摘要：
Polyhedron composed of Mn2O3 nanoparticles with an average diameter of 0.5-1.0 μm have been prepared using spent Zn-Mn batteries.The product was characterized by X-ray powder diffraction and scanning
摘要：
The PVP/Fe3O4/TBT composite nanofibers have been successfully fabricated via a facile electrospinning assisted sol-gel process, and magnetic TiO2 hollow nanofibers are obtained by the calcination process. The effects of TBT and Fe3O4 dosage on the morphologies and hollow structure of nanofibers are systematically investigated. Scanning electron microscopy (SEM) demonstrated that the magnetic TiO2 nanofibers had a hollow structure with the average diameter of 200 nm. XRD results exhibited that magnetic TiO2 hollow nanofibers with well crystallized anatase phase were obtained. Both the hollow structure and well crystallized anatase phase of TiO2 nanofibers play very important role in photocatalytic activity. Moreover, the magnetic test demonstrated TiO2 hollow nanofibers possessed an excellent magnetic responsiveness, which facilitated the separation of TiO2 hollow nanofibers.
期刊：
Chemical Communications,2015年51(50):10146-10149 ISSN：1359-7345
通讯作者：
Zhang, Juntao
作者机构：
[Xu, Xuemei; Wei, Benmei; Lou, Xiaoding; Liu, Nannan; Xia, Fan; Zhang, Juntao; Ou, Xiaowen] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Large Format Battery Mat & Syst, Wuhan 430074, Hubei, Peoples R China.;[Xia, Fan; Zhang, Juntao] Huazhong Univ Sci & Technol, Coll Life Sci & Technol, Natl Engn Res Ctr Nanomed, Wuhan 430074, Hubei, Peoples R China.;[Zhang, Juntao] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Zhang, Juntao] H;Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Large Format Battery Mat & Syst, Wuhan 430074, Hubei, Peoples R China.
摘要：
The influence of long and short polymer chains on the gating properties of nanochannel systems modified with a NIPAAm-co-PBA copolymer have been explored. We not only discovered the negative temperature gating behavior of the NIPAAm modified nanochannel systems for the first time, but also achieve these two fully opposite gating behaviors (negative/positive) on the same platform.
作者机构：
[Hua.Fang] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Ming Tian.Li; Ying.Wang] Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong 643000, China;[Ming Tian.Li; Ying.Wang] Institute of Materials Science and Chemistry Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
会议名称：
2nd International Conference on Advanced Composite Materials and Manufacturing Engineering, CMME 2014
会议时间：
22 March 2014 through 23 March 2014
关键词：
Acrylate;Adhesive;Alcohol-soluble
摘要：
A kind of alcohol-soluble acrylate adhesive was synthesized by solution-polymerization. The influences of monomer ratio of soft to hard, function monomer and initiator content were studied on adhesive performance. The optimal conditions: ethanol as solvent, MA : MMA : AA : VAc = 4.5 : 4 : 1.5 : 2 : 0.8, and BPO is 0.8% of total mass, the temperature is 73 °C for 3.5 h. The properties of adhesive were determined.
会议名称：
The 3rd Symposium on Liquid Crystal Photonics(第三届液晶光子学国际会议)
会议时间：
2014-4-19
会议地点：
上海
会议主办单位：
国际信息显示学会北京分会;美国光学学会;中国自然科学基金
会议论文集名称：
The 3rd Symposium on Liquid Crystal Photonics(第三届液晶光子学国际会议)论文集
摘要：
Two kinds of electroconvection patterns in an ether-bridged bent-core nematic liquid crystal material (BCN), which appear in different frequency ranges, are examined and compared. One is a longitudinal pattern with the stripes parallel to the orientation of the BCN and with a periodicity of approximately the cell thickness, occurring in the high-frequency range of several hundreds Hz; the other one is oblique stripes, which results in a zigzag pattern, and appears in the low-frequency range of several tens Hz. In addition, within an intermediate-frequency range, transformations from oblique to longitudinal and then to normal stripes occur at increased ac voltages. In particular, we investigated the temperature behavior of longitudinal and oblique stripes: When the temperature T increases and approaches the clearing temperature Tc, the contrast of the domains is enhanced and the frequency range of existence becomes wider, while the onset voltages increase only moderately instead of diverging, thus suggesting an isotropic mechanism of pattern formation.
摘要：
Based on converting both the matrix (Ta) and the analytes (Mn, Cr, and Cu) into different volatile fluorides at high temperature in a graphite furnace, an in situ matrix removal method was developed for the determination of trace amounts of Mn, Cr, and Cu in high purity tantalum pentaoxide (Ta_2O_5) by electrothermal vaporization-inductively coupled plasma mass spectrometry (ETV-ICP-MS) with a polytetrafluoroethylene slurry (PTFE) as the chemical modifier. The experimental results showed that the more volatile TaF_5 was removed in situ during the pyrolysis stage prior to the determination of the analytes. As a result, the matrix effect was effectively suppressed. Under optimum operating conditions, the detection limits (DLs) for Mn, Cr, and Cu were found to be 7.3, 4.8, and 10 ng g~(-1) with relative standard deviations (RSDs) of less than 4.5%. The recommended method was successfully applied to the determination of trace amounts of Mn, Cr, and Cu in Ta_2O_5. The results obtained from external calibrations and the method of standard additions were in good agreement with those obtained by conventional pneumatic nebulization (PN) ICP-MS after separation of the matrix with a solvent extraction procedure.
摘要：
A method, was developed for the determination of trace Dy and Y in biological and environmentar water samples based on solidified floating organic drop microextraction (SFODME) combined with electrothermal vaporization (ETV) inductively coupled. plasma mass spectrometry (ICP-MS). l-(2-pyridylazo)-2-naphthol (PAN) was used as both chelating reagent in SFODME and chemical modifier in ETV for separation, preconcentration, and volatilization of the REEs prior to their determination. The main factors affecting the preconcentration and determination, including pH, amount of PAN, extraction time, stirring rate, sample solution volume, and temperature program, were examined in detail. Under the selected conditions, the detection limits of this method were 0.019 pg mL~(-1) of Dy and 0.032 pg mL~(-1) of Y, and the relative standard deviations were 4.7% and 5.4%, respectively (n=9, c=0.1 ng mL~(-1)). This method was applied for the determination of trace Dy and Y in certified reference material and natural water samples with recoveries of 91.3-108%.
