{"title":"Enhanced photocatalytic degradation efficiency for TiO2-carbon dots composite catalyst prepared via calcination-hydrothermal sequential treatment","authors":"Yungang Yuan, Zhuang Xiang, Yongjian Tong, Zhili Peng","doi":"10.1007/s11051-025-06325-y","DOIUrl":null,"url":null,"abstract":"<div><p>Carbon dots (CDs) exhibit great potential in modifying TiO<sub>2</sub> to enhance its photocatalytic capacities. However, the influence of different compositing approaches on the TiO<sub>2</sub>/CDs photocatalytic performance has not been carefully studied. In this study, CDs-modified TiO<sub>2</sub> photocatalysts were prepared via hydrothermal treatment, direct calcination, and calcination-hydrothermal sequential treatment, respectively. Careful study revealed that the third catalyst demonstrated the most enhanced photocatalytic performance because in this synthesis approach; CDs not only improved the light absorption capacity of TiO<sub>2</sub> and increased the lifetime of charge carriers, but also enlarged the specific surface area of TiO<sub>2</sub>. With further optimization in CDs mass ratios, the degradation efficiencies of MB and RhB by the optimum catalyst were increased by 18% and 21%, respectively, from that of the pristine TiO<sub>2</sub>, highlighting the great potential of CDs as modification agents to enhance the photocatalytic performance of traditional photocatalysts.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"27 5","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-04-30","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/s11051-025-06325-y","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
Carbon dots (CDs) exhibit great potential in modifying TiO2 to enhance its photocatalytic capacities. However, the influence of different compositing approaches on the TiO2/CDs photocatalytic performance has not been carefully studied. In this study, CDs-modified TiO2 photocatalysts were prepared via hydrothermal treatment, direct calcination, and calcination-hydrothermal sequential treatment, respectively. Careful study revealed that the third catalyst demonstrated the most enhanced photocatalytic performance because in this synthesis approach; CDs not only improved the light absorption capacity of TiO2 and increased the lifetime of charge carriers, but also enlarged the specific surface area of TiO2. With further optimization in CDs mass ratios, the degradation efficiencies of MB and RhB by the optimum catalyst were increased by 18% and 21%, respectively, from that of the pristine TiO2, highlighting the great potential of CDs as modification agents to enhance the photocatalytic performance of traditional photocatalysts.
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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