检索结果-南通市图书馆

Structure Design of Disposable Ocean Temperature Depth Sensing Probe Based on F-P Cavity and FBG

在线全文

学校读者我要写书评

暂无评论

Structure Design of Disposable Ocean Temperature Depth Sensi...

Recent advances in engineered polymeric materials for efficient photodynamic inactivation of bacterial pathogens

作者： Zhaoyue Liu Lina Zeng Ke Xu Qihan Wu Yichao Shu Xin Liao Zaijin Li Hao Chen Zhongliang Qiao Yi Qu Guojun Liu Lin Li Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Physics and Electronic Engineering Hainan Normal University

The basic principle of sensing is the combination of F-P cavity interference and fiber grating reflection.A hybrid structure sensor probe has been designed based on the combination of an F-P cavity of liquid-filled thermometer structure, and a fiber grating with an elastic diaphragm, herein F-P cavity is used for temperature sensing, and the fiber grating is used for pressure sensing.By adopting the dual optical path structure, the dual-parameter detection of temperature and depth is realized, which solves the problem of low accuracy caused by the cross response of temperature and pressure of a single sensor device and the calculation of the depth information of the ocean with empirical formulas.Compared with traditional sensors, the sensitivity is effectively improved.Theoretical analysis shows that the sensitivity of the F-P cavity with a thermometer structure filled with kerosene reaches 1.334 nm/℃, and the depth sensitivity of the fiber grating is 284.6 pm/Mpa within the ocean depth range of 0-400 m.

关键词： F-P Cavity Fiber Grating laser Sensing Liquid Filling

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Bioactive materials 2023年第3期21卷 157-174页

作者： Sathishkumar Gnanasekar Gopinath Kasi Xiaodong He Kai Zhang Liqun Xu En-Tang Kang Chongqing key laboratory for Advanced materials and Technologies of Clean Energies School of Materials and EnergySouthwest UniversityChongqing400715PR China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou571158PR China Department of Chemical and Biomolecular Engineering National University of SingaporeKent Ridge117576Singapore

Nowadays,infectious diseases persist as a global crisis by causing significant destruction to public health and the economic stability of countries worldwide.Especially bacterial infections remain a most severe concern due to the prevalence and emergence of multi-drug resistance(MDR)and limitations with existing therapeutic options.Antibacterial photodynamic therapy(APDT)is a potential therapeutic modality that involves the systematic administration of photosensitizers(PSs),light,and molecular oxygen(O_(2))for coping with bacterial infections.Although the existing porphyrin and non-porphyrin PSs were effective in APDT,the poor solubility,limited efficacy against Gram-negative bacteria,and non-specific distribution hinder their clinical applications.Accordingly,to promote the efficiency of conventional PSs,various polymer-driven modification and function-alization strategies have been adopted to engineer multifunctional hybrid phototherapeutics.This review as-sesses recent advancements and state-of-the-art research in polymer-PSs hybrid materials developed for APDT applications.Further,the key research findings of the following aspects are considered in-depth with constructive discussions:i)PSs-integrated/functionalized polymeric composites through various molecular in-teractions;ii)PSs-deposited coatings on different substrates and devices to eliminate healthcare-associated in-fections;and iii)PSs-embedded films,scaffolds,and hydrogels for regenerative medicine applications.

关键词： Antibacterial photodynamic therapy Polymers Photosensitizers Conjugation Hydrogels Biomaterials

Elevating kinetics of passivated Fe anodes with NH_(4)Cl regulator:Toward low-cost,long-cyclic and green cathode-free Fe-ion aqueous batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第4期15卷 3187-3194页

作者： Shibo Chai Jianhui Zhu Jian Jiang Chang Ming Li School of Physical Science and technology Southwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China School of materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouCollege of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

The environment benignity and battery cost are major concerns for grid-scale energy storage applications.The emerging dendrite-free Fe-ion aqueous batteries are promising due to the rich natural abundance,low cost and non-toxicity for Fe resources.However,serious passivation reactions on Fe anodes and poor long-term cyclability for matched cathodes still stand in the way for their practical usage.To settle above constraints,we herein use NH_(4)Cl as the electrolyte regulator to elevate the reaction kinetics of passivated Fe anodes,and also propose a special cathode-free design to prolong the cells lifetime over 1,000 cycles.The added NH_(4)Cl can erode/break inert passivation layers and strengthen the ion conductivity of electrolytes,facilitating the reversible Fe plating/stripping and Fe^(2+)shuttling.The highly puffed nano carbon foams function as current collectors and actives anchoring hosts,enabling expedite Fe^(2+)adsorption/desorption,FeII/FeIII redox conversions and FeIII deposition.The configured rocking-chair Fe-ion cells have good environmental benignity and decent energy-storage behaviors,including high reactivity/reversibility,outstanding cyclic stability and far enhanced operation longevity.Such economical,long-cyclic and green cathode-free Fe-ion batteries may hold great potential in near-future energy-storage power stations.

关键词： elevated kinetics passivated Fe anodes NH_(4)Cl regulator cathode-free design Fe-ion batteries

Microenvironment-responsive chemotherapeutic nanogels for enhancing tumor therapy via DNA damage and glutathione consumption

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第9期33卷 4197-4202页

作者： Mengjie Ye Yuan Gao Mengyun Liang Wei Qiu Xian bin Ma Jiming Xu Junfeng Hu Peng Xue Yuejun Kang Zhigang Xu key laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationSchool of Materials and Energy and Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and DevicesSouthwest UniversityChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

Although targeted therapy and immunotherapy are now shining in the treatment of some cancers,chemotherapy is still the cornerstone of drug treatment for many cancer patients.The emergence of chemotherapy prodrugs can improve the drug activity and reduce the side effects of chemotherapy.When used,the tumor microenvironment has characteristics different from normal tissues,and the existence of the microenvironment provided a more convenient way to design responsive nanodrugs.Herein,we designed a glutathione(GSH)-responsive prodrug nanogels for enhancing tumor chemotherapy.In the nanogels of HHNP,10-hydroxycamptothecin(HCPT)played an essential role in killing cancer cells.HCPT was jointed with a cross-linker agent with disulfide bond and was further coated with polyethylene glycol,which not only prolonged the half-life of the drug,but also made HCPT accurate transport to the tumor fractions and achieved precise and controllable release.The proposal of HHNP effectively retained the biological activity of the drug,and introduced functions such as targeting,selective release and biodegradation,which greatly improved the medical efficiency of the drug and effectively reduced the toxic and side effects.This chemotherapeutic prodrug nanogel offers a new window for constructing efficient drug delivery platform.

关键词： Nanogel Prodrug GSH-responsive DNA damage Chemotherapy

A robust bifunctional catalyst for rechargeable Zn-air batteries:Ultrathin NiFe-LDH nanowalls vertically anchored on soybeanderived Fe-N-C matrix

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第4期14卷 1175-1186页

作者： Meng Zhang Jiting Zhang Siyi Ran Lingxi Qiu Wei Sun Ying Yu Jisheng Chen Zhihong Zhu Institute of Nano-science and Nano-technology College of Physical Science and TechnologyCentral China Normal UniversityWuhan 430079China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

ABSTRACT NiFe layered double hydroxide(NiFe-LDH)nanosheets and metal-nitrogen-carbon materials(M-N-C,M=Ni,Fe,Co,etc.)are supreme catalysts in the oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)process,respectively.Nevertheless,the monotonic performance and insufficient stability severely hamper their practical application in rechargeable batteries.Herein,we simultaneously combine ultrathin NiFe-LDH nanowalls with renewable soybean-derived Fe-N-C matrix to obtain a hybrid materials(NiFe-LDH/FeSoy-CNSs-A),which exhibits robust catalytic activities for OER(E_(j=10)=1.53 V vs.RHE)and ORR(E_(1/2)=0.91 V vs.RHE),with a top-notch battery parameters and stability in assembled rechargeable Zn-air batteries.Intensive investigations indicate that the vertically dispersed NiFe-LDH nanosheets,Fe-N-C matrix derived from soybean and the strong synergy between them are responsible for the unprecedented OER and ORR performances.The key role of intrinsic N defects involved in the hybrid materials is firstly specified by ultrasoundassisted extraction of soy protein from soybean.The exquisite design can facilitate the utilization of sustainable biomass-derived catalysts,and the mechanism investigations of N defects and oxygenic groups on the structure-activity relationship can stimulate the progress of other functional hybrid electrocatalysts.

关键词： biomass Fe-N-C NiFe-LDH oxygen reduction reaction oxygen evolution reaction rechargeable Zn-air batteries

Short Pulse Width and High Peak Power 457 nm Deep Blue laser with Ⅴ-Type Cavity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Short Pulse Width and High Peak Power 457 nm Deep Blue Laser...

Metal-organic-frameworks passivated CuBi_(2)O_(4)photocathodes boost CO_(2)reduction kinetics

作者： Zhibin Zhao Cheng Cheng Hao Chen Quan Li Yi Qu Guojun Liu Zhongliang Qiao Baoxue Bo College of Opto-Electronic Engineering Changchun University of Science and Technology Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Physics and Electronic Engineering Hainan Normal University

An intracavity frequency doubling acousto-optically Q-switched Neodymium-doped Yttrium Orthvanadate(Nd:YVO) 457 nm blue laser by employing a three-mirror folded cavity was demonstrated.With the incident pump power of 40.4 W, the maximum average output power of 439 mW 457 nm laser, and the minimum pulse duration of 86.14 ns and the maximum peak power of 510 W were achieved at 10 kHz.The M factors are 1.23 and 1.61 in X and Y directions, respectively.The power stability in two hours is better than 2%.

关键词： laser All-Solid-State laser Pulse Wave Deep Blue laser 457 nm laser

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

materials Reports(Energy) 2023年第4期3卷 60-70页

作者： Jiaqi Jin Guangming Cao Yanjie Liu Yingying Shu Zhiyuan Deng Wei Sun Xiaogang Yang Institute of materials Science and Devices School of Material Science and EngineeringSuzhou University of Science and TechnologySuzhou215009PR China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu611756PR China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouCollege of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou571158PR China

Photoelectrochemical reduction of CO_(2)to produce CO with metal-organic frameworks(MOFs)is recognized as a desirable technology to mitigate CO_(2)emission and generate sustainable energy.To achieve highly efficient electrocatalyst,it is essential to design a new material interface and uncover new reaction mechanisms or kinetics.Herein,we developed two metal-organic Cu-MOF and Bi-MOF layers using benzene tricarboxylic acid(H_(3)BTC)ligands on CuBi_(2)O_(4) photocathodes.Both MOF layers drastically improved the photoelectrochemical stability by suppressing the photo-corrosion through conformal surface passivation.The Cu-MOF modified CuBi_(2)O_(4) showed more significant charge separation and transfer efficiencies than the Bi-MOF modified control.Based on the transient photocurrent curves under the applied potential of 0.6 V vs.RHE,the rate-law analysis showed the CO_(2)photoreduction took place through a first-order reaction.Further,the photoelectrochemical impedance spectra(PEIS)revealed this reaction order,representing an“operando”analysis.Moreover,the reaction rate constant on Cu-MOF modified sample was higher than that on Bi-MOF modified one and bare CuBi_(2)O_(4).Combined with the density functional theory calculation,the surface absorption of CO_(2)and CO molecules and the higher energy barrier for*COOH intermediates could significantly determine the first order reaction.

关键词： Copper bismuth oxide Carbon dioxide photoelectrochemical reduction Metal-organic framework Rate-law kinetics

Minimizing Carbon Content with Three-in-One functionalized Nano Conductive Ceramics:Toward More Practical and Safer S Cathodes of Li-S Cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy & Environmental materials 2023年第3期6卷 31-39页

作者： Ning Li Chang Sun Jianhui Zhu Shun Li Yanlong Wang Maowen Xu Changming Li Jian Jiang School of materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityChongqing 400715China School of Physical Science and technology Southwest UniversityChongqing 400715China key laboratory of Chemical lasers Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry and Chemical Engineering Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Provinceand Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouHainan Normal UniversityHaikou 571158China

Using porous carbon hosts in cathodes of Li-S cells can disperse S actives and offset their poor electrical conductivity.However,such reservoirs would in turn absorb excess electrolyte solvents to S-unfilled regions,causing the electrolyte overconsumption,specific energy decline,and even safety hazards for battery devices.To build better cathodes,we propose to substitute carbons by In-doped SnO_(2)(ITO)nano ceramics that own three-in-one functionalities:1)using conductive ITO enables minimizing the total carbon content to an extremely low mass ratio(~3%)in cathodes,elevating the electrode tap density and averting the electrolyte overuse;2)polar ITO nanoclusters can serve as robust anchors toward Li polysulfide(LiPS)by electrostatic adsorption or chemical bond interactions;3)they offer catalysis centers for liquid–solid phase conversions of S-based actives.Also,such ceramics are intrinsically nonflammable,preventing S cathodes away from thermal runaway or explosion.These merits entail our configured cathodes with high tap density(1.54 g cm^(−3)),less electrolyte usage,good security for flame retardance,and decent Li-storage behaviors.With lean and LiNO_(3)-free electrolyte,packed full cells exhibit excellent redox kinetics,suppressed LiPS shuttling,and excellent cyclability.This may trigger great research enthusiasm in rational design of low-carbon and safer S cathodes.

关键词： flame retardance Li-S cells minimized carbon ratio nano conductive ceramics three-in-one functionality

Enhancing soil aggregation and acetamiprid adsorption by ecofriendly polysaccharides hydrogel based on Ca^(2+)-amphiphilic sodium alginate

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第3期34卷 55-63页

作者： Siqi Zhang Furui He Xiuqin Fang Xinyu Zhao Yuanyuan Liu Gaobo Yu Yang Zhou Yuhong Feng Jiacheng Li key laboratory of Advanced materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and technology Hainan UniversityHainan 570228China

Soil aggregation plays an important role in agricultural production activities.However,the structure of soil aggregation is destroyed by the natural environment and unreasonable farming management,resulting in the loss of water,fertilizers and pesticides in soil.At present,hydrogels have been widely reported to promote the formation of soil aggregation.In this paper,amphiphilic calcium alginate(ASA/Ca^(2+))was applied to promote the formation of soil aggregation and enhance pesticide retention.Initially,an ASA was obtained through the one-pot Ugi condensation(a four-component green chemical reaction).Then,ASA/Ca^(2+) hydrogel is prepared by Ca^(2+) cross-linking.The formation of soil aggregation was determined through the Turbiscan Lab Expert stability analyzer,Confocal laser Scanning Microscope(CLSM),and Transmission Electron Microscope(TEM).And the effect of soil aggregation on acetamiprid environmental behavior was investigated by adsorption kinetics,adsorption isotherms,and leaching.The results shown that the three-dimensional network structure of ASA/Ca^(2+) hydrogel can promote the formation of soil aggregation.Aggregate durability index(ADI)was 0.55 in the presence of ASA/Ca^(2+) hydrogel,indicating that amphiphilic hydrogel can enhance the stability of soil aggregation.The adsorbing capacity of acetamiprid was 1.58 times higher than pure soil,and the release of acetamiprid only about 20%in the presence of ASA/Ca^(2+) hydrogel.These results would be helpful for the formation of soil aggregation and pesticides adsorption on soil aggregation.Thus,ASA/Ca^(2+) hydrogel is likely to improve soil quality,simultaneously it can minimize the mobility of pesticides in the agricultural system.

关键词： Soil aggregation Amphiphilic Hydrogel network Pesticides migration