Xiqiang Mao, Jun Li, Lei Wu, Sujing Zou, Xue Lu, Shaoyi Li, Jian Yang, Ximei Fan
{"title":"银等离子体纳米粒子和氧空位共修饰TiO2纳米花用于增强太阳能驱动光催化水净化","authors":"Xiqiang Mao, Jun Li, Lei Wu, Sujing Zou, Xue Lu, Shaoyi Li, Jian Yang, Ximei Fan","doi":"10.1007/s11051-025-06418-8","DOIUrl":null,"url":null,"abstract":"<div><p>The water pollution caused by industrial wastewater is becoming increasingly serious, and efficient and sustainable remediation strategies need to be developed. This study improved the photocatalytic performance of TiO<sub>2</sub> through defect engineering and precious metal modification. Oxygen vacancies were introduced into TiO<sub>2</sub> nanoflowers through NaBH<sub>4</sub> reduction, leading to a decrease in the band gap of TiO<sub>2</sub> from 3.02 to 2.88 eV, thereby broadening its light absorption range. Additionally, the introduced oxygen vacancy defect states suppressed the recombination of electrons and holes. Subsequently, Ag nanoparticles were photo-deposited on the surface, synthesizing Ag/TiO<sub>2-x</sub> nanoflowers. The localized surface plasmon resonance (LSPR) effect of the Ag nanoparticles significantly enhanced the material’s visible-light absorption performance. Overall, due to the synergistic effect of oxygen vacancies and Ag nanoparticles, the photocatalytic degradation performance of Ag/TiO<sub>2-x</sub> nanoflowers in degrading RhB under simulated sunlight has been significantly enhanced compared to that of pure TiO<sub>2</sub> nanoflowers. The degradation rate of Rhodamine B (RhB) by optimized 1%-Ag/TiO<sub>2-x</sub> under simulated sunlight reached 84.7%, with a rate constant (<i>k</i> = 0.0287 min<sup>−1</sup>) 4.1 times higher than that of pristine TiO<sub>2</sub>. The possible mechanism for this enhancement in the photocatalytic activity of the Ag/TiO<sub>2-x</sub> is explained.</p></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"27 9","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ag plasmonic nanoparticles and oxygen vacancies co-modified TiO2 nanoflowers for enhanced solar-driven photocatalytic water purification\",\"authors\":\"Xiqiang Mao, Jun Li, Lei Wu, Sujing Zou, Xue Lu, Shaoyi Li, Jian Yang, Ximei Fan\",\"doi\":\"10.1007/s11051-025-06418-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The water pollution caused by industrial wastewater is becoming increasingly serious, and efficient and sustainable remediation strategies need to be developed. This study improved the photocatalytic performance of TiO<sub>2</sub> through defect engineering and precious metal modification. Oxygen vacancies were introduced into TiO<sub>2</sub> nanoflowers through NaBH<sub>4</sub> reduction, leading to a decrease in the band gap of TiO<sub>2</sub> from 3.02 to 2.88 eV, thereby broadening its light absorption range. Additionally, the introduced oxygen vacancy defect states suppressed the recombination of electrons and holes. Subsequently, Ag nanoparticles were photo-deposited on the surface, synthesizing Ag/TiO<sub>2-x</sub> nanoflowers. The localized surface plasmon resonance (LSPR) effect of the Ag nanoparticles significantly enhanced the material’s visible-light absorption performance. Overall, due to the synergistic effect of oxygen vacancies and Ag nanoparticles, the photocatalytic degradation performance of Ag/TiO<sub>2-x</sub> nanoflowers in degrading RhB under simulated sunlight has been significantly enhanced compared to that of pure TiO<sub>2</sub> nanoflowers. The degradation rate of Rhodamine B (RhB) by optimized 1%-Ag/TiO<sub>2-x</sub> under simulated sunlight reached 84.7%, with a rate constant (<i>k</i> = 0.0287 min<sup>−1</sup>) 4.1 times higher than that of pristine TiO<sub>2</sub>. The possible mechanism for this enhancement in the photocatalytic activity of the Ag/TiO<sub>2-x</sub> is explained.</p></div>\",\"PeriodicalId\":653,\"journal\":{\"name\":\"Journal of Nanoparticle Research\",\"volume\":\"27 9\",\"pages\":\"\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-08-26\",\"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/s11051-025-06418-8\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoparticle Research","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11051-025-06418-8","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}
Ag plasmonic nanoparticles and oxygen vacancies co-modified TiO2 nanoflowers for enhanced solar-driven photocatalytic water purification
The water pollution caused by industrial wastewater is becoming increasingly serious, and efficient and sustainable remediation strategies need to be developed. This study improved the photocatalytic performance of TiO2 through defect engineering and precious metal modification. Oxygen vacancies were introduced into TiO2 nanoflowers through NaBH4 reduction, leading to a decrease in the band gap of TiO2 from 3.02 to 2.88 eV, thereby broadening its light absorption range. Additionally, the introduced oxygen vacancy defect states suppressed the recombination of electrons and holes. Subsequently, Ag nanoparticles were photo-deposited on the surface, synthesizing Ag/TiO2-x nanoflowers. The localized surface plasmon resonance (LSPR) effect of the Ag nanoparticles significantly enhanced the material’s visible-light absorption performance. Overall, due to the synergistic effect of oxygen vacancies and Ag nanoparticles, the photocatalytic degradation performance of Ag/TiO2-x nanoflowers in degrading RhB under simulated sunlight has been significantly enhanced compared to that of pure TiO2 nanoflowers. The degradation rate of Rhodamine B (RhB) by optimized 1%-Ag/TiO2-x under simulated sunlight reached 84.7%, with a rate constant (k = 0.0287 min−1) 4.1 times higher than that of pristine TiO2. The possible mechanism for this enhancement in the photocatalytic activity of the Ag/TiO2-x is explained.
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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