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Enhanced charge separation by incomplete calcination modified co-doped TiO_(2)nanoparticle for isothiazolinone photocatalytic degradation

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Nano Research 2024年第6期17卷 4834-4843页

作者： Zhiren Guo Xiao zhang Xinyuan Li Chang Cui Zilei zhang Hansheng Li dongxiang zhang Jinying Li Xiyan Xu Jiatao zhang School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 102488China Department of Chemistry MSU-BIT UniversityShenzhen 517182Chin

Photocatalytic oxidation techniques are promising for degradation of the highly ecotoxic and refractory isothiazolinone bactericides in relevant industrial wastewaters.However,low charge separation and directional transport efficiency under solar light radiation restrain their practical application.Here,we report a nanostructured photocatalyst doped with Gd and B in TiO_(2)with carbon incorporation and defect formation through incomplete calcination.The specific surface area,grain size,and hydrophilicity of TiO_(2)are improved,which is beneficial for the interfacial reaction between the photocatalyst and pollutants.The reduction of the bandgap,the broadening of the photo-absorption range,and the retarded electron-hole recombination promote the photocatalytic performance due to the improved oxygen vacancies based on the electron distribution modification.The difference in partial density of states(ΔPDOS)between the current catalyst and raw TiO_(2)indicates that the co-doping of Gd and B with incomplete calcination changes the electronic hybridization of conduction band and valence band near the Fermi level,and affects the band gap energy.It improved charge separation and directional transport efficiency and benefited the formation of main active species,including•OH and O_(2)•−,for the pollutant decomposition.The rate of photocatalytic removal of benzisothiazolinone(BIT)by the current photocatalyst reaches 1.25 h^(−1),being 4.31 times that of TiO_(2).The current work offers a constructive approach to the design and synthesis of nanostructured photocatalysts for the photocatalytic degradation of refractory organic pollutants.

关键词： TiO_(2)nanoparticle charge separation oxygen vacancies electron distribution modification photocatalytic degradation

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Development of functional dye with redshifted absorption based on Knoevenagel condensation at 1-site in phenyl[b]-fused BODIPY

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Chinese Chemical Letters 2024年第6期35卷 349-352页

作者： Tianze Wang Junyi Ren dongxiang zhang Huan Wang Jianjun Du Xin-Dong Jiang Guiling Wang Liaoning&Shenyang Key Laboratory of Functional Dye and Pigment Shenyang University of Chemical TechnologyShenyang 110142China Department of Cell Biology China Medical UniversityShenyang 110122China State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China

Integrating ring-fused modification withπ-conjugated extension is an effective approach for designing,synthesizing,and application for novel borondipyrromethene(BODIPY)structures.In this work,based on phenyl[b]-fused BODIPY,we made reasonable modification of the methyl group at 1-site to generate dye NBDP.NBDP possessed near-infrared region(NIR)absorption and emission properties,and the intramolecular charge transfer(ICT)resulted in low fluorescence.Whereas,heat energy is evidently released in the presence of light,which can be exploited for intracellular photothermal therapy via the cell apoptosis process,reducing the inflammatory side-effects induced by necrosis.This research provides a crucial foundation for the novel molecule via BODIPY multi-directional alteration and its potential application in anti-tumor phototherapy.

关键词： NIR dyes [b]-Fused BODIPY Knoevenagel condensation Photothermal therapy Cell apoptosis

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Flexible perovskite light-emitting diodes for display applications and beyond

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Journal of Semiconductors 2024年第5期45卷 8-25页

作者： Yongqi zhang Shahbaz Ahmed Khan dongxiang Luo Guijun Li Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Huangpu Hydrogen Innovation Center/Guangzhou Key Laboratory for Clean Energy and Materials School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China

The flexible perovskite light-emitting diodes(FPeLEDs),which can be expediently integrated to portable and wearable devices,have shown great potential in various applications.The FPeLEDs inherit the unique optical properties of metal halide perovskites,such as tunable bandgap,narrow emission linewidth,high photoluminescence quantum yield,and particularly,the soft nature of lattice.At present,substantial efforts have been made for FPeLEDs with encouraging external quantum efficiency(EQE)of 24.5%.Herein,we summarize the recent progress in FPeLEDs,focusing on the strategy developed for perovskite emission layers and flexible electrodes to facilitate the optoelectrical and mechanical performance.In addition,we present relevant applications of FPeLEDs in displays and beyond.Finally,perspective toward the future development and applications of flexible PeLEDs are also discussed.

关键词： metal halide perovskite flexible light-emitting diodes optical properties mechanical flexibility display

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Research progress on rolling superlubricity in solid lubricants

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Science China Technological Sciences 2024年第7期67卷 1980-1990页

作者： LI PanPan LI HongXuan ZHU dongxiang ZHU YongQi KANG FuYan WANG Wan zhang YaXin LIU XiaoHong JI Li ZHOU HuiDi CHEN JianMin State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences School of Chemical Engineering Northwest Minzu University

Superlubricity is an ideal lubrication state where friction nearly vanishes between contact interfaces. It has become one of the most important research topics and approaches owing to its significance in reducing energy consumption and preventing device failures. As an efficient and universal lubricating principle capable of achieving superlubricity, rolling lubrication has attracted widespread attention in recent years. In this review, the theoretical concept of rolling lubrication and the experimental research progress of spherical/scroll structures are summarized. The review focuses on the possibility of achieving rolling lubrication using spherical/scroll structures(such as spherical fullerenes, carbon nanotubes, and formed and constructed spherical/scroll structures). The challenges in achieving rolling lubrication are summarized, and the possibility of molecular rolling lubrication,as well as its potential applications in superlubrication, are discussed.

关键词： spherical/scroll structure rolling lubrication superlubricity fullerene

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Near-infrared absorbing(>700 nm)aza-BODIPYs by freezing the rotation of the aryl groups

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Chinese Chemical Letters 2022年第1期33卷 115-122页

作者： Yanyan Wang dongxiang zhang Kangming Xiong Rong Shang Xin-Dong Jiang Shenyang Key Laboratory of Functional Dye and Pigment Shenyang University of Chemical TechnologyShenyang 110142China CAS Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of Chemistry Graduate School of ScienceHiroshima UniversityHigashi-Hiroshima 7398526Japan

The typical aza-BODIPYs in the dye family are known for bright fluorescence,excellent stability,and tunable absorption wavelengths.Hence,these dyes are attracting the increasing attention.Aza-BODIPYs having the maxima absorption in the near-infrared(NIR)region(650-900 nm)are very favorable for bioimaging in vivo due to the less photo-damage,deeper tissue penetration,and less interference from background auto-fluorescence by biomolecules in the living systems.Many strategies have been employed to modify the structures of the aza-BODIPY core to provide the NIR absorbing dyes.Among these,the most effective method is the fusion of the aromatic rings in aza-BODIPY system.This review allsidedly summarizes the recent development of ring-fused aza-BODIPY dyes(λ_(abs)>700 nm)focusing on the design,synthesis,and potential applications in the NIR region since 2002.

关键词： Aza-BODIPY NIR Ring-fused Red shift Freezing rotation

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Engineering J-aggregates for NIR-induced meso-CF_(3)-BODIPY nanoparticles by activated apoptosis mechanism in photothermal therapy

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中国化学快报:英文版 2023年第9期34卷 188-192页

作者： Chujing Ye Shan zhang dongxiang zhang Yue Shen Zhan Wang Huan Wang Junyi Ren Xin-Dong Jiang Jianjun Du Rong Shang Guiling Wang Liaoning&Shenyang Key Laboratory of Functional Dye and Pigment Shenyang University of Chemical TechnologyShenyang 110142China Department of Cell Biology China Medical UniversityShenyang 110122China State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 110624China Department of Chemistry Graduate School of ScienceHiroshima UniversityHigashi-Hiroshima 7398526Japan

Forming J-aggregates by organic monomer is a fascinating strategy to urge spectroscopic redshift with respect to that of the monomer.Herein,we designed 1,7-diphenyl-substituted meso–CF_(3)-BDP monomer confirmed by X-ray crystallographic analysis.The low-barrier rotation of the–CF_(3)group in meso–CF_(3)-BDP1 significantly enhances the non-radiative efficiency,and the photothermal conversion efficiency(PCE)of the self-assembled nanoparticles(1-NPs:λ_(abs)=746 nm)by J-aggregates was 82%.1-NPs could effectively block cell cycle progression,inhibit cancer cell proliferation and trigger cell apoptosis under low power laser irradiation(0.2 W/cm^(2)).This study proposes an alternate molecular design platform by J-aggregates to promote PCE through the insertion of rotating segment and trigger the cancer cells apoptosis in photothermal therapy at low power laser density.

关键词： NIR dye J-aggregate CF_(3)-BODIPY Photothermal therapy Cell apoptosis

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Stimulating and harnessing circularly polarized luminescence of helically assembled carbonized polymer dots via interfacial dynamics

聚集体(英文)

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聚集体(英文) 2023年第4期4卷 100-110页

作者： Jiaying Lin Rulin Liu Peixian Chen Yangfei Lv Junjie Hao Meijuan Chen dongxiang zhang Ruikun Pan Yiwen Li Xi Zhu Tingchao He Jiaji Cheng School of Materials Science and Engineering Hubei UniversityWuhanHubeiChina College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhenGuangdongChina School of Science and Engineering The Chinese University of Hong KongShenzhen Institute of Artificial Intelligence and Robotics for Society(AIRS)ShenzhenGuangdongChina Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhenGuangdongChina

Stimulating and harnessing circularly polarized luminescence(CPL)is not only a sine qua non for fundamentally unveiling chirogenesis in physical chemistry,but also a pivotal prerequisite for implementation of such phenomenon in research fields including chiral optoelectronics and theranostics.Herein,red-emissive carbonized polymer dots(CPDs)-based helical structures were synthesized in this work via biomolecule-tailored organic–inorganic co-assembly strategy.The surface statesrelated chirality exhibits enhanced circular dichroism(CD)and CPL activities with anisotropic factors as high as gCD,max=5.4×10^(−3) and glum,max=1.5×10^(−2),respectively.The obtained CPL signals can be further manipulated in an excitationdependent manner,indicating that a synergistic-competition phenomenon exists between configurational chirality and intermolecular energy-transfer dynamics,which is further supported by simulations based on density function theory(DFT).Such tunable CPL behavior triggers revolutionary designs and applications of these chiral CPDs into the realm of chirality-related biological issues and next-generation chiral optoelectronics.

关键词： carbonized polymer dots circular dichroism circularly polarized luminescence organic-inorganic coassembly synergistic-competition

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居民公约与基层治理融合的内在机理与实现路径

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未来与发展 2024年第5期48卷 55-61页

作者：张栋祥山东师范大学法学院山东济南250358

当前我国基层治理正面临结构性的冲击和价值理念的挑战,需要积极寻求新的价值理念传递方式及探索多元化治理的协同机制。居民公约作为有效整合传统智慧与现代治理形式的纽带,可以在基层治理的转型中发挥至关重要的作用,包括促进文化与... 详细信息

当前我国基层治理正面临结构性的冲击和价值理念的挑战,需要积极寻求新的价值理念传递方式及探索多元化治理的协同机制。居民公约作为有效整合传统智慧与现代治理形式的纽带,可以在基层治理的转型中发挥至关重要的作用,包括促进文化与法治的结合、实现多元治理的统一、加强内外部治理的协同及深化传统与现代治理形式的融合等。为充分发挥居民公约的衔接功能,需要以其作为融合载体和内外部连接的桥梁,通过集成传统智慧、规范参与程序、统合多元治理策略,以及建立层次化的公约体系和推广数字化的传播与协作等,应对当代基层治理的复杂性和动态性,提升基层治理体系的适应性和协同性。

关键词：居民公约基层治理融合机理实现路径

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村规民约与基层治理融合:现实背景、内在机理与实现路径

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决策科学 2024年第2期 87-96页

作者：张栋祥山东师范大学法学院山东济南250358

当前,我国基层治理正面临着结构性的冲击和价值理念的挑战,村规民约作为有效整合传统与现代治理资源的形式,在基层治理的转型中发挥至关重要的作用,包括促进基层治理环境的优化、实现基层治理资源与功能的统一、加强内外部治理的协同及... 详细信息

当前,我国基层治理正面临着结构性的冲击和价值理念的挑战,村规民约作为有效整合传统与现代治理资源的形式,在基层治理的转型中发挥至关重要的作用,包括促进基层治理环境的优化、实现基层治理资源与功能的统一、加强内外部治理的协同及深化传统与现代治理形式的融合等。为了充分发挥村规民约的中枢功能,需要以其作为文化与法治融合的载体、基层多元治理连通的纽带、外部权威与内部治理衔接的桥梁、传统治理资源与现代治理形式融合的媒介,通过政府草拟公约框架、集成内部传统智慧、规范组织参与和修改程序、统合多元治理策略、打造层次连接的公约体系,以及设立常态化的联席理事会、强化外部权威的支持和推广数字化的传播与协作等,为基层治理的优化提供丰富且有效的工具和策略。

关键词：基层治理村规民约融合机理实现路径

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Emulsification for castor biomass oil

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Frontiers of Chemical Science and Engineering 2011年第1期5卷 96-101页

作者： dongxiang zhang Yuanping LIN Anmei LI V.V.TARASOV School of Chemical Engineering and the Environment Beijing Institute of TechnologyBeijing 100081China D.I.Mendeleev University of Chemical Technology of Russia 125190 MoscowRussia

The effect of the emulsifier formula on the stability of castor oil-water system was studied through compounding three groups of emulsifiers from the aspects of stability factor of absorbance,centrifuge stability,demulsification time in quiescence,appearance of the droplets,and viscosity.The best emulsifier formula for castor biomass oil was the composite formula of sorbitan monooleate and polyoxyethylene sorbitan monostearate.Correlation exists between the stability of emulsion and the viscosity/particle size of the droplets,with better stability in the case of greater viscosity or narrower distribution of particle size in the emulsion of castor oil-water system.Methanol added to the castor oil-water system may decrease the viscosity of the emulsion.Comparing the castor oil-water emulsion with methanol-castor oil-water emulsion,the optimal hydrophilic and lipophilic balance(HLB)value based on castor oil-water system was acquired between 6.6 and 7.5,while the optimal HLB value based on the methanol-castor oil-water system was between 5.5 and 6.0.The optimal HLB value of methanolcastor oil-water system gradually moved to that of castor oil-water emulsion with adding more water.

关键词： castor oil biomass oil emulsification stability viscosity corrosivity

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