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| 1 | Photocatalytic properties of BiOX (X = Cl, Br, and Ⅰ)显示文摘A novel series of photocatalysts,bismuth oxyhalide(BiOX,X =Cl,Br,and I),were synthesized by a hydrolysis method.The powder sam- pies were characterized by the use of X-ray diffraction(XRD),scanning electron microscope,and UV-Vis spectrophotometer.The XRD pattern showed that all the BiOX were well crystallized in the tetragonal structure.The band gaps of the sheet-shaped compounds BiOX(X= Cl,Br,and I)were 3.44,2.76,and 1.85 eV,respectively.BiOBr showed the highest photocatalytic activity in degrading rhodamine B(RhB) and evolving O_2 for its proper valence band(VB).BiOI has no photocatalytic activity.BiOCl showed the highest activity in decomposing isopropanol because of electron-hole pair separation through trapping electrons by oxygen vacancies. | AN Huizhong DU Yi WANG Tianmin WANG Cong HAO Weichang ZHANG Junying | 2008 | Rare Metals2008，27，3： | 43 |
| 2 | Visible Light Photocatalytic Properties of Metastable γ-Bi_2O_3 with Different Morphologies显示文摘The metastable γ-Bi_2O_3 photocatalysts with different morphologies were fabricated by means of a chemical precipitation method.The microstructure of as-prepared samples was characterized by X-ray diffraction,transmission electron microscopy and ultraviolet-visible diffusion reflectance spectroscopy.The photocatalytic performance of Bi_2O_3 powder was evaluated using rhodamine B as a model pollutant under visible light irradiation.The visible light photocatalytic activity of Bi_2O_3 with different morphologies is as follows,nanorod > nanorod/nanoflake > N doped TiO_2 > irregular particle > agglomerated particle.The γ-Bi_2O_3 shows the best photocatalytic performance and it can effectively degrade 97%RhB within 60 min. | Weichang Hao Yuan Gao Xi Jing Wen Zou Yan Chen Tianmin Wang | 2014 | Journal of Materials Science & Technology2014，30，2： | 4 |
| 3 | Enhanced Photocatalytic Activity of Bi_(24)O_(31)Br_(10): Constructing Heterojunction with BiOI显示文摘Bismuth-based compounds have been regarded as an important class of visible-light photocatalysts due to their special electronic structures. In this paper, iodide ions are introduced to modify bismuth-based compound, Bi_(24)O_(31)Br_(10), forming a Bi_(24)O_(31)Br_(10)/BiOI heterojunction structure. A significant enhancement of photocatalytic activity compared to the parent compounds is observed in de-coloration of rhodamine B(Rh.B) solution. The improved photocatalytic property of Bi_(24)O_(31)Br_(10)/BiOI heterojunction is ascribed to the unique electronic structure consisting of complementary band structures of BiOI and Bi_(24)O_(31)Br_(10).Iodide ions are regarded as an effective reagent to construct bismuth-based photocatalytic heterojunctions with improved photocatalytic activity. | Xi Lou Jun Shang Liang Wang Haifeng Feng Weichang Hao Tianmin Wang Yi Du | 2017 | Journal of Materials Science & Technology2017，33，3： | 3 |
| 4 | The role of oxygen vacancies in the high cycling endurance and quantum conductance in BiVO4-based resistive switching memory显示文摘Resistive random access memory(RRAM)has emerged as a new discipline promoting the development of new materials and devices toward a broad range of electronic and energy applications.Here,we realized a memristive device with weak dependence on the top electrodes and demonstrated the quantized conductance(QC)nature in BiVO4 matrix.The electronic properties have been investigated by the measurements of I-V curves,where the resistive switching(RS)phenomenon with stable switching ratio and excellent longterm retention capabilities are identified.Two more inert materials,TiN and Pd,are applied as the top electrodes to exclude the influence of electrodes on the RS states and QC behavior.The X-ray photoelectron spectroscopy results and transport measurements reveal that the conductive filament(CF)is composed by elemental bismuth.The naturally existed oxygen vacancies in BiVO4 matrix plays as the role of catalyst in the formation and dissolution of CF in BiVO4-based RRAM device,which is the primary cause for the observed weak dependence of switching performance in this device on the type of top electrodes.Our results clearly illustrate that BiVO4 could be a new idea platform to realize the high scalability,high cycling endurance,and multilevel storage RRAM devices. | Mengting Zhao Xiaobing Yan Long Ren Mengliu Zhao Fei Guo Jincheng Zhuang Yi Du Weichang Hao | 2020 | InfoMat2020，2，5： | 2 |
| 5 | Synthesis of largesized monodisperse polystyrene microspheres by dispersion polymerization with dropwise monomer feeding procedure显示文摘 | Qi H ongfei Hao Weichang Xu H uaizhe | 2009 | Colloid Polym Sci2009，287，2： | 1 |
| 6 | Comparison Study of Corrosion Behavior and Biocompatibility of Polyethyleneimine (PEI)/Heparin and Chitosan/Heparin Coatings on NiTi alloy显示文摘Biomedical molecule has received extensive application in surface modification coating.In this paper,polyethyleneimine (PEI)/heparin coating and chitosan/heparin coating on NiTi alloy substrates were prepared by layer-by-layer method,and differences of corrosion behavior and biocompatibility of the coatings were studied.Static contact angles and Fourier transform infrared (FT-IR) test were used to analysis the surface morphology and structure character of the materials,and atomic absorption spectrum was used to verify the corrosion behavior of the materials.Furthermore,hemolysis,dynamic clotting time and platelet binding test were utilized to investigate the biocompatibility of the materials.The results revealed that the blood compatibility of PEI/heparin coating is better than that of the chitosan/heparin coating as well as the substrate. | Ping Dong Weichang Hao Yayi Xia Guozu Da Tianmin Wang | 2010 | Journal of Materials Science & Technology2010，26，11： | 1 |
| 7 | Synthesis of large-sized monodisperse polystyrene microspheres by dispersion polymerization with dropwise monomer feeding procedure显示文摘 | Hongfei Qi Weichang Hao Huaizhe Xu Junying Zhang Tianmin Wang | 2009 | Colloid and Polymer Science2009，，2： | 1 |
| 8 | Luminescence of nanosized ZnO/polyaniline films prepared by self-assembly 显示文摘 | Junyng Zhang Haibng Feng Weichang Hao | 2006 | Ceramics International2006，33，5： | 1 |
| 9 | An engineered lamellar bone mimicking full-scale hierarchical architecture for bone regeneration显示文摘Lamellar bone,compactly and ingeniously organized in the hierarchical pattern with 6 ordered scales,is the structural motif of mature bone.Each hierarchical scale exerts an essential role in determining physiological behavior and osteogenic bioactivity of bone.Engineering lamellar bone with full-scale hierarchy remains a longstanding challenge.Herein,using bioskiving and mineralization,we attempt to engineer compact constructs resembling full-scale hierarchy of lamellar bone.Through systematically investigating the effect of mineralization on physicochemical properties and bioactivities of multi-sheeted collagen matrix fabricated by bioskiving,the hierarchical mimicry and hierarchy-property relationship are elucidated.With prolongation of mineralization,hierarchical mimicry and osteogenic bioactivity of constructs are performed in a bidirectional manner,i.e.first rising and then descending,which is supposed to be related with transformation of mineralization mechanism from nonclassical to classical crystallization.Construct mineralized 9 days can accurately mimic each hierarchical scale and efficiently promote osteogenesis.Bioinformatic analysis further reveals that this construct potently activates integrinα5-PI3K/AKT signaling pathway through mechanical and biophysical cues,and thereby repairing critical-sized bone defect.The present study provides a bioinspired strategy for completely resembling complex hierarchy of compact mineralized tissue,and offers a critical research model for in-depth studying the structure-function relationship of bone. | Tao Yang Zhichao Hao Zhenzhen Wu Binxin Xu Jiangchen Liu Le Fan Qinmei Wang Yanshan Li Dongying Li Sangzhu Tang Chuanzi Liu Weichang Li Wei Teng | 2023 | Bioactive Materials2023，，9： | 1 |
| 10 | Statistical root cause analysis of novel faults based on digraph models显示文摘 | Yiming Wan Fan Yang Ning Lv Haipeng Xu Hao Ye Weichang Li Peng Xu Liming Song Adam K. Usadi | 2013 | Chemical Engineering Research and Design2013，，1： | 1 |
| 11 | Fabrication and biocompatibility of polyethyleneimine/heparin self-as- sembly coating on NiTi alloy 显示文摘 | Dong Ping Hao Weichang Wang Xu | 2008 | Thin Solid Films2008，516，： | 1 |
| 12 | Improvement of thermal stability of ZrSiON based solar selective absorbing coating显示文摘Solar selective absorbing coatings(SSACs)are required to have not only excellent optical property but also outstanding thermal stability for high temperature applications.The optical properties of Mo/ZrSiN/ZrSiON/SiO_(2) SSAC had been optimized successfully before.Herein,we are focusing on the evaluation and mechanism of thermal stability of this multilayer coating for its potential applications in concentrated solar power(CSP)systems.Fortunately,the coating exhibits excellent thermal stability after aging at 400℃ for 1500 h in vacuum.At aging temperature of 500℃ for 1000 h or 600℃ for 300 h in vacuum,the slight inter-diffusion between Mo layer and stainless steel(SS)substrate occurs.At higher aging temperature of 700℃ for 100 h in vacuum,the serious inter-diffusion between Mo layer and SS substrate leads to invalidation of the coating,which has been evidenced by Rutherford backscattering spectrometry(RBS)and X-ray diffraction(XRD)technologies.Additionally,this coating also has an outstanding thermal stability after aging at 400℃for 300 h in air.A heating-cooling cycling(HCC)treatment evidences the good thermal stability of this coating working in cold environment(60℃).The results reveal that this coating can be a promising candidate not only for CSP system in high temperatures but also for usage in cold environment. | Yuping Ning Cong Wang Wenwen Wang Eric Tomasella Ying Sun Ping Song Weichang Hao Angelique Bousquet | 2020 | Journal of Materiomics2020，6，4： | 1 |
| 13 | Advances in bismuth-based topological quantum materials by scanning tunneling microscopy显示文摘In recent years,topological quantum materials(TQMs)have attracted intensive attention in the area of condensed matter physics due to their novel topologies and their promising applications in quantum computing,spin electronics and next-generation integrated circuits.Scanning tunneling microscopy/spectroscopy(STM/STS)is regarded as a powerful technique to characterize the local density of states with atomic resolution,which is ideally suited to the measurement of the bulk-boundary correspondence of TQMs.In this review,using STM/STS,we focus on recent research on bismuth-based TQMs,including quantum-spin Hall insulators,3D weak topological insulators(TIs),high-order TIs,topological Dirac semi-metals and dual TIs.Efficient methods for the modulation of the topological properties of the TQMs are introduced,such as interlayer interaction,thickness variation and local electric field perturbation.Finally,the challenges and prospects for this field of study are discussed. | Yaqi Li Jingwei Zhang Xun Xu Weichang Hao Jincheng Zhuang Yi Du | 2022 | Materials Futures2022，1，3： | 0 |
| 14 | Theoretical insights into nitrogen oxide activation on halogen defect-rich{001}facets of bismuth oxyhalide显示文摘Surface vacancies,serving as the activation centers for surface-adsorbed species,have been widely applied in catalysts to improve their activity and selectivity.In the case of ternary compound semiconductors,there is some controversy about exposed atoms and surface defects.Two-dimensional layered BiOCl is an important photocatalyst,which has had numerous studies focused on its oxygen vacancy(O_V)and bismuth vacancy(Bi_V).It has been realized that its(001)surface can consist of exposed halogen atoms rather than oxygen atoms,which thus needs a new explanation for its surface defect engineering mechanism.Using first-principles calculations,the activation behavior of NO_X(NO_(2),NO,N_(2)O)at a chlorine vacancy(Cl_V)on the BiOCl(001)surface is systematically studied.It is found that after introducing Cl_V on BiOCl(001)surfaces,NO_X molecules all show excellent activities with longer chemical bonds by capturing electrons from the catalyst.Our work furnishes fundamental insight into the activation of small molecules on defect-rich surfaces of ternary compound catalysts. | Kang Xu Liang Wang Haifeng Feng Zhongfei Xu Jincheng Zhuang Yi Du Feng Pan Weichang Hao | 2021 | Journal of Materials Science & Technology2021，，18： | 0 |
| 15 | Preparation and Characterization of Nanosized Titania Sensing Film显示文摘Nanosized titania sensing films were prepared by sol-gel process and the microstructure was characterized. Influence of various factors on the morphologies of the films were studied in details.In order to obtain films with high surface area,Y^(3+),Ce^(3+) and Fe^(3+) were doped in the titania sol.Also titania sol was dispersed in a polymeric solution to get nanosized and porous films.Scanning electron microscope (SEM),atom force microscope (AFM),and x-ray diffraction (XRD) were used to characterize the titania films.SEM,AFM figures indicated that the grain size decreased from about 150 nm to 20 nm when the concentration of additions changed from 0 at% to 55 at% and the film was porous with the grain size less than 30 nm when the titania sol was dispersed in a polymeric solution even when the calcination temperature increased up to 850℃. | Ximing Wang Junying Zhang Feng Pan Weichang Hao Tianmin Wang | 2006 | 稀有金属材料与工程2006，35，A03： | 0 |
| 16 | Tuning the performance of nitrogen reduction reaction by balancing the reactivity of N_(2) and the desorption of NH_(3)显示文摘Electrochemical reduction of nitrogen to ammonia under mild conditions provides an intriguing approach for energy conversion. A grand challenge for electrochemical nitrogen reduction reaction (NRR) is to design a superior electrocatalyst to obtain high performance including high catalytic activity and selectivity. In the NRR process, the three most important steps are nitrogen adsorption, nitrogen activation, and ammonia desorption. We take MoS_(2) as the research object and obtain catalysts with different electronic densities of states through the doping of Fe and V, respectively. Using a combination of experiments and theoretical calculations, it is demonstrated that V-doped MoS_(2) (MoS_(2)-V) shows better nitrogen adsorption and activation, while Fe-doped MoS_(2) (MoS_(2)-Fe) obtains the highest ammonia yield in experiments (20.11 µg·h^(−1)·mg^(−1)cat.) due to its easier desorption of ammonia. Therefore, an appropriate balance between nitrogen adsorption, nitrogen activation, and ammonia desorption should be achieved to obtain highly efficient NRR electrocatalysts. | Lijuan Niu Dandan Wang Kang Xu Weichang Hao Li An Zhenhui Kang Zaicheng Sun | 2021 | Nano Research2021，14，11： | 0 |
| 17 | Bladder microenvironment actuated proteomotors with ammonia amplification for enhanced cancer treatment显示文摘Enzyme-driven micro/nanomotors consuming in situ chemical fuels have attracted lots of attention for biomedical applications.However,motor systems composed by organism-derived organics that maximize the therapeutic efficacy of enzymatic products remain challenging.Herein,swimming proteomotors based on biocompatible urease and human serum albumin are constructed for enhanced antitumor therapy via active motion and ammonia amplification.By decomposing urea into carbon dioxide and ammonia,the designed proteomotors are endowed with self-propulsive capability,which leads to improved internalization and enhanced penetration in vitro.As a glutamine synthetase inhibitor,the loaded L-methionine sulfoximine further prevents the conversion of toxic ammonia into non-toxic glutamine in both tumor and stromal cells,resulting in local ammonia amplification.After intravesical instillation,the proteomotors achieve longer bladder retention and thus significantly inhibit the growth of orthotopic bladder tumor in vivo without adverse effects.We envision that the as-developed swimming proteomotors with amplification of the product toxicity may be a potential platform for active cancer treatment. | Hao Tian Juanfeng Ou Yong Wang Jia Sun Junbin Gao Yicheng Ye Ruotian Zhang Bin Chen Fei Wang Weichang Huang Huaan Li Lu Liu Chuxiao Shao Zhili Xu Fei Peng Yingfeng Tu | 2023 | Acta Pharmaceutica Sinica B2023，13，9： | 0 |
| 18 | 射频磁控溅射制备TiO_2光催化薄膜的表征(英文)显示文摘在不同的Ar和O2气流量比下,利用射频磁控溅射技术在载波片上制备了TiO2薄膜。利用X射线衍射(XRD),原子力显微镜(AFM),拉曼光谱和UV-VIS-NIR分光光度计等技术对薄膜进行了表征。结果表明在ArO2=20sccm5sccm下制备的薄膜具有较高的光催化活性。 | 郑树凯 郝维昌 潘峰 张俊英 王天民 Zheng Shukai Hao Weichang Pan Feng Zheng Junyeng Wang Tianmin | 2004 | 稀有金属材料与工程2004，33，7： | 0 |
| 19 | Responding Depth of Photocatalytic Activity of TiO_2 Self-assembled Films显示文摘The electrostatically self-assembly method is getting strategically important to prepare multilayer thin films. With careful choice of component materials, this method should allow for the preparation of multilayer thin films with a variety of excellent technological properties. TiO2/PSS multilayer thin films with ordered structure were prepared by electrostatic self-assembly method. UV-Vis-NIR spectrophotometer, X-ray photoelectron spectroscopy (XPS),and atom force microscopy (AFM) were used to characterize the structure and performance of the multilayer films.Because electrostatically self-assembly method allows molecular-level control over the film composition and thickness,this paper studied the responding depth of photocatalytic activity of TiO2 self-assembled films in detail. | Weichang HAO, Feng PAN, Tianmin WANG and Shukai ZHENG)Center of Materials Physics and Chemistry, School of Science, Beijing University of Aeronautics and Astronautics, Beijing 100083, ChinaDepartment of Materials Science, Lanzhou University, Lanzhou 730000, China | 2004 | Journal of Materials Science & Technology2004，20，4： | 0 |
| 20 | Fabrication and Wettability of ZnO Nanorod Array显示文摘ZnO nanorod arrays were prepared in an open system by using a simple aqueous solution method. Spindle-like, wimble-like, tower-like and hexagonal rod-like ZnO rods were obtained under different conditions. ZnO nanorod arrays with different morphology and size were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and contact angle measurement (CAM). The size of ordered zinc oxide rods can be controlled by temperature of water bath, because this temperature can influences growing speeds in different crystal directions. Some additives, such as urea and thiourea, were introduced into reaction solution to improve quality of arrays. Surface character of ZnO nanorod arrays can be changed from hydrophilic to hydrophobic, which was proved to be dependence on size of air grooves on surface. | Meng Sun Yi Du Weichang Hao Huaizhe Xu Youxing Yu Tianmin Wang | 2009 | Journal of Materials Science & Technology2009，25，1： | 0 |
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