作者机构：
[Chen, Xiaohua; Xu, Yali; Tang, Qunli; Li, Weize; Hu, Aiping; Li, Yanhua; Zhang, Yan; Fan, Binbin; Liu, Jilei] Hunan Univ, Coll Mat Sci & Engn, Hunan Prov Key Lab Adv Carbon Mat & Appl Technol, Changsha 410082, Hunan, Peoples R China.;[Yan, Jiaxu] Nanjing Tech Univ Nanjing Tech, Key Lab Flexible Elect KLOFE, Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM, 30 South Puzhu Rd, Nanjing 211816, Peoples R China.;[Yan, Jiaxu] Nanjing Tech Univ Nanjing Tech, Inst Adv Mat IAM, Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM, 30 South Puzhu Rd, Nanjing 211816, Peoples R China.;[Liu, Zheng] Hunan City Univ, Coll Mat & Chem Engn, All Solid State Energy Storage Mat & Devices Key, Yiyang 413000, Peoples R China.
通讯机构：
[Chen, XH; Liu, JL] H;Hunan Univ, Coll Mat Sci & Engn, Hunan Prov Key Lab Adv Carbon Mat & Appl Technol, Changsha 410082, Hunan, Peoples R China.
摘要：
Potassium ion hybrid capacitors (PIHCs) have drawn considerable attention due to the fact that they can combine the merits of high energy density of potassium ion batteries (KIBs) and high power density of supercapacitors. However, the sluggish kinetics caused by the large radius of K+ largely hinder the practical application of PIHCs. In this work, we report a nitrogen and sulfur co-doped 3D hierarchical porous carbon (N, S-3DHPC-600) as an anode for KIBs, possessing boosted potassium storage performance in terms of high reversible capacity, superior durability and rate capability. This N, S-3DHPC-600 electrode provides a large surface area, highly interconnected micro/mesoporosity, high ratio of pyridinic N/pyrrolic N and enlarged interlayer distance, which could promote the fast intercalation/deintercalation of K+, improve the surface charge capacity and maintain the structural stability of electrode material. As expected, a PIHCs device is constructed by employing this N, S-3DHPC-600 as an anode and AC-800 as a cathode, delivering exceptionally high energy/power densities (130.6 Wh Kg(-1)/16800W Kg(-1)), as well as a long cycle life (86.8% capacity retention after 5000cycles). (C) 2020 Published by Elsevier Ltd.
作者：
You Yi-lan;Liu Chen-ming;Li Du-xin*;Liu Shi-jun;He Guo-wen
期刊：
中南大学学报(英文版),2019年26(1):88-97 ISSN：2095-2899
通讯作者：
Li Du-xin
作者机构：
[Liu Shi-jun; You Yi-lan] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[He Guo-wen; Liu Chen-ming; You Yi-lan] Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Peoples R China.;[Li Du-xin] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Li Du-xin] C;Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
摘要：
A series of wear and flame resistant polyamide 6 (PA6) composites were prepared using glass fiber (GF) and talc (T) as reinforcer, polytetrafluoroethylene (PTFE) and graphite (Gr) as solid lubricants, red phosphorus (RP) and zinc borate (ZB) as flame retardant. The tribological property, mechanical property, flame retardant property and the flame retardant mechanism were investigated. The tests show that the formula of the wear resistant PA6 composite (WRPA 6) is PA6/GF/T/PTFE/Gr in the ratio of 100/15/5/10/5 by mass. Because this composite exhibits the lowest friction coefficient (0.1429) and no wear mass loss, the introduction of RP and ZB can increase the flame resistance of WRPA6, and the synergistic effect of RP and ZB is obtained. Detailedly, the composite with 4 parts of ZB and 12 parts of RP shows the best flame retardant property, achieving the highest limiting oxygen index (LOI) (30.2 vol%) and a UL94 V-0 rating, and the flame retardant mechanisms may be gas phase along with condense phase mechanism.
作者：
Wang Zhen-Rui;Qi Feng-Pei*;Luo Miao;Cao Yi-Ming;Liu Hong-Tao;...
期刊：
分析化学,2019年47(1):112-118 ISSN：0253-3820
通讯作者：
Qi Feng-Pei;Liu Chang-Hui
作者机构：
[Qi Feng-Pei; Liu Chang-Hui; Su Jian-Ke; Long Li-Ping; Cao Yi-Ming; Luo Miao; Zhang Chang-Qing; Wang Zhen-Rui; Liu Hong-Tao; Qi, FP; Liu, CH] Hunan City Univ, Coll Mat & Chem Engn, Hunan Prov Key Lab Dark Tea & Jin Hua, Yiyang 413000, Peoples R China.;[Liu Chang-Hui] Hunan Univ, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Qi, FP; Liu, CH; Liu Chang-Hui] H;Hunan City Univ, Coll Mat & Chem Engn, Hunan Prov Key Lab Dark Tea & Jin Hua, Yiyang 413000, Peoples R China.;Hunan Univ, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
作者机构：
[Guo, Qianqiong; Zhong, Tongsheng; Liu, Rong; Yin, Zhifang; Huang, Shasheng; Zhu, Xiaoyan] Hunan City Univ, Coll Mat & Chem Engn, Huanan Prov Key Lab Dark Tea & Jin Hua, Yiyang 413000, Peoples R China.;[Liu, Aijuan] Beijing Univ Chinese Med, Sch Humanities, Beijing 10029, Peoples R China.
通讯机构：
[Zhong, Tongsheng] H;Hunan City Univ, Coll Mat & Chem Engn, Huanan Prov Key Lab Dark Tea & Jin Hua, Yiyang 413000, Peoples R China.
摘要：
In the communication, by virtue of the excellent conductivity and great surface area of mesoporous carbon (FDU-15), the enhanced conductivity of Au NPs, and the good electrochemical response of polyphenol oxidase (PPO) to rutin, a PPO/AuNPs/FDU-15-modified electrode was used as a candidate for the determination of rutin in dark teas with satisfactory results.
摘要：
Artemisia selengenesis is not only a health food, but also a well-known traditional Chinese medicine. Only a fraction of the chloroplast (cp) genome data of Artemisia has been reported and chloroplast genomic materials have been widely used in genomic evolution studies, molecular marker development, and phylogenetic analysis of the genus Artemisia, which makes evolutionary studies, genetic improvement, and phylogenetic identification very difficult. In this study, the complete chloroplast genome of A. selengensis was compared with that of other species within Artemisia and phylogenetic analyses was conducted with other genera in the Asteraceae family. The results showed that A. selengensis is an AT-rich species and has a typical quadripartite structure that is 151,215 bp in length. Comparative genome analyses demonstrated that the available chloroplast genomes of species of Artemisia were well conserved in terms of genomic length, GC contents, and gene organization and order. However, some differences, which may indicate evolutionary events, were found, such as a re-inversion event within the Artemisia genus, an unequal duplicate phenomenon of the ycf1 gene because of the expansion and contraction of the IR region, and the fast-evolving regions. Repeated sequences analysis showed that Artemisia chloroplast genomes presented a highly similar pattern of SSR or LDR distribution. A total of 257 SSRs and 42 LDRs were identified in the A. selengensis chloroplast genome. The phylogenetic analysis showed that A. selengensis was sister to A. gmelinii. The findings of this study will be valuable in further studies to understand the genetic diversity and evolutionary history of Asteraceae.
作者机构：
[Liu, Saiwen; Zhang, Jin; Liu, SW; Zhang, J] Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Peoples R China.;[Chen, Ru] Yiyang Agr Prod Qual Detect Ctr, Yiyang 413000, Peoples R China.
通讯机构：
[Liu, SW; Zhang, J] H;Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Peoples R China.
关键词：
additive-free;copper;redox
摘要：
A simple copper-catalyzed redox coupling of sodium sulfinates and nitroarenes is described. In this process, abundant and stable nitroarenes serve as both the nitrogen sources and oxidants, and sodium sulfinates act as both reactants and reductants. A variety of aromatic sulfonamides were obtained in moderate to good yields with broad substrate scope. No external additive is employed for this kind of transformation.
摘要：
Near-infrared (NIR) fluorescent probes have been considered as powerful tools for exploring bioactive species and biological processes in living systems by virtue of the substantial merits of the NIR window (such as minimal photo-toxicity, deep tissue penetration, and low background interference). However, the development of effective NIR fluorescent probes for biological application is still facing great challenges due to some weakness (for example, pH sensitivity, poor chemical and photo-stability) of mainly current NIR fluorophores. Herein, we synthesized a novel fluorine atom substituted NIR chromenylium-cyanine fluorophore, termed CCF-OH, with an optically tunable hydroxyl group. Compound CCF-OH possess several optical advantages, including high chemical stability, high photo-stability, and high fluorescence quantum yield (Phi = 0.47). Significantly, a low pK(a) value (6.3) of CCF-OH was obtained, making its fluorescence signal steady around the pH ranging from 6.8 to 8.1. To demonstrate the practicability of CCF-OH, a mitochondria-targeted near-infrared fluorescent probe, N-Cys, was developed by masking the hydroxyl group of CCF-OH with an acrylate group as the recognition unit for cysteine (Cys). N-Cys responded to Cys with an obvious ratiometric signal. Furthermore, N-Cys has also been successfully applied for ratiometric NIR imaging of Cys in living cells, suggesting the great potential of the new NIR fluorophore, CCF-OH, for practical applications in living systems. (c) 2017 Elsevier B.V. All rights reserved.
作者机构：
[Qi, Fengpei; Song, Xiangzhi; Yang, Lei; Su, Yuanan; Geng, Yani] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Sha, Zhankui] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China.;[Qi, Fengpei] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.
通讯机构：
[Song, Xiangzhi] C;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
摘要：
A red-emitting fluorescent probe was developed for the sensitive and selective detection of H2S. Upon treatment with H2S, this probe exhibited a remarkable fluorescence enhancement (10 fold) with a large Stokes shift (125 nm). The detection limit of this probe was as low as 5.7 nM based on S/N = 3. The application of this probe in the detection of intracellular H2S in living cells is successfully demonstrated.
摘要：
Three-dimensional (3D) interconnected N-doped porous carbon- carbon nanotubes networks derived from melamine anchored with MoS2(MoS2/NPC-NCNTs) composite is successfully synthesized through a simple two-step method. The NPC-NCNTs hybrid is fabricated via simultaneous in-situ carbonization and catalytic growth using melamine formaldehyde polymer as the carbon and nitrogen precursors and SiO2 nanoparticles as the mesoporous template. MoS2 nanoflowers are anchored into the NPC-NCNTs by a hydrothermal method. In the composite, the NPC and NCNTs are entwined and interconnected each other, as a reinforced concrete structure to form a robust skeleton and an excellent 3D conductive network; MoS2 nanoflowers consisting of several nanosheets are closely incorporated with the NPCNCNTs hybrid. Benefiting from the unique features such as abundant porosity, enhanced electrical conductivity and superb buffering capability, the MoS2/NPC-NCNTs composite electrode delivers a high specific capacity (1218.7 mA h g(-1) at 200mA g(-1)), a superior rate capability (452.2 mA h g(-1) at 4000 mA g(-1)) and an excellent cyclic stability (capacity retention of 526.1mA h g(-1) after 400 cycles at 1000mA g(-1)). (C) 2018 Elsevier B.V. All rights reserved.
