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Peracetic acid catalytic activation using Co3O4 nanocluster decorated graphitic carbon nitride for cefapirin degradation in water

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Science China Technological Sciences 2024年第10期67卷 3103-3115页

作者： YIN ShiMei GAO YiXuan CHEN Long LI fan LIU XiaoNa QI Fei LIU wen Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry University Key Laboratory of Water and Sediment Sciences (Ministry of Education) College of Environmental Sciences and EngineeringPeking University School of Environmental Science and Engineering Taiyuan University of Technology State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Peking University Beijing National Laboratory for Molecular Sciences Peking University

This study innovated cobalt-based catalytic nanocomposites（CCNs） for the heterogeneous activation of peracetic acid（PAA）,a green and efficient advanced oxidation process for removing antibiotics from *** Co3O4catalysts exhibit limited activity due to stable electronic *** overcome this,CCNs were synthesized using a one-step condensation method,incorporating a size control strategy that anchors Co3O4nanoclusters within 4-5 nm onto six-fold cavity of g-C3N4,simultaneously modifying the coordination environment of *** alteration significantly enhances the adsorption energy of PAA and catalytic activity compared to commercial *** improved performance of CCN2,in particular,is attributed to a shift in the cobalt d band center towards the Fermi level,facilitating electron delocalization and transfer,enhancing Co-O bonding,and accelerating PAA ***2's superior activity,with a cefapirin（CFP） degradation kinetic rate constant(k1=0.760 min-1)～11 times that of PAA direct oxidation(k1=0.070 min-1) and～5 times that of commercial Co3O4/PAA system(k1=0.164 min-1),is due to its ability to generate dominant reactive species for antibiotic degradation,including alkoxy radicals(CH3C（=O）OO·),high valence metal(CoⅣ（=O）2+),and singlet oxygen（1O2）,with the latter two being crucial for the degradation *** degradation of CFP involved three mechanisms,including direct oxidation by PAA,decarboxylation,and open-ring reactions at nitrogen *** research provides insights into developing high-activity catalysts for efficient PAA activation and antibiotic removal,leveraging the strategy of shifting the transition metal d band center.

关键词： peracetic acid Co3O4 nanocluster high valence metal singlet oxygen cefapirin

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Flexible and Stretchable Electrodes for In Vivo Electrophysiological and Electrochemical Monitoring

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Chinese Journal of Chemistry 2024年第13期42卷 1523-1545页

作者： Kai-Kai Sheng Yi-Fei Lu wen-Ting fan Yan-Ling Liu College of Chemistry and Molecular Sciences Wuhan University WuhanHubei 430072China Core Facilty of Wuhan University WuhanHubei 430072China

In vivo monitoring of bioelectrical and biochemical signals with implanted electrodes has received great interest over the past ***,this faces huge challenges because of the severe mechanical mismatch between conventional rigid electrodes and soft biological *** recent years,the emergence of flexible and stretchable electrodes offers seamless and conformable biological-electronic interfaces and has demonstrated significant advantages for in vivo electrochemical and electrophysiological *** review first summarizes the strategies for electrode fabrication from the point of substrate and conductive ***,recent progress in electrode functionalization for improved performance is ***,the advances of flexible and stretchable electrodes in exploring bioelectrical and biochemical signals are ***,we present some challenges and perspectives ranging from electrode fabrication to application.

关键词： Flexible electrodes Conductive materials Stretchable structures Electrode functionalization In vivo monitoring Biochemical signals Bioelectrical signals

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机器人多层多道焊圆弧轨迹的一种算法

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哈尔滨工业大学学报 2000年第3期32卷 111-114页

作者：董春樊滨温富历新哈尔滨工业大学机器人研究所黑龙江哈尔滨150001

提出一种实现机器人锅炉集箱管座多层多道焊的圆弧轨迹的规划算法 ,通过示教的 3点规划出多层多道的圆弧轨迹 ,并满足圆弧首尾相搭接的工艺要求 .对于集箱的轴向或径向排列的管座 ,即使存在空间定位误差和热变形 ,只要测量出该管座相对... 详细信息

提出一种实现机器人锅炉集箱管座多层多道焊的圆弧轨迹的规划算法 ,通过示教的 3点规划出多层多道的圆弧轨迹 ,并满足圆弧首尾相搭接的工艺要求 .对于集箱的轴向或径向排列的管座 ,即使存在空间定位误差和热变形 ,只要测量出该管座相对于示教管座的位置和姿态 ,不需重新示教该算法就可规划出该管座的多层多道的圆弧轨迹 .本算法已在实际生产中得到应用 ,证明满足焊接工艺的要求 .

关键词：机器人多层多道焊示教再现插补算法

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Numerical Simulation of Slurry Diffusion in Fractured Rocks Considering a Time-Varying Viscosity

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Fluid Dynamics & Materials Processing 2024年第2期20卷 401-427页

作者： Lei Zhu bin Liu Xuewei Liu Wei Deng wenjie Yao Ying fan School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan430068China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

To analyze the effects of a time-varying viscosity on the penetration length of grouting,in this study cement slur-ries with varying water-cement ratios have been investigated using the bingham’sﬂuidﬂow equation and a dis-crete element method.Aﬂuid-solid coupling numerical model has been introduced accordingly,and its accuracy has been validated through comparison of theoretical and numerical *** different fracture forms(a single fracture,a branch fracture,and a fracture network),the inﬂuence of the time-varying viscosity on the slurry length range has been investigated,considering the change in the fracture *** results show that under different fracture forms and the same grouting process conditions,the inﬂuence of the time-varying viscosity on the seepage length is 0.350 m.

关键词： Time-varying viscosity binghamﬂuids UDEC numerical simulation grout penetration length aperture

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Green carbonization of waste coffee grounds into porous C/Fe hybrids for broadband and high-efficiency microwave absorption

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Journal of Materials Science & Technology 2024年第3期170卷 1-10页

作者： Xin wen Cui Li Hui Liu Guohua fan Yanan Tang Chuncheng Hao Lili Ma Pingan Song Institute of Advanced Electrical Materials College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China Center for Future Materials University of Southern QueenslandSpringfieldQLD 4300Australia School of Agriculture and Environmental Science University of Southern QueenslandSpringfieldQLD 4300Australia

Recently great effort s have been focused on designing high-performance microwave absorbers using sustainable biomass resources,but there remains a lack of green and efficient fabrication ***,inspired by natural porous character of biomass waste,we demonstrated a green one-step route to convert waste coffee grounds into porous C/Fe hybrids,and further explored their potential applications for broadband and high-efficiency microwave *** this design,the WCG-20-750(incorporated 20 wt%Fe(C_(5)H_(7)O_(2))_(3)catalyst and carbonized at 750℃)exhibited porous microstructure with the highest char yield of 55.45 wt%.Furthermore,the as-prepared C/Fe hybrids from WCG-20-750 displayed excellent microwave absorption ***,the minimum reflection loss(RL_(min))reached to-52.86 dB and the widest effective absorption bandwidth(EAB)was 6.40 GHz at the thickness of 3.0 *** work provides an economically viable and environmentally friendly strategy to convert biomass wastes into value-added microwave absorbers,ultimately making contributions to the upcycling of renewable biomass resources and the fostering of sustainable environment.

关键词： Waste recycling Microwave absorption Green carbonization Porous carbon Biomass

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Development of a new Cox model for predicting long-term survival in hepatitis cirrhosis patients underwent transjugular intrahepatic portosystemic shunts

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 491-502页

作者： Yi-fan Lv bing Zhu Ming-Ming Meng Yi-fan Wu Cheng-bin Dong Yu Zhang Bo-wen Liu Shao-Li You Sa Lv Yong-Ping Yang Fu-Quan Liu Liver Disease Minimally Invasive Diagnosis and Treatment Center Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China Liver Vascular Disease Diagnosis and Treatment Center The Fifth Medical Center of Chinese People's Liberation Army General HospitalBeijing 100039China

BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)placement is a procedure that can effectively treat complications of portal hypertension,such as variceal bleeding and refractory ***,there have been no specific studies on predicting long-term survival after TIPS *** To establish a model to predict long-term survival in patients with hepatitis cirrhosis after *** A retrospective analysis was conducted on a cohort of 224 patients who un-derwent TIPS *** univariate and multivariate Cox regression analyses,various factors were examined for their ability to predict survival at 6 years after ***,a composite score was formulated,encompassing the indication,shunt reasonability,portal venous pressure gradient(PPG)after TIPS,percentage decrease in portal venous pressure(PVP),indocyanine green retention rate at 15 min(ICGR15)and total bilirubin(Tbil)***,the performance of the newly developed Cox(NDC)model was evaluated in an in-ternal validation cohort and compared with that of a series of existing *** The indication(variceal bleeding or ascites),shunt reasonability(reasonable or unreasonable),ICGR15,post-operative PPG,percentage of PVP decrease and Tbil were found to be independent factors affecting long-term survival after TIPS *** NDC model incorporated these parameters and successfully identified patients at high risk,exhibiting a notably elevated mortality rate following the TIPS procedure,as observed in both the training and validation ***,in terms of predicting the long-term survival rate,the performance of the NDC model was significantly better than that of the other four models[Child-Pugh,model for end-stage liver disease(MELD),MELD-sodium and the Freiburg index of post-TIPS survival].CONCLUSION The NDC model can accurately predict long-term survival after the TIPS procedure in patients with hepatitis cirrhosis,help identify high-risk patients

关键词： Transjugular intrahepatic portosystemic shunt Long-term survival Predictive model

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Bottom-up construction of low-dimensional perovskite thick films for high-performance X-ray detection and imaging

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Light(Science & Applications) 2024年第9期13卷 1809-1819页

作者： Siyin Dong Zhenghui fan Wei Wei Shujie Tie Ruihan Yuan bin Zhou Ning Yang Xiaojia Zheng Liang Shen Sichuan Research Center of New Materials Institute of Chemical MaterialsChina Academy of Engineering PhysicsShuangliuChengduChina State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringInternational Center of Future ScienceJilin UniversityChangchunChina

Quasi-two-dimensional(Q-2D)perovskite exhibits exceptional photoelectric properties and demonstrates reduced ion migration compared to 3D perovskite,making it a promising material for the fabrication of highly sensitive and stable X-ray ***,achieving high-quality perovskite films with sufficient thickness for efficient X-ray absorption remains ***,we present a novel approach to regulate the growth of Q-2D perovskite crystals in a mixed atmosphere comprising methylamine(CH3NH2,MA)and ammonia(NH3),resulting in the successful fabrication of high-quality films with a thickness of hundreds of ***,we build a heterojunction X-ray detector by incorporating the perovskite layer with titanium dioxide(TiO2).The precise regulation of perovskite crystal growth and the meticulous design of the device structure synergistically enhance the resistivity and carrier transport properties of the X-ray detector,resulting in an ultrahigh sensitivity(29721.4μC Gyair−1 cm−2)for low-dimensional perovskite X-ray detectors and a low detection limit of 20.9 nGyair s−*** have further demonstrated a flat panel X-ray imager(FPXI)showing a high spatial resolution of 3.6 lpmm−1 and outstanding X-ray imaging capability under low X-ray *** work presents an effective methodology for achieving high-performance Q-2D perovskite FPXIs that holds great promise for various applications in imaging technology.

关键词： perovskite dimensional performance

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A Selenium Atom Involved Covalent Organic Framework for Window Ledge Photocatalytic Oxidation of Sulfides

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Chinese Journal of Chemistry 2024年第17期42卷 1960-1966页

作者： fan Yang Xia Li Hong-Yan Qu Jing-Lan Kan Yuan Guo Yu-bin Dong College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongKey Laboratory of Molecular and Nano ProbesMinistry of EducationShandong Normal UniversityJinanShandong250014China School of Light Industry and Engineering Qilu University of Technology(Shandong Academy of Sciences)JinanShandong 250353China

Covalent organic frameworks(coFs)driven photocatalytic organic transformations especially photooxidation reactions have become a fertile topic and attracted numerous research *** the charge generation and transport process is the key factor for achieving high catalytic *** one of the most effective strategies,the introduction of"heavy atoms"into the long-range ordered conjugated backbones can effectively facilitate the intersystem crossing(isc)process and hence improve the generation of active oxygens,which is beneficial for the *** this work,we designed and synthesized a benzoselenadiazole based covalent organic framework(COF)material,BSe-COF with heavy atom of selenium(Se),and a benzothiadiazole based BT-COF with isomorphic backbone for comparison.

关键词： Covalent organic framework Benzoselenadiazole Density functional theory Heavy atom Photocatalysis Photooxidation Singletoxygen Window ledge reaction

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Rational design of biodegradable semiconducting polymer nanoparticles for NIR-II fluorescence imaging-guided photodynamic therapy

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Nano Research 2024年第6期17卷 5399-5408页

作者： Xuxuan Gu Jinlong Shen Zhiwei Xu wenqi Wang Ying Wu wen Zhou Chen Xie Quli fan State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China

Semiconducting polymer nanoparticles(SPNs)have shown great promise in second near-infrared window(NIR-II)***,the issue of long metabolic time significantly restricts the clinical application of *** this study,we rationally designed a biodegradable SPN(BSPN50)for NIR-II fluorescence imaging-guided photodynamic therapy(PDT).BSPN50 is prepared by encapsulating a biodegradable SP(BSP50)with an amphiphilic copolymer ***50 is composed of NIR-II fluorescent diketopyrrolopyrrole(DPP)segment and degradable poly(phenylenevinylene)(PPV)segment with the ratio of 50/***50 has both satisfactory degradability under myeloperoxidase(MPO)/hydrogen peroxide(H_(2)O_(2))and NIR-II fluorescence emission upon 808 nm laser ***,BSPN50 shows good photodynamic efficacy under 808 nm laser ***50 shows a faster degradation rate than BSPN100 which has no PPV segment both in vitro and in *** addition,BSPN50 can effectively diagnose tumor via NIR-II fluorescence imaging and inhibit the tumor growth by ***,our study provides a rational approach to construct biodegradable nanoplatforms for efficient tumor NIR-II phototheranostics.

关键词： near-infrared(NIR)-II fluorescence imaging semiconducting polymer nanoparticles photodynamic therapy tumor imaging

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Experimental observation of spontaneous symmetry breaking in a quantum phase transition

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 34-39页

作者： wen Ning Ri-Hua Zheng Jia-Hao Lu fan Wu Zhen-Biao Yang Shi-Biao Zheng Fujian Key Laboratory of Quantum Information and Quantum Optics College of Physics and Information EngineeringFuzhou UniversityFuzhou 350108China Hefei National Laboratory Hefei 230088China

Spontaneous symmetry breaking(SSB)plays a central role in understanding a large variety of phenomena associated with phase transitions,such as superfluid and *** far,the transition from a symmetric vacuum to a macroscopically ordered phase has been substantially *** process bridging these two distinct phases is critical to understanding how a classical world emerges from a quantum phase transition,but so far remains unexplored in *** here report an experimental demonstration of such a process with a quantum Rabi model engineered with a superconducting *** move the system from the normal phase to the superradiant phase featuring two symmetry-breaking field components,one of which is observed to emerge as the classical *** results demonstrate that the environment-induced decoherence plays a critical role in the SSB.

关键词： quantum phase transition Rabi model spontaneous symmetry breaking superconducting circuit Schrodinger cat states

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