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Xiangang Zhai, Jianping Gao, Ruinan Xue, Xiaoyang Xu, Luyao Wang, Qiang Tian, Yu Liu
Bi2 MoO6 /reduced graphene oxide (Bi2 MoO6 /rGO) composites were fabricated by a facile one-pot hydrothermal approach, in which Bi2 MoO6 nanosheets and rGO were simultaneously obtained. The structure and composition of the as-synthesized Bi2 MoO6 and Bi2 MoO6 /rGO materials were characterized via FT-IR, BET, TGA, XRD, TEM, SEM and XPS analyses, and the electrochemical performance of Bi2 MoO6 /rGO as an anode in a lithium-ion battery was investigated. Compared with pristine Bi2 MoO6 , the Bi2 MoO6 /rGO composites have higher capacities, better cycle stability and higher rates...
February 7, 2018: Journal of Colloid and Interface Science
Meili Song, Houyong Yu, Jiping Gu, Shounuan Ye, Yuwei Zhou
Cross-linked polyvinyl alcohol (PVA) composite films with high structural stability were prepared by free radical copolymerization between cellulose nanocrystal (CNC) and maleic anhydride (MAH) modified PVA through spraying Fenton free radical as initiator. The influence of chemical cross-linked and physical network structure on mechanical, thermal and water absorption properties of the composite films were investigated. Compared to PVA and PVA/CNC composite film, significant improvements in the mechanical, thermal and water uptake properties of the cross-linked composite film were found...
February 19, 2018: International Journal of Biological Macromolecules
Shinmee Mah, Jung Hee Park, Hoi-Yun Jung, Kukcheol Ahn, Soyeon Choi, Hyun Seop Tae, Kyung Hee Jung, Jin Kyung Rho, Jae Cheol Lee, Carlo Gambacorti Passerini, Diletta Fontana, Soon-Sun Hong, Sungwoo Hong
No abstract text is available yet for this article.
February 22, 2018: Journal of Medicinal Chemistry
Yanfei Zhu, Aiping Hu, Qunli Tang, Shiying Zhang, Weina Deng, Yanhua Li, Zheng Liu, Binbin Fan, Kuikui Xiao, Jilei Liu, Xiaohua Chen
A novel strategy is proposed to construct a compact-nanobox (CNB) structure composed of irregular nanograins (average diameter ≈ 10 nm), aiming to confine electrode-electrolyte contact area and enhance initial Coulombic efficiency (ICE) of transition metal oxide (TMO) anodes. To demonstrate the validity of this attempt, CoO-CNB is taken as an example which is synthesized via a carbothermic reduction method. Benefiting from the compact configuration, electrolyte can only contact the outer surface of nanobox, keeping the inner CoO nanograins untouched...
February 22, 2018: ACS Applied Materials & Interfaces
Hao Jia, Mahmut Dirican, Chen Chen, Jiadeng Zhu, Pei Zhu, Chaoyi Yan, Ya Li, Xia Dong, Jiansheng Guo, Xiangwu Zhang
Sodium-ion batteries (SIBs) are promising alternative to lithium-ion batteries due to the low cost and natural abundance of sodium resources. Nevertheless, low energy density and poor cycling stability of current SIBs unfavorably hinder their practical implementation for smart power grid and stationary storage applications. Antimony tin (SnSb) is one of the most promising anode materials for next-generation SIBs attributing to its high capacity, high abundance, and low toxicity. However, the practical application of SnSb anodes in SIBs is currently restricted because of their large volume changes during cycling, which results in serious pulverization and loss of electrical contact between the active material and carbon conductor...
February 22, 2018: ACS Applied Materials & Interfaces
Ye-Zheng Zhang, Ze Zhang, Sheng Liu, Guoran Li, Xue-Ping Gao
Low sulfur utilization and poor cycle life of the sulfur cathode with high sulfur loadings remain a great challenge for lithium-sulfur (Li-S) battery. Herein, the free-standing carbon film consisting of porous carbon nanofibers (PCNFs) and carbon nanotubes (CNTs) is successfully fabricated by electrospinning technology. The PCNF/CNT film with three-dimensional (3D) and interconnected structure is promising for the uniformity of the high-loading sulfur, good penetration of electrolyte and reliable accommodation of volumetric expansion of the sulfur cathode...
February 22, 2018: ACS Applied Materials & Interfaces
Byung Dae Son, Jun Kyu Lee, Woo Young Yoon
Tungsten (W) was coated onto a silicon (Si) anode at the nanoscale via the physical vaporization deposition method (PVD) to enhance its electrochemical properties. The characteristics of the electrode were identified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis, and electron probe X-ray microanalysis. With the electrochemical property analysis, the first charge capacities of the W-coated and uncoated electrode cells were 2558 mAh g- 1 and 1912 mAh g- 1 , respectively...
February 21, 2018: Nanoscale Research Letters
Na Wu, Wei Wang, Lu-Qing Kou, Xue Zhang, Ya-Ru Shi, Tao-Hai Li, Feng Li, Jin-Ming Zhou, Yu Wei
By locating elemental Sn in an open anionic framework, the particle cracking arising from huge volume expansion of Sn-based anode material during lithiation/delithiation is alleviated and the cycling stability is greatly improved. The Sn-based metal-organic frameworks anode material shows superior cyclic stability with a capacity retention >92% (after 200 cycles) and high lithium storage capacity (610 mAh g-1).
February 21, 2018: Chemistry: a European Journal
Xiangzhong Kong, Ting Zhu, Fangyi Cheng, Mengnan Zhu, Xinxin Cao, Shuquan Liang, Guozhong Cao, Anqiang Pan
Three-dimensional (3D) binary oxides with hierarchical porous nanostructures are attracting increasing attentions as electrode materials in energy storage and conversion systems due to their structural superiority which not only create desired electronic and ions transport channels, but also possess better structural mechanical stability. Herein, unusual 3D hierarchical MnCo2O4 porous dumbbells have been synthesized by a facile solvothermal method combined with a following heat treatment in air. The as-obtained MnCo2O4 dumbbells are composed of tightly stacked nanorods and show a large specific surface area of 41...
February 21, 2018: ACS Applied Materials & Interfaces
Md Amdadul Huq, Shahina Akter, Sun-Young Lee
A novel bacterial strain MAH-10T was isolated from soil sample of a Chinese cabbage garden, Republic of Korea and was characterized using a polyphasic approach. Cells were Gram-staining negative, rod-shaped, yellowish orange colored, and motile. The strain was aerobic, catalase and oxidase are positive, and optimum growth temperature and pH were 28 °C and 6.5, respectively. Flexirubin-type pigments were found to be present. On the basis of 16S rRNA gene sequence analysis, strain MAH-10T belongs to the genus Flavobacterium and is most closely related to Flavobacterium tyrosinilyticum KCTC 42726T (98...
February 20, 2018: Current Microbiology
Narayanasamy Padmanathan, Han Shao, Kafil M Razeeb
Multifunctional, low-cost electrode and catalyst are desirable for next generation electrochemical energy storage and sensor applications. In this study, we demonstrate the fabrication of Ni3(PO4)2·8H2O nano/micro flakes layer on nickel foam (NF) by a facile one-pot hydrothermal approach and investigated this electrode for multiple applications including sweat based glucose and pH sensor as well as hybrid energy storage device, e. g., supercapattery. The electrode displays a specific capacity of 301.8 mAh g-1 (1552 F g-1) at an applied current of 5 mA cm-2 and able to retain 84% of its initial capacity after 10,000 cycles...
February 20, 2018: ACS Applied Materials & Interfaces
Tao He, Yun Lu, Yuefeng Su, Liying Bao, Jing Tan, Lai Chen, Qiyu Zhang, Weikang Li, Shi Chen, Feng Wu
We applied Zr4+ ions in the outer layer of Ni0.8Co0.1Mn0.1(OH)2 through co-precipitation method. The distribution of the Zr4+ in the final cathode materials showed a gradient distribution due to ion migration during thermal treatment. The doped layer was confirmed via various analysis methods (EDS, XRD, XPS and TEM), implying that Zr4+ can not only occupy both TM slabs and Li slabs, but also form Li2ZrO3 layer on the surface as a fast ion conductive layer. The doped Zr4+ in the TM slabs can stabilize the crystal structure due to strong Zr-O bonding energy, and the doped Zr4+ in the Li slabs can act as pillar ions to improve the structural stability and reduce cation mixing...
February 19, 2018: ChemSusChem
Zeyad D Nassar, Adel T Aref, Dushan Miladinovic, Chui Yan Mah, Ganesh V Raj, Andrew J Hoy, Lisa M Butler
Emerging data has linked certain features of clinical prostate cancer (PCa) to obesity and, more specifically, increased adiposity. Whereas the large number of clinical studies and meta-analyses that have explored the associations between PCa and obesity have shown considerable variability, particularly in relation to prostate cancer risk, there is an accumulating weight of evidence consistently linking obesity to greater aggressiveness of disease. In probing this association mechanistically, it has been posited that the peri-prostatic adipose tissue (PPAT), a significant component of the prostate microenvironment, may be a critical source of fatty acids and other mitogens and thereby influences PCa pathogenesis and progression...
February 20, 2018: BJU International
Jane McCusker, Deniz Cetin-Sahin, Sylvie Cossette, Francine Ducharme, Alain Vadeboncoeur, T T Minh Vu, Nathalie Veillette, Antonio Ciampi, Eric Belzile, Simon Berthelot, Paul-André Lachance, Rick Mah
STUDY OBJECTIVE: This study aims to develop and validate measures of experiences of an emergency department (ED) visit suitable for use by older adults or their family members. METHODS: A cohort of patients aged 75 years and older who were discharged home was recruited at 4 EDs. At 1 week after the visit, patients or family members were interviewed by telephone to assess problems experienced at the visit. Twenty-six questions based on 6 domains of care found in the literature were developed: 16 questions were administered to all patients; 10 questions were administered to bed patients only...
February 16, 2018: Annals of Emergency Medicine
Shanmugasundaram Karuppusamy, Lucy Mutharia, David Kelton, Niel Karrow, Gordon Kirby
Johne's disease (JD) is a contagious, chronic granulomatous enteritis of ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP). The aim of this study was to identify antigenic proteins from the MAP cell envelope (i.e. cell wall and cytoplasmic membranes) by comparing MAP, M. avium subsp. hominissuis (MAH) and M. smegmatis (MS) cell envelope protein profiles using a proteomic approach. Composite two-dimensional (2D) difference gel electrophoresis images revealed 13 spots present only in the image of the MAP cell envelope proteins...
January 24, 2018: Microbiology
Feixia Min, Yan Ran, Zhiwen Min, Fei Teng, Shiquan Wang, Huimin Wu, Chuanqi Feng
NiCO2S4 with different morphology was controllably fabricated by a facile hydrothermal and solvothermal route. The as-obtained samples were analyzed and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The results reveal that the sample (NCS-1) prepared by hydrothermal method manifest a mixture of nanorods and nanospheres. The sample (NCS-2) synthesized by solvothermal process takes on spherical nanoparticles (NPs). It is found that the morphology of the sample has much influence on the electrochemical property...
August 1, 2018: Journal of Nanoscience and Nanotechnology
Monireh Bakhshpour, Handan Yavuz, Adil Denizli
Molecular imprinting technique was used for the preparation of antibiotic and anti-neoplastic chemotherapy drug (mitomycin C) imprinted cryogel membranes (MMC-ICM). The membranes were synthezied by using metal ion coordination interactions with N-methacryloyl-(l)-histidine methyl ester (MAH) functional monomer and template molecules (i.e. MMC). The 2-hydroxyethyl methacrylate (HEMA) monomer and methylene bisacrylamide (MBAAm) crosslinker were used for the preparation of mitomycin C imprinted cryogel membranes by radical suspension polymerization technique...
February 19, 2018: Artificial Cells, Nanomedicine, and Biotechnology
Zhichang Xiao, Qi Song, Ruiying Guo, Debin Kong, Shanke Zhou, Xiaoxiong Huang, Rashid Iqbal, Linjie Zhi
To improve the electrochemical performance of carbonaceous anodes for lithium ion batteries (LIBs), the incorporation of both well-defined heteroatom species and the controllable 3D porous networks are urgently required. In this work, a novel N-enriched carbon/carbon nanotube composite (NEC/CNT) through a chemically induced precursor-controlled pyrolysis approach is developed. Instead of conventional N-containing sources or precursors, Schiff-base network (SNW-1) enables the desirable combination of a 3D polymer with intrinsic microporosity and ultrahigh N-content, which can significantly promote the fast transport of both Li+ and electron...
February 19, 2018: Small
Yanfeng Dong, Shuanghao Zheng, Jieqiong Qin, Xuejun Zhao, Haodong Shi, Xiaohui Wang, Jian Chen, Zhong-Shuai Wu
High-energy-density lithium-sulfur (Li-S) batteries hold promise for next-generation portable electronic devices, but are facing great challenges in rational construction of novel high-performance flexible electrode and innovative cell configuration for actual applications. Here we demonstrated an all-MXene-based flexible and integrated sulfur cathode, enabled by three dimensional alkalized Ti3C2 MXene nanoribbon (a-Ti3C2 MNR) frameworks as S/polysulfides host (a-Ti3C2-S) and two dimensional delaminated Ti3C2 MXene (d-Ti3C2) nanosheets as interlayer on polypropylene (PP) separator, for high-energy and long-cycle Li-S batteries...
February 17, 2018: ACS Nano
Shouling Wang, Ronghua Wang, Jie Chang, Ning Hu, Chaohe Xu
A self-supporting Co 3 O 4 /graphene hybrid film has been constructed via vacuum filtration of Co(OH) 2 nanosheet and graphene, followed by a two-step thermal treatment. Within the hybrid film, Co 3 O 4 nanoparticles with size of 40~60 nm uniformly in-situ grew on the surface of graphene, forming a novel porous and interleaved structure with strong interactions between Co 3 O 4 nanoparticles and graphene. Such fascinating microstructures can greatly facilitate interfacial electron transportation and accommodate the volume changes upon Li ions insertion and extraction...
February 16, 2018: Scientific Reports
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