{"title":"Efficient photocatalytic degradation of crystal violet using quaternized reduced graphene oxide nanocomposite","authors":"","doi":"10.1016/j.diamond.2024.111592","DOIUrl":null,"url":null,"abstract":"<div><p>The discharge of dyes into water resources is an alarming issue that poses a threat to the environment. This study aims to synthesize nanocatalysts, i.e., BiO<sub>2-x</sub>/rGO-CNT/ZnO nanocomposite, for efficient photocatalytic degradation of crystal violet dye. The nanocomposites were analyzed utilizing XRD, Raman spectroscopy techniques, FTIR, XPS, FESEM, EDAX, TEM, HRTEM, and UV–vis spectra. The band edge position of the nanoparticles was confirmed from the UV–vis spectrum, indicating significant absorption in the expanded visible-light region. The BiO<sub>2-x</sub>/rGO-CNT/ZnO nanocomposite showed enhanced photocatalytic efficiency in comparison with BiO<sub>2-x</sub>/rGO-CNT nanocomposite by degrading 92.39 % of crystal violet dye in 5 h under visible light. The kinetic investigation of photocatalytic degradation for BiO<sub>2-x</sub>/rGO-CNT and BiO<sub>2-x</sub>/rGO-CNT/ZnO nanocomposite followed pseudo-first-order rate kinetics with rate constants of 0.040 h<sup>−1</sup> and 0.048 h<sup>−1</sup> was obtained for optimum pH 12. The enhanced degradation characteristics of BiO<sub>2-x</sub>/rGO-CNT/ZnO nanocomposite, make it a suitable alternative for wastewater treatment.</p></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diamond and Related Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925963524008057","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
引用次数: 0
Abstract
The discharge of dyes into water resources is an alarming issue that poses a threat to the environment. This study aims to synthesize nanocatalysts, i.e., BiO2-x/rGO-CNT/ZnO nanocomposite, for efficient photocatalytic degradation of crystal violet dye. The nanocomposites were analyzed utilizing XRD, Raman spectroscopy techniques, FTIR, XPS, FESEM, EDAX, TEM, HRTEM, and UV–vis spectra. The band edge position of the nanoparticles was confirmed from the UV–vis spectrum, indicating significant absorption in the expanded visible-light region. The BiO2-x/rGO-CNT/ZnO nanocomposite showed enhanced photocatalytic efficiency in comparison with BiO2-x/rGO-CNT nanocomposite by degrading 92.39 % of crystal violet dye in 5 h under visible light. The kinetic investigation of photocatalytic degradation for BiO2-x/rGO-CNT and BiO2-x/rGO-CNT/ZnO nanocomposite followed pseudo-first-order rate kinetics with rate constants of 0.040 h−1 and 0.048 h−1 was obtained for optimum pH 12. The enhanced degradation characteristics of BiO2-x/rGO-CNT/ZnO nanocomposite, make it a suitable alternative for wastewater treatment.
期刊介绍:
DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices.
The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.