A Generalizable Top-Down Nanostructuring Method of Bulk Oxides: Sequential Oxygen-Nitrogen Exchange Reaction
| Autor: | Su-Young Han, Byungwuk Kang, Moo Dong Lee, Lanlee Lee, Hee-eun Kim, Jin Ho Bang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Ion exchange chemistry.chemical_element 02 engineering and technology General Chemistry Thermal treatment Nitride 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nitrogen Oxygen 0104 chemical sciences Biomaterials Nanopore Grain growth chemistry Chemical engineering Transition metal General Materials Science 0210 nano-technology Biotechnology |
| Zdroj: | Small. 14:1801124 |
| ISSN: | 1613-6810 |
| DOI: | 10.1002/smll.201801124 |
| Popis: | A thermal reaction route that induces grain fracture instead of grain growth is devised and developed as a top-down approach to prepare nanostructured oxides from bulk solids. This novel synthesis approach, referred to as the sequential oxygen-nitrogen exchange (SONE) reaction, exploits the reversible anion exchange between oxygen and nitrogen in oxides that is driven by a simple two-step thermal treatment in ammonia and air. Internal stress developed by significant structural rearrangement via the formation of (oxy)nitride and the creation of oxygen vacancies and their subsequent combination into nanopores transforms bulk solid oxides into nanostructured oxides. The SONE reaction can be applicable to most transition metal oxides, and when utilized in a lithium-ion battery, the produced nanostructured materials are superior to their bulk counterparts and even comparable to those produced by conventional bottom-up approaches. Given its simplicity and scalability, this synthesis method could open a new avenue to the development of high-performance nanostructured electrode materials that can meet the industrial demand of cost-effectiveness for mass production. |
| Databáze: | OpenAIRE |
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