1
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Li M, Han B, Li S, Zhang Q, Zhang E, Gong L, Qi D, Wang K, Jiang J. Constructing 2D Phthalocyanine Covalent Organic Framework with Enhanced Stability and Conductivity via Interlayer Hydrogen Bonding as Electrocatalyst for CO 2 Reduction. Small 2024:e2310147. [PMID: 38377273 DOI: 10.1002/smll.202310147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/22/2024] [Indexed: 02/22/2024]
Abstract
Fabricating COFs-based electrocatalysts with high stability and conductivity still remains a great challenge. Herein, 2D polyimide-linked phthalocyanine COF (denoted as NiPc-OH-COF) is constructed via solvothermal reaction between tetraanhydrides of 2,3,9,10,16,17,23,24-octacarboxyphthalocyaninato nickel(II) and 2,5-diamino-1,4-benzenediol (DB) with other two analogous 2D COFs (denoted as NiPc-OMe-COF and NiPc-H-COF) synthesized for reference. In comparison with NiPc-OMe-COF and NiPc-H-COF, NiPc-OH-COF exhibits enhanced stability, particularly in strong NaOH solvent and high conductivity of 1.5 × 10-3 S m-1 due to the incorporation of additional strong interlayer hydrogen bonding interaction between the O-H of DB and the hydroxy "O" atom of DB in adjacent layers. This in turn endows the NiPc-OH-COF electrode with ultrahigh CO2 -to-CO faradaic efficiency (almost 100%) in a wide potential range from -0.7 to -1.1 V versus reversible hydrogen electrode (RHE), a large partial CO current density of -39.2 mA cm-2 at -1.1 V versus RHE, and high turnover number as well as turnover frequency, amounting to 45 000 and 0.76 S-1 at -0.80 V versus RHE during 12 h lasting measurement.
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Affiliation(s)
- Mingrun Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Bin Han
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Senzhi Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qi Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Enhui Zhang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Lei Gong
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Dongdong Qi
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kang Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jianzhuang Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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2
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Liu W, Wang N, Wu Y, Zhang Q, Chen X, Li Y, Xu R. High-Rate Nonaqueous Mg-CO 2 Batteries Enabled by Mo 2 C-Nanodot-Embedded Carbon Nanofibers. Small 2024; 20:e2306576. [PMID: 37803924 DOI: 10.1002/smll.202306576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/17/2023] [Indexed: 10/08/2023]
Abstract
The widespread acceptance of nonaqueous rechargeable metal-gas batteries, known for their remarkably high theoretical energy density, faces obstacles such as poor reversibility and low energy efficiency under high charge-discharge current densities. To tackle these challenges, a novel catalytic cathode architecture for Mg-CO2 batteries, fabricated using a one-pot electrospinning method followed by heat treatment, is presented. The resulting structure features well-dispersed molybdenum carbide nanodots embedded within interconnected carbon nanofibers, forming a 3D macroporous conducting network. This cathode design enhances the volumetric efficiency, enabling effective discharge product deposition, while also improving electrical properties and boosting catalytic activity. This enhancement results in high discharge capacities and excellent rate capabilities, while simultaneously minimizing voltage hysteresis and maximizing energy efficiency. The battery exhibits a stable cycle life of over 250 h at a current density of 200 mA g-1 with a low initial charge-discharge voltage gap of 0.72 V. Even at incredibly high current densities, reaching 1600 mA g-1 , the battery maintains exceptional performance. These findings highlight the crucial role of cathode architecture design in enhancing the performance of Mg-CO2 batteries and hold promise for improving other metal-gas batteries that involve deposition-decomposition reactions.
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Affiliation(s)
- Wenbo Liu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Ning Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yongjun Wu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qianyi Zhang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiaoyan Chen
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yanmei Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Rui Xu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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3
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Liu X, Liu C, Song X, Ding X, Wang H, Yu B, Liu H, Han B, Li X, Jiang J. Cofacial porphyrin organic cages. Metals regulating excitation electron transfer and CO 2 reduction electrocatalytic properties. Chem Sci 2023; 14:9086-9094. [PMID: 37655043 PMCID: PMC10466316 DOI: 10.1039/d3sc01816d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 07/28/2023] [Indexed: 09/02/2023] Open
Abstract
Herein, we introduce a comprehensive study of the photophysical behaviors and CO2 reduction electrocatalytic properties of a series of cofacial porphyrin organic cages (CPOC-M, M = H2, Co(ii), Ni(ii), Cu(ii), Zn(ii)), which are constructed by the covalent-bonded self-assembly of 5,10,15,20-tetrakis(4-formylphenyl)porphyrin (TFPP) and chiral (2-aminocyclohexyl)-1,4,5,8-naphthalenetetraformyl diimide (ANDI), followed by post-synthetic metalation. Electronic coupling between the TFPP donor and naphthalene-1,4 : 5,8-bis(dicarboximide) (NDI) acceptor in the metal-free cage is revealed to be very weak by UV-vis spectroscopic, electrochemical, and theoretical investigations. Photoexcitation of CPOC-H2, as well as its post-synthetic Zn and Co counterparts, leads to fast energy transfer from the triplet state porphyrin to the NDI unit according to the femtosecond transient absorption spectroscopic results. In addition, CPOC-Co enables much better electrocatalytic activity for CO2 reduction reaction than the other metallic CPOC-M (M = Ni(ii), Cu(ii), Zn(ii)) and monomeric porphyrin cobalt compartment, supplying a partial current density of 18.0 mA cm-2 at -0.90 V with 90% faradaic efficiency of CO.
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Affiliation(s)
- Xiaolin Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Chenxi Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Xiaojuan Song
- School of Materials Science and Engineering China University of Petroleum (East China) Qingdao 266580 China
| | - Xu Ding
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Hailong Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Baoqiu Yu
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Heyuan Liu
- School of Materials Science and Engineering China University of Petroleum (East China) Qingdao 266580 China
| | - Bin Han
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Xiyou Li
- School of Materials Science and Engineering China University of Petroleum (East China) Qingdao 266580 China
| | - Jianzhuang Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China
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4
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Cui C, Zhang Y, Wladyka MA, Wang T, Song W, Niu K. Ultrasound-Assisted Adsorption of Perchlorate Using Calcined Hydrotalcites and the Thermal Stabilization Effect of Recycled Adsorbents on Poly(vinyl chloride). ACS Omega 2023; 8:17689-17698. [PMID: 37251198 PMCID: PMC10210281 DOI: 10.1021/acsomega.3c00176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/09/2023] [Indexed: 05/31/2023]
Abstract
Due to their high anion exchange and memory effect, the layered double hydroxides (LHDs) have wide applications for some areas. In this work, an efficient and green recycling route for layered double hydroxide based adsorbents is proposed specifically for application as a poly(vinyl chloride) (PVC) heat stabilizer without requiring secondary calcination. Conventional magnesium-aluminum hydrotalcite was synthesized using the hydrothermal method followed by removal of carbonate anion (CO32-) between LDH layers by calcination. The adsorption of perchlorate anion (ClO4-) by the memory effect of calcined LDHs with and without ultrasound assistance was compared. Using ultrasound assistance, the maximum adsorption capacity of the adsorbents (291.89 mg/g) was increased, and the adsorption process was fitted using the kinetic Elovich rate equation (R2 = 0.992) and Langmuir adsorption model (R2 = 0.996). This material was characterized using XRD, FT-IR, EDS, and TGA which demonstrated that ClO4- was intercalated into the hydrotalcite layer successfully. The recycled adsorbents were used to augment a commercial calcium-zinc-based PVC stabilizer package applied in a epoxidized soybean oil plasticized cast sheet which is based on an emulsion type PVC homopolymer resin. Use of perchlorate intercalated LDH augmentation yielded significant improvement to static heat resistance as indicated by the degree of discoloration with a life extension of approximately 60 min. The improved stability was corroborated by evaluation of HCl gas evolved during thermal degradation using conductivity change curves and the Congo red test.
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Affiliation(s)
- Changwei Cui
- School
of Materials Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, PR China
- Global
Innovation Center, Canadian General Tower
Changshu Co. Ltd., Suzhou 215500, PR China
| | - Youhao Zhang
- Global
Innovation Center, Canadian General Tower
Changshu Co. Ltd., Suzhou 215500, PR China
| | - Michael A. Wladyka
- Global
Innovation Center, Canadian General Tower
Changshu Co. Ltd., Suzhou 215500, PR China
| | - Tianyu Wang
- School
of Materials Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, PR China
- Global
Innovation Center, Canadian General Tower
Changshu Co. Ltd., Suzhou 215500, PR China
| | - Weifeng Song
- Global
Innovation Center, Canadian General Tower
Changshu Co. Ltd., Suzhou 215500, PR China
| | - Kangmin Niu
- School
of Materials Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, PR China
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5
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Zhang HJ, Wang Y, Jiang JD. Drug-gut Microbiome Interaction in Atherosclerosis Therapeutics. Curr Drug Metab 2023; 24:482-492. [PMID: 37038289 DOI: 10.2174/1389200224666230410094806] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 02/20/2023] [Accepted: 03/06/2023] [Indexed: 04/12/2023]
Abstract
Atherosclerosis (AS) is one of the major risk factors for cardiovascular disease pathogenesis, and current studies have found that the development of atherosclerosis is closely related to the intestinal microbiome. This review describes the relationship between the development of atherosclerosis and the gut microbiome with its metabolites and reviews the interactions between atherosclerosis-related drugs and the intestinal microbiome, especially the in vivo metabolic effects of the intestinal microbiome on drugs related to the treatment of atherosclerosis, to provide further understanding for the development of drugs based on the intestinal microbiome to treat atherosclerosis.
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Affiliation(s)
- Hao-Jian Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, 100050, China
| | - Yan Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, 100050, China
| | - Jian-Dong Jiang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, 100050, China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, 100050, China
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6
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Bai J, Wang Y, Wang Y, Zhang T, Dong G, Geng D, Zhao D. Temperature-Induced Structure Transformation from Co 0.85Se to Orthorhombic Phase CoSe 2 Realizing Enhanced Hydrogen Evolution Catalysis. ACS Omega 2022; 7:15901-15908. [PMID: 35571852 PMCID: PMC9097193 DOI: 10.1021/acsomega.2c01020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 03/24/2022] [Indexed: 06/15/2023]
Abstract
Transition-metal chalcogenides (TMC) have been widely studied as active electrocatalysts toward the hydrogen evolution reaction due to their suitable d-electron configuration and relatively high electrical conductivity. Herein, we develop a feasible method to synthesize an orthorhombic phase of CoSe2 (o-CoSe2) from the regeneration of Co0.85Se, where the temperature plays a key role in controlling the structure transformation. To the best of our knowledge, this is the first report about this synthetic route for o-CoSe2. The resulting o-CoSe2 catalysts exhibit enhanced hydrogen evolution reaction performance with an overpotential of 220 mV to reach 10 mA cm-2 in 1.0 M KOH. Density functional theory calculations further reveal that the change in the Gibbs free energy of hydrogen, water adsorption energy, and the downshifted d-band center make o-CoSe2 more suitable for accelerating the HER process.
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Affiliation(s)
- Jing Bai
- Beijing
Advanced Innovation Center for Materials Genome Engineering, School
of Material Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, People’s Republic of China
- Shunde
Graduate School, University of Science and
Technology Beijing, Foshan 528000, People’s Republic
of China
| | - Yechen Wang
- Beijing
Advanced Innovation Center for Materials Genome Engineering, School
of Material Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, People’s Republic of China
| | - Yange Wang
- Beijing
Advanced Innovation Center for Materials Genome Engineering, School
of Material Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, People’s Republic of China
| | - Tiantian Zhang
- Beijing
Advanced Innovation Center for Materials Genome Engineering, School
of Material Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, People’s Republic of China
| | - Gang Dong
- Beijing
Advanced Innovation Center for Materials Genome Engineering, School
of Material Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, People’s Republic of China
| | - Dongsheng Geng
- Beijing
Advanced Innovation Center for Materials Genome Engineering, School
of Material Science and Engineering, University
of Science and Technology Beijing, Beijing 100083, People’s Republic of China
| | - Dongjie Zhao
- Institute
for Future, School of Automation, Qingdao
University, Qingdao 266071, People’s Republic
of China
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7
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Dang H, Wang G, Yu C, Ning X, Zhang J, Zhang N, Gao Y, Xu R, Wang C. Study on Chemical Bond Dissociation and the Removal of Oxygen-Containing Functional Groups of Low-Rank Coal during Hydrothermal Carbonization: DFT Calculations. ACS Omega 2021; 6:25772-25781. [PMID: 34632233 PMCID: PMC8495868 DOI: 10.1021/acsomega.1c03866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Indexed: 06/13/2023]
Abstract
The molecular structure model of lignite was constructed, and the dissociation and removal mechanism of different C-O bonds and oxygen-containing functional groups was investigated using density functional theory (DFT) calculations. First, the bond order and bond dissociation enthalpy (BDE) were analyzed to predict the strength of different chemical bonds, and differences in the BDE and bond order were related to the difference in the fragment structure and electronic effects. The first group to break during hydrothermal carbonization (HTC) is the methyl of Ph(CO)O-CH3, followed by the C-O of CH3-OC(O)OH; the hydroxyl in Ph-OH is the most thermally stable group, followed by the hydroxyl in CH3OC(O)-OH. In addition, the orbital localization analysis has also been carried out. All three chemical bonds of Ph(CO)OCH3 show the characteristics of σ bond, while Ph(C=O)OCH3 and Ph(CO)-OCH3 with the Mayer bond order (MBO) greater than 1 also contains certain π bond characteristics. The lignite van der Waals (vdW) surface electrostatic potential (ESP) was constructed and visualized, and the results showed that the oxygen-containing functional groups mainly contributed to the area with a large absolute ESP. Finally, weak interactions between water molecules and lignite at different sites were described by independent gradient model (IGM) analysis. Models A, B, and E formed weak interactions with the hydrogen bond as the main force; model E showed the weakest hydrogen bond, while model C showed van der Waals interaction as the dominant force. In addition, some steric effect was also observed in model D.
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Affiliation(s)
- Han Dang
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Guangwei Wang
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Chunmei Yu
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Xiaojun Ning
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Jianliang Zhang
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Nan Zhang
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Yi Gao
- Laboratory
for Thermal Science and Power Engineering of MOE, Tsinghua University, Beijing 100084, China
| | - Runsheng Xu
- School
of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian, Beijing 100083, China
| | - Chuan Wang
- Swerim
AB, SE-971 25 Luleå, Sweden
- Thermal
and Flow Engineering Laboratory, Åbo
Akademi University, Åbo FI-20500, Finland
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8
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Chen C, Zhou K, Zha M, Qu X, Guo X, Chen H, Wang Z, Xiao R. An Effective Deep Neural Network for Lung Lesions Segmentation From COVID-19 CT Images. IEEE Trans Industr Inform 2021; 17:6528-6538. [PMID: 37981911 PMCID: PMC8545014 DOI: 10.1109/tii.2021.3059023] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/10/2021] [Accepted: 01/30/2021] [Indexed: 11/15/2023]
Abstract
Automatic segmentation of lung lesions from COVID-19 computed tomography (CT) images can help to establish a quantitative model for diagnosis and treatment. For this reason, this article provides a new segmentation method to meet the needs of CT images processing under COVID-19 epidemic. The main steps are as follows: First, the proposed region of interest extraction implements patch mechanism strategy to satisfy the applicability of 3-D network and remove irrelevant background. Second, 3-D network is established to extract spatial features, where 3-D attention model promotes network to enhance target area. Then, to improve the convergence of network, a combination loss function is introduced to lead gradient optimization and training direction. Finally, data augmentation and conditional random field are applied to realize data resampling and binary segmentation. This method was assessed with some comparative experiment. By comparison, the proposed method reached the highest performance. Therefore, it has potential clinical applications.
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Affiliation(s)
- Cheng Chen
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Kangneng Zhou
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Muxi Zha
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Xiangyan Qu
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Xiaoyu Guo
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Hongyu Chen
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Zhiliang Wang
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
| | - Ruoxiu Xiao
- School of Computer and Communication EngineeringUniversity of Science and Technology BeijingBeijing100083China
- Institute of Artificial IntelligenceUniversity of Science and Technology BeijingBeijing100083China
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9
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Sun L, Wang J, Yang B, Wang X, Yang G, Wang X, Jiang Y, Wang T, Jiang J. Assembled small organic molecules for photodynamic therapy and photothermal therapy. RSC Adv 2021; 11:10061-10074. [PMID: 35423511 PMCID: PMC8695661 DOI: 10.1039/d1ra00579k] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 03/02/2021] [Indexed: 01/22/2023] Open
Abstract
As a worldwide major public health problem, cancer is one of the leading causes of death. Effective treatment of cancer is an important challenge. Therefore, photodynamic therapy (PDT) and photothermal therapy (PTT) have been widely applied as anti-tumour strategies due to their high-performance and limited side effects. Inspired by natural supramolecular architectures, such as cytochromes and photosystems, the hierarchical supramolecular assembly of small organic molecules has been developed for their use as photosensitizers or photothermal agents for PDT and PTT, respectively. In this manuscript, we will summarize the recent progress of PDT and PTT based on the assembly of small organic molecules.
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Affiliation(s)
- Lixin Sun
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Jian Wang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Baochan Yang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Xinxin Wang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Gengxiang Yang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Xiqian Wang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Yuying Jiang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Tianyu Wang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
| | - Jianzhuang Jiang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing Beijing 100083 China
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10
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Zhang W, Tian Q, Chen Z, Zhao C, Chai H, Wu Q, Li W, Chen X, Deng Y, Song Y. Arrayed nanopore silver thin films for surface-enhanced Raman scattering. RSC Adv 2020; 10:23908-23915. [PMID: 35517352 PMCID: PMC9055119 DOI: 10.1039/d0ra03803b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/08/2020] [Indexed: 12/20/2022] Open
Abstract
Active substrates are crucial for surface-enhanced Raman scattering (SERS). Among these substrates, large uniform area arrayed nanoporous silver thin films have been developed as active substrates. Arrayed nanoporous silver thin films with unique anisotropic morphologies and nanoporous structures can be fabricated onto the nanoporous anodic aluminum oxide (AAO) of controlled pore size and interspacing by precisely tuning the sputtering parameters. These thin films preserve locally enhanced electromagnetic fields by exciting the surface plasmon resonance, which is beneficial for SERS. In this study, nanoporous silver thin films were transferred into polymethylmethacrylate (PMMA) and polydimethylsiloxane (PDMS) substrates using our recently invented template-assisted sol-gel phase inverse-imprinting process to form two different nanopore thin films. The as-formed Ag nanoporous thin films on PMMA and PDMS exhibited intensively enhanced SERS signals using Rhodamine 6G (R6G) as the model molecule. The two nanopore thin films exhibited opposite pore size-dependent SERS tendencies, which were elucidated by the different enhancement tendencies of the electric field around pores of different diameters. In particular, the Ag nanoporous thin film on PMMA exhibited an R6G detection limit of as low as 10-6 mol L-1, and the SERS enhancement factor (EF) was more than 106. The low detection limit and large EF demonstrated the high sensitivity of the as-prepared SERS substrates for label-free detection of biomolecules. Compared with conventional smooth films, this nanopore structure can facilitate future application in biomolecular sensors, which allows the detection of single molecules via an electronic readout without requirement for amplification or labels.
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Affiliation(s)
- Weiwei Zhang
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
- Shunde Graduate School of University of Science and Technology Beijing Daliang Zhihui Road 2, Shunde Distinct Foshan 528399 China
| | - Qingkun Tian
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
| | - Zhanghua Chen
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
| | - Cuicui Zhao
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
| | - Haishuai Chai
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
| | - Qiong Wu
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
| | - Wengang Li
- Xiangan Affiliated Hospital, Xiamen University Siming North Road 422, Siming District Xiamen Fujian 361005 China
| | - Xinhua Chen
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, School of Medicine, Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Zhejiang University Hangzhou 310003 China
| | - Yida Deng
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University Weijin Road 92, Nankai District Tianjin 300350 China
| | - Yujun Song
- Centre for Modern Physics Technology, School of Mathematics and Physics, University of Science and Technology, Beijing Xueyuan Road 30, Haidian District Beijing 100083 China
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Abstract
Since the late 1990s, particularly since the global financial crisis, the core inflation of main developed economies' has been persistently below target. The factors hindering the achievement of inflation targets are nothing more than commodity price, oil supply, weakness of aggregate demand, and various other factors. In addition, technology and globalization have also played a significant role. This paper uses an extended hybrid New Keynesian Phillips Curve (NKPC) model to quantify the contribution of technology and globalization variables to inflation in the United States (U.S.). The analysis suggests that technology and globalization well explain the low inflation dynamics in the U.S., as the impact of globalization on domestic inflation has been weakening over the past 20 years or so, while the impact of technology on inflation has been increasing. At present, technology exerts a greater role than globalization on low-inflation in the U.S.. This raises a different perspective for understanding the phenomenon of low inflation in the U.S. and other regions.
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Affiliation(s)
- Lei Lv
- School of Economics and Management, Beihang University, Beijing, China
| | - Zhixin Liu
- School of Economics and Management, Beihang University, Beijing, China
| | - Yingying Xu
- University of Science & Technology Beijing, Beijing, China
- * E-mail:
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