{"title":"Engineered Heterostructure Photocatalyst: Chitosan-Coated Chromium Ferrite/Graphite Oxide Synthesized Hydrothermally for Environmental Remediation","authors":"Shabnam Sheshmani, Nazila Mohammad Hosseini","doi":"10.1007/s10924-024-03433-z","DOIUrl":null,"url":null,"abstract":"<div><p>This study reports the hydrothermal synthesis and characterization of a chitosan-coated chromium ferrite/graphite oxide (CrFe<sub>2</sub>O<sub>4</sub>/GO/CS) nanocomposite with enhanced photocatalytic performance. The unique combination of the semiconductor properties of chromium ferrite, the light-harvesting capabilities of graphite oxide, and the stabilizing and adsorptive properties of chitosan resulted in a synergistic enhancement of the photocatalytic activity. The nanocomposite was characterized using FT-IR, Raman, XRD, zeta potential, DRS, BET, SEM, and EDS techniques. BET analysis revealed a specific surface area of 418.56 m²/g and a pore diameter of 2 nm for the CrFe<sub>2</sub>O<sub>4</sub>/GO/CS nanocomposite. The band gap of the nanocomposite was determined to be 3.5 eV, compared to 2.9 eV for CrFe<sub>2</sub>O<sub>4</sub> and 2.95 eV for CrFe<sub>2</sub>O<sub>4</sub>/GO. The photocatalytic performance was evaluated through the degradation of Reactive Red 198 (R198) and Brilliant Blue FCF 133 (B133) dyes under UV and sunlight irradiation. The CrFe<sub>2</sub>O<sub>4</sub>/GO/CS nanocomposite demonstrated superior dye removal efficiency compared to CrFe<sub>2</sub>O<sub>4</sub> and CrFe<sub>2</sub>O<sub>4</sub>/GO, achieving up to 98.2% removal for R198 at pH 8 and 98.5% for B133. The nanocomposite also showed excellent reusability, maintaining 81% removal efficiency for R198 and 77.6% for B133 after three cycles. Kinetic studies revealed that the dye removal process followed a pseudo-second-order model with R² values of 0.99 for both dyes. The nanocomposite demonstrated effective performance in real textile wastewater treatment, achieving 91.5% dye removal efficiency. The enhanced photocatalytic performance, coupled with the nanocomposite’s reusability, highlights its potential for practical applications in water purification and environmental remediation.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"794 - 813"},"PeriodicalIF":5.0000,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymers and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10924-024-03433-z","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
This study reports the hydrothermal synthesis and characterization of a chitosan-coated chromium ferrite/graphite oxide (CrFe2O4/GO/CS) nanocomposite with enhanced photocatalytic performance. The unique combination of the semiconductor properties of chromium ferrite, the light-harvesting capabilities of graphite oxide, and the stabilizing and adsorptive properties of chitosan resulted in a synergistic enhancement of the photocatalytic activity. The nanocomposite was characterized using FT-IR, Raman, XRD, zeta potential, DRS, BET, SEM, and EDS techniques. BET analysis revealed a specific surface area of 418.56 m²/g and a pore diameter of 2 nm for the CrFe2O4/GO/CS nanocomposite. The band gap of the nanocomposite was determined to be 3.5 eV, compared to 2.9 eV for CrFe2O4 and 2.95 eV for CrFe2O4/GO. The photocatalytic performance was evaluated through the degradation of Reactive Red 198 (R198) and Brilliant Blue FCF 133 (B133) dyes under UV and sunlight irradiation. The CrFe2O4/GO/CS nanocomposite demonstrated superior dye removal efficiency compared to CrFe2O4 and CrFe2O4/GO, achieving up to 98.2% removal for R198 at pH 8 and 98.5% for B133. The nanocomposite also showed excellent reusability, maintaining 81% removal efficiency for R198 and 77.6% for B133 after three cycles. Kinetic studies revealed that the dye removal process followed a pseudo-second-order model with R² values of 0.99 for both dyes. The nanocomposite demonstrated effective performance in real textile wastewater treatment, achieving 91.5% dye removal efficiency. The enhanced photocatalytic performance, coupled with the nanocomposite’s reusability, highlights its potential for practical applications in water purification and environmental remediation.
期刊介绍：
The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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