Comparative study of in situ and ex situ incorporation of carbon quantum dots into cellulose acetate nanofibers: effects on pollutant dye removal

IF 2.6 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Nanoparticle Research Pub Date : 2025-09-22 DOI:10.1007/s11051-025-06447-3

Marcos Alan Cota Leal, Andrés Gabriel Hernández-Vázquez, Ricardo Valdez Castro, Amelia Olivas Sarabia

{"title":"Comparative study of in situ and ex situ incorporation of carbon quantum dots into cellulose acetate nanofibers: effects on pollutant dye removal","authors":"Marcos Alan Cota Leal, Andrés Gabriel Hernández-Vázquez, Ricardo Valdez Castro, Amelia Olivas Sarabia","doi":"10.1007/s11051-025-06447-3","DOIUrl":null,"url":null,"abstract":"<div><p>This study investigates the synthesis and characterization of cellulose acetate (CA) nanofiber composites incorporating carbon quantum dots (CQDs) for photocatalytic applications. The CQDs were synthesized via an electrochemical carbonization process using a two-electrode system and were integrated into CA nanofibers using both in situ and ex situ methods. The chemical composition was analyzed by Fourier-transform infrared spectroscopy (FTIR), confirming the successful incorporation of CQDs into the nanofibers. The optical properties of the CQDs embedded in the nanofibers were assessed via UV–Vis spectroscopy, and the morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM images revealed uniform, smooth nanofibers, and TEM analysis showed a better dispersion of CQDs in the in situ nanofibers compared to ex situ samples. The photocatalytic degradation of methylene blue dye under UV light was used to evaluate the photocatalytic efficiency of the materials. The results indicated that the in situ CQDs/CA nanofibers exhibited superior photocatalytic activity, with a significant increase in the degradation rate compared to the nanofibers by the ex situ process. These findings suggest that the incorporation method of CQDs plays a crucial role in enhancing the photocatalytic performance of the nanofibers.</p></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"27 10","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11051-025-06447-3.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoparticle Research","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11051-025-06447-3","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

This study investigates the synthesis and characterization of cellulose acetate (CA) nanofiber composites incorporating carbon quantum dots (CQDs) for photocatalytic applications. The CQDs were synthesized via an electrochemical carbonization process using a two-electrode system and were integrated into CA nanofibers using both in situ and ex situ methods. The chemical composition was analyzed by Fourier-transform infrared spectroscopy (FTIR), confirming the successful incorporation of CQDs into the nanofibers. The optical properties of the CQDs embedded in the nanofibers were assessed via UV–Vis spectroscopy, and the morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM images revealed uniform, smooth nanofibers, and TEM analysis showed a better dispersion of CQDs in the in situ nanofibers compared to ex situ samples. The photocatalytic degradation of methylene blue dye under UV light was used to evaluate the photocatalytic efficiency of the materials. The results indicated that the in situ CQDs/CA nanofibers exhibited superior photocatalytic activity, with a significant increase in the degradation rate compared to the nanofibers by the ex situ process. These findings suggest that the incorporation method of CQDs plays a crucial role in enhancing the photocatalytic performance of the nanofibers.

查看原文本刊更多论文

碳量子点原位与非原位掺入醋酸纤维素纳米纤维的对比研究：对污染物染料去除的影响

本研究研究了含碳量子点（CQDs）光催化应用的醋酸纤维素（CA）纳米纤维复合材料的合成和表征。利用双电极系统通过电化学碳化工艺合成了CQDs，并通过原位和非原位方法将其集成到CA纳米纤维中。利用傅里叶红外光谱（FTIR）分析了化学成分，证实了CQDs成功掺入到纳米纤维中。利用紫外可见光谱分析了包埋在纳米纤维中的CQDs的光学性质，并用扫描电镜（SEM）和透射电镜（TEM）对其形貌进行了表征。SEM图像显示出均匀、光滑的纳米纤维，TEM分析表明原位纳米纤维中CQDs的分散性比非原位样品好。通过紫外光催化降解亚甲基蓝染料的实验，评价了材料的光催化效率。结果表明，原位CQDs/CA纳米纤维具有优异的光催化活性，其降解速率显著高于非原位CQDs/CA纳米纤维。这些结果表明，CQDs的掺入方式对提高纳米纤维的光催化性能起着至关重要的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

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.