{"title":"The application of TiO2@UiO-66-(OH)2 composites for the photocatalytic degradation of gaseous formaldehyde under visible light","authors":"Mengyao Hua, Siyi Wang, Meng Cheng, Guangming Liang, Lei Xu, Yafen Zhou","doi":"10.1016/j.jphotochem.2025.116328","DOIUrl":null,"url":null,"abstract":"<div><div>Photocatalysts TiO<sub>2</sub>@UiO-66-(OH)<sub>2</sub> was successfully synthesized via an impregnation method for removal of formaldehyde under high pressure mercury lamp irradiation, and the photocatalysts were characterized by using a variety of analytical techniques. The characterized results indicated that TiO<sub>2</sub> was attached to the surface of UiO-66-(OH)<sub>2</sub>, and there was a strong electronic interaction between the elements of TiO<sub>2</sub> and UiO-66-(OH)<sub>2</sub> in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH)<sub>2</sub>, high dispersion of TiO<sub>2</sub> and efficient interfacial charge transfer between UiO-66-(OH)<sub>2</sub> and TiO<sub>2</sub> have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. And the hydroxyl radicals (⋅OH) and superoxide radicals (⋅O<sub>2</sub><sup>−</sup>) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 20TiO<sub>2</sub>@UO (1 g 0.15 m<sup>3</sup>) is 83.01 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 91.49 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst. This could provide a useful method for highly efficient formaldehyde in indoor air purification.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116328"},"PeriodicalIF":4.1000,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Photochemistry and Photobiology A-chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1010603025000681","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Photocatalysts TiO2@UiO-66-(OH)2 was successfully synthesized via an impregnation method for removal of formaldehyde under high pressure mercury lamp irradiation, and the photocatalysts were characterized by using a variety of analytical techniques. The characterized results indicated that TiO2 was attached to the surface of UiO-66-(OH)2, and there was a strong electronic interaction between the elements of TiO2 and UiO-66-(OH)2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH)2, high dispersion of TiO2 and efficient interfacial charge transfer between UiO-66-(OH)2 and TiO2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. And the hydroxyl radicals (⋅OH) and superoxide radicals (⋅O2−) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 20TiO2@UO (1 g 0.15 m3) is 83.01 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 91.49 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst. This could provide a useful method for highly efficient formaldehyde in indoor air purification.
期刊介绍：
JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds.
All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor).
The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.
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