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| 1 | Status of study on biological and toxicological effects of nanoscale materials显示文摘Because the physical and chemical properties of nanosized materials mostly differ from the existing microsized materials, their potential impacts on human health and the envi-ronment will be topics under the serious discussions in press and in a number of international scientific journals. We analyze and summarize the existing data of the experimental study on the biological activities and adverse effects of nanoscale materials/particles including single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron powders. Though some biological behaviors of nanoscale materials observed cannot be understood on the basis of the current knowledge, as the existing data are mostly preliminary, it is too early to make some ex-clusive conclusions on biological activities (or the toxicity) of any of nanoscale materials. The experimental techniques, the current topics, and the future research directions for this new re-search field are also discussed. | WANG Bing1, FENG Weiyue1, ZHAO Yuliang1, XING Gengmei1, CHAI Zhifang1, WANG Haifang2 & JIA Guang3 1. Laboratory for Bio-Environmental Health Sciences of Nanoscale Materials (Nanosafety Lab), Institute of High Energy Physics, Chi-nese Academy of Sciences, Beijing 100049, China 2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China 3. Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100083, China | 2005 | Science China Chemistry2005，48，5： | 9 |
| 2 | EFFECTS OF OXIDES IN INVESTMENT MOLD ON SURFACE PROPERTIES OF TITANIUM CASTINGS显示文摘Effects of different facing oxides, including including yttria colloidal and powders (Y/Y), yttria stabilized zirconia colloidal and powders (ZY/ZY), zirconia colloidal and powders (Z/Z) and zirconia colloidal and zireonite powders (Z/ZS) on the qualities of investment castings are studied. The outward appearance, microstructures, and microhardness profiles of castings made of commercial pure titanium, Ti--Al--V and Ti--Al--Zr are investigated. Castings made by shells with yttria as face materials have the least contamination and by zirconite shells have the most contamination. Thermodynamic of metal-mold reactions is also taken into consideration. | H.G. Wang, X.M. Qi, J. Tian, W.Q. Zha, G.S. Liang, Y. Y. Chen and J. Jia National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 8 |
| 3 | Microstructure evolution of in-situ nanoparticles and its comprehensive effect on high strength steel显示文摘A novel steel strengthened by nanoparticles was investigated in this study. A Fe-based high-strength steel was developed by the trace-element regional supply method during deoxidization to generate in situ nanoparticles with a high number density in the matrix. The results show that the endogenous nanoparticles are aluminum oxide (AI2O3) and titanium oxide (Ti3O5) formed in the liquid melt. Al2O3 functioned as a heterogeneous nucleation site for MnS during solidification;the size of the resultant complex inclusions was approximately 1-2 jjim. Furthermore, 13 nm Nb(C,N) precipitates grew with the Ti30 5 during the tempering process. These in situ nanopartides strongly affected refining of the grain and inclusions. The investigated steel was strengthened more than 200 MPa by precipitation strengthening and more than 265 MPa by grain refinement strengthening according to the Ashby-Orowan mechanism and the Hall-Petch relationship, respectively. | Rongjian Shi Zidong Wang Lijie Qiao Xiaolu Pang | 2019 | Journal of Materials Science & Technology2019，35，9： | 6 |
| 4 | Preparation, Characterization and Photo-Catalytic Behavior of Y_2O_3/TiO_2 Composite Semiconductor Nanopowder显示文摘Y 2O 3/TiO 2 samples were prepared by sol-gel process and characterized by means of X-ray diffraction (XRD), laser Raman spectra (LRS), UV-visible diffuse reflectance spectra (DRS), specific surface area (BET), and transmission electron microscopy (TEM). The results show that the relative intensity of 101 peak of anatase and 002 peak of rutile, the mean crystal diameter and mean particle diameter of Y 2O 3/TiO 2 samples decrease while specific surface area increases owing to doping Y 2O 3. Y 2O 3/TiO 2 samples have a larger specific surface area and higher thermal stability. Owing to quantum size effect, the reflectance of Y 2O 3/TiO 2 samples is larger than that of pure TiO 2 in the range of 380~460 nm and the position of Raman peaks varies slightly. Being a model reaction, the photo-catalytic degradation of methylene blue (MB) with positive charge and methyl orange (MO) with negative charge was investigated in TiO 2 and Y 2O 3/TiO 2 nanopowder suspension irradiated by high-pressure mercury lamp. As a result, the addition of Y 2O 3 to TiO 2 is detrimental to photo-activity of TiO 2 for MB photo-degradation and photo-catalytic behavior is enhanced due to 5%, 10% Y 2O 3 deposited on TiO 2 for the photo-degradation of MO. And the relationship between photo-physical properties and photo-activity was discussed. | 李芳柏 古国榜 李新军 万洪富 黄志尧 | 2001 | Journal of Rare Earths2001，19，3： | 5 |
| 5 | Enhanced Photocatalytic Activity in p-NiO Grafted n-TiO_2 Porous Coatings显示文摘We synthesized NiO-loaded TiO_2 porous p-n junctions by electrophoretic enhanced micro arc oxidation(EEMAO) technique which is a relatively simple and new method for producing composite coatings.Phase structure,chemical composition,and surface morphology of the NiO—TiO_2 coatings were investigated by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and scanning electron microscopy(SEM) techniques,respectively.Photocatalytic efficiency of the samples was studied through measuring the decomposition rate of 4-chlorophenol under UV irradiation.Results showed that the coatings mainly consisted of anatase,rutile,and nickel oxide phases.It was observed that a finer surface morphology,i.e.smaller pores,was obtained at lower voltages.Besides,the amount of nickel oxide loaded to the TiO_2 host increased with the voltage.The NiO-TiO_2 composite coatings showed a higher photoactivity than pure TiO_2 coatings revealing the effective role of NiO in decreasing the recombination rate of photogenerated electrons and holes.The maximum photocatalytic reaction rate constants for TiO_2and NiO—TiO_2 samples were obtained as 0.0064 and 0.0131 min^(-1),respectively.We also found that there was an optimum concentration of NiO where a maximum photocatalytic activity was achieved.A correlation between growth variables,structure,and photocatalytic efficiency was established. | S.Bassaki H.Niazi F.Golestani-Fard R.Naghizadeh R.Bayati | 2015 | Journal of Materials Science & Technology2015，31，4： | 4 |
| 6 | Dispersion state and catalytic properties of vanadia species on the surface of V_2O_5/TiO_2 catalysts显示文摘The dispersion state and catalytic properties of anatase-supported vanadia species are studied by means of X-ray diffraction (XRD), laser Raman spectroscopy (LRS), H2 temperature-programmed reduction (TPR) and the selective oxidation of o-xylene to phthalic anhydride. The almost identical values of the experimental dispersion capacity of V2O5 on anatase and the surface vacant sites available on the preferentially exposed (001) plane of anatase suggest that the highly dispersed vanadium cations are bonded to the vacant sites on the surface of anatase as derived by the incorporation model. When the loading amount of V2O5 is far below its dispersion capacity, the dispersed vanadia species might mainly consist of isolated VOx species bridging to the surface through V-O-Ti bonds. With the increase of V2O5 loading the isolated vanadia species interact with their nearest neighbors (either isolated or polymerized vanadia) through bridging V-O-V at the expenses of V-O-Ti bonds, resulting in the increase of the | 许波连 陈懿 范以宁 刘浏 林明 | 2002 | Science China Chemistry2002，45，4： | 4 |
| 7 | INVESTIGATION OF SURFACE MORPHOLOGY, STRUCTURE AND ELECTROCATALYTIC PROPERTIES FOR O_2 EVOLUTION OF TITANIUM BASED IrO_2+Ta_2O_5 COATINGS显示文摘Titanium based IrO2 +Ta2O5 oxide anodes with different compositions and pyrolysis temperatures were prepared by termodecompoisition method. By using X-ray diffraction (XRD), the structure and texture coefficient of the coatings, TC(hkl), of IrO2 rutile crystal have been tested. It showed that, the crystallization processes of IrO2 and Ta2O5 in xIrO2 +(100-x) Ta2 O5 (x is in mol%) films affected and confined each other.In the mixed system, IrO2 rutile phase existed as a solid solution with Ta, and attained the maximum solubility when x=70mol%, i.e. for the coating of 70% IrO2 +Ta2O5.For the coatings of low iridium content or at low preparing tem pemture, (110) and (101) pwtered orientations were dominant. However, preferred growth of IrO2 weakened with increasing either iridium content or temperature. Three typical surface morphologies were observed by using scanning electron tnicroscopy(SEM). The crystallite size of the mixed oxide coatings were finest for the the film of 70%IrO2 +30%Ta2O5,and decreased with the pyrolysis tempemture. As the results of the finest crystallite segregating on sudece and the maxitnum solid solubility of Ir and Ta component in deposits, the coatings with the composition of 70%IrO2 +Ta2O5 prepared at 450℃ presented the mdrimutn electrocatalgtic activitg for O2 evolution in 0. 5M H2SO4 solution.UP to 550℃, Ti base suffered to oxidation resulting in decreasing anode conductivity,therefore, coatings performed a low activity. | J.M Hu J.X. Wu H.M Meng YR. Zhu D.B. Sun and D.J. Yang(Beijing Corrosion and Protection Center, Open Laboratory of Corrosion, Erosion and Surface Technology,University of Science and Technology Beijing, Beijing 100083, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，3： | 3 |
| 8 | Novelty phase synthesis mechanism and morphology in resin-bonded Al–Al2O3–TiO2 composites at high temperatures under flowing N2显示文摘An Al–AlN core–shell structure is beneficial to the performance of Al–Al2O3 composites. In this paper, the phase evolution and microstructure of Al–Al2O3–TiO2 composites at high temperatures in flowing N2 were investigated after the Al–AlN core–shell structure was created at 853 K for 8 h. The results show that TiO2 can convert Al into Al3Ti(~1685 K), which reduces the content of metal Al and rearranges the structure of the composite. Under N2 conditions, Al3Ti is further transformed into a novelty non-oxide phase, TiCN. The transformation process can be expressed as follows: Al3Ti reacts with C and other carbides(Al4C3 and Al4O4C) to form TiCx(x < 1). As the firing temperature increases, Al3Ti transforms into a liquid phase and produces Ti(g) and TiO(g). Finally, Ti(g) and TiO(g) are nitrided and solid-dissolved into the TiCx crystals to form a TiCN solid solution. | Yang Sun Yong Li Li-xin Zhang Shi-ming Li Ming-wei Yan Jia-lin Sun | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，9： | 3 |
| 9 | Electrochemical Performance of Passive Film Formed on Ti-Al-Nb-Zr Alloy in Simulated Deep Sea Environments显示文摘Titanium alloy Ti-Al-Nb-Zr has high specific strength and becomes a promising structural material used in the deep sea.The excellent corrosion resistance of the alloy is derived from the protective passive film formed on its surface.By now,full agreement on interpretation of the anti-corrosion performance of the film in marine environment,especially in the deep sea,has not been reached.In this work,the electrochemical performance of two-surface-state Ti-Al-Nb-Zr alloys which are treated by mechanical polishing and anodizing pre-passivation in the simulated shallow sea,1000 m and 3000 m deep sea environments,is investigated.By interpreting the electrochemical kinetic parameters,it is found that the dominant cathodic process becomes hydrogen evolution in simulated deep sea environments,but the reduction rate is restrained by high hydrostatic pressure,which arrests the passivation of the alloy.Assisted by X-ray photoelectron spectroscopy analysis,it is found that the passive film mainly consists of titanium oxides.There are intermediate oxides with non-stoichiometric ratio involved in the film formation due to the low dissolved oxygen concentration and low temperature.The results of Mott-Schottky and electrochemical impedance show that the film has n-type semiconducting property with oxygen vacancies as the main point defects.The anti-corrosion performance in simulated deep sea environments is one order of magnitude lower than that in the simulated shallow sea environment.However,from 1000 to 3000 m,the corrosion resistance is reduced very slightly.In the inner layers of the passive film and the passive film formed in simulated deep sea environments,the proportion of lowvalence titanium oxides is relatively high.The doping of low-valence titanium(Ti(Ⅱ) or Ti(Ⅲ)) results in a porous structure and ion permeability of the passive film,as well as relatively low corro sion resistance. | Jing-Jing Dong Lin Fan Hai-Bing Zhang Li-Kun Xu Li-Li Xue | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，4： | 3 |
| 10 | Enhance of TiO_2 dopants incorporated reduced graphene oxide via RF magnetron sputtering for efficient dye-sensitised solar cells显示文摘In particular, the dye-sensitised solar cells(DSSCs) have a high potential in the rational energy conversion efficiency to secure our sustainable energy source.In the present study, advanced radio frequency(RF) magnetron sputtering technique was applied to incorporate titanium dioxide(TiO_2) dopants into reduced graphene oxide(rGO) nanosheet for improving the power conversion efficiency(PCE) of DSSCs device. An optimum TiO_2 content incorporated onto rGO nanosheet plays an important role in improving the PCE of DSSCs by minimising the recombination losses of photo-induced charge carriers.Based on the results obtained, 40-s sputtering duration for incorporating TiO_2 dopants onto rGO nanosheet exhibits a maximum PCE of 8.78% than that of pure rGO film(0.68%). In fact, the presence of optimum content of TiO_2 dopants within rGO nanosheet could act as mediators for efficient separation photo-induced charge carriers. However, the excessive of sputtering duration(e.g. 60 s) of TiO_2 dopants onto rGO nanosheet results higher charge recombination and lowers the PCE of DSSCs(5.39%). | Foo Wah Low Chin Wei Lai Kian Mun Lee Joon Ching Juan | 2018 | Rare Metals2018，37，11： | 3 |
| 11 | Electrochemical deposition of nano-structured ZnO on the nanocrystalline TiO_2 film and its characterization显示文摘One-dimensional structure of ZnO nanorod arrays on nanocrystalline TiO2/ITO conductive glass substrates has been fabricated by cathodic reduction electrochemical deposition methods in the three-electrode system,with zinc nitrate aqueous solution as the electrolyte,and were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),energy-dispersive X-ray (EDX) and photoluminescence (PL) spectra.The effects of film substrates,electrolyte concentration,deposition time,and methenamine (HMT) addition on ZnO deposition and its luminescent property were investigated in detail.The results show that,compared with on the ITO glass substrate,ZnO is much easily achieved by electrochemical deposition on the TiO2 nanoparticle thin films.ZnO is hexagonally structured wurtzite with the c-axis preferred growth,and further forms nanorod arrays vertically on the substrates.It is favorable to the growth of ZnO to extend the deposition time,to increase the electrolyte concentration,and to add a certain amount of HMT in the system,consequently improving the crystallinity and orientation of ZnO arrays.It is demonstrated that the obtained ZnO arrays with high crystallinity and good orientation display strong band-edge UV (375 nm) and weak surface-state-related green (520 nm) emission peaks. | LIN JingSheng,FU Wei,JING LiQiang,QU YiChun & LI ZhiJun Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) School of Chemistry and Material Science,Heilongjiang University,Harbin 150080,China | 2010 | Science China Chemistry2010，53，8： | 2 |
| 12 | Photocatalytic reduction of carbon dioxide by titanium oxide- based semiconductors to produce fuels显示文摘To tackle the crisis of global warming, it is imperative to control and mitigate the atmospheric carbon dioxide level. Photocatalytic reduction of carbon dioxide into solar fuels furnishes a gratifying solution to utilize and reduce carbon dioxide emission and simultaneously generate renewable energy to sustain the societies. So far, titanium oxide-based semiconductors have been the most prevalently adopted catalysts in carbon dioxide photoreduction. This mini-review provides a general summary of the recent progresses in titanium oxide- catalyzed photocatalytic reduction of carbon dioxide. It first illustrates the use of structural engineering as a strategy to adjust and improve the catalytic performances. Then, it describes the introduction of one/two exogenous elements to modify the photocatalytic activity and/or selectivity. Lastly, it discusses multi-component hybrid titanium oxide composites. | Xi CHEN Fangming JIN | 2019 | Frontiers in Energy2019，13，2： | 2 |
| 13 | One step synthesis of high efficiency nickel/mesoporous TiO_2 hybrid catalyst for hydrogen evolution reaction显示文摘Nickel-Ti O_2 hybrid catalysts are synthesized by electrodeposition and their catalytic activity with respect to the hydrogen evolution reaction is analyzed.Two types of titanium oxide particles,which are commercial particles of dense Ti O_2 and mesoporous TiO_2 particles synthesized by an aerosol method,are incorporated into the matrix of the nickel catalyst.Both nickel catalysts containing Ti O_2 particles presented higher catalytic activity than the conventional nickel Watts catalyst.Mesoporous TiO_2-modified nickel catalyst showed the highest catalytic activity towards HER in alkaline medium.In addition,this type of nickel catalyst increases its catalytic activity after ageing treatment,which is an indication of an increase in the electro-active area of the electrode. | Esteban A.Franceschini Melisa J.Gomez Gabriela I.Lacconi | 2019 | Journal of Energy Chemistry2019，28，2： | 1 |
| 14 | Effect of the Fourth Element on Bonding of Silicon Nitride Ceramics with Y_2O_3-Al_2O_3-SiO_2 Glass Solders显示文摘Bonding of Si 3N 4 ceramic was performed with Y 2O 3 Al 2O 3 SiO 2(YAS) X glass solders,which were mixed with TiO 2 (YT) and Si 3N 4 (YN), respectively. The effects of bonding conditions and interfacial reaction on the joint strength were studied. The joint strength in different bonding conditions was measured by four point bending tests. The interfacial microstructures were observed and analyzed by SEM, EPMA and XRD. It is shown that with the increase of bonding temperature and holding time, the joint strength increases reaching a peak, and then decreases. When TiO 2 is put into YAS solder,the bonding interface with Si 3N 4/(Y Sialon glass+TiN)/TiN/Y Sialon glass is formed. When YAS solder is mixed with Si 3N 4 powder, the interfacial residual thermal stress may be decreased, and then the joint strength is enhanced. According to microanalyses, the bonding strength is related to interfacial reaction. | 周飞 | 2001 | Journal of Rare Earths2001，19，2： | 1 |
| 15 | Synthesis and blood compatibility of rutile-type titanium oxide coated LTI-carbon显示文摘Titanium oxide films were synthesized by ion beam enhanced deposition, where the films were prepared by depositing titanium atoms and simultaneously bombarding with Xe + ions at an energy of 40 keV in an O 2 environment. The titanium oxide films exhibit rutile type structure with (100) orientation and the O/Ti ratio is about 2∶1. Ti 2+ , Ti 3+ and Ti 4+ coexist in the films. In vitro and in vivo investigations were used to investigate the blood compatibility of titanium oxide films. The results show that the blood compatibility of rutile type titanium oxide films is better than that of low temperature isotropic pyrolytic carbon (LTI carbon), which is widely used to fabricate artificial heart valve. It is thought that rutile type titanium oxide coated LTI carbon most probably becomes new biomaterial to fabricate artificial heart valves. | 张峰 陈宇 郑志宏 黄楠 柳襄怀 陈安清 蒋振斌 | 1998 | Science China(Life Sciences)1998，41，4： | 1 |
| 16 | Microstructure and Properties of Graphene Oxide-doped TiO_2 Coating on Titanium by Micro Arc Oxidation显示文摘Micro arc oxidation(MAO) coatings doped with graphene oxide(GO) were prepared on pure titanium by adding GO and sodium dodecyl benzene sulfonate(SDBS) into a sodium silicate solution. The as-deposited coatings were comparatively analyzed by scanning electron microscopy(SEM), energydispersive X-ray spectroscopy(EDS) and X-ray diffraction(XRD). The binding forces of the MAO, MAO+GO and MAO+GO+SDBS three coatings were measured by a scratch tester. The mechanical property of the three coatings was analyzed using the nano-indentation technique. The corrosion resistance of the coatings was tested by the electrochemical system in 3.5% NaCl solution. The photocatalytic activity of the prepared samples was evaluated by determining the degradation of methylene blue(MB) solution. The results showed that compared to the MAO coating, the morphologies and phase compositions of MAO+GO and MAO+GO+SDBS composite coatings were significantly different. These two composite coatings all had superior photocatalytic activity. Especially, the MAO+GO composite coating still had enhanced binding force and excellent corrosion resistance. Furthermore, the relationship between the microstructure and the properties of these three MAO coatings was analyzed. | 高羽 杨巍 XU Dapeng CHEN Jian JIANG Bailing | 2018 | Journal of Wuhan University of Technology(Materials Science)2018，33，6： | 1 |
| 17 | Preparation of TiCl4 with the Titanium Slag Containing Magnesia and Calcia in a Combined Fluidized Bed | 徐聪 袁章福 王晓强 | 2006 | Chinese Journal of Chemical Engineering2006，14，3X： | 1 |
| 18 | Surface Energy and Work of Adhesion of Titanium Oxide Related Materials显示文摘Surface energy and work of adhesion of titanium oxide related materials were investigated.Titanium oxide(TiOx) films were deposited by electron-beam evaporation system using TiO2 as a source material.The films deposited by various thickness and growth rate were etched subsequently by different plasma using various gases like Ar and O2.TiOx films were further modified by self-assembled monolayer(SAM)of silanes and ultraviolet(UV)irradiation.The surface modified TiOx films showed a wide range of water contact angles from 6.9°to 75.2°.The surface energies of Titania-related films and their work of adhesion with human blood were varied with different surface modification process.X-ray photoelectron spectroscopy(XPS)revealed that hydroxyl group present on the surface explains the hydrophilicity of the surface modified TiOx films.We also suggest that some surface modified samples can provide an excellent hemocompatible surface from the estimated work of adhesion between the surface modified TiOx samples and human blood. | Lin Zeng Zhao Jikui Du Guangyu Wang Qing Ba Dechun Han Jing Liu Chunming | 2012 | 稀有金属材料与工程2012，41，S1： | 1 |
| 19 | Enhancing Fluorescence of Shallow Nitrogen-Vacancy Centers in Diamond by Surface Coating with Titanium Oxide Layers显示文摘We present an enhancement of the uorescence of shallow (<10 nm) nitrogen-vacancy (NV-) centers by using atomic layer deposition to deposit titanium oxide layers on the diamond surface. In this way, the shallow NV-center charge states were stabilized, leading to the increasing uorescence intensity of about 2 times. This surface coating technique could produce a protective layer of controllable thickness without any damages to the solid-state quantum system surface, which might be an approach to the further passivation or packaging techniques for the solid-state quantum devices. | Wen-long Zhang Li-ren Lou Wei Zhu Guan-zhong Wang | 2019 | Chinese Journal of Chemical Physics2019，32，5： | 1 |
| 20 | Effect of substrate materials on rutile crystalline orientation in plasma-sprayed TiO2 coatings显示文摘TiO2 coatings are of technical importance owing to their promising applications to photocatalytical, electrical, optical and tribological coatings. Thermal spraying process has been widely used to deposit both metallic and nonmetallic coatings. During thermal spraying, spray particle at fully or partially melted condition is projected to a substrate and subsequently flattens, rapidly cools and solidifies. Therefore, a coating in lamellar structure is usually formed as a quenched microstructure. TiO2 coatings were deposited on different substrates through plasma spraying with fused-crushed powder in rutile phase as feedstock to reveal the crystalline orientation in the coatings. XRD results show that the coatings consist of rutile phase with a fraction of anatase phase, and the rutile phase presents a preferable crystalline orientation along [101] direction. It is found that the orientation factors of rutile phase in the thin coatings are significantly influenced by substrate materials. The thick coatings yield the same orientation factors of 0.22 to 0.23 on all substrates in spite of substrate materials. It is considered that the thermal properties of substrate materials are the dominant factors for the preferable crystalline orientation in rutile phase within plasmasprayed TiO2 coating. | YANG Guan-jun LI Chang-jiu WANG Yu-yue | 2004 | 中国有色金属学会会刊:英文版2004，14，z1： | 0 |
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