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Recovery of Tungsten and Cobalt from wasted Tungsten Carbide

Recovery of Tungsten and Cobalt from wasted Tungsten Carbide

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者：林正雄劉聯惠林群峯葉玉莉 Graduate School of Ontomechatronics & Matrials Wu-feng Institute of Technology Department of Chemical and Materials Engineering Minghsin University of Science and Technology

The collected tungsten carbide/cobalt scrapped waste typically contains approximately 90%tungsten carbide and 10%cobalt.A nitric method is used to extract tungsten and cobalt from tungsten containing *** waste is first dissolved in nitric acid,which then makes cobalt soluble and becomes cobalt nitrate *** waste also oxidizes tungsten carbide to insoluble tungstenic acid *** tungsten carbide scraps are obtained from leftover of LCD glass cutting,after applying the same process as above,the remaining glass also needs to be separated from the tungstenic *** is concluded with XRF analysis that 93.8%of cobalt and 97.72%of tungsten can be obtained separately by this wet chemical *** ICP analysis,no more tungsten ion remained after two hours reaction in the cobalt recovery when 12 N of nitric acid was used for *** recovery materials obtained for tungsten were tungsten oxide and for cobalt a mixture of CoO and CoO.

关键词： tungsten carbide/cobalt waste cutting tools scrapped cutting tools recovery

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A disposable glucose biosensor based on SPCEs modified by hexacyanoferrate（Ⅲ）-iron nanorods mixture

A disposable glucose biosensor based on SPCEs modified by he...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者：陳文章陳秀蓉呂博文林鴻明林維宣 Department of Chemical and Materials Engineering Yunlin University of Science and Teehnology Department of Chemical and Materials Engineering Yunlin University of Science and Technology Department of Materials Engineering Tatung University

＜正＞An amperometic glucose biosensor was successfully constructed by drop- coating of glucose oxidase and ferricyanide（Ferri）-iron nanorods mixture onto the screen- printed carbon electrodes（SPCEs）.Iron nanorods were obtained by aqueous chemical growth without template or surfactant,and Ferri was used as the electron *** modified processes of the SPCEs and related electrochemical characteristics were analyzed by cyclic voltammetry,chronoamperometry and electrochemical impedance *** showed that the optimal applied potential for glucose measurement was 0.3 *** glucose measurement,Ferri-iron nanorods modified biosensor presents a wide linear response range（up to 22.2 mM） and a higher sensitivity（0.40μA/mM） with a lower detection limit of ca.2.0 mM.

关键词： Glucose biosensor Iron nanorods SPCEs

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Experimental Study on The Distribution of Particles Concentration Of Gas-Solid Fluidized Bed With Disparately Sized Binary Particles

Experimental Study on The Distribution of Particles Concentr...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者： Jiantao Cao Zhonghu Cheng Yitian Fang Yang Wang Institute of Coal Chemistry Chinese Academy of SciencesTaiyuanShanxi030001China Graduate Universi Institute of Coal Chemistry Chinese Academy of SciencesTaiyuanShanxi030001China

Experiments were carried out to study the concentration distribution of disparately sized binary particle in the iet region of a 1-m dia & 8-m high semicircular jening fluidized bed with a conical *** particles concentration was measured bv the optical fiber probe system and *** fine particles were injected coaxiaily to simulate fines recycled into the iet high temperature region m all actual operating unit with different fine particles feed-in *** Was found that the coarse particles concentration increases when the Jet gas。velocity reaches to the certain *** distributor gas-velocity increasing results in the increasing of the time。averaged particles volume concentration in the jet *** annular gas-velocity increase causes the particles concentration to reduce·And there IS high fine concentration existing in tIIe jet region of large jetting fiuidized *** fine particles concentration in the jet regmn increases with the increasing of fine particles feed-in quantity,and the fine concentration increased toward the bed *** reaching to a certain bed height，the fine concentration begins to decrease．

关键词：流化床颗粒浓度二元颗粒喷气射流

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Synthesis and Characterization of Nano Gold/PMMA Hybrid Materials by Synchrotron Radiation Hard X-ray

Synthesis and Characterization of Nano Gold/PMMA Hybrid Mate...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者：劉惠文林鴻明胡宇光劉維人陳文章 Department of Materials Engineering Tatung University Institute of Physics Academia Sinica Department of Chemical and Materials Engineering Yunlin University of Science and Technology

The new types of nano hybrid gold/PMMA materials are synthesized in this *** coated by nano gold particles and nano gold particles coated by PMMA can be synthesized by using different ratio of HAuCl and MMA precursors that are irradiated in synchrotron radiation hard x-ray without reducing *** to the photochemical mechanism,gold nanoparticles will produce by hard X-ray from HAuCl solution ***,the PMMA are synthesized by polymerization MMA monomer to form hybrid *** results indicate there are two types of hybrid materials can be *** 1:1 ratio of HAuCl and MMA,PMMA spheres covered by gold nanoparticles are *** 10:1 ratio of HAuCl and MMA,it results in gold nanoparticles coated by *** structures of nano hybrid gold/PMMA materials are characterized by transmission electron microscope,element analysis,dynamic-light scattering analyzer,Gel Permeation Chromatography analyzer and Raman spectrum *** new hybrid nanomatenals can be applied in the fields of biosensors and drug delivery.

关键词： nanoparticle gold poly（methyl methacrylate） hard x-ray

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Experimental Study on Gas-solid Flow in the Standpipe of the CFB Combined with a Coal Pyrolysis Reactor

Experimental Study on Gas-solid Flow in the Standpipe of the...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者： Zhifeng WANG Peng LIANG Jicheng BI State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of Sciences Tai State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of Sciences Tai State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of Sciences Tai

The experiment was conducted to study the pressure profiles and gas-solid flow in the standpipe of a new cold model of circulation fluidized bed reactor combined with a coal pyrolysis *** effects of superficial gas velocity in the riser Ur,circulating rate G,and aeration added to the pyrolysis chamber Qa on the axial pressure profiles in the standpipe were *** Ur mcreasing the negative pressure gradient in standpipe decreased *** Gs increasing the negative pressure gradient and slip VeJocity In the standpipe were also *** of aeration added to the pyrolysis chamber on gas/solid flow state in the standpipe was *** Ur and orifice of the valve at the bottom of the standpipe kept constant，pressure distribution trend especiallv at the top of the standpipe would become larger with Qa *** flow pattern in the standpipe changing from negative pressure mflerence to positive pressure difference occurred with Ur increasing when Qa and the orifice of the valve at the bottom of the standpipe were *** the modified Ergun equation was suitable for describing the moving bed flow in the standpipe ofthe system．

关键词：循环流化床热解反应器压力分布滑移速度气固两相流

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Anodic TiO2 Nanotube Arrays for Photoelectrochemical Applications

Anodic TiO2 Nanotube Arrays for Photoelectrochemical Applica...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者：簡淑華林進榮游文岳 Institute of Chemistry Academia SinicaTaipei 11529China

Ordered one-dimensional TiO nanoarchitectures have stimulated considerable research interest due to their impressive properties in numerous photoelectrochemical *** this study,high-aspect-ratio TiO nanotube arrays perpendicular to titanium foil(TiNT/Ti) were fabricated by anodic oxidation of Ti foil in the fluorine-containing electrolyte followed by calcination in oxygen *** was found that flexible back-illuminated TiNT/Ti-based dye-sensitized solar cell(DSSC) exhibited better photovoltaic performance than that of TiO-nanoparticles/Ti-based DSSC due to the enhanced light-harvesting efficiency,rapid electron diffusion rate,prolonged electron lifetime and reduced dark *** we developed a facile and environment-friendly process to flake TiNT arrays off the titanium substrate and then chemically remove the bottom caps for obtaining free-standing opened-end TiNT *** opened-end TiNT film showed higher photocatalytic activity in degradation of methylene blue under UV light illumination as compared to its closed-end counterpart due to more efficient light utilization and reactant/product *** of optically transparent electrode with opened-end TiNT films on fluorine-doped tin oxide glass(opened-end TiNT/FTO) was achieved using a sol-gel processed TiO nanoparticle paste as an *** a result of superior light-harvesting and electron-collecting efficiencies, this opened-end TiNT/FTO electrode has also presented its prevailing advantages in applications to front-illuminated DSSC with an efficiency of 9.1%and to photoelectrolytic water splitting with considerably high activity under AM1.5G simulated sunlight illumination.

关键词： anodic TiO2 nanotube arrays photocatalysis dye-sensitized solar cell solar water splitting

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多孔高胺基交联壳聚糖微球的制备和对有机染料吸附性能的研究

多孔高胺基交联壳聚糖微球的制备和对有机染料吸附性能的研究

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者：张振杨晓玲朱以华华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室

以液体石蜡为有机分散介质,环氧氯丙烷为交联剂,采用反相悬浮法制备交联壳聚糖,并研究了交联壳聚糖对有机染料的吸附性能.壳聚糖分子中存在大量的胺基、羟基,对溶液中的金属离子和有机染料等有良好的吸附性能.交联后的壳聚糖,机械强度... 详细信息

以液体石蜡为有机分散介质,环氧氯丙烷为交联剂,采用反相悬浮法制备交联壳聚糖,并研究了交联壳聚糖对有机染料的吸附性能.壳聚糖分子中存在大量的胺基、羟基,对溶液中的金属离子和有机染料等有良好的吸附性能.交联后的壳聚糖,机械强度增加便于回收,电荷也更加集中提高了吸附能力.另外为了提高壳聚糖的吸附性能,在交联中添加适量的致孔剂聚乙二醇增加比表面积,并采用甲醛预交联生成Sciff碱的方法保护胺基,之后再用酸处理,脱去Sciff碱.

关键词：多孔微球高氨基交联壳聚糖 Sciff碱吸附有机染料

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Comparison of stem cells labeling using paramagnetic and superparamagnetic MRI contrast agents

Comparison of stem cells labeling using paramagnetic and sup...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者：戴明鳳蕭仲凱楊中宜陳新泰王薏婷陳雅芳王兆麟廖漢文 Dept.of Physics Tsing Hua University Dept.of Medical Imaging Taiwan University Hospital and College of Medicine Institute of Biomedical Engineering College of Medicine and EngineeringTaiwan University

Stem cells are capable of replication and differentiation so that they are widely studied for its potential application for tissue engineering and *** stem cells are delivered into human body,it is hard to detect its existence and trace its migration route between different *** and superparamagnetic substances are used for labeling stem cells that could be visualized under magnetic resonance imaging(MRI).However,the efficacy,sensitivity and feasibility between paramagnetic and superparamagnetic substances labeling are not fully investigated. We investigated paramagnetic and superparamagnetic substance labeling by choosing clinically widely used gadolinium chelates as choice for paramagnetic contrast agent and iron oxide nanoparticles as candidate for superparamagnetic substance because the toxicity and adverse effects to the cells are previously widely *** gadolinium chelates and iron oxide nanoparticles are labeled into human mesenchymal stem cell line at different concentration and the optimized concentration was determined by maintaining cell viability the same as cells without *** optimized concentration,labeled cells at numbers from 1000 to 2×10～5 are placed into test tubes for MRI *** minimal cell numbers that could be detected by clinical MRI was *** cells are further injected into bilateral flank of living *** clinical 1.5 Tesla MRI scanning,the images are evaluated for stem cell detecting ability. We found there is 8 fold sensitivity increases in cells labeled with iron oxide nanoparticles,which has detecting limit of 12500 cells whereas only 50000 or more cells could be detected in gadolinium chelates labeled *** living animal study,although iron oxide nanoparticle labeled stem cells could be detected 8 times more sensitive,the magnetic susceptibility artifact interrupted the visualization of adjacent organ *** conclude that labeling stem cells with sup

关键词： biomagnetics paramagnetic particles superparamagnetic particles MRI contrast agents

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Study on Application of Nano-Titanium Dioxide in Functional Fiber

Study on Application of Nano-Titanium Dioxide in Functional ...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者： Guo-Liang Shen,Gui-Ling Ning (State Key Laboratory of Fine Chemicals,School of Chemical Engineering of Dalian University of Technology,Dalian 116012,China)

The general application situation and prospect of nanometer technology in textile industry were briefly introduced,the application of nano-titanium in functional fiber as antimicrobials,antistatic agent,infrared absorption,ultraviolet absorption was discussed,research direction of nano-titanium dioxide applied in functional fiber was summarized henceforth.

关键词： nano-titanium dioxide functional fiber antimicrobials antistatic agent infrared absorption ultraviolet absorption

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Determinations of Two-Layered Atmospheric Extinction Coefficients from Sun-Photometer Measurements

Determinations of Two-Layered Atmospheric Extinction Coeffic...

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者： Qingshan Xu,Kaibing Zhou,Xuebing Li,Huanling Hu (Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China)

An algorithm is present in this paper for determination of the two-layer atmospheric mean extinction coefficients from sun-photometers *** atmospheric layer is assumed as uniform parallel spherical surfaces in this study,which is more reasonable for the true atmospheric *** algorithm is applied to the data measured by means of the CIMEL CE-318 instrument and the reasonable results are obtained.

关键词： layered atmosphere extinction coefficient sun-photometer

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