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Solvothermal synthesis of Co1-xNixFe2O4 nanoparticles and its application in ammonia vapors detection

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Progress in Natural Science:Materials International 2012年第1期22卷 53-58页

作者： Ya Tang a,b,Xinwei Wang a,Qinghong Zhang b,Yaogang Li a,n,Hongzhi Wang b a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,donghua university,Shanghai 201620,People’s Republic of China b College of Materials Science and Engineering,donghua university,Shanghai 201620,People’s Republic of China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 201620 People's Republic of China College of Materials Science and Engineering Donghua University Shanghai 201620 People's Republic of China

Magnetic Co1-xNixFe2O4 nanoparticles(NPs) were successfully synthesized via a solvothermal method using ethylene glycol as *** samples were characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),vibrating sample magnetometry(VSM) and gas sensing *** experimental results showed that the magnetic Co1-xNixFe2O4 NPs were composed of single phase spinel structure and the average crystallite size in the NPs is between 5.8 and 9.8 nm;the NPs are spherical with an average particle size of about 40-90 nm;the saturation magnetization(Ms) of the Co1-xNixFe2O4 NPs decreased linearly as the contents of Ni2t increased;and the as-prepared Co1-xNixFe2O4 NPs have a higher selectivity toward ammonia vapors and the Co0.8Ni0.2Fe2O4 has the best gas sensitivity of Co1-xNixFe2O4(0rxr1) NPs at working voltage of 8 V.

关键词： Magnetic materials Nanostructures Chemical synthesis Magnetic properties Gas sensing properties

Synthesis of dental resins using diatomite and nano-sized SiO2 and TiO2

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Progress in Natural Science:Materials International 2012年第2期22卷 94-99页

作者： Xiaoli Miao a,Meifang Zhu a,Yaogang Li b,Qinghong Zhang b,Hongzhi Wang a a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,donghua university,Shanghai 201620,China b Engineering Research Center of Advanced Glasses Manufacturing Technology,MOE,donghua university,Shanghai 201620,China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 201620 China Engineering Research Center of Advanced Glasses Manufacturing Technology MOE Donghua University Shanghai 201620 China

The mechanical properties of dental composites were improved by porous diatomite and nano-sized silica(OX-50)used as *** resin composites,filled with silanized OX-50 and silanized diatomite(40:60 wt/wt),presented the best flexural strength(133.1 MPa),elastic modulus(9.5 GPa)and Vickers microhardness(104.0 HV).Besides these,TiO2 nanoparticles were introduced to tune the dental resin composites colours which were valued by the CIE-Lab *** colour parameters(L*,a*,b*)showed that the colour changes of resin composites could be perceived obviously,when 300-400 nm TiO2 particles were introduced as *** resin composite,filled with 0.5 wt%TiO2,exhibited both clear discolouration(DE * =3.22)and high mechanical *** scanning electron microscope(SEM)equipped with an energy dispersive X-ray(EDX),the titanium elemental mapping results indicated that the TiO2 particles were distributed evenly in the prepared dental composites.

关键词： Dental resin composites TiO2 Diatomite Colour change Optical properties

Composition of the Value of Tourism Creative Products under the Influence of Regional Culture

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Journal of donghua university(English Edition) 2016年第1期33卷 167-170页

作者：刘晓东徐琪冯信群栗美娜 G lorious Sun School of Business and Management Donghua University Fashion Art Design Institute Donghua University Glorious Sun School of Business and Management Donghua University Institute of Military Health Management CPLA Faculty of Health ServiceSecond Military Medical University

With the analysis of the influence of regional culture on the value of tourism creative products,the characteristics of the value of tourism creative products were studied,and the impact of regional culture on the composition and realization of the value was summarized. Thus, the general law of the influence of external factors on the product value could be drawn. Characteristics of the value of tourism creative products is contrasted to analyze the requirement motivation of consumers and to seek the ways of realization for products value with the influence of regional *** mathematical evaluation model was employed for *** on the model,the influencing factors of the value of different types of creative products were explored, which would provide theories and enlightenment for the co-creation and appreciation of creative products in the future.

关键词： regional culture tourism creative products composition of value appreciation of value

Establishment of Costume Design Database Based on Image Resources in Daur Nationality

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Journal of donghua university(English Edition) 2014年第4期31卷 551-553页

作者：边菲刘灿明 Fashion Institute Donghua University

Through collecting, summarizing and effectively classifying the image resources in Daur nationality,and applying the theories and methods of costume design,ethnology and computer science,it investigates into the retrieval method and indicator system of images resources in Daur nationality in the context of digitalization. The preliminarily established application model of Daur costume design database can search out all qualified image resources from the database quickly according to the prerequisites given by users so that they can obtain information promptly. In particular,costume designers can get inspirations of creation and enlightenment on their creative thinking. Therefore,the effective integration of art and scientific researches can be realized.

关键词： Daur nationality ethnic costume image resource database

The Properties of Native Silk Fibroin (SF) Solution/Gel from Bombyx mori Silkworms during the Full Fifth Instar Larval Stage

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Journal of Wuhan university of Technology(Materials Science) 2011年第2期26卷 263-269页

作者：王洪 Key Laboratory of Textile Science & Technology Ministry of EducationDonghua University

The properties of native silk fibroin （SF） solution in the gland of silkworms during the full fifth instar larval stage were examined in an attempt to elucidate the mechanism of natural silk spinning in the *** flow and gelation behavior,birefringence phenomenon,rheological properties,specific viscosity and conformation of SF solutions from the gland of silkworms were measured by polarized light microscope,HAKKE rheometer,Ubbelohde viscometer and Solid-state 13C NMR,*** comparing their properties with regenerated SF solutions from natural silk fibers,it is believed that there exists a progressive maturation process favorable to spin silk fibers with excellent properties from native SF solution and a weak bonded and highly oriented SF gel network with SF molecules partly extended in α-helix conformation is formed in the middle section of the gland of *** suggests that a biomimetic maturation process for making spinnable solution might be necessary for artificial silk fiber spinning in order to obtain improved fiber properties.

关键词： silk fibre spin viscosity sol/gel

Facile one-pot sonochemical synthesis of hydrophilic ultrasmall LaF3:Ce,Tb nanoparticles with green luminescence

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Progress in Natural Science:Materials International 2012年第5期22卷 488-492页

作者： Lisha Zhang a,Wei Li b,Xianghua Hu b,Yanlin Peng b,Junqing Hu b,Xingyu Kuang b,Linlin Song b,Zhigang Chen b a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Environmental Science and Engineering,donghua university,Shanghai 201620,China b College of Materials Science and Engineering,donghua university,Shanghai 201620,China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and Engineering Donghua University Shanghai 201620 China College of Materials Science and Engineering Donghua University Shanghai 201620 China

Rare earth nanoparticles(RENPs) have great superiority as luminescent materials for broad applications,and a prerequisite for most of their application is to obtain hydrophilic RENPs with efficient luminescence and small diameter(<10nm).To address this problem,we report a facile one-pot sonochemical route with tetraethylene glycol as the solvent and tetrafluoroborate-based ionic liquid as the fluorine source for the synthesis of LaF3:Ce,Tb as the model of ***3:Ce,Tb nanoparticles with the diameter of about 6 nm were prepared in a very short ultrasound time(10min).Fourier transform infrared spectrum reveals the presence of tetraethylene glycol ligands on their surface,which confers high solubility of LaF3:Ce,Tb nanoparticles in *** 254 nm UV excitation,the aqueous dispersion of LaF3:Ce,Tb nanoparticles exhibits strong green emission with luminescent quantum yield of 50%.This work probably contributes to not only the fundamental research of shape-controlled LaF3:Ce,Tb nanoparticles but also new methods of producing other RENPs for broad applications.

关键词： Sonochemical synthesis LaF3:Ce,Tb Nanoparticles Luminescence

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信息通晓初探

图书馆 2011年第6期 41-43页

作者：尹雪东华大学图书馆上海201620

介绍信息社会中相对信息素养象征着更高能力层次的新术语——信息通晓,阐述其产生的背景和过程,分析美国图书馆界权威机构给出的信息通晓概念,探讨其内涵与教育目标;根据国外高校成功开展信息通晓教育项目的经验,总结和初步讨论信息通... 详细信息

介绍信息社会中相对信息素养象征着更高能力层次的新术语——信息通晓,阐述其产生的背景和过程,分析美国图书馆界权威机构给出的信息通晓概念,探讨其内涵与教育目标;根据国外高校成功开展信息通晓教育项目的经验,总结和初步讨论信息通晓的教育条件;对信息通晓在国内推行和实施提出一点建议。

关键词：信息通晓信息素养计算机素养批判性思维

Size-controlled and large-scale synthesis of organic-soluble Ag nanocrystals in water and their formation mechanism

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Progress in Natural Science:Materials International 2011年第6期21卷 447-454页

作者： Yu-yuan SHI,Bin SUN,Zhe ZHOU,Yong-tao WU,Mei-fang ZHU State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering,donghua university,Shanghai 201620,China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and Engineering Donghua University Shanghai 201620 China

Organic-soluble Ag nanocrystals(NCs) with tunable sizes in the range from 5.4 to 22.1 nm were synthesized by a facile, reproducible and easily scaled up route using water as solvent in the presence of oleic acid and an *** synthetic Ag NCs exhibits excellent hydrophobicity and can be well re-dispersed in various non- or weak-polar *** tunable sizes of the Ag NCs were achieved by simply adjusting the initial precursor ***-scale synthesis of the Ag NCs was realized at a high AgNO3concentration(0.4 mol/L).As much as 16.2 g highly uniform organic-soluble Ag NCs with 5 nm average diameter can be readily synthesized at low cost in a single reaction only using 400 mL water as solvent,which is adaptable to the industrial scale *** structure of the obtained Ag NCs was investigated in detail by X-ray diffractometry,transmission electron microscopy,Fourier transform infrared and thermal gravimetric analysis *** results reveal that the surface of the organic-soluble Ag NCs is coated with the monolayer surfactants consisting of oleic acid and the *** addition,on the basis of the sufficient evidences,a proposed mechanism based on the "bilayer surfactant-controlled reaction" successfully demonstrates the formation of high quality organic-soluble Ag NCs in the aqueous solution.

关键词： organic-soluble Ag nanocrystals large-scale size-controlled synthesis formation mechanism

Research of X3D Realizing NVEs

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Research of X3D Realizing NVEs