(2),LDH,and PEO highlights a promising strategy for wastewater treatment,particularly for the removal of persistent organic dyes like indigo carmine.
