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Enhanced photocatalytic performance of Bi_(2)O_(2)CO_(3)/Bi_(4)O_(5)Br_(2)/reduced graphene oxide Z-schemehe terojunction via a one-pot room-temperature synthesis

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Journal of Environmental Sciences 2024年第4期138卷 418-427页

作者： Xiaoge Wu Lei Yan Rongrong Qin Qikai Zhang Wei Yang Xiaozhi Wang Yongcai Zhang Min Luo Jianhua Hou College of Environmental Science and Engineering Yangzhou UniversityYangzhouJiangsu 225009China Jiangsu Collaborative Innovation center for Solid Organic Waste Resource Utilization Nanjing 210095China Beijing xinfeng Aerospace Equipment Co. Ltd.Beijing 100854China Beijing System Design Institute of Electro-Mechanic Engineering Beijing 100005China College of Chemistry and Chemical Engineering Ningxia UniversityYinchuanNingxia 750021China

Bi_(2)O_(2)CO_(3)(BOC)/Bi_(4)O_5Br_(2)(BOB)/reduced graphene oxide(rGO)Z-scheme heterojunction with promising photocatalytic properties was synthesized via a facile one-pot room-temperature ***-thin nanosheets of BOC and BOB were grown in situ on r *** formed 2D/2D direct Z-scheme heterojunction of BOC/BOB with oxygen vacancies(OVs)effectively leads to lower negative electron reduction potential of BOB as well as higher positive hole oxidation potential of BOC,showing improved reduction/oxidation ***,rGO is an acceptor of the electrons from the conduction band of *** dual roles significantly improve the transfer performance of photo-induced charge carriers and accelerate their *** layered nanosheet structure,rich OVs,high specific surface area,and increased utilization efficiency of visible light,the multiple synergistic effects of BOC/BOB/rGO can achieve effective generation and separation of the electron-holes,thereby generating more·O_(2)^(-)and h^(+).The photocatalytic reduction efficiency of CO_(2)to CO(12.91μmol/(g·hr))is three times higher than that of BOC(4.18μmol/(g·hr)).Moreover,it also achieved almost 100%removal of Rhodamine B and cyanobacterial cells within 2 hours.

关键词： Bi_(2)O_(2)CO_(3) Bi_(4)O_(5)Br_(2) Reduced graphene oxide Z-scheme heterojunction Photocatalysis CO_(2)reduction

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Construction of Meteorological Observation Quality Management System for Basic Observation Business

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Meteorological and Environmental Research 2022年第3期13卷 37-39页

作者： Yiping LIN Xuanying XIE Jianbo PAN Liqing ZHOU Yali TAN xinfeng Meteorological Administration Xinfeng 511100China xinfeng emergency early warning center Xinfeng 511100China

A set of closed-loop normative standards of PDCA(planning-implementing-checking-improvement) of the quality management system is applied to promote the standardization, normalization and institutionalization of grass-roots meteorological observations, further improve the service availability and timely rate of data, and improve the quality and efficiency of meteorological observations.

关键词： Quality management system Meteorological observation Data quality Internal audit

Lightning Protection for the Computer Room of Electronic Information Systems

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Meteorological and Environmental Research 2022年第3期13卷 71-73页

作者： Xuanying XIE Yiping LIN Liqing ZHOU Liwen YE xinfeng emergency early warning center Xinfeng 511100China xinfeng Meteorological Administration Xinfeng 511100China

An electronic information system is composed of multiple groups of components. With the improvement of technology, its accuracy is getting higher and higher. The voltage during normal operation is only a few volts, and the information current is only microamp, so the withstand voltage to lightning electromagnetic pulse is extremely low. In this paper, the negative impact of lightning and static electricity on the computer room of an electronic information system was analyzed firstly, and then the design for the lightning protection of the computer room was discussed.

关键词： Electronic information system Lightning protection grounding Grounding design

Crystalline cyclic(alkyl)(amino)stannylene via transient stannyne

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Science China Chemistry 2024年

作者： xinfeng Wang Chaopeng Hu Zhihao Lu Liu Leo Liu Department of Chemistry and Research center for Chemical Biology and Omics Analysis College of Science Southern University of Science and Technology

We demonstrate that a bulky cyclic amino ligand, specifically 1,1,3,3-tetraphenylisoindolinyl, can facilitate the formation of a transient stannyne, endowed with adjacent ambiphilic carbon and tin centers. This stannyne, manifesting carbene-like behavior,engages in an unprecedented sequence of reactions, including Buchner ring expansion, [1,3]sigmatropic, and [1,5]-sigmatropic shifts, culminating in the synthesis of a stable cyclic(alkyl)(amino)stannylene. This compound represents the first tin analogue of the well-known cyclic(alkyl)(amino)carbenes. Both the bonding configuration and the formation process of this stannylene are thoroughly analyzed through quantum chemical computations. Our findings pave the way for further synthesis of unusual main group species using bulky isoindolinyl substituents, emphasizing their potential as a versatile tool in synthetic chemistry.

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Degradation of FAK-targeting by proteolytic targeting chimera technology to inhibit the metastasis of hepatocellular carcinoma

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Oncology Research 2024年第4期32卷 679-690页

作者： xinfeng ZHANG SHUANG LI MEIRU SONG YUE CHEN LIANGZHENG CHANG ZHERUI LIU HONGYUAN DAI YUTAO WANG GANGQI YANG YUN JIANG YINYING LU The PLA 307 Clinical College of Anhui Medical University The Fifth Clinical Medical College of Anhui Medical UniversityHefei230032China Liver Tumor Diagnosis and Research center 5th Medical Center of the PLA General HospitalBeijing100039China Department of Infection Diseases Guizhou Medical UniversityGuiyang550025China 4302 Clinical Medical School Peking UniversityBeijingChina Cell and Gene Therapy Innovation center Beijing Lotuslake BiomedicalScience and Technology ParkBeijing102206China State Key Laboratory of Chemical Oncogenomics and the Institute of Biopharmaceutical and Health Engineering(iBHE) Shenzhen International Graduate SchoolTsinghua UniversityShenzhen518055China

Liver cancer is a prevalent malignant cancer,ranking third in terms of mortality *** and recurrence primarily contribute to the high mortality rate of liver *** carcinoma(HCC)has low expression of focal adhesion kinase(FAK),which increases the risk of metastasis and ***,the efficacy of FAK phosphorylation inhibitors is currently ***,investigating the mechanisms by which FAK affects HCC metastasis to develop targeted therapies for FAK may present a novel strategy to inhibit HCC *** study examined the correlation between FAK expression and the prognosis of ***,we explored the impact of FAK degradation on HCC metastasis through wound healing experiments,transwell invasion experiments,and a xenograft tumor *** expression of proteins related to epithelial-mesenchymal transition(EMT)was measured to elucidate the underlying *** results showed that FAK PROTAC can degrade FAK,inhibit the migration and invasion of HCC cells in vitro,and notably decrease the lung metastasis of HCC in *** expression of E-cadherin and decreased expression of vimentin indicated that EMT was ***,degradation of FAK through FAK PROTAC effectively suppressed liver cancer metastasis,holding significant clinical implications for treating liver cancer and developing innovative anti-neoplastic drugs.

关键词： Hepatocellular carcinoma(HCC) Focal adhesion kinase(FAK) Proteolytic targeting chimera technology(PROTAC) Epithelial-mesenchymal transformation(EMT) Metastasis

Genetic characterizations and molecular epidemiology of human echovirus 30 isolated from Ningxia,China

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Biosafety and Health 2023年第6期5卷 346-354页

作者： Fang Yuan xinfeng Wei Xueping Ma Jiangtao Ma Xuemin Ma Xiaoqiang Sun Min Cao Juan Zhou Wei Zhang Hui Chen Rui Wang Jichen Li Qiang Sun Ningxia Hui Autonomous Region center for Disease Control and Prevention Yinchuan 750004China Ningxia Hui Autonomous Region People's Hospital Yinchuan 750021China National Laboratory for Poliomyelitis WHO WPRO Regional Polio Reference LaboratoryNational Key Laboratory for TraceabilityEarly Warning and Intlligent Decision of Infectious DiseasesNational Health Commission Key Laboratory for BiosafetyNational Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China

In October 2017,a small outbreak of echovirus 30(E30)associated with aseptic meningitis in nine cases occurred at a primary school in the Ningxia Hui Autonomous *** year,we observed a significant increase in E30 levels in an acute flaccid paralysis(AFP)case surveillance *** investigate their phylogenetic relationships,we determined the whole genomic sequences of 12 strains isolated from aseptic meningitis cases,AFP cases,and healthy *** found that the E30 strains circulating in Ningxia belong to two lineages(H and J).The strains isolated in 2010,2012,and 2016 belonged to the H *** 2017,a new lineage,J,emerged as the dominant *** trees were constructed based on the whole genome andP1,P2,andP3 regions;clustering with other types of enterovirus species B was found,suggesting that recombination events had *** recombination sites were mainly in regions2B,2C,*** study confirmed that the E30 strains in Ningxia in 2010,2012,and 2016 had different recombination patterns and were recombined with different *** 2017 epidemic E30 originated from another new lineage with a complex recombination pattern and formed an independent transmission chain in Ningxia.

关键词： Echovirus 30(E30) Complete genome sequence Molecular epidemiology

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Comprehensive understanding on sources of high levels of fine particulate nitro-aromatic compounds at a coastal rural area in northern China

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Journal of Environmental Sciences 2024年第1期135卷 483-494页

作者： Yueru Jiang xinfeng Wang Min Li Yiheng Liang Zhiyi Liu Jing Chen Tianyi Guan Jiangshan Mu Yujiao Zhu He Meng Yang Zhou Lan Yao Likun Xue Wenxing Wang Environment Research Institute Shandong UniversityQingdao 266237China Department of Environmental Systems Science Swiss Federal Institute of Technology ZurichZurich 8092Switzerland Department of Water Resources and Drinking Water Swiss Federal Institute of Aquatic Science and TechnologyDuebendorf 8600Switzerland Qingdao Eco-Environment Monitoring center of Shandong Province Qingdao 266003China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China School of Environmental and Geographical Sciences Shanghai Normal UniversityShanghai 200234China

Nitro-aromatic compounds(NACs)are among the major components of brown carbon(BrC)in the atmosphere,causing negative impacts on regional climate,air quality,and ecological *** to the extensive origins,it is still a challenge to figure out the contributions and originating regions for different sources of atmospheric ***,field observations on fine particulate NACs were conducted at a coastal rural area in Qingdao,China in the winter of 2018 and *** mean total concentrations of fine particulate nitro-aromatic compounds were 125.0±89.5 and 27.7±21.1 ng/m^(3)in the winter of 2018 and 2019,*** the measured eleven NACs,nitrophenols and nitrocatechols were the most abundant *** characteristics and correlation analysis showed that humidity and anthropogenic primary emissions had significant influences on the NAC *** this study,two tracing methods of the improved spatial concentration weighted trajectory(SCWT)model and the receptor model of positive matrix factorization(PMF)were combined to comprehensively understand the origins of NACs in fine particles at coastal *** major sources were identified,including coal combustion,biomass burning,vehicle exhaust,and secondary ***,coal combustion was responsible for about half of the observed nitro-aromatic compounds,followed by biomass burning(~30%).The results by SCWT demonstrated that the coal combustion dominated NACs mainly originated from the Shandong peninsula and the areas to the north and southwest,while those dominated by biomass burning primarily came from local Qingdao and the areas to the west.

关键词： Nitro-aromatic compounds Fine particles Source apportionment Originating region Combustion activities

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Phase/size dual controlled 2D semiconductor In_(2)X_(3)(X=S,Se,Te)for saturable absorption modulation

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Nano Research 2022年第6期15卷 5633-5639页

作者： Weibiao Wang Zhexue Chen Xinyu Sui Yueqi Li xinfeng Liu Yong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

The production of two-dimensional nanosheets(2D NSs)with all sizes(1-100 nm)and few(<10)layers is highly desired but far from ***,we report an all-physical top-down method to produce indium chalcogenide(In2X3(X=S,Se,Te))NSs with wide-range(150-3.0 nm)controlled *** method combines silica-assisted ball-milling and sonication-assisted solvent exfoliation to fabricate multiscale NSs with varying distributions,which are then precisely separated by cascade *** characterization techniques reveal that the as-produced In2X3 NSs are intrinsic and defect-free and remainβ-phase during the whole *** redispersions of In2X3 NSs exhibit prominent excitation wavelength-,solvent-,concentration-,and size-dependent *** NSs-poly(methyl methacrylate)(PMMA)hybrid thin films demonstrate strong size effects in nonlinear saturation *** absolute modulation depths of 35.4%,43.3%,47.2%and saturation intensities of 1.63,1.05,0.83 MW·cm^(−2)(i.e.,163,105,and 83 nJ·cm^(−2))are derived for the In_(2)S_(3),In_(2)Se_(3),and In2Te3 quantum sheets,*** method paves the way for mass production and full exploration of full-scale 2D NSs.

关键词： semiconductor quantum sheets intrinsic photoluminescence nonlinear saturation absorption

Phase-modulated quantum-sized TMDs for extreme saturable absorption

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Nano Research 2023年第4期16卷 5803-5808页

作者： Zhexue Chen Xinyu Sui Zhangqiang Li Yueqi Li xinfeng Liu Yong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

Two-dimensional semiconductors such as transition metal dichalcogenides(TMDs)have attracted much interest in the past ***,we present an all-physical top-down method for the scalable production of the intrinsic TMD quantum sheets(QSs).The phases of the TMDs(e.g.,2H-MoSe_(2),2H-WSe_(2),and Td-WTe2)remain stable during the transformation from bulk to ***,phase transition(from Td to 2H)is detected in *** phase-modulation by size-reduction has never been reported *** TMD QSs can be well dispersed in solvents,resulting in remarkable photoluminescence with excitation wavelength-,concentration-,and ***,the TMD QSs can be readily solution-processed into hybrid thin films,which demonstrate exceptional nonlinear saturation absorption(NSA).Notably,2H-MoTe2 QSs in poly(methyl methacrylate)show extremely high NSA performance with(absolute)modulation depth up to 46.6%and saturation intensity down to 0.81 MW·cm^(−2).Our work paves the way towards quantum-sized TMDs.

关键词： transition metal dichalcogenides(TMDs) intrinsic quantum sheets photoluminescence nonlinear saturation absorption