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Scaled-up synthesis of defect-rich layered double hydroxide monolayers without organic species for efficient oxygen evolution reaction

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Green Energy & Environment 2022年第5期7卷 975-982页

作者： Haoyuan Chi Jingwen Dong Tian Li Sha Bai Ling Tan Jikang Wang Tianyang Shen Guihao Liu Lihong Liu Luyi Sun Yufei Zhao Yu-Fei Song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing100875China Polymer Program Institute of Materials Science and Department of Chemical&Biomolecular EngineeringUniversity of ConnecticutStorrsConnecticut06269USA Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing100029China

The scaled-up synthesis of organic-free monolayer nanomaterials is highly desirable,especially in obtaining green energy by *** this study,a method for the scaled-up synthesis of the series of monolayer layered double hydroxides(LDHs)without the addition of organic solvents is reported via the separate nucleation and aging steps *** resulting monolayer LDHs with the thicknesses of less than 1 nm showed a narrow thickness distribution.X-ray absorption fine-structure revealed that monolayer NiFe-LDH nanosheets have a number of oxygen and metal vacancies *** a practical application,monolayer NiFe-LDH nanosheets containing defects showed an enhanced electrocatalytic water oxidation activity compared with that of bulk *** functional theory calculations uncovered that excellent catalytic activity is attributed to vacancies *** proposed method is an economical and universally applicable strategy for the scaled-up production of monolayer LDHs.

关键词： process synthesis monolayer

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In-Situ Oxidation of Coooh Decorated on P25 Heterostructure as the Co-Catalyst for Enhanced Photodegradation of Organic Pollutants

SSRN

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SSRN 2024年

作者： Jiang, Haibo Yang, Kaina Cao, Shenyang Yu, Shengwei Sun, Xue Shou, Shengqiu Shen, Jianhua Key Laboratory for Ultrafine Materials Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai200237 China State Key Laboratory of Advanced Special Steel School of Materials Science and Engineering Shanghai University Shanghai200444 China

Surface modification of nanoscale titanium dioxide (P25) for photocatalysts can improve carrier separation efficiency by constructing heterojunction structures and reduce reaction energy barriers by introducing co-catalysts. This study describes the successful deposition of CoOOH particles on the P25 surface using solvent-based and in-situ oxidation methods, resulting in a type II P25-CoOOH heterostructure. The photocurrent of P25-CoOOH exhibited a 630% increase compared to pure P25, while showing a reduced surface potential barrier of 2.21 eV. Density functional theory (DFT) simulations demonstrated that the work function of the CoOOH (001) surface (Φ=6.639 eV) is significantly lower than that of P25 (101) (Φ=7.238 eV). Photoluminescence (PL) spectra and active species trapping experiments demonstrated a slower rate of electron and hole recombination in P25-CoOOH compared to pure P25, which effectively reduces electron-hole pair recombination and significantly enhances its photocatalytic activity for degrading methylene blue (MB) by 3.41 times that of P25. These findings suggest that CoOOH not only forms a heterojunction with P25 to improve carrier separation efficiency but also serves as a co-catalyst, increasing the number of active sites on the surface. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

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Microstructural analysis of organic matter in shale by SAXS and WAXS methods

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Petroleum science 2022年第3期19卷 979-989页

作者： Kou-Qi Liu Zhi-Jun Jin Lian-Bo Zeng Meng-Di Sun Bo Liu Ho Won Jang Majid Safaei-Farouji Mohammadreza Shokouhimer Mehdi Ostadhassan Institute of Energy Peking UniversityBeijing100871China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China State Key Laboratory of Continental Shale Accumulation and Efficient Development Ministry of EducationNortheast Petroleum UniversityDaqingHeilongjiang 163318China Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul08826Republic of Korea School of Geology College of ScienceUniversity of TehranTehranIran Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea Department of Geology Ferdowsi University of MashhadMashhadIran

Characterizing the kerogen-hosted pore structures is essential to understand the adsorption,transport and storage potential in organic-rich shale *** this paper,we first separated the organic matter(kerogen)from the mineral matrix in four different shale samples of the Bakken Formation with different thermal maturities and then analyzed their chemical compositions using the wide-angle X-ray scattering(WAXS)***,we acquired small-angle X-ray scattering(SAXS)to characterize the structure of the organic matter and see how these two will *** WAXS results showed that the isolated kerogens have high purity(free of inorganic minerals)and retain different chemical ***,SAXS analysis revealed that the isolated kerogens have similar radius of gyration(R_(g))which is around 90Åand the molecules are in the compact *** on the pore size distribution analysis from the SAXS data,two main peaks were found in all of these four samples with one peak less than 40Åand the other one larger than 1000Å.Also,the TEM images revealed that Sample 1 is abundant in pores with sizes around 20 nm while Sample 2 does not have pores of that size,which agrees with the results from the pore size distribution that was obtained from the SAXS ***,this study exhibits how different analytical instruments can provide us with useful information from complex structures of geomaterials.

关键词： Isolated kerogen Bakken shale SAXS WAXS Pore structures

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Monoclonal Antibody-conjugated Polyphosphoester-hyd-DOX Prodrug Nanoparticles for Targeted Chemotherapy of Liver Cancer Cells

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Chinese Journal of Polymer science 2021年第11期39卷 1392-1402页

作者： Ya-Kui Huang Hong-Rui Tian Ming-Zu Zhang Jin-Lin He Jian Liu Pei-Hong Ni College of Chemistry Chemical Engineering and Materials ScienceState and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisSoochow UniversitySuzhou 215123China Institute of Functional Nano and Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China

In order to overcome the limitation of traditional active nano-therapeutic drugs on tumor targeting efficiency which cannot reach the receptor/target in sufficient amount in the body,in this work,we developed a monoclonal antibody(mAb)and a polymer-hyd-doxorubicin prodrug conjugate,which enables the self-assembled nanoparticles to have precise targeting,tumor tissue aggregation and pH-sensitive drug *** first prepared an amphiphilic polymer prodrug,abbreviated as H2N-PEEP-b-PBYP-hyd-DOX,via a combination of ring-opening polymerization(ROP)and"click"chemistry,in which PEEP and PBYP represent two kinds of phosphoester segmemts,-hyd-is hydrazone *** self-assembly into prodrug nanoparticles(PDNPs)with a diameter of about 93 nm,CD147 mAb was conjugated onto the PDNPs by EDC/NHS chemistry to form *** the PDNPs and mAb-PDNPs,we also investigated their stability,in vitro drug release behavior and cellular *** results showed that the pH-responsive PDNPs can remain relatively stable under the condition of PB 7.4 buffer ***,under acidic conditions or in the presence of phosphodiesterase I(PDE I),both the amount and rate of DOX release increased at the same incubation *** assay showed that mAb-PDNPs exhibited higher cytotoxicity(IC50:1.12 mg·L^(-1))against HepG2 cells than PDNPs(IC50:2.62 mg·L^(-1))without monoclonal *** nanoparticles with antibodies mAb-PDNPs have relatively better stability and can directly achieve the targeting drug delivery through CD147 mAb.

关键词： Monoclonal antibody Polymeric prodrug Polyphosphoester Drug delivery Targeted therapy

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基于雷洛昔芬的多重刺激响应性单组分室温磷光分子晶体

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science Bulletin 2024年第9期69卷 1237-1248页

作者：潘智超宋金明张莎莎曾平梅菊曲大辉 Key Laboratory for Advanced Materials Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China

Simultaneously achieving room-temperature phosphorescence(RTP) and multiple-stimuli responsiveness in a single-component system is of significance but remains challenging. Crystallization has been recognized to be a workable strategy to fulfill the above task. However, how the molecular packing mode affects the intersystem crossing and RTP lifetime concurrently remains unclear so far. Herein, four economic small-molecular compounds, analogues of the famous drug raloxifene(RALO), are facilely synthesized and further explored as neat single-component and stimuli-responsive RTP emitters via crystallization engineering. Thanks to their simple structures and high ease to crystallize, these raloxifene analogues function as models to clarify the important role of molecular packing in the RTP and stimuliresponsiveness properties. Thorough combination of the single-crystal structure analysis and theoretical calculations clearly manifests that the tight antiparallel molecular packing mode is the key point to their RTP behaviors. Interestingly, harnessing the controllable and reversible phase transitions of the two polymorphs of RALO-OAc driven by mechanical force, solvent vapor, and heat, a single-component multilevel stimuli-responsive platform with tunable emission color is established and further exploited for optical information encryption. This work would shed light on the rational design of multi-stimuli responsive RTP systems based on single-component organics.

关键词： Crystal engineering Molecular packing Organic room-temperature phosphorescence(RTP) Polymorph Stimuli-responsiveness

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Multifunctional hydrogel enhances bone regeneration through sustained release of Stromal Cell-Derived Factor-1αand exosomes

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Bioactive materials 2023年第7期25卷 460-471页

作者： Lang Chen Chenyan Yu Yuan Xiong Kai Chen Pei Liu Adriana C.Panayi Xiufeng Xiao Qian Feng Bobin Mi Guohui Liu Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan430022China Department of Physics and Center for Hybrid Nanostructure(CHyN) University of HamburgLuruper Chaussee 149Hamburg 22761HamburgGermany Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering College of Chemistry and Materials ScienceFujian Normal UniversityFuzhouFujian350007China Division of Plastic Surgery Brigham and Women’s HospitalHarvard Medical SchoolBostonMA02215USA Key Laboratory of Biorheological Science and Technology Ministry of Education College of BioengineeringChongqing UniversityChongqing400044China

Fracture nonunion remains a great challenge for orthopedic *** repair comprises of three phases,the inflammatory,repair and remodeling *** advancements have been made in the field of bone repair,including development of strategies to balance the M1/M2 macrophage populations,and to improve osteogenesis and ***,such developments focused on only one or the latter two phases,while ignoring the inflammatory phase during which cell recruitment *** this study,we combined Stromal Cell-Derived Factor-1α(SDF-1α)and M2 macrophage derived exosomes(M2D-Exos)with a hyaluronic acid(HA)-based hydrogel precursor solution to synthesize an injectable,self-healing,adhesive HA@SDF-1α/M2D-Exos *** HA hydrogel demonstrated good biocompatibility and hemostatic ability,with the 4%HA hydrogels displaying great antibacterial activity against gram-negative *** and gram-positive *** and Methicillin-resistant Staphylococcus aureus(MRSA).Synchronously and sustainably released SDF-1αand M2D-Exos from the HA@SDF-1α/M2D-Exos hydrogel enhanced proliferation and migration of human bone marrow mesenchymal stem cell(HMSCs)and Human Umbilical Vein Endothelial Cells(HUVECs),promoting osteogenesis and angiogenesis both in vivo and in ***,the developed HA@SDF-1α/M2D-Exos hydrogel was compatible with the natural healing process of fractures and provides a new modality for accelerating bone repair by coupling osteogenesis,angiogenesis,and resisting infection at all stages.

关键词： Hydrogel SDF-1α Macrophage Exosomes Fracture healing

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Mild hyperthermia synergized chemotherapy by Bi_(2)Se_(3)/MoSe_(2)nanosaucers for cancer treatment with negligible thermal resistance

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Nano Research 2022年第9期15卷 8270-8280页

作者： Fei Gao Tingbin Zhang Yuqing Miao Huijun Ma Hui Guo Ruyi Jin Zhi Li Haifang Wang Haiming Fan Lingyun Zhao Institute of Integrative Medicine Shaanxi University of Chinese MedicineXi'an 712046China Key Laboratory of Advanced Materials Ministry of Education of ChinaSchool of Materials Science&EngineeringTsinghua UniversityBeijing 100084China College of Pharmacy Shaanxi University of Chinese MedicineXi'an 712046China Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials ScienceNorthwest UniversityXi’an 710069China Shaanxi Key Laboratory of Integrative Traditional Chinese and Western Medicine for Prevention and Treatment of Cardiovascular Diseases Institute of Integrative MedicineShaanxi University of Chinese MedicineXi'an 712046China

Harsh photothermal temperatures(>50℃)caused heating damage to the normal tissues and induced thermal resistance in cancer cells,which significantly limited the safety and efficacy of photothermal therapy(PTT)in cancer *** hyperthermia(<42℃)combined with chemotherapy might solve this ***,a novel transition metal dichalcogenides nanostructure,namely,Bi_(2)Se_(3)/MoSe_(2)nanosaucers(BMNSs),was designed to produce mild photo-hyperthermia(mPTT)and combined with chemotherapy to improve the overall antitumor *** BMNSs were constituted by Bi_(2)Se_(3)hexagonal nanoplates and enclosed with MoSe_(2)nanosheets *** the MoSe_(2)moiety endowed the nanoplatform with excellent photothermal efficacy,the Bi_(2)Se_(3)substrates provided large specific surface area to anchor more doxorubicin(DOX)molecules as chemotherapeutic *** the stimuli of mPTT/tumor acidic microenvironment,the tumor-specific drug release and the enhanced chemotherapy could be realized,showing impressive therapeutic outcomes against 4T1 *** synergetic therapeutic mechanism might be attributed to the mPTT induced cell membrane permeability,and interestingly,the expression of heat shock proteins 70 was not elevated obviously after the synergetic therapy,thus to avoid the tumor thermal resistance and further improve the therapeutic *** in vivo anti-tumoral performance of the BMNSs was further studied and complete tumor eradication was achieved without any recurrence and *** only demonstrating a paradigm of high therapeutic efficacy of mild hyperthermia and synergistic chemotherapy for precise cancer therapy,our findings proved that the cancer therapeutic effect can be improved with minimal side effects through exquisite designing of the microstructures and the physiochemical properties of the nanoplatform.

关键词： mild hyperthermia MoSe_(2)/Bi_(2)Se_(3)nanosaucers thermal resistance heat shock proteins 70

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A three-way electrolyte with ternary solvents for high-energy-density and long-cycling lithium-sulfur pouch cells

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SusMat 2024年第2期4卷 1-12页

作者： Zheng Li Legeng Yu Chen-Xi Bi Xi-Yao Li JinMa Xiang Chen Xue-Qiang Zhang Aibing Chen Haoting Chen Zuoru Zhang Li-Zhen Fan Bo-Quan Li Cheng Tang Qiang Zhang Tsinghua Center for Green Chemical Engineering Electrification Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua UniversityBeijingChina School of Materials Science and Engineering Beijing Institute of TechnologyBeijingChina Institute of Advanced Materials and Technology University of Science and TechnologyBeijingChina Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuanChina Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan UniversityJangan-GuSuwon-SiGyeonggi-DoRepublic of Korea College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuangChina Ordos Carbon Neutral Research and Application Co. Ltd.Kangbashi DistrictOrdos CityInner MongoliaChina Institute for Carbon Neutrality Tsinghua UniversityBeijingChina

Lithium–sulfur(Li–S)batteries promise high-energy-density potential to exceed the commercialized lithiumion batteries but suffer from limited cycling lifespan due to the side reactions between lithium polysulfides(LiPSs)and Li metal ***,a three-way electrolyte with ternary solvents is proposed to enable high-energy-density and long-cycling Li–S pouch ***,ternary solvents composed of 1,2-dimethoxyethane,di-isopropyl sulfide,and 1,3,5-trioxane are employed to guarantee smooth cathode kinetics,inhibit the parasitic reactions,and construct a robust solid electrolyte interphase,*** cycling lifespan of Li–S coin cells with 50μm Li anodes and 4.0 mg cm^(−2) sulfur cathodes is prolonged from88 to 222 cycles using the three-way ***-heterogeneous solvation structure of LiPSs and organic-rich solid electrolyte interphase are identified to improve the cycling stability of Li metal ***,a 3.0 Ah-level Li–S pouch cell with the three-way electrolyte realizes a high energy density of 405 Wh kg^(−1) and undergoes 27 *** affords a three-way electrolyte recipe for suppressing the side reactions of LiPSs and inspires rational electrolyte design for practical high-energy-density and long-cycling Li–S batteries.

关键词： lithium metal anodes lithium-sulfur batteries pouch cells solid electrolyte interphase three-way electrolyte

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Effects of Thermal Aging on Microstructure and Mechanical Properties of interface of Hot Isostatic Pressing Densified Low Alloy Steel with Inconel 690 Cladding

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稀有金属材料与工程 2025年第4期54卷 879-885页

作者： Yu Lei Cao Rui Ma Jinyuan Yan Yingjie Dong Hao Wang Caiqin State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Advanced Technology&Materials Co. LtdBeijing 100081China Hebei Hot Isostatic Pressing Technology Innovation Center Zhuozhou 072750China

The microstructure,micro-hardness,and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600℃.The results show that the interface region can be divided into four zones from base metal to deposited metal:carbon-depleted zone(CDZ),partial melting zone(PMZ),planar growth zone(PGZ),and brownish feature zone(BFZ).Dimensions of these zones do not significantly change during ***,type I carbides noticeably increase in size in the PMZ,and precipitates clearly occur in the *** main reason for their growth and occurrence is continuous carbon *** highest micro-hardness appears in the PGZ and BFZ regions,which is related to carbon accumulation and precipitates in these *** failure occurs on the base metal side due to the high strength mismatch between these two *** CDZ,composed of only ferrite,has lower strength and fractures at the boundary between CDZ and base *** ultimate tensile strength decreases by only 50 MPa after aging for 1500 h,and the interface region maintains high strength without significant deformation.

关键词： interface thermal aging microstructure mechanical properties hot isostatic pressing densification

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Facile assembly of flexible,stretchable and attachable symmetric microsupercapacitors with wide working voltage windows and favorable durability

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Microsystems & Nanoengineering 2024年第4期10卷 297-304页

作者： Xiangguang Han Xiaoyu Wu Libo Zhao Min Li Chen Jia Zhikang Li Jiaqi Xie Guoxi Luo Ping Yang Rabah Boukherroub Yurdanur Türker Mert UmutÖzkaynak Koray Bahadır Dönmez State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and SystemXi’an Jiaotong UniversityXi’an 710049China School of Instrument Science and Technology Xi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai 264000China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’anShaanxi 710049China Chongqing Key Laboratory of Micro-Nano Systems and Intelligent Sensing Chongqing Academician WorkstationChongqing 2011 Collaborative Innovation Center of Micro/Nano Sensing and Intelligent Ecological Internet of ThingsChongqing Technology and Business UniversityNan’an DistrictChongqing 400067China Univ.Lille CNRSUniv.Polytechnique Hauts-de-FranceUMR 8520-IEMNF-59000 LilleFrance Sabanci University Nanotechnology Research and Application Center(SUNUM) IstanbulTurkey Department of Materials Science and Engineering Istanbul Technical UniversityIstanbulTurkey

With the increasing development of intelligent robots and wearable electronics,the demand for high-performance flexible energy storage devices is drastically *** this study,flexible symmetric microsupercapacitors(MSCs)that could operate in a wide working voltage window were developed by combining laser-direct-writing graphene(LG)electrodes with a phosphoric acid-nonionic surfactant liquid crystal(PA-NI LC)gel *** increase the flexibility and enhance the conformal ability of the MSC devices to anisotropic surfaces,after the interdigitated LG formed on the polyimide(PI)film surface,the devices were further transferred onto a flexible,stretchable and transparent polydimethylsiloxane(PDMS)substrate;this substrate displayed favorable flexibility and mechanical characteristics in the bending ***,the electrochemical performances of the symmetric MSCs with various electrode widths(300,400,500 and 600μm)were *** findings revealed that symmetric MSC devices could operate in a large voltage range(0–1.5 V);additionally,the device with a 300μm electrode width(MSC-300)exhibited the largest areal capacitance of 2.3 mF cm^(−2)at 0.07 mA cm^(−2)and an areal(volumetric)energy density of 0.72μWh cm−2(0.36 mWh cm^(−3))at 55.07μWcm−2(27.54mWcm−3),along with favorable mechanical and cycling *** charging for~20 s,two MSC-300 devices connected in series could supply energy to a calculator to operate for~130 s,showing its practical application potential as an energy storage ***,the device displayed favorable reversibility,stability and *** 12 months of aging in air at room temperature,its electrochemical performance was not altered,and after charging-discharging measurements for 5000 cycles at 0.07 mA cm^(−2),~93.6%of the areal capacitance was still retained;these results demonstrated its practical long-term application potential as an energy storage device.

关键词： cycling durability electrode

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