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Visible-light degradation of azo dyes by imine-linked covalent organic frameworks

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Green Energy & Environment 2023年第1期8卷 194-199页

作者： Hongbo Xue Sen Xiong Kai mi Yong Wang State Key Laboratory of Materials-Oriented Chemical Engineering And College of Chemical EngineeringNanjing Tech UniversityNanjing211816JiangsuChina

Covalent organic frameworks(COFs)are nanoporous crystalline polymers with densely conjugated *** work discovers that imine-linked COFs exhibit remarkable photodegradation efficiency to azo dyes dissolved in *** light generates different types of radicals from COFs,and superoxide radicals break N=N bonds in dye molecules,resulting in 100%degradation of azo dyes within 1 *** contrast,these dyes cannot be degraded by conventionally used photocatalysts,for example,***,the COF photocatalysts can be recovered from the dye solutions and re-used to degrade azo dyes for multiple times without loss of degradation *** work provides an efficient strategy to degrade synthetic dyes,and we expect that COFs with designable structures may use as new photocatalysts for other important applications.

关键词： Covalent organic frameworks Dyes Photocatalytic degradation Porous polymer Water pollution

The adaptive characteristics of memory: A perspective from the life-span development of associative memory illusion

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Chinese Science Bulletin 2010年第16期55卷 1581-1589页

作者： WANG mi GENG HaiYan Department of Psychology Peking University Beijing 100871 China

The reconstructive process in memory may cause distortions or *** memory illusion is one of the most common types of false *** acts as a reflection of the adaptive characteristic of memory by suggesting its ability to adaptively use semantic gist information even with limited cognitive ***, the adaptive characteristic of memory is also manifested by inhibiting false memories with certain strategies (e.g., encoding item-specific information) to ensure memory accuracy according to the demands of specific *** article looks into the life-span developmental features of the adaptive characteristic of memory by summarizing the age features of two types of abilities: employing gist representation and inhibiting associative memory *** the future, further efforts in this field are proposed to explore the specific adaptive nature of memory from the perspective of evolution.

关键词：联想记忆错觉适应特点寿命语义信息自适应重建过程资源有限

Infective native aortic aneurysm primarily presenting as gastrointestinal bleeding:a case report

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World Journal of Emergency Medicine 2024年第6期15卷 514-516页

作者： Xinyu Zhang Yuhong mi Emergency and Critical Care Center Beijing Anzhen HospitalCapital Medical UniversityBeijing 100013China

Infective native aortic aneurysm(INAA)is a rare vascular *** studies reported that this type of aneurysm accounts for 0.6% to 2.6% of all aortic aneurysms in the European Union and USA,but accounts for 13% of all aortic aneurysms in Asia.[1,2]Early and accurate detection and intervention are effective in improving patient prognosis,although the non-specific symptoms can make diagnosis challenging.

关键词： aneurysm aortic diagnosis

Fatal risk in hysteroscopic surgery that should not be overlooked:Uterine artery pseudoaneurysm

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World Journal of Clinical Cases 2025年第8期13卷 53-56页

作者： mi-Si He Ke-Xiao Yu Chen Wang Department of Gynecologic Oncology Chongqing University Cancer Hospital and Chongqing Cancer Institute and Chongqing Cancer HospitalChongqing 400030China Department of Orthopedics Chongqing Hospital of Traditional Chinese MedicineChongqing 400021China

This article provides a detailed account of the diagnosis and treatment of a case involving a uterine artery pseudoaneurysm(UAP),as well as an analysis of UAP *** finding emphasizes that UAP should be considered in patients presenting with abnormal genital bleeding after hysteroscopy and offers valuable insights and lessons for gynecologists in hysteroscopic *** patient underwent timely relevant examinations to confirm the diagnosis,allowing for crucial time required for her *** this study,the primary cause of UAP formation in the patient was attributed to a prior hysteroscopic surgical procedure conducted at another medical facility,suggesting that the selection and imple-mentation of dilatation catheters are some of the predisposing factors for *** conclusion,this case study offers a comprehensive analysis of the etiology of UAP and effectively provides timely diagnosis and treatment,offering valuable in-sights for the clinical diagnosis and management of UAP.

关键词： Editorial Uterine artery pseudoaneurysm Case report Hysteroscopic surgery Uterine arteriovenous malformations

Controllable construction of La_(2)Li_(0.5)Co_(0.5)O_(4)multifunctional“armor”to stabilize Li-rich layered oxide cathode for highperformance lithium-ion batteries

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Nano research 2023年第7期16卷 10634-10643页

作者： Xiaoyang Deng mi Li Zizai Ma Xiaoguang Wang Institute of New Carbon Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China

Lithium-rich manganese-based cathodes(Lr)are valuable cathode materials for the next generation of lithium-ion batteries(LIBs)with high-energy ***,the fast voltage/capacity decay on cycling is the major obstacle for the practical application induced by the less-than-ideal anionic redox reactions and structure ***,in order to tackle these challenges,a perovskite-like La_(2)Li_(0.5)Co_(0.5)O_(4)(LLCO)material is selected as protective surface to stabilize the Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)(Lr)substrate through wet chemical coating *** structure/phase characterizations and electrochemical tests exhibit that the LLCO can not only minish the oxygen evolution and enhance the structure stability,but also restrain the electrolyte corrosion and increase the mechanical strength of cathode ***,the coated LLCO with high electronic/ionic conductivity dramatically accelerates the energy storage kinetic,thereby displaying the improved rate ***,the optimized Lr@LLCO sample(1LLCO)exhibits a high capacity of 250.6 mAh·g^(-1)after 100 cycles at 0.1 C and excellent capacity retention of 82.6%after 200 cycles at 2 *** work provides a new idea for the modification of Lr cathodes toward commercial high-performance LIBs.

关键词： lithium-rich manganese-based oxide lithium-ion batteries surface modification electrochemical performance

Elucidating the diffusion pathway of lithium ions in superionic halide solid electrolytes Li_(2+x)Hf_(1-x)In_(x)Cl_(6) for all-solid-state lithium-metal based batteries

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Journal of Energy Chemistry 2023年第12期87卷 12-23,I0002页

作者： Kaiyong Tuo Fusheng Yin Fanghui mi Chunwen Sun School of Chemical&Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China

All-solid-state batteries(ASSBs) with inorganic solid-state-electrolytes(SSEs) have been regarded as the promising candidate for next-generation energy storage due to their high energy density and outstanding safety ***,the representative oxide and sulfide electrolytes suffer from low ionic conductivity and poor(electro)chemical stability,***,we report a series of new halide superionic conductors Li_(2+x)Hf_(1-x)In_(x)Cl_(6) with high ionic conductivity up to 1.05 mS cm^(-1) at 30 ℃ that are simultaneously stable to high *** means of the characterization techniques and bond-valence site energy(BVSE) calculation,insights into the effect of the phase transformation and underlying ionic transport mechanism by In substitution for Hf in Li_(2)HfCl_(6) are ***,with the increased amount of aliovalent substitution in Li_(2+x)Hf_(1-x)In_(x)Cl_(6) microcrystal framework,a gradual structure evolution from trigonal to monoclinic phase has been observed,which is accompanied by the redistribution of Li-ions to generate two dimensionally(2D) preferable diffusion pathways through octahedral-tetrahe dral-octahedral sites in In^(3+)-substituted Li_(2)HfCl_(6).Additionally,due to the oxidative stability of Insubstituted Li_(2)HfCl_(6),the bulk-type ASSBs with bare LiCoO_(2) deliver distinguished electrochemical performance.

关键词： Aliovalent substitution Halide electrolytes lonic conductivity All-solid-state batteries

Catalysts for electrochemical ammonia oxidation:Trend,challenge,and promise

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Science China Materials 2022年第12期65卷 3334-3352页

作者： Sol A Lee mi Gyoung Lee Ho Won Jang Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Electrical and Computer Engineering University of TorontoToronto M5S 3G4OntarioCanada Advanced Institute of Convergence Technology Seoul National UniversitySuwon 16229Republic of Korea

Developing sustainable and clean energy technology is critial to address the current energy and environmental *** an energy carrier,hydrogen has been getting attention due to its abundance,high energy density,and zero carbon *** to the difficulty of hydrogen storage and transport,the electro-oxidation of ammonia shows great potential for renewable energy since it satisfies both energy supply and environmental protection as a carbon-free fuel with high hydrogen ***,ammonia electro-oxidation is a sluggish reaction and shows low *** the complicated mechanism and intermediates is conducive to developing efficient electrocatalysts with high catalytic activity and *** review begins with the ammonia oxidation technologies and their *** two typical mechanisms for ammonia electro-oxidation,Oswin-Salomon mechanism and Gerischer-Mauerer mechanism,are discussed,and attention to the poisoning species is ***,the electrocatalysts for ammonia reaction are classified into Pt-based catalysts and non-noble metal-based catalysts,and their performances are reviewed with various *** on the progress on the electrochemical ammonia oxidation catalysts,the challenges and future insight on ammonia oxidation reaction are discussed and proposed.

关键词： NH3 oxidation reaction electrocatalysts green hydrogen

Multidimensional(0D-3D)functional nanocarbon:Promising material to strengthen the photocatalytic activity of graphitic carbon nitride

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Green Energy & Environment 2021年第6期6卷 823-845页

作者： Bin He mi Feng Xinyan Chen Jian Sun School of Life Science Beijing Institute of TechnologyBeijing100081China Advanced research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing100081China

As a prospective visible-light-responsive photochemical material,graphitic carbon nitride(g-C_(3)N_(4))has become a burgeoning research hot topics and aroused a wide interest as a metal-free semiconductor in the area of energy utilization and conversion,environmental protection due to its unique properties,such as facile synthesis,high physicochemical stability,excellent electronic band structure,and ***,the shortcomings of high recombination rate of charge carriers,relatively low electrical conductivity and visible light absorption impede its practical *** strategies,such as surface photosensitization,heteroatom deposition,semiconductor hybridization,etc.,have been applied to overcome the *** all the strategies,functional nanocarbon materials with various dimensions(0D~3D)attract much attention as modifiers of g-C_(3)N_(4)due to their unique electronic properties,optical properties,and easy *** importantly,the properties of these functional nanocarbon materials can be tuned by various dimensions and thus there will be a way to overcome the defects of g-C_(3)N_(4)by choosing different dimensional carbon *** from some present reviews,this review starts with the fundamental physicochemical characteristics of g-C_(3)N_(4)materials,followed by analyzing the advantages of functional nanocarbon materials modifying gC_(3)N_(4).Then,we present a systematic introduction to various dimensional carbon *** design philosophy of carbon/g-C_(3)N_(4)composites and the advanced studies are exemplified in ***,a nichetargeting summary and outlook on the major challenges,opportunities for future research in high-powered carbon/g-C_(3)N_(4)composites was proposed.

关键词： Graphitic carbon nitride(g-C_(3)N_(4)) Carbon materials Multidimension Photocatalysis Visible light

Photodegradation of Hexafluoropropylene Oxide Trimer Acid under UV Irradiation

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Journal of Environmental Sciences 2020年第11期32卷 132-140页

作者： Chen Li Na mi Zhanghao Chen Cheng Gu State Key Laboratory of Pollution Control and resource reuse School of the EnvironmentNanjing UniversityNanjing 210023China

As a novel alternative to traditional perfluoroalkyl substances(PFASs),including perfluorooctanoic acid(PFOA)and perfluorooctane sulfonate(PFOS),hexafluoroproplyene oxide trimer acid(HFPO-TA)has been detected worldwide in surface ***,recent researches have demonstrated that HFPO-TA has stronger bioaccumulation potential and higher hepatotoxicity than *** treat these contaminants *** and PFOS,some photochemical techniques by adding exogenous substances had been ***,there is still no report for the behavior of HFPO-TA itself under direct UV *** current study investigated the photo-transformation of HFPO-TA under UV irradiation in aqueous *** 72 hr photoreaction,75%degradation ratio and 25%defluorination ratio were achieved under ambient *** active species,i.e.,hydrated electrons and active hydrogen atoms,generated from water splitting played dominant roles in degradation of HFPO-TA,which was confirmed by different effects of reaction atmospheres and quenching experiments.A possible degradation pathway was proposed based on the products identification and theoretical *** general,HFPO-TA would be transformed into shorter-chain PFASs,including hexafluoropropylene oxide dimer acid(HFPODA),perfluoropropionic acid(PFA)and trifluoroacetate(TFA).This research provides basic information for HFPO-TA photodegradation process and is essential to develop novel remediation techniques for HFPO-TA and other alternatives with similar structures.

关键词： HFPO-TA Photo-reductive Hydrated electrons Active hydrogen atoms Degradation pathway