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- Perivoliotis, Dimitrios K., et al.
(författare)
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Recent progress on defect-rich electrocatalysts for hydrogen and oxygen evolution reactions
- 2023
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Ingår i: Nano Today. - : Elsevier. - 1748-0132 .- 1878-044X. ; 50
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Forskningsöversikt (refereegranskat)abstract
- To meet the demanding requirements for clean energy production, the need to develop advanced electrocatalysts for efficiently catalysing the water splitting reactions attracts a continuously increased attention. However, to meet the anticipated expansion in green hydrogen production from renewable energy sources, the catalysts used for the water splitting reaction not only need to satisfy the required figures of merit but should concurrently be based mainly on abundant, non-critical materials with low environmental impact. In last decades, non-noble metal catalysts, based on transition metals, rare-earth metals, dichalcogenides, and light elements such as phosphorus, nitrogen, and sulphur have shown improved performance. Moreover, in recent years increased interest has been focused on variations of such materials, more specifically on the introduction of defects to further boost their catalytic performance. Through the many studies performed over the last years, it is now possible to summarize, understand and describe the role of these defects for the water splitting reactions, namely the hydrogen and oxygen evolution reactions, and thereby to suggest strategies in the development of next generation electrocatalysts. This is the goal of the current review; we critically summarize the latest progress on the role of introduced defects for catalytic electrolysis applications by scrutinizing the structure–performance correlation as well as the specific catalytic activity. A broad class of nanomaterials is covered, comprising transition metal dichalcogenides, transition metal oxides and carbides, carbon-based materials as well as metal–organic frameworks (MOFs). Finally, the main challenges and future strategies and perspectives in this rapidly evolving field are provided at the end of the review.
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- Yang, Zhongwei, et al.
(författare)
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Application of bismuth sulfide based nanomaterials in cancer diagnosis and treatment
- 2023
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Ingår i: Nano Today. - : Elsevier BV. - 1878-044X .- 1748-0132. ; 49
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Forskningsöversikt (refereegranskat)abstract
- Cancer is still the leading disease threatening human life and health at present. With the development of nanotechnology, multifunctional nanomaterials integrated with different diagnostic and therapeutic functions have become the most active field in nano-research. Among them, Bi2S3-based nanomaterials have attracted great attention in the biomedical field due to their special photothermal effect and biocompatibility. In this review, we systematically summarize the synthetic strategies and their physical-chemical properties of Bi2S3-based nanomaterials. Then we outline the recent research progress in the diagnosis and treatment of cancer, which are highlighted and discussed in detail. In addition, the safety and biodistribution of Bi2S3-based nanomaterials are emphasized and discussed. It is believed that the emerging Bi2S3-based nanomaterials may realize the practical applications via unremitting efforts of scientific researchers in the near future.
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- Zhao, Yiming, et al.
(författare)
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Fabrication of lead telluride quantum dots and their application in photoelectrochemical-type photodetectors
- 2023
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Ingår i: Nano Today. - : ELSEVIER SCI LTD. - 1748-0132 .- 1878-044X. ; 52
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Tidskriftsartikel (refereegranskat)abstract
- IV-VI semiconductors have been extensively applied in photo-electrochemical (PEC)-type photodetectors. However, electrolytes with relatively high concentrations have been addressed which could induce electro-chemical reactions during the measurement and result in a performance decrement. In this work, lead telluride quantum dots (PbTe QDs) with uniform size distribution are fabricated for PEC-type photodetectors and their performance is systematically investigated in electrolytes with concentrations as low as 10-4 mol/L. As revealed, the PbTe QD-based photodetectors show apparent photo-response with excellent stability in 1000 cycles (decrement of 0.018 % per cycle). In addition, the as-fabricated photodetectors show a broadband response to light in a region of 350-700 nm. These results are well supported by density functional theory calculations based on structural features and electronic and optical properties. Hence, we envisage that this work paves the way to fabricate high-performance photodetectors in relatively low-concentration electrolytes, which also can extend their applications to other optoelectronic devices.
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