期刊
CHEMICAL ENGINEERING JOURNAL
卷 420, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127584
关键词
Garlic husk; 2D-crumpled porous carbon; Fe3O4; Fe3O4 NAs@2D-CCS; Supercapacitor
资金
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2017R1C1B5076834, NR-F2020R1C1C1012655]
- National Research Foundation of Korea [4120200213748] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study presents a unique method to convert agm bio-waste into an economical wealth material by synthesizing Fe3O4 NAs@2D-CCS composite nano-assemblies using garlic husk as a starting material. The resulting composite exhibits high specific capacitance and outstanding power and energy density, showing great potential for energy, catalysis, and environmental applications.
Due to the copious development of industries and depletion of fossil fuels generate deteriorating environmental pollution and appalling economic crisis. Thus, there are increasing unmet for developing well-defined nanostructures to mitigate energy and environmental issues. Herein, we firstly report a unique concerted method to convert agm bio-waste into an economical wealth material. By the inspiration of nature, we selected a waste 2D garlic husk (Allium sativum) as a torchbearer to make a unique material. The garlic extract was applied for the synthesis of Fe3O4 NAs@2D-CCS composite nano-assemblies (NAs). Interestingly, the small-sized Fe3O4 nanocrystals (<20 nm) underwent nucleation in the presence of biogenic 2D-CCS and formed a pomegranate like a cluster (200 nm) forming a conglomerate on porous carbon layers. Most importantly, no secondary waste was generated in this work. This Fe3O4 NAs@2D-CCS composite affords high specific capacitance of 820F g(-1) at a current density of 0.5 A g(-1), which is nearly 5 to 3 times higher than pristine Fe(3)O(4 )NPs (<20 nm) electrode with an outstanding power density (3500-8000 W kg(-1)) and specific energy density (115.5 to 65.9 Wh Kg(-1)), which is superior among most of all reported iron oxide and graphitic carbon composites. This simple work stimulates a new door for the generation of waste to well-defined nanostructure materials for energy, catalysis, and environmental applications.
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