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- 저자 : Yihan Zhang (검색결과 6 건)
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Shi Yihan,Zhang Ming,Zhao Junshan,Zhang Liu,Cui Xumei,Zhu Xinhua,Jin Dandan,Gong Jiali,Yang Dingyu,Li Jitao 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.5
This work used a simple electrochemical reduction method to secondary construct the reduced nickel base (rNi Base) on nickel foam with a nano-core structure. The secondarily constructed base has a large specific surface area, which can increase the mass utilization of the active material. The rNi Base was used as a base for the reduction of nickel on Na+, K+, and NH+4, respectively. MnO2 was electrodeposited under three different cation pre-intercalation treatments, and the mechanism of the effect of different monovalent cations to guide the growth of MnO2 materials was investigated. Finally, rNi/MnO2&Na+ electrode with a special nano cauliflower structure was obtained. The special nanostructure of the electrode enhances its electrochemical performance, possessing 598 F g− 1 ultra-high specific capacitance at a current density of 1 A g− 1 and a high specific capacitance of 307.5 F g− 1 at a high current density of 20 A g− 1, and high specific capacitance maintenance rate of 92.7% after 500 cycles of charging and discharging at a current density of 2 A g− 1. In addition, the symmetrical supercapacitor assembled with this electrode has a very high specific capacitance (401.1 F g− 1 at a current density of 1 A g− 1) and energy density (80.22Wh kg− 1 at a power density of 599.99 W kg− 1).
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Xiaozhen Zhang,Yuhua Jiang,Xuebing Hu,Liangliang Sun,Yihan Ling 대한금속·재료학회 2018 ELECTRONIC MATERIALS LETTERS Vol.14 No.2
Proton-conducting solid oxide fuel cell (H-SOFC) based on layered perovskite type GdBaCuCoO5+x (GBCC) cathodewas fabricated with in situ drop-coating BaZr0.1Ce0.7Y0.2O3−δ (BZCY) electrolyte membrane. The influences of Cu dopinginto Co sites of GdBaCo2O5+x on the electrical conductivity and conduction mechanism, thermal expansion propertyand electrochemical performance of cathode materials and corresponding single cell were investigated. Results show thatthe electrical conductivity decreased and the conduction mechanism would gradually transform to the semiconductor-likebehavior. A high maximum power density of 480 mW cm−2 was obtained for the anode supported NiO–BZCY/NiO–BZCY/BZCY/GBCC single cells with wet H2fuel at 700 °C. The corresponding polarization resistance was as low as 0.17 Ω cm2. The excellent electrochemical performance of as-prepared single cell indicates that GBCC is a good candidate of cathodematerials for H-SOFCs.
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Kequan Zhang,Qian Fang,Yihan Xie,Yujia Chen,Tong Wei,Yanyu Xiao 대한환경공학회 2022 Environmental Engineering Research Vol.27 No.6
Polyhydroxyalkanoate (PHA) is a new type of bio-polyester which is expected to replace traditional petroleum-based plastics. The experiment was carried out based on anaerobic-microaerobic process. Firstly, the PHA accumulation capacity of activated sludge under different pH conditions was discussed, and then the batch test of nitrogen and phosphorus limitation was carried out under the condition of optimal pH. Moreover, the content of PHA monomer under nutrient restriction was also studied. The experimental results showed that when pH was not controlled (7.5~8.5), C:N and C:P weight ratio was equal to 150, the maximum content of PHA accounted for 50.39% and 36.07% of the dry cell weight, respectively. Besides, it was found that increasing the C:N weight ratio was beneficial to increasing the proportion of polyhydroxyvalerate (PHV) monomer in PHA.
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Why does SLIPS inhibit P.aeruginosa initial adhesion in static condition?
Yuanyuan Shen,Yihan Sun,Peng Wang,Dun Zhang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
Slippery liquid-infused porous surfaces (SLIPSs) have distinguished themselves in inhibiting bacteriaattachment and biofilm development in static conditions. However, underlying antifouling mechanisms,especially from gene level in bioinformatics, is still lacking. In this work, we investigated the initialattachment difference of Pseudomonas aeruginosa PAO1 on polydimethylsiloxane (PDMS) surface andthe infused silicone slippery surface (i-PDMS). RNA sequencing (RNA-seq) was used to investigate the differencesin the expression of PAO1 gene on elastomer surface during initial adhesion before and after oilinjection. Compared with PDMS, bacterial attachment on i-PDMS was remarkably decreased 98.0 ± 0.7 %within 10 mins. And the antifouling ability of i-PDMS significantly outperformed PDMS throughout theentire culture period of PAO1 (14 days) in static conditions. RNA-seq reveals that the down-regulatedPA1382 of PAO1 in bulk near the i-PDMS surfaces may inhibit bacterial initial adhesion. PA1382 geneencodes type II secretion outer membranes (OM) secretin, also known as type II secretion system(T2SS) protein GspD, which is involved in regulating the opening or closing of exoprotein channels, influencingbacterial adhesion and biofilm formation by controlling the secretion of toxins or effectors. Ourfindings provide a deeper understanding of the mechanism by which SLIPS inhibits initial bacterialadhesion.
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Wang Yanzong,Ma Yihan,Zhang Qinfang,Huang Rui,Gao Benling,Li Zhongwen,Li Guannan,Liang Feng 한국물리학회 2022 Current Applied Physics Vol.41 No.-
The electrochemical performances of the V2CSe2 MXene as anode materials for Na, K, Mg, Ca, and Al-ion batteries have been systematically investigated by the first-principles method. The adsorption energies of metal atoms show that Na, K, and Ca atoms can effectively adsorb on the V2CSe2, except for Mg and Al atoms. The large diffusion constants for Na, K, and Ca atoms calculated by the diffusion energy barriers (0.098 eV for Na, 0.066 eV for Ca, and 0.24 eV for Ca) indicate the high mobility on the V2CSe2 surface. Significantly, the maximum theoretical capacities of V2CSe2 reach up to 394.12 mA h/g for Na and Ca ions. Furthermore, the low average open-circuit voltage (OCV) (0.150 V for Na, 0.175 V for K, and 0.072 V for Ca) indicates the V2CSe2 is a suitable anode material. These results provide fundamental guidance for the V2CSe2 monolayer as anode materials of non-lithium metal-ion batteries.
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Xinyang Wu,Shuting Chen,Zixin Zhang,Yihan Zhang,Pingmei Li,Xinyi Chen,Miaomiao Liu,Qian Lu,Zhongyi Li,Zhongyan Wei,Pei Xu 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.5
Cowpea mild mottle virus (CPMMV) is a global plant virus that poses a threat to the production and quality of legume crops. Early and accurate diagnosis is essential for effective managing CPMMV outbreaks. With the advancement in isothermal recombinase polymerase amplification and lateral flow strips technologies, more rapid and sensitive methods have become available for detecting this pathogen. In this study, we have developed a reverse transcription recombinase polymerase amplification combined with lateral flow strips (RT-RPA-LFS) method for the detection of CPMMV, specifically targeting the CPMMV coat protein (CP) gene. The RT-RPA-LFS assay only requires 20 min at 40°C and demonstrates high specificity. Its detection limit was 10 copies/μl, which is approximately up to 100 times more sensitive than RT-PCR on agarose gel electrophoresis. The developed RT-RPA-LFS method offers a rapid, convenient, and sensitive approach for field detection of CPMMV, which contribute to controlling the spread of the virus.
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