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Flower-like Bi_2WO_6/ZnO composite with excellent photocatalytic capability under visible light irradiation

Chinese Journal of Catalysis 2018年第4期39卷 810-820页

作者： Juan Cheng Yi Shen Kuan Chen Xi Wang Yongfu Guo Xiaoji Zhou renbi bai Center for Separation and Purification Materials&Technologies Suzhou University of Science and TechnologySuzhou 215009JiangsuChina Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material Suzhou 215009JiangsuChina

The photocatalytic ability of ZnO is improved through the addition of flower‐like Bi2WO6 to prepare a Bi2WO6/ZnO composite with visible light *** composite is characterized by X‐ray diffraction,transmission electron microscopy,scanning electron microscopy with UV–vis diffuse reflectance spectroscopy,X‐ray photoelectron spectroscopy and N2 adsorption‐desorption *** modification,the band gap energy of Bi2WO6/ZnO is reduced from 3.2 eV for ZnO to 2.6 *** visible light irradiation,the Bi2WO6/ZnO composite shows an excellent photocatalytic activity for degrading methylene blue(MB)and *** photo‐degradation efficiencies of(0.3:1)Bi2WO6/ZnO for MB and tetracycline are approximately 246 and 4500 times higher than those of bare ZnO,respectively,and correspondingly,the photo‐degradation rates for the two pollutants are approximately 120 and 200 times higher than those with bare ZnO,***,the photocatalyst of(0.3:1)Bi2WO6/ZnO exhibits a higher transient photocurrent density of approximately 4.5μA compared with those of bare Bi2WO6 and ZnO *** successful recombination of Bi2WO6 and ZnO enhances the photocatalytic activity and reduces the band gap energy of ZnO,which can be attributed to the effective separation of electron–hole *** species trapping experiments display that[O2]-is the major species involved during photocatalysis rather than·OH and h+.This study provides insight into designing a meaningful visible‐light‐driven photocatalyst for environmental remediation.

关键词： Bismuth tungstate Zinc oxide Photocatalysis Methylene blue Antibiotics

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Synthesis of novel p-n heterojunction m-Bi_2O_4/BiOCl nanocomposite with excellent photocatalytic activity through ion-etching method

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Chinese Journal of Catalysis 2018年第11期39卷 1792-1803页

作者： Junxiu Wang Zhenzong Zhang Xi Wang Yi Shen Yongfu Guo Po Keung Wong renbi bai Center for Separation and Purification Materials&Technologies Suzhou University of Science and TechnologySuzhou 215009JiangsuChina School of Life Science The Chinese University of Hong KongShatinHong KongChina

A novel p‐n heterostructure photocatalyst m‐Bi2O4/BiOCl was successfully synthetized through a facile ion‐etching *** adjusting the added volume of HCl solution,a series of different ratios of composite photocatalysts were *** as‐prepared samples of physical,chemical and optical characteristics were examined by X‐ray diffraction,scanning electron microscope,transmission electron microscope,energy dispersive X‐ray spectroscopy,selected‐area electron diffraction,Fourier transform infrared absorption,Raman microscope,N2 adsorption‐desorption,X‐ray photoelectron spectroscopy and UV‐vis spectrum *** photocatalysts showed high degradation rate and complete mineralization ability for methyl orange and tetracycline solution under visible *** reaction rate constant of m‐Bi2O4/BiOCl for methyl orange was 52.28 times higher than that of *** characterization presented a good stability of ***,the photocurrent response test certified that the heterostructure effectively accelerated the separation and migration of photo‐generated *** scavenger experiments evidenced that hole(h+)and superoxide radical(?O2?)were the primary active radicals.A possible photocatalytic mechanism was *** work provided an alternative photocatalyst applied to water environmental remediation.

关键词： Dibismuth tetroxide Photocatalysis Methylene orange Tetracycline Degradation mechanism

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Identity-based searchable attribute signcryption in lattice for a blockchain-based medical system

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Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 461-471页

作者： Huifang YU Xiaoping bai School of Cyberspace Security Xi'an University of Posts&TelecommunicationsXi'an 710121China School of Information Engineering Qinghai Communications Technical CollegeXining 810003China

Electronic healthcare systems can offer convenience but face the risk of data forgery and information *** solve these issues,we propose an identity-based searchable attribute signcryption in lattice for a blockchain-based medical system(BCMS-LIDSASC).BCMS-LIDSASC achieves decentralization and anti-quantum security in the blockchain environment,and provides fine-grained access control and ***,smart contracts are used to replace traditional trusted third parties,and the interplanetary file system(IPFS)is used for ciphertext storage to alleviate storage pressure on the *** to other schemes,BCMS-LIDSASC requires smaller key size and less storage,and has lower computation *** contributes to secure and efficient management of medical data and can protect patient privacy and ensure the integrity of electronic healthcare systems.

关键词： Blockchain Identity-based searchable attribute signcryption Distributed storage NTRU lattice

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A novel efficient energy absorber with free inversion of a metal foam-filled circular tube

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Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 1-14页

作者： Jianxun ZHANG Jinwen bai State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi'an Jiaotong UniversityXi'an 710049China

In this paper, a novel efficient energy absorber with free inversion of a metal foam-filled circular tube(MFFCT) is designed, and the axial compressive behavior of the MFFCT under free inversion is studied analytically and numerically. The theoretical analysis reveals that the energy is mainly dissipated through the radial bending of the metal circular tube, the circumferential expansion of the metal circular tube, and the metal filled-foam compression. The principle of energy conservation is used to derive the theoretical formula for the minimum compressive force of the MFFCT over free inversion under axial loading. Furthermore, the free inversion deformation characteristics of the MFFCT are analyzed numerically. The theoretical steady values are found to be in good agreement with the results of the finite element(FE) analysis. The effects of the average diameter of the metal tube, the wall thickness of the metal tube, and the filled-foam strength on the free inversion deformation of the MFFCT are considered. It is observed that in the steady deformation stage, the load-carrying and energy-absorbing capacities of the MFFCT increase with the increase in the average diameter of the metal tube, the wall thickness of the metal tube, or the filled-foam strength. The specific energy absorption(SEA) of free inversion of the MFFCT is significantly higher than that of the metal tube alone.

关键词： metal foam-filled circular tube(MFFCT) free inversion load-carrying capacity energy absorption

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光催化-膜分离耦合技术的水处理应用研究进展

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水处理技术 2014年第12期40卷 11-18页

作者：费锡智杨晶晶白仁碧苏州科技学院分离净化材料与技术研发中心苏州科技学院环境科学与工程学院江苏省环境科学与工程重点实验室江苏苏州215009

介绍光催化-膜分离耦合工艺,它是在传统光催化技术中粉末催化剂难分离回收和废水处理后水质不够理想的基础上进行研发的。总结了不同构型的光催化膜反应器的特点及其存在的局限性,并简述了新型光催化膜反应器工艺运行时需考虑的因素。... 详细信息

介绍光催化-膜分离耦合工艺,它是在传统光催化技术中粉末催化剂难分离回收和废水处理后水质不够理想的基础上进行研发的。总结了不同构型的光催化膜反应器的特点及其存在的局限性,并简述了新型光催化膜反应器工艺运行时需考虑的因素。分析表明悬浮型光催化膜反应器的光催化效率明显高于负载型光催化膜反应器;针对悬浮式光催化膜反应器面临的由压力驱动引起的高能量输入和膜污染问题,指出光催化与渗透气化或膜蒸馏联用工艺所具有的独特优势。认为光催化/膜分离耦合工艺在水处理领域具有重要前景,今后研究应集中在高活性光催化剂的开发、高抗氧化性和耐污染的膜制备及光催化膜反应器结构的优化上。

关键词：光催化氧化技术膜分离技术光催化-膜反应器

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Use of induced pluripotent stem cell-derived brain cells,organoids,assembloids,and blood-brain barrier models in understanding alcohol and anesthetic-induced brain injuries:an emerging perspective

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Neural Regeneration Research 2024年第5期19卷 953-954页

作者： Xiaowen bai Department of Cell Biology Neurobiology&AnatomyMedical College of WisconsinMilwaukeeWIUSA

Neurological disorders,including developmental disorders,Alzheimer’s disease(AD),and psychiatric conditions,have significant social and economic impacts *** extensive research into the underlying mechanisms of these disorders,effective treatments remain elusive,partly due to the complexity of the brain,the limited availability of human brain tissue,and the blood-brain barrier(BBB)’s impermeability to certain *** perspective article discusses the potential of human induced pluripotent stem cell(iPSC)-based models of brain cells,organoids,assembloids,and BBB to advance our understanding of the etiology,progression,and mechanisms of brain injuries induced by alcohol consumption and general *** models could also be used to develop protective and therapeutic approaches.

关键词： injuries protective drugs

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改良型倒置A^2/O生物膜工艺的脱氮除磷性能研究

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水处理技术 2015年第3期41卷 76-80,85页

作者：梁柱郭永福吴伟白仁碧苏州科技学院分离净化材料与技术研发中心江苏苏州215011 江苏省环境科学与工程重点实验室江苏苏州215011 江苏省环境科学研究院江苏南京210029

通过在倒置A2/O工艺中增设填料,并对其污泥及硝化液回流方式进行变化后,得到兼具脱氮除磷功能与生物膜特点的改良型倒置A2/O生物膜工艺,并以实际生活污水为处理对象考察了工艺的脱氮除磷性能。结果表明,系统采用硝化液回流与污泥回流分... 详细信息

通过在倒置A2/O工艺中增设填料,并对其污泥及硝化液回流方式进行变化后,得到兼具脱氮除磷功能与生物膜特点的改良型倒置A2/O生物膜工艺,并以实际生活污水为处理对象考察了工艺的脱氮除磷性能。结果表明,系统采用硝化液回流与污泥回流分离的方式,并增设组合填料与火山岩后,有助于提升系统的脱氮除磷性能,增强系统的稳定性。当DO质量浓度维持在2.0 mg/L和硝化液体积回流比为200%的条件下,系统对COD、NH4+-N、TN及TP的去除率分别可达84.9%、92.8%、70.9%和75.3%。DO质量浓度及硝化液回流比对系统的脱氮除磷性能有较大影响。

关键词：倒置A2/O工艺脱氮除磷硝化反硝化

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聚合物负载铁-锰双金属氧化物去除水中锑的研究

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化工新型材料 2023年第4期51卷 231-237页

作者：贾祥苓闵奇白仁碧杨晶晶苏州科技大学环境科学与工程学院苏州215009

针对载铁壳聚糖醋酸纤维素吸附剂(CS/CA-FeO_(x))易受pH影响问题,选择向制备液中引入Mn^(2+)制备复合吸附剂CS/CA-FeMnO_(x),并研究其对水溶液中Sb(Ⅲ)和Sb(Ⅴ)的去除特性及吸附机理。结果表明:在pH=4.0条件下CS/CA-FeMnO_(x)对初始浓度... 详细信息

针对载铁壳聚糖醋酸纤维素吸附剂(CS/CA-FeO_(x))易受pH影响问题,选择向制备液中引入Mn^(2+)制备复合吸附剂CS/CA-FeMnO_(x),并研究其对水溶液中Sb(Ⅲ)和Sb(Ⅴ)的去除特性及吸附机理。结果表明:在pH=4.0条件下CS/CA-FeMnO_(x)对初始浓度为5mg/L的Sb(Ⅲ)和Sb(Ⅴ)吸附的最佳投量均为1.2g/L,最大吸附容量为44.42mg/g和56.73mg/g;pH从4.0升高至7.0,对Sb(Ⅲ)的去除率影响不大,但是对Sb(Ⅴ)的去除率影响显著降低,去除率下降25.3%;准二级速率反应方程更能准确地描述吸附剂CS/CA-FeMnO_(x)对Sb(Ⅲ)和Sb(Ⅴ)的吸附过程,说明对二者的吸附均是物理吸附与化学吸附相结合的过程;Freundlich模型能更好地描述CS/CA-FeMnO_(x)对两种不同形态锑的吸附;X射线衍射结果未显示锰氧化物的峰,可能是复合吸附剂中锰含量较少或者锰以无定形存在。X射线光电子能谱和分峰结果显示,水中锑与复合吸附剂上的金属发生结合,且Sb(Ⅴ)的结合强度高于Sb(Ⅲ)。综上,少量锰的添加能够显著削弱pH对去除Sb(Ⅴ)的影响,为构建静电富集、化学吸附的除锑体系提供技术依据。

关键词：锑双金属氧化物原位改性吸附

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Magnetic and electrical transport study of the intrinsic magnetic topological insulator MnBi_(2)Te_(4)with Ge doping

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Frontiers of physics 2024年第3期19卷 51-59页

作者： Qingwang bai Mingxiang Xu School of Physics Southeast UniversityNanjing 211189China

As an intrinsic magnetic topological insulator with magnetic order and non-trivial topological structure,MnBi_(2)Te_(4)is an ideal material for studying exotic topological states such as quantum anomalous Hall effect and topological axion insulating ***,we carry out magnetic and electrical transport measurements on(Mn1–xGex)Bi_(2)Te_(4)(x=0,0.15,0.30,0.45,0.60,and 0.75)single *** is found that with increasing x,the dilution of magnetic moments gradually weakens the antiferromagnetic exchange ***,Ge doping reduces the critical field of ferromagnetic ordering,which may provide a possible way to implement the quantum anomalous Hall effect at lower magnetic *** transport measurements suggest that electrons are the dominant charge carriers,and the carrier density increases with the Ge doping ***,the Kondo effect is observed in the samples with x=0.45,0.60,and *** results suggest that doping germanium is a viable way to tune the magnetic and electrical transport properties of MnBi_(2)Te_(4),opening up the possibility of future applications in magnetic topological insulators.

关键词： MnBi_(2)Te_(4) intrinsic magnetic topological insulator transition points Kondo effect

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金属有机框架改性膜在废水处理中的应用进展

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功能材料 2022年第4期53卷 4028-4038页

作者：李红林沈舒苏吴逸张干伟白仁碧苏州科技大学环境科学与工程学院江苏苏州215009 江苏省分离净化材料与技术工程研究中心江苏苏州215009

金属有机框架(MOFs)是具有多孔纳米结构的新型膜改性材料,因其复杂的几何形状、可调节的窗口尺寸、高的孔隙率以及优异的水热稳定性等特性,被广泛应用于废水处理,如水处理膜技术。本文以几种常用的MOFs纳米粒子为主,简述了MOFs独特的结... 详细信息

金属有机框架(MOFs)是具有多孔纳米结构的新型膜改性材料,因其复杂的几何形状、可调节的窗口尺寸、高的孔隙率以及优异的水热稳定性等特性,被广泛应用于废水处理,如水处理膜技术。本文以几种常用的MOFs纳米粒子为主,简述了MOFs独特的结构特点。介绍了MOFs改性膜在不同废水处理领域的最新应用进展,以不同MOFs纳米粒子改性膜的制备方法、分离效果和可能的分离机制等方面,分析了其在脱盐、重金属去除、染料去除和油/水分离等领域的重要作用。提出了MOFs改性膜在废水处理领域仍需解决的关键问题,并对MOFs改性膜的未来研究进行了展望。

关键词：金属有机框架膜改性膜分离废水处理应用

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