{"title":"FeWO4/g-C3N5 heterostructure for highly efficient visible-light-driven photocatalytic degradation of organic dyes","authors":"Quan-Liang Chen, Hua-Lin Chen","doi":"10.1007/s11051-024-06105-0","DOIUrl":null,"url":null,"abstract":"<div><p>FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> composites were prepared by a facile hydrothermal method. The composition and morphology of the catalysts were characterized by infrared spectroscopy (IR), X-ray powder diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). The composition of FeWO<sub>4</sub> and g-C<sub>3</sub>N<sub>5</sub> successfully reduces the band gap of g-C<sub>3</sub>N<sub>5</sub> and broadens visible light response range. Moreover, the as-prepared FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> composites inhibit the recombination of photoinduced carriers and improve the charge mobility. FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> composites exhibit significantly enhanced photocatalytic activity for the degradation of organic dyes including methylene blue (MB), rhodamine B (RhB), and methyl orange (MO) under visible light irradiation. As for the MB degradation, the best degradation kinetic rate constant of FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> composite is 3.6 times higher than that of pristine g-C<sub>3</sub>N<sub>5</sub>. Moreover, FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> composite shows good photostability and reusability after cycling experiments, which may be used for the treatment of real wastewater. A Z-scheme mechanism of dye photodegradation by FeWO<sub>4</sub>/g-C<sub>3</sub>N<sub>5</sub> composite was also proposed based on the trapping experiment of the responsible radical species.</p></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"26 8","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoparticle Research","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11051-024-06105-0","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
FeWO4/g-C3N5 composites were prepared by a facile hydrothermal method. The composition and morphology of the catalysts were characterized by infrared spectroscopy (IR), X-ray powder diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). The composition of FeWO4 and g-C3N5 successfully reduces the band gap of g-C3N5 and broadens visible light response range. Moreover, the as-prepared FeWO4/g-C3N5 composites inhibit the recombination of photoinduced carriers and improve the charge mobility. FeWO4/g-C3N5 composites exhibit significantly enhanced photocatalytic activity for the degradation of organic dyes including methylene blue (MB), rhodamine B (RhB), and methyl orange (MO) under visible light irradiation. As for the MB degradation, the best degradation kinetic rate constant of FeWO4/g-C3N5 composite is 3.6 times higher than that of pristine g-C3N5. Moreover, FeWO4/g-C3N5 composite shows good photostability and reusability after cycling experiments, which may be used for the treatment of real wastewater. A Z-scheme mechanism of dye photodegradation by FeWO4/g-C3N5 composite was also proposed based on the trapping experiment of the responsible radical species.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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