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- 저자 : Huihan Liu (검색결과 2 건)
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Huihan Xi,Yunhong Liu,Linge Guo,Runrun Hu 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.1
The experiments of contact ultrasound-assisted far-infrared radiation (FIR) drying on potato slices were conducted to investigate the effects of ultrasonic power on drying characteristics and quality properties. The results showed that contact ultrasound was helpful for accelerating mass transfer of the samples, and the improvement of ultrasonic power could significantly shorten drying time. The ultrasonic reinforcement effect on drying rate declined along with the decrease in moisture content. Deff values were within 1.15 9 10-10 and 1.96 9 10-10 m2/s, and improved with an increase in ultrasound power. Compared with FIR dried ones, more and larger pore size of microcapillaries in the samples’ tissue structure could be observed with contact ultrasound application, and higher ultrasonic power produced more microtunnels. Contact ultrasound in FIR drying could reduce the color difference of dried potato slices, and decrease the hardness and brittleness values. Higher TPC and TFC could be achieved as ultrasonic power increased.
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High-Performance Supercapacitor based on the NaOH Activated D-Glucose Derived Carbon
Chao Wu,Jiang Xu,Jianning Ding,Ningyi Yuan,Pengtao Yan,Ruijun Zhang,Huihan Liu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.7
In this work, a mechanism of catalytic graphitization of D-glucose derived carbon during NaOH activation process is disclosed. The catalytic graphitization is caused by sodium atom, which is produced in the reaction between NaOH and carbon. Due to the combined action of activation and catalytic graphitization resulting from the NaOH, the activated D-glucose derived carbon behaves as a hierarchical micro- and meso-porous structure and has high electrical conductivity. Electrochemical investigations demonstrate that the activated sample exhibits an outstanding rate capability (70% of capacity retention even at a scan rate of 2 V s-1) and high specific capacitance (106 F g-1) in 6 M KOH aqueous electrolyte, which makes it a promising electrode material for high-power supercapacitors.
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