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2D MXenes as Co-catalysts in Photocatalysis:Synthetic Methods

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Nano-Micro Letters 2019年第4期11卷 403-424页

作者： Yuliang Sun Xing Meng Yohan dall’agnese Chunxiang dall’agnese Shengnan Duan Yu Gao Gang Chen Xiao-Feng Wang Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012People’s Republic of China Jilin Key Engineering Laboratory of New Energy Materials and Technologies Jilin UniversityChangchun 130012People’s Republic of China A.J.Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel UniversityPhiladelphiaPA 19104USA Institute for Materials Discovery Faculty of Maths and Physical SciencesUniversity College LondonLondon WC1E 7JEUK

Since their seminal discovery in 2011,two-dimensional(2D)transition metal carbides/nitrides known as MXenes,that constitute a large family of 2D materials,have been targeted toward various applications due to their outstanding electronic *** functioning as co-catalyst in combination with certain photocatalysts have been applied in photocatalytic systems to enhance photogenerated charge separation,suppress rapid charge recombination,and convert solar energy into chemical energy or use it in the degradation of organic *** photocatalytic performance greatly depends on the composition and morphology of the photocatalyst,which,in turn,are determined by the method of preparation ***,we review the four different synthesis methods(mechanical mixing,self-assembly,in situ decoration,and oxidation)reported for MXenes in view of their application as co-catalyst in *** addition,the working mechanism for MXenes application in photocatalysis is discussed and an outlook for future research is also provided.

关键词： MXenes Photocatalysis Co-catalyst Synthetic methods

Spray-coated SnO_(2) electron transport layer with high uniformity for planar perovskite solar cells

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Frontiers of Chemical Science and Engineering 2021年第1期15卷 180-186页

作者： Yaqin Wang Lin Yang Chunxiang dall’agnese Gang Chen Ai-Jun Li Xiao-Feng Wang Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012China College of Physics Jilin UniversityChangchun 130012China

SnO_(2) has been proven to be an effective electron transport layer(ETL)material for perovskite solar cells(PSCs)owing to its excellent electrical and optical ***,we introduce a viable spray coating method for the preparation of SnO2 ***,we employ a SnO_(2) film prepared using the spray coating method as an ETL for *** PSC based on the spray-coated SnO_(2) ETL achieves a power conversion efficiency of 17.78%,which is comparable to that of PSCs based on conventional spin-coated SnO_(2) *** large-area SnO_(2) films prepared by spray coating exhibit good repeatability for device *** study shows that SnO_(2) films prepared by spray coating can be applied as ETLs for stable and high-efficiency *** the proposed method involves low material consumption,it enables the low-cost and large-scale production of PSCs.

关键词： spray coating SnO_(2)film ETL PSCs

Experimental hydrodynamic assessment of a cylindrical-type floating solar system exposed to waves

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Journal of Ocean Engineering and Science 2023年第4期8卷 461-473页

作者： dallán Friel Madjid Karimirad Trevor Whittaker John Doran School of Natural and Built Environment Queen’s University BelfastStranmillis RdBelfastAntrimNorthern IrelandUK The Bryden Centre Letterkenny Institute of TechnologyPort RdLetterkenny Co.DonegalIreland

In this paper,an experimental investigation on the wave loads and structural motions of two semi-fixed semi-immersed horizontal cylinders type rafts in the free surface zone is *** physical mod-els are tested at the 1:4.5 scale and exposed to a range of regular and irregular waves in a wave flume at Queen’s University *** physical models and experimental setup are discussed alongside an in-vestigation of the hydrodynamic phenomena,surge forces,and dynamic responses that each structure ex-hibits in the coastal wave ***,an investigation into the wave attenuation by both mod-els is carried *** results show that the surge forces have a positive correlation with wave steepness for both *** phenomena such as wave runup and overtopping,radiative damping and reflected waves,constructive interference,diffraction and flow separation were identified during the ex-periments.A negative mean heave displacement is observed during the monochromatic sea states which could result in impact loading and submergence of the superstructure components and photovoltaic pan-els at *** results presented in this paper may be used to calibrate and verify numerical models that calculate the global responses and hydrodynamic *** may also benefit the design processes of geometrically similar floating solar technologies by providing data on surge loads,motion responses and hydrodynamic observations.

关键词： Floating photovoltaics Experimental analysis Motion capture system Floating solar

Supramolecular assembly of chloroplast NADH dehydrogenase-like complex with photosystem Ⅰfrom Arabidopsis thaliana

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Molecular Plant 2022年第3期15卷 454-467页

作者： Xiaodong Su Duanfang Cao Xiaowei Pan Lifang Shi Zhenfeng Liu Luca dall’Osto Roberto Bassi Xinzheng Zhang Mei Li National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China College of Life Science Capital Normal UniversityBeijing 100101P.R.China Dipartimento di Biotecnologie Universitàdi Verona37134 VeronaItaly Center for Biological Imaging CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101P.R.China

Cyclic electron transport/flow(CET/CEF)in chloroplasts is a regulatory process essential for the optimization of plant photosynthetic efficiency.A crucial CEF pathway is catalyzed by a membrane-embedded NADH dehydrogenase-like(NDH)complex that contains at least 29 protein subunits and associates with photosystem I(PSI)to form the NDH-PSI ***,we report the 3.9Åresolution structure of the Arabidopsis thaliana NDH-PSI(AtNDH-PSI)*** constructed structural models for 26 AtNDH subunits,among which 11 are unique to chloroplasts and stabilize the core part of the NDH *** the supercomplex,one NDH can bind up to two PSI-light-harvesting complex I(PSI-LHCI)complexes at both sides of its membrane *** minor LHCIs,Lhca5 and Lhca6,each present in one PSI-LHCI,interact with NDH and contribute to supercomplex formation and ***,our study reveals the structural details of the AtNDH-PSI supercomplex assembly and provides a molecular basis for further investigation of the regulatory mechanism of CEF in plants.

关键词： cyclic electron transport/flow NADH dehydrogenase-like(NDH)complex photosystem I structure Arabidopsis thaliana

Extensive right coronary artery thrombosis in a patient with COVID-19:A case report

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World Journal of Clinical Cases 2022年第31期10卷 11508-11516页

作者： Clarissa Campo dall’Orto Rubens Pierry Ferreira Lopes Mariana Torres Cancela Ciria de Sales Padilha Gilvan Vilella Pinto Filho Marcos Raphael da Silva Therapy Center Brazilian Society of Health Support HospitalTeixeira de Freitas 45987-088BahiaBrazil Department of Cardiology Deputy Luis Eduardo Magalhães HospitalPorto Seguro 45810-000BahiaBrazil Intensive Care Unit Medical Assistance Extreme South HospitalEunápolis 45820-131BahiaBrazil

BACKGROUND Occurring in approximately 30%of hospitalized patients,cardiovascular complications that take place during the course of coronavirus disease 2019(COVID-19)have been shown to cause morbidity and *** case is the first report of extensive right coronary artery(RCA)thrombosis that was evaluated by intracoronary imaging and intracoronary invasive physiology in a patient with *** SUMMARY A 62-year-old woman presented with flu-like symptoms;ten days later,she presented with inferior ST-segment elevations,chest pain,dyspnea,nausea and *** patient was diagnosed with COVID-19 following a positive test *** angiography of the RCA and its branches indicated intraluminal filling defects,suggesting a *** ultrasound confirmed a subacute thrombus in the RCA,the right posterior descending branch and the right posterior ventricular(RPV)*** was also an acute thrombus in the RPV branch and atherosclerosis in the *** antiplatelet/anticoagulation therapy was *** 7 d,angiography revealed complete disappearance of the *** coherence tomography confirmed this with the exception of a small thrombus in the RPV branch and atherosclerotic plaque in the *** atherosclerotic RCA was measured using the resting fullcycle ratio,indicating no impairment to coronary *** patient was discharged on the 11^(th) day of hospitalization and remained asymptomatic through the 6-mo *** This was the first report of RCA thrombosis in a patient with *** antiplatelet/anticoagulation therapy was successful.

关键词： Acute coronary syndrome Coronary angiography COVID-19,Intravascular ultrasound Thrombosis Case report

EurBeST——商业养蜂条件下的抗螨蜂种选育

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中国蜂业 2024年第2期75卷 22-23页

作者： R.Buechler A.Uzunov C.Costa M.Meixner Y Le Conte F.Mondet M.Kovacic S.Andonov N.L.Carreck L.Dimitrov B.Basso M.Bienkowska R.dall’Olio F.Hatjina U.Wirtz 陈超(文\图) 单金琼(文\图) 不详

上期我们讲了抗螨蜜蜂的选育以及取得的成效,本期我们继续讨论选育抗螨蜜蜂过程中遇到的问题及建议。一、种蜂王的用户调查对目前蜂王市场的调查显示,客户的期望值很高,但满意度一般。欧洲养蜂人希望买到高品质的蜂王,其中最重要的是抗... 详细信息

上期我们讲了抗螨蜜蜂的选育以及取得的成效,本期我们继续讨论选育抗螨蜜蜂过程中遇到的问题及建议。一、种蜂王的用户调查对目前蜂王市场的调查显示,客户的期望值很高,但满意度一般。欧洲养蜂人希望买到高品质的蜂王,其中最重要的是抗病和高产。但是,他们对抗病性的满意度最低(图1)。近50%的用户认为选择育种是实现免用药养蜂的重要甚至唯一的手段。具有悠久育种传统的国家的用户对选择育种的认可率更高。

关键词：选择育种用户调查蜂王问题及建议抗螨养蜂人蜜蜂商业养蜂

Enhanced Photoprotection by Protein-Bound vs Free Xanthophyll Pools： A Comparative Analysis of Chlorophyll b and Xanthophyll Biosynthesis Mutants

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Molecular Plant 2010年第3期3卷 576-593页

作者： Luca dall'Osto Stefano Cazzaniga Michel Havaux Roberto Bassi Dipartimento di Biotecnologie Universita di Verona Strada Le Grazie 15 37134 Verona Italy CEA IBEB SBVME Laboratoire d'Ecophysiologie Moldculaire des Plantes 13108 Saint-Paul-lez-Durance France CNRS UMR Biologie Vegetale et Microbiologie Environnementales 13108 Saint-Paul-lez-Durance France Universite Aix-Marseille 13108 Saint-Paul-lez-Durance France

When light absorbed by plants exceeds the capacity of photosynthesis, the xanthophyll violaxanthin is reversibly de-epoxidized to zeaxanthin in the so-called xanthophyll cycle. Zeaxanthin plays a key role in the protection of photosynthetic organisms against excess light, by promoting rapidly reversible （qE） and long-term （ql） quenching of excited chlorophylls, and preventing lipid oxidation. The photoprotective role of zeaxanthin, either free or bound to light-harvesting complexes （Lhcs）, has been investigated by using mutants lacking Chl b （chl） and/or specific xanthophyll species （npq, lut2）. The chl mutation causes （1） the absence of Lhcb proteins; （2） strong reduction of the feedback deexcitation （qE）; and （3） accumulation of xanthophylls as free pigments into thylakoids. Chl mutants showed extreme sensitivity to photo-oxidative stress in high light, due to higher singlet oxygen （102） release. The double mutant chlnpql was more sensitive to photo-oxidation than chl, showing that zeaxanthin does protect lipids even when free in the membrane. Nevertheless, lack of zeaxanthin had a much stronger impact on the level of lipid peroxidation in Lhcs-containing plants （WTvs npql） with respect to Lhc-less plants （chl vs chlnpql）, implying that its protective effect is enhanced by interaction with antenna proteins. It is proposed that the antioxidant capacity of zeaxanthin is empowered in the presence of PSII- LHCs-Zea complexes, while its effect on enhancement of qE only provides a minor contribution. Comparison of the sensitivity of WT vs npql plants to exogenous 102 suggests that besides the scavenging of 102, at least one additional mechanism is involved in chloroplast photoprotection.

关键词： Zeaxanthin singlet oxygen photoprotection chloroplast light-harvesting complexes.

Surface-Modified Metallic Ti3C2Tx MXene as Electron Transport Layer for Planar Heterojunction Perovskite Solar Cells

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Surface-Modified Metallic Ti3C2Tx MXene as Electron Transpor...

Performance improvement of MXene-based perovskite solar cells upon property transition from metallic to semiconductive by oxidation of Ti3C2Tx in air

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Lin Yang Chunxiang dall’agnese Yohan dall’agnese Gang Chen Yu Gao Yoshitaka Sanehira Ajay Kumar Jena Xiao-Feng Wang Yury Gogotsi Tsutomu Miyasaka Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin University

MXenes are a large and rapidly expanding family of two-dimensional(2 D) materials which,owing to their unique optoelectronic properties and tunable surface termination,find a wide range of applications including energy storage and energy *** this work,TiCT MXene nanosheets are applied as a novel type of electron transport layer(ETL) in low-temperature processed planar-structured perovskite solar cells(PSCs).Interestingly,simple UV-ozone treatment of the metallic TiCT that increases the surface Ti-O bonds without any change in its bulk properties like high electron mobility improves its suitability as an *** electron transfer and suppressed recombination at the ETL/perovskite interface results in augmentation of the power conversion efficiency(PCE) from 5.00% in the case of TiCT without UV-ozone treatment to the champion PCE of 17.17%,achieved using the TiCT film after 30 minutes of UV-ozone *** the first report on the use of pure MXene layer as an ETL in PSCs,this work shows great potential of MXenes to be used in PSCs and displays their promises for applications in photovoltaic technology in general.

关键词： UV-ozone treatment Ti3C2Tx MXene electron transport layers perovskite solar cells

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Performance improvement of MXene-based perovskite solar cell...