{"title":"Constructing g-C3N4-x/MoO3 Z-scheme heterojunction for photodegradation of tetracycline","authors":"","doi":"10.1016/j.jphotochem.2024.115941","DOIUrl":null,"url":null,"abstract":"<div><p>Utilizing photocatalysis to degrade antibiotics in wastewater is a vital strategy. Here, a Z-scheme heterojunction was synthesized, consisting of defect-rich porous g-C<sub>3</sub>N<sub>4</sub> and MoO<sub>3</sub>, which exhibits remarkable photocatalytic degradation of tetracycline (TC). The results revealed that the optimal heterojunction sample exhibited a 2.47-fold enhancement of degradation efficiency compared with porous g-C<sub>3</sub>N<sub>4-x</sub>. Characterization analysis shows that the significant enhancement is attributed to the synergistic effects arising from the Z-scheme heterostructure and the introduction of nitrogen (N) defects, which collectively enhance the charge separation and light absorption capabilities of the material. Electron paramagnetic resonance (EPR) spectroscopy and free radical quenching experiments indicate that the vital degradation mechanism is the assault of •O<sub>2</sub><sup>–</sup> and •OH on tetracycline. Additionally, the LC-MS studies demonstrated possible intermediates and degradation pathway of TC. The toxicity simulation analysis revealed that the heterojunction sample effectively mitigated the toxicity of tetracycline solution. This catalyst exhibits promising potential for applications in the elimination of antibiotics from aquatic environments.</p></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":null,"pages":null},"PeriodicalIF":4.1000,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1010603024004854/pdfft?md5=ed8f33ec0980c3e5f1a161d4d4aa7a96&pid=1-s2.0-S1010603024004854-main.pdf","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/S1010603024004854","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
Utilizing photocatalysis to degrade antibiotics in wastewater is a vital strategy. Here, a Z-scheme heterojunction was synthesized, consisting of defect-rich porous g-C3N4 and MoO3, which exhibits remarkable photocatalytic degradation of tetracycline (TC). The results revealed that the optimal heterojunction sample exhibited a 2.47-fold enhancement of degradation efficiency compared with porous g-C3N4-x. Characterization analysis shows that the significant enhancement is attributed to the synergistic effects arising from the Z-scheme heterostructure and the introduction of nitrogen (N) defects, which collectively enhance the charge separation and light absorption capabilities of the material. Electron paramagnetic resonance (EPR) spectroscopy and free radical quenching experiments indicate that the vital degradation mechanism is the assault of •O2– and •OH on tetracycline. Additionally, the LC-MS studies demonstrated possible intermediates and degradation pathway of TC. The toxicity simulation analysis revealed that the heterojunction sample effectively mitigated the toxicity of tetracycline solution. This catalyst exhibits promising potential for applications in the elimination of antibiotics from aquatic environments.
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.