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Significantly enhanced piezo-photocatalytic capability in BaTiO_(3) nanowires for degrading organic dye

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Journal of Materiomics 2020年第2期6卷 256-262页

作者： Xiaofang Liu Longyin Xiao Yong Zhang huajun sun School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan430070China State Key Laboratory of Silicate Materials for Architectures Center for Smart Materials and Device IntegrationSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Advanced Ceramics Institute of Zibo New&High-Tech Industrial Development Zone Zibo255000China

Over the last several years,piezo-photocatalytic effect was intensively investigated for a facile,effective and promising protocol to sewage treatment and environmental *** research on the integration of piezocatalytic and photocatalytic process on lead-free ferroelectric materials is highly demanded to further push this field *** this work,BaTiO_(3) nanowires(BT NWs)were fabricated by a two-step hydrothermal *** degradation of organic dye(methyl orange,MO)aqueous solution(5 mg L^(-1))by integrating photocatalysis with the piezoelectric-like effect under UV light radiation and ultrasonic vibration was *** decomposition ratio reaches up to ~98.17%(at 80 min),which is around 1.28 and 2.24 times of the sole piezocatalysis and photocatalysis process,*** intermediate product of hydroxyl radical(·OH)and superoxide radical(·O_(2)^(-))was detected and quantified by radical trapping experiments,to illustrating their key role in degrading MO *** addition,we carried out sequential cycles to evaluate the cycling stability and usage durability of catalysts and a reduction of ~15% in the efficiency was observed after four *** work provides a promising paradigm for the further development of piezo-photocatalytic materials and target applications in environmental field.

关键词： Hydrothermal BaTiO_(3) Piezo-photocatalytic Piezoelectric potential Catalysis

Construction of direct Z-scheme BPQDs-modified BiOBr thin film for enhanced photocatalytic performance under visible light irradiation

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Journal of Materiomics 2021年第5期7卷 1122-1130页

作者： Ziyu Yao huajun sun Yunlong Hu Xiaofang Liu Yong Zhang State Key Laboratory of Silicate Materials for Architectures Center for Smart Materials and Device IntegrationSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan430070China Advanced Ceramics Institute of Zibo New&High-Tech Industrial Development Zone Zibo255000China

Surface modification on photocatalytic thin films is long considered as an effective strategy to improve the degradation performance,which in turn helps to alleviate the worldwide environmental pollution *** this study,a direct Z-scheme photocatalytic system is constructed successfully by integrating black phosphorus quantum dots(BPQDs)on the surface of BiOBr thin film prepared by hydrothermal *** optimal BPQDs/BiOBr-1 thin film presents remarkable enhanced photocatalytic activity for degrading methyl violet(MV)and tetracycline hydrochloride(TC),which is 3 and 3.65 times higher than that of pure BiOBr *** active species involved in the reaction are ^(+),·O_(2)^(-),and·OH,which determined by radical trapping *** formation of direct Z-scheme photocatalytic system makes electrons assembled in the conduction band(CB)of BPQDs and holes gathered in the valence band(VB)of BiOBr,which supports the generation of h^(+) and·O_(2)^(-) and in turn accelerates the photocatalytic ***,the improved efficiency of charge separation,enhanced visible light absorption and enlarged specific surface area also contributed to the enhanced photocatalytic performance of BPQDs/*** work provides a feasible strategy for optimizing photocatalytic thin films via detailed analyzing the role of BPQDs in the construction of direct Z-scheme photocatalysts.

关键词： Photocatalytic thin films Direct Z-scheme Surface modification BPQDs BiOBr

Effect of rare earth cerium on brittleness of simulated welding heat-affected zones in a reactor pressure vessel steel

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Journal of Rare Earths 2015年第11期33卷 1204-1211页

作者：宋申华孙华骏王萌 Department of Materials Science and Engineering Shenzhen Graduate School Harbin Institute of Technology

The welding coarse-grained heat-affected zones（CGHAZs） in the undoped and Ce-doped samples of SA508CL-3 reactor pressure vessel steel were simulated using a Gleeble 1500 D thermomechanical simulator with a peak temperature of 1320 oC at the heat inputs of 30, 50 and 100 kJ /cm, respectively. The ductile-to-brittle transition temperature（DBTT） of the simulated CGHAZs was evaluated along with microstructural and microchemical characterizations. The results indicated that Ce could substantially lower the DBTT of the CGHAZs by its microstructural and microchemical effects. After the thermal cycling of welding, the microstructure in the Ce-doped samples was apparently finer than that in the undoped samples, regardless of the lath bainite obtained at the heat inputs of 30 and 50 kJ /cm or the granular bainite acquired at the heat input of 100 kJ /cm, leading to lower DBTTs for the Ce-doped samples. Moreover, grain boundary segregation of Ce occurred apparently in the Ce-doped samples and exhibited a non-equilibrium characteristic. The segregation of Ce could play an important role in lowering the DBTT of CGHAZs or toughening the CGHAZs.

关键词： grain boundaries non-equilibrium segregation rare earths embrittlement pressure vessel steel

Reconfigurable and polarization-dependent optical filtering for transflective full-color generation utilizing low-loss phase-change materials

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Journal of Semiconductors 2024年第7期45卷 46-53页

作者： Shuo Deng Mengxi Cui Jingru Jiang Chuang Wang Zengguang Cheng huajun sun Ming Xu Hao Tong Qiang He Xiangshui Miao School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074China Hubei Yangtze Memory Laboratories Wuhan 430205China School of Microelectronics Fudan UniversityShanghai 200433China

All-dielectric metasurface, which features low optical absorptance and high resolution, is becoming a promising candidate for full-color generation. However, the optical response of current metamaterials is fixed and lacks active tuning. In this work, we demonstrate a reconfigurable and polarization-dependent active color generation technique by incorporating low-loss phase change materials(PCMs) and CaF_2 all-dielectric substrate. Based on the strong Mie resonance effect and low optical absorption structure, a transflective, full-color with high color purity and gamut value is achieved. The spectrum can be dynamically manipulated by changing either the polarization of incident light or the PCM state. High transmittance and reflectance can be simultaneously achieved by using low-loss PCMs and substrate. The novel active metasurfaces can bring new inspiration in the areas of optical encryption, anti-counterfeiting, and display technologies.

关键词： structural color reconfigurable all-dielectric metasurfaces phase change material

Piezoelectric ceramics with high piezoelectricity and broad temperature usage range

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Journal of Materiomics 2021年第4期7卷 683-692页

作者： Qinghu Guo Fei Li Fangquan Xia Pengbin Wang Xiaoyi Gao Hua Hao Hanxing Liu huajun sun Shujun Zhang State Key Laboratory Silicate Materials for Architectures Center for Smart Materials and Device IntegrationSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationXi’an Jiaotong UniversityXi’an710049China School of Chemistry and Chemical Engineering University of JinanJinan250022China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNew South Wales2500Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China

There is a general observation that the Curie temperature and piezoelectric property of the ferroelectric ceramics can be enhanced only at the expense of each other,i.e.,higher piezoelectricity,lower Curie temperature,thus,limits their applications over broad temperature *** this research,Sm-modified 0.15 Pb(Mg_(1/3)Nb_(2/3))O_(3)-(0.85-x)PbZrO_(3)-xPbTiO_(3) ceramics have been studied,where excellent piezoelectric coefficients d33¼720 pC/N,d_(33)*=950 pm/V and high Curie temperature T_(C)=293℃ were simultaneously achieved for x=0.42 composition by designing the morphotropic phase boundary(MPB)with local structural *** particular significance is that a high thermal stability was observed with piezoelectric variation below 20%with temperature up to 280℃,demonstrating that the x=0.42 composition is a good candidate for piezoelectric application over broad temperature range where high temperature stability is *** work provides a good paradigm for designing highperformance piezoelectric ceramics with high thermal stability via a combination of MPB and local structural heterogeneity.

关键词： Piezoelectric ceramics Local structural heterogeneity Electromechanical response Thermal stability

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红树莓生物活性成分及功效研究进展

食品科学 2025年第2期46卷 268-279页

作者：孙华军崔方正刘盈朱思静李跃黑龙江八一农垦大学食品学院黑龙江大庆163319

红树莓是蔷薇科悬钩子属果树,红树莓的果实、叶片、种子等部位富含多糖、黄酮类和酚类化合物等生物活性物质,具有提高免疫力、预防心血管疾病、抑制癌细胞生长等多种健康功效,是具有商业应用价值和药物研究价值的“黄金水果”。本文全... 详细信息

红树莓是蔷薇科悬钩子属果树,红树莓的果实、叶片、种子等部位富含多糖、黄酮类和酚类化合物等生物活性物质,具有提高免疫力、预防心血管疾病、抑制癌细胞生长等多种健康功效,是具有商业应用价值和药物研究价值的“黄金水果”。本文全面综述红树莓不同品种、采收期、组织部位的营养成分及含量,系统阐述红树莓不同部位在抗氧化、抗炎、抗菌、抗癌、改善代谢综合征等方面的功效和作用机制以及应用,以期为红树莓的功效研究、高值化利用和精深加工研究提供参考。

关键词：红树莓生物活性物质资源开发加工利用

Robust superamphiphobic coatings with gradient and hierarchical architecture and excellent anti-flashover performances

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Nano Research 2022年第8期15卷 7565-7576页

作者： Yi Xie Wei Xiong Shefiu Kareem Chuxiong Qiu Yongfei Hu Ivan PParkin Shengwu Wang Huayun Wang Junwu Chen Lee Li Zhi Chen huajun sun Xiujian Zhao State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Department of Chemistry University College LondonLondon WC1H 0AJUK State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science&Technology) Wuhan 430074China State Grid Jiangxi Electric Power CompanyLtd.Electric Power Research InstituteNanchang 330096China Wuhan Shuneng New Material Co. LTDWuhan 430074China

Biomimetic superhydrophobic(SH)coatings have emerged as a promising alternative to traditional room temperature vulcanizing(RTV)silicone rubber coatings for improving the flashover strength of ***,organic contamination occurs in outdoor applications and thus a superamphiphobic(SAP)surface is more desirable but not yet reported for improving flashover ***,we developed a novel anti-flashover technique by fabricating robust SAP coating with unique gradient and micro-nanoscale hierarchical *** SAP coating was fabricated by sequentially spray-depositing a resin-based primer and a silica-based topcoat on substrates(i.e.,glass slides and insulators).The primer not only functions as an adhesive offering strong adhesion to the substrate but also offers a micromastoid-like structure facilitating the subsequent formation of hierarchical *** appropriate spraying pressure leads to a diffusion of the fluorocarbon-modified silica nanoparticles into the primer to form a unique gradient structure,by analogy to inserting bullets into a *** features render the SAP coating excellent robustness with strong abrasive resistance,excellent ultraviolet(UV)resistance,and excellent chemical and thermal *** flashover property of the SAP coating was explored and compared with that of SH and RTV specimens,from which a novel organic-contamination model to evaluate the flashover performance was *** coated SAP glass insulator demonstrated 42.9%pollution flashover voltage improvement than RTV-coated *** stated unique features reveal the convincing potential of the present SAP coatings to be applied for not only outdoor transmission line insulators for antiflashover but also other fields for self-cleaning,anti-fouling,and anti-icing.

关键词： superamphiphobic coatings superhydrophobic coatings insulator pollution flashover voltage anti-flashover

锰锑酸铅-锌铌酸铅-锆钛酸铅陶瓷的压电性能

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硅酸盐学报 2006年第3期34卷 289-292页

作者：周静孙华君陈文武汉理工大学材料科学与工程学院材料复合新技术国家重点实验室武汉430070

以同时位于准同型相界的Pb(Mn1/3Sb2/3)0.05(Zr1/2Ti1/2)0.95O3(PMnS PZT)与Pb(Zn1/3Nb2/3)0.28(Zr1/2Ti1/2)0.72O3(PZN PZT)组合而成的xPb(Mn1/3Sb2/3)0.05(Zr1/2Ti1/2)0.95O3(1-x)Pb(Zn1/3Nb2/3)0.28(Zr1/2Ti1/2)0.72O3[xPMnS(1-x)PZN]四元系压电陶瓷为研究对象,研究了PZN和PMnS含量的变化对xPMnS(1-x)PZN材料结构与性能的影响,制备了具有高性能的四元系xPMnS(1-x)PZN陶瓷材料。结果表明性能最好的组成位于准同型相界附近靠近四方相含量较高的区域。Ba2+,Sr2+取代显著提高了材料的压电性能,Ba2+取代0.5PMnS0.5PZN的性能为压电系数d33=406pC/N,机电耦合系数kp=0.55,介电常数ε3T3/ε0=2183,机械品质因数Qm=1077和介电损耗tanδ=2.7%;Sr2+取代0.6PMnS0.4PZN的性能为d33=438pC/N,kp=0.55,ε3T3/ε0=2701,Qm=1073和tanδ=3.3%。

关键词：锰锑酸铅-锌铌酸铅-锆钛酸铅陶瓷准同型相区间结构压电性能钡锶取代

政府信息公开与数据开放的关联及治理逻辑辨析——基于“政府-市场-社会”关系变迁视角

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中国行政管理 2021年第2期 31-39页

作者：胡业飞孙华俊天津大学公共管理学院天津300072

政府数据开放工作正在我国蓬勃发展,但公共管理实践界发出的两大问题,即"政府信息公开与数据开放为何种关系"、"传统信息公开领域如何开展数据开放工作",依然未得到学术界的充分解答。本文认为,回答上述问题,须从公共产品供给领域"政府... 详细信息

政府数据开放工作正在我国蓬勃发展,但公共管理实践界发出的两大问题,即"政府信息公开与数据开放为何种关系"、"传统信息公开领域如何开展数据开放工作",依然未得到学术界的充分解答。本文认为,回答上述问题,须从公共产品供给领域"政府-市场-社会"关系变迁视角出发,辨析政府信息公开与数据开放的治理逻辑差异,并构建对二者关系的清晰解释。本文提出,信息公开与数据开放的关系为"形式相同但功能各有偏重"。即,二者本质上都是政府对外发布信息(数据)的信息服务形式,同时包含"保障知情权"与"促进信息/数据的利用"这两重目标。不过,在政府信息公开的治理逻辑中,保障公民知情权是其首要目标;在政府数据开放的治理逻辑中,促进公共数据开发利用才是其首要目标,政府通过扮演"数据要素供应方"这一新角色,响应"政府-市场-社会"关系变迁,实现公共产品的合作供给以及数据经济价值的释放。首要目标上的差异也决定了二者须匹配以不同的信息(数据)发布格式。以上述分析为基础,本文进一步提出,可将政府数据开放整合进入传统政府信息公开领域,形成信息公开与数据开放"并行运作"的双路径模式。

关键词：政府数据开放政府信息公开 “政府-市场-社会”关系