检索结果-南通市图书馆

BiVO_(4)/CoPc S型异质结的构建及其光热增强光催化性能

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2024年第2期67卷 550-561页

作者：龙子洋郑相阳史海峰 School of Science Jiangnan UniversityWuxi 214122China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China

光热催化降解去除污染物对解决环境问题具有独特的优势.本文通过水热法结合超声处理的方法合成了BiVO4/CoPc S型异质结光热催化材料.实验结果表明,BVO-1%CoPc在10分钟内对四环素对降解率可达76%,相比钒酸铋单质提高了1.8倍.进一步的红... 详细信息

光热催化降解去除污染物对解决环境问题具有独特的优势.本文通过水热法结合超声处理的方法合成了BiVO4/CoPc S型异质结光热催化材料.实验结果表明,BVO-1%CoPc在10分钟内对四环素对降解率可达76%,相比钒酸铋单质提高了1.8倍.进一步的红外热成像仪表明酞菁钴(CoPc)的光热效应可以提高反应体系的温度.同时,研究人员还发现降解后的中间产物毒性显著降低.光致发光光谱的结果表明,合成的复合材料可以增强光生载流子的分离能力.基于捕获实验、能带结构和原位XPS等研究结果,我们提出了光生电荷在合成的催化剂中的S型传输机制.本工作为设计和开发用于去除有机污染物的S型光热催化材料提供了一种可行的策略.

关键词： BiVO_(4) CoPc photothermal effect S-scheme heterojunction tetracycline

A wideband,high-resolution vector spectrum analyzer for integrated photonics

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 760-771页

作者： Yi-Han Luo Baoqi Shi Wei Sun Ruiyang Chen Sanli Huang Zhongkai Wang Jinbao Long Chen Shen Zhichao Ye Hairun Guo Junqiu Liu International Quantum Academy 518048 ShenzhenChina. Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology518055 ShenzhenChina. Department of Optics and Optical Engineering University of Science and Technology of China230026 HefeiChina. Hefei National Laboratory University of Science and Technology of China230088 HefeiChina. Qaleido Photonics 518048 ShenzhenChina. Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University200444 ShanghaiChina

The analysis of optical spectra—emission or absorption—has been arguably the most powerful approach for discovering and understanding *** invention and development of many kinds of spectrometers have equipped us with versatile yet ultra-sensitive diagnostic tools for trace gas detection,isotope analysis,and resolving hyperfine structures of atoms and *** proliferating data and information,urgent and demanding requirements have been placed today on spectrum analysis with ever-increasing spectral bandwidth and frequency *** requirements are especially stringent for broadband laser sources that carry massive information and for dispersive devices used in information processing *** addition,spectrum analyzers are expected to probe the device’s phase response where extra information is *** we demonstrate a novel vector spectrum analyzer(VSA)that is capable of characterizing passive devices and active laser sources in one *** a dual-mode VSA can measure loss,phase response,and dispersion properties of passive *** also can coherently map a broadband laser spectrum into the RF *** VSA features a bandwidth of 55.1 THz(1260–1640 nm),a frequency resolution of 471 kHz,and a dynamic range of 56 ***,our fiber-based VSA is compact and *** requires neither high-speed modulators and photodetectors nor any active feedback ***,we employ our VSA for applications including characterization of integrated dispersive waveguides,mapping frequency comb spectra,and coherent light detection and ranging(LiDAR).Our VSA presents an innovative approach for device analysis and laser spectroscopy,and can play a critical role in future photonic systems and applications for sensing,communication,imaging,and quantum information processing.

关键词： spectrum resolution coherent

The integration of dinitropyrazole and 1,3,4-oxadiazole:A novel hybrid heterocyclic skeleton for balancing energy and stability

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第6期24卷 122-128页

作者： Xiao-xiao Zheng Ting-ou Yan Lei Qian Hong-wei Yang Guang-bin Cheng School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China

In this study,a new energetic hybrid skeleton was constructed through the integration of nitropyrazole and 1,3,4-oxadiazole skeletons in a ***,the energetic precursor(2),the azo-bridged compound(3),the neutral nitramine(4)and the corresponding energetic salts(5-7)were *** physicochemical and energetic properties we re experimentally and theo retically *** the developed compounds,the azo-bridged compound(3)and dihydroxylammoinium(6)display high detonation performances(3,D_(v)=8904 m/s,P=34.47 GPa;6,D_(v)=9025 m/s,P=34.66 GPa),moderate sensitivities(3,IS=16 J,FS=120 N;6,IS=20 J,FS=312 N)and good densities(3,1.87 g/cm^(3);6,1.81 g/cm^(3)),which indicates that they have the potential to replace the traditional high-energy explosive *** results show that the integration of different energetic skeletons can achieve a good balance between energy and sensitivity.

关键词： Heterocycle Azo-bridged Hybrid skeletons Energetic materials

The skeleton of 5,7-fused bicyclic imidazole-diazepine for heat-resistant energetic materials

在线全文

学校读者我要写书评

暂无评论

Defence Technology(防务技术) 2023年第9期27卷 193-199页

作者： Xiaoxiao Zheng Yubing Xue Changhao Dai Hongwei Yang Guangbin Cheng School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China

In light of the low yields and complex reaction routes of some well-known 5,5-fused and 5,6-fused bicyclic compounds,a series of 5,7-fused bicyclic imidazole-diazepine compounds were developed with high yields by only two efficient ***,the seven-membered heterocyclic ring has a stable energetic skeleton with multiple modifiable ***,the 5,7-fused bicyclic energetic compounds were rarely reported in the area of energetic *** neutral compounds 1,2 and 4 were synthesized in this *** improve the detonation performances of the 5,7-fused neutral compounds,corresponding perchlorate 1a and 2a were further *** physicochemical and energetic performances of all newly developed compounds were experimentally *** newly prepared energetic compounds exhibit high decomposition temperatures(Td:243.8-336℃)and low mechanical sensitivities(IS:>15 J,FS:>280 N).Among them,the velocities performances of 1a(Dv=7651 m/s)and 4(Dv=7600 m/s)are comparable to that of typical heat-resistant energetic material HNS(Dv=7612 m/s).Meanwhile,the high decomposition temperature and low mechanical sensitivities(Td=336℃;IS=32 J;FS>353 N)of 4 are superior to that of HNS(Td=318℃;IS=5 J;FS=250 N).Hence,the 5,7-fused bicyclic compounds with high thermostability,low sensitivities and adjustable detonation performance have a clear tendency to open up a new space for the development of heat-resistant energetic materials.

关键词： Imidazole-diazepine Heat-resistant material 5,7-Fused skeleton Energetic materials

Fluorine-containing drugs approved by the FDA in 2021

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2023年第1期34卷 29-38页

作者： Jingrui He Ziyi Li Gagan Dhawan Wei Zhang Alexander E.Sorochinsky Greg Butler Vadim A.Soloshonok Jianlin Han Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Department of Biomedical Science Acharya Narendra Dev CollegeUniversity of DelhiNew Delhi 110019India Department of Chemistry University of Massachusetts BostonBostonMA 02125United States V.P.Kukhar Institute of Bioorganic Chemistry and Petrochemistry The National Academy of Sciences of UkraineKyiv 02094Ukraine Oakwood Chemical Inc.EstillSC 29918United States Department of Organic Chemistry I Faculty of ChemistryUniversity of the Basque Country UPV/EHU20018 San SebastiánSpain IKERBASQUE Basque Foundation for SciencePlaza Bizkaia48013 BilbaoSpain

Nine new fluorine-containing drugs have been approved by the US Food and Drug Administration(FDA)in 2021,which are presented in this review *** small molecular drugs feature aromatic fluorine,trifluoromethyl and chlorodifluoro *** therapeutic areas of these fluorine-containing drugs include multiple myeloma,lymphoma,HIV,chronic heart failure,chronic myeloid leukemia,(ANCA)-associated vasculitis,migraines,von Hippel-Lindau disease,and non-small cell lung *** brief biological activities and the synthetic methods have been discussed in this review for each of these nine drugs.

关键词： Fluorine-containing compounds Blockbuster drugs Pharmaceuticals Anti-cancer Drug design and development Asymmetric synthesis

A systematic review of steel bridge deck pavement in China

在线全文

学校读者我要写书评

暂无评论

Journal of Road Engineering 2023年第1期3卷 1-15页

作者： Leilei Chen Xinyuan Zhao Zhendong Qian Jiaqi Li Intelligent Transportation System Research Center Southeast UniversityNanjing 211189China

As an important part of steel bridge deck,the engineering quality and service condition of steel bridge deck pavement(SBDP)directly affects the capacity and operational efficiency of the *** paper reviews the history of the development of SBDP in China over the past 20 years from the exploration stage,rapid development stage and prosperity *** development and application of SBDP at different stages are discussed in terms of materials,structure,design,performance evaluation,maintenance and rehabilitation,*** advantages and disadvantages of different pavement materials and structures,and the application of different research methods are *** review shows that the improvement of pavement materials and structures and the development of new materials should be further studied on the multi-scale to enhance the durability of pavement materials,so as to extend the service life of *** design method of SBDP related to the synergistic effect of vehicle,pavement and bridge should be established,and the design concept and method standard of rigid base pavement structure should be improved and formulate a complete design *** addition,multi-disease intelligent identification system and equipment should be studied to track the entire course of disease development in real *** it is necessary to develop appropriate algorithms to select and classify the complex data of disease and maintenance history.

关键词： Steel bridge deck pavement Pavement material and structure Pavement design Service performance Maintenance and rehabilitation

Effect of cooked rice with added fructo-oligosaccharide on faecal microorganisms investigated by in vitro digestion and fermentation

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2023年第2期12卷 662-668页

作者： Fei Pei Wen Li Xiaolei Ni Xinyang Sun Yijun Yao Yong Fang Wenjian Yang Qiuhui Hu College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing Nanjing University of Finance and EconomicsNanjing 210023China Department of Food and Human Nutritionl Sciences University of ManitobaWinnipeg MB R3T 2N2Canada

In the present study,the effects of cooked rice(CR)with added fructo-oligosaccharide(FOS)on faecal flora were studied by a simulated in vitro digestion and fermentation *** total carbohydrate content,p H,and s hort-chain fatty acids(SCFAs)were determined during in vitro digestion and *** change in the bacterial phase distribution after the fermentation was also *** results showed that t he total carbohydrate content of the CR with added FOS(FCR)significantly decreased during the simulated ***,the p H of the FCR decreased and the SCFAs concentration increased significantly compared to those of the CR during the simulated *** addition,the FCR showed the advantage of promoting beneficial bacteria,such as Bifidobacterium and Lactobacillus,and inhibiting harmful bacteria,such as Bacteroides and Klebsiella compared to the ***,the FOS as a prebiotic could be recommended to produce the high-quality healthy rice food.

关键词： Fructo-oligosaccharide In vitro Fermentation Rice Short-chain fatty acids Bacterial phase distribution

Ingeniously designed Ni-Mo-S/ZnIn_(2)S_(4) composite for multi-photocatalytic reaction systems

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第3期33卷 1468-1474页

作者： Jing Chen Yumei Tang Shihao Wang Lingbin Xie Cheng Chang Xiaolei Cheng Mingming Liu Longlu Wang Lianhui Wang College of Electronic and Optical Engineering&College of Microelectronics Jiangsu Province Engineering Research Center for Fabrication and Application of Special Optical Fiber Materials and DevicesNanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)&Institute of Flexible Electronics(Future Technology)Nanjing University of Posts and TelecommunicationsNanjing 210023China

Molybdenum disulfide (MoS_(2)) with low cost, high activity and high earth abundance has been found to be a promising catalyst for the hydrogen evolution reaction (HER), but its catalytic activity is considerably limited due to its inert basal planes. Here, through the combination of theory and experiment, we propose that doping Ni in MoS_(2) as catalyst can make it have excellent catalytic activity in different reaction systems. In the EY/TEOA system, the maximum hydrogen production rate of EY/Ni-Mo-S is 2.72 times higher than that of pure EY, which confirms the strong hydrogen evolution activity of Ni-Mo-S nanosheets as catalysts. In the lactic acid and Na_(2)S/Na_(2)SO_(3) systems, when Ni-Mo-S is used as co-catalyst to compound with ZnIn_(2)S_(4) (termed as Ni-Mo-S/ZnIn_(2)S_(4)), the maximum hydrogen evolution rates in the two systems are 5.28 and 2.33 times higher than those of pure ZnIn_(2)S_(4), respectively. The difference in HER enhancement is because different systems lead to different sources of protons, thus affecting hydrogen evolution activity. Theoretically, we further demonstrate that the Ni-Mo-S nanosheets have a narrower band gap than MoS_(2), which is conducive to the rapid transfer of charge carriers and thus result in multi-photocatalytic reaction systems with excellent activity. The proposed atomic doping strategy provides a simple and promising approach for the design of photocatalysts with high activity and stability in multi-reaction systems.

关键词： Molybdenum disulfide(MoS_(2)) Ni-Mo-S nanosheets Multi-reaction systems Hydrogen evolution reaction(HER) Atomic doping strategy

Microstructure and magnetic properties evolution of Al/CoCrFeNi nanocrystalline high-entropy alloy composite

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第6期41卷 2038-2046页

作者： Jun-Jie Wang Zong-De Kou Shu Fu Shang-Shu Wu Si-Nan Liu Meng-Yang Yan Di Wang Si lan Horst Hahn Tao Feng School of Material Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing Universily of Science and TechnologyNanjing 210094China Institute of Nanotechnology Karlsruhe Institule of TechnologyKarlsruhe 76021Germany

A systematic microstructure-oriented magnetic property investigation for Al/CoCrFeNi nanocrystalline high-entropy alloys composite(nc-HEAC)is *** the initial state,the Al/CoCrFeNi nc-HEAC is composed of face-centered cubic(FCC)-Al,FCC-CoCrFeNi and hexagonal close-packed(HCP)-CoNi *** energy synchrotron radiation X-ray diffraction and high-resolution transmission electron microscopy were used to reveal the relationship between microstructure evolution and mag-netic mechanism of Al/CoCrFeNi nc-HEAC during heat *** low-temperature annealing stage,the mag-netic properties are mainly contributed by the HCP-CoNi *** the increase of temperature,the diffusion-in-duced phase transition process including the transformation of AlCoCrFeNi HEA from FCC to BCC structure and the growth of B2 phase plays a dominant role in the magnetic *** was found that the magnetic properties can be effectively regulated through the control of the thermal diffusion *** nano dual-phase thermal diffusion-induced phase transition behavior of nanocomposites pre-pared based on laser-IGC technology provides guidance for the diffusion process and microstructure evolution of two phases in composites.

关键词： Nanocry salline high-entropy alloy composites Diffusion-induced phase transition Magnetic Laser-inert gas condensation