Yating Liu, Xiaodan Zhao, Tianyu Hu, Yingru Sun, Siyu Li, Siqi Ding, Yan Yu, Li Li
{"title":"贵金属铂和 Zn0.25Cd0.75S QDs 对氧化锌的协同效应：宽光谱响应及其出色的光催化性能","authors":"Yating Liu, Xiaodan Zhao, Tianyu Hu, Yingru Sun, Siyu Li, Siqi Ding, Yan Yu, Li Li","doi":"10.1007/s11051-024-06067-3","DOIUrl":null,"url":null,"abstract":"<div><p>Constructing heterostructures can accelerate the separation of electrons and holes, prolong the lifetime of photogenerated charge carriers, and have an important impact on improving photocatalytic activity. The Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO heterostructure was constructed by the hydrothermal method, which was further modified by Pt through the photo-deposition process, and then Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO composites with broad spectral response were finally synthesized. The composites are mainly composed of nanoparticle agglomerates, in which the solid solution Zn<sub>0.25</sub>Cd<sub>0.75</sub>S mainly exists in the form of quantum dots (QDs), while Pt with surface plasmon resonance (SPR) effect exists in elemental form. Compared with ZnO, the specific surface area of the nanoparticle framework has a significant enhancement, thus increasing the active sites for the photocatalytic reaction. In addition, the results of the transient photocurrent response tests and the electrochemical impedance tests show that Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO composite has a better carrier separation efficiency with the fastest electron transfer rate and the lowest charge transfer resistance compared with other reference systems. Furthermore, the composite exhibits excellent photocatalytic performance in the multi-mode photocatalytic degradation of dye molecules. The results of photocatalytic water splitting into hydrogen show that the hydrogen production capacity of the Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO composite is 33.67 mmol·g<sup>−1</sup> in 8 h, which is 207 times higher than that of commercially available P25. Combined with the results of the capture experiments, it is finally determined that the possible photocatalytic mechanism of Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO is more inclined to be the effect of the “Z-type” energy band structure theory based on Pt as the electronic transducer between ZnO and Zn<sub>0.25</sub>Cd<sub>0.75</sub>S.</p></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synergistic effect of noble metal Pt and Zn0.25Cd0.75S QDs on ZnO: broad spectral response and its outstanding photocatalytic performance\",\"authors\":\"Yating Liu, Xiaodan Zhao, Tianyu Hu, Yingru Sun, Siyu Li, Siqi Ding, Yan Yu, Li Li\",\"doi\":\"10.1007/s11051-024-06067-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Constructing heterostructures can accelerate the separation of electrons and holes, prolong the lifetime of photogenerated charge carriers, and have an important impact on improving photocatalytic activity. The Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO heterostructure was constructed by the hydrothermal method, which was further modified by Pt through the photo-deposition process, and then Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO composites with broad spectral response were finally synthesized. The composites are mainly composed of nanoparticle agglomerates, in which the solid solution Zn<sub>0.25</sub>Cd<sub>0.75</sub>S mainly exists in the form of quantum dots (QDs), while Pt with surface plasmon resonance (SPR) effect exists in elemental form. Compared with ZnO, the specific surface area of the nanoparticle framework has a significant enhancement, thus increasing the active sites for the photocatalytic reaction. In addition, the results of the transient photocurrent response tests and the electrochemical impedance tests show that Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO composite has a better carrier separation efficiency with the fastest electron transfer rate and the lowest charge transfer resistance compared with other reference systems. Furthermore, the composite exhibits excellent photocatalytic performance in the multi-mode photocatalytic degradation of dye molecules. The results of photocatalytic water splitting into hydrogen show that the hydrogen production capacity of the Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO composite is 33.67 mmol·g<sup>−1</sup> in 8 h, which is 207 times higher than that of commercially available P25. Combined with the results of the capture experiments, it is finally determined that the possible photocatalytic mechanism of Pt/Zn<sub>0.25</sub>Cd<sub>0.75</sub>S QDs/ZnO is more inclined to be the effect of the “Z-type” energy band structure theory based on Pt as the electronic transducer between ZnO and Zn<sub>0.25</sub>Cd<sub>0.75</sub>S.</p></div>\",\"PeriodicalId\":653,\"journal\":{\"name\":\"Journal of Nanoparticle Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-07-09\",\"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/s11051-024-06067-3\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoparticle Research","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11051-024-06067-3","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}
Synergistic effect of noble metal Pt and Zn0.25Cd0.75S QDs on ZnO: broad spectral response and its outstanding photocatalytic performance
Constructing heterostructures can accelerate the separation of electrons and holes, prolong the lifetime of photogenerated charge carriers, and have an important impact on improving photocatalytic activity. The Zn0.25Cd0.75S QDs/ZnO heterostructure was constructed by the hydrothermal method, which was further modified by Pt through the photo-deposition process, and then Pt/Zn0.25Cd0.75S QDs/ZnO composites with broad spectral response were finally synthesized. The composites are mainly composed of nanoparticle agglomerates, in which the solid solution Zn0.25Cd0.75S mainly exists in the form of quantum dots (QDs), while Pt with surface plasmon resonance (SPR) effect exists in elemental form. Compared with ZnO, the specific surface area of the nanoparticle framework has a significant enhancement, thus increasing the active sites for the photocatalytic reaction. In addition, the results of the transient photocurrent response tests and the electrochemical impedance tests show that Pt/Zn0.25Cd0.75S QDs/ZnO composite has a better carrier separation efficiency with the fastest electron transfer rate and the lowest charge transfer resistance compared with other reference systems. Furthermore, the composite exhibits excellent photocatalytic performance in the multi-mode photocatalytic degradation of dye molecules. The results of photocatalytic water splitting into hydrogen show that the hydrogen production capacity of the Pt/Zn0.25Cd0.75S QDs/ZnO composite is 33.67 mmol·g−1 in 8 h, which is 207 times higher than that of commercially available P25. Combined with the results of the capture experiments, it is finally determined that the possible photocatalytic mechanism of Pt/Zn0.25Cd0.75S QDs/ZnO is more inclined to be the effect of the “Z-type” energy band structure theory based on Pt as the electronic transducer between ZnO and Zn0.25Cd0.75S.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
