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Benzenesulfonic acid-grafted UIO-66 with improved hydrophobicity as a stable Brønsted acid catalyst

Frontiers of Chemical Science and Engineering 2023年第10期17卷 1389-1398页

作者： Zongliang Kou Guanlun Sun Qiuyan Ding Hong Li Xin Gao Xiaolei Fan Xiaoxia Ou Qinhe pan School of Chemical Engineering and Technology National Engineering Research Center of Distillation TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Department of Chemical Engineering School of EngineeringThe University of ManchesterManchester M139PLUK Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315100China Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources School of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China

Hydrothermal and catalytic stability of UIO-66 MOFs with defective structures are critical aspects to be considered in their catalytic applications,especially under the conditions involving water,moisture and/or ***,we report a facile strategy to introduce the macromolecular acid group to UIO-66 to improve the stability of the resulting UIO-66−PhSO3H MOF in aqueous phase *** detail,UIO-66−PhSO3H was obtained by grafting benzenesulfonic acid on the surface of the pristine UIO-66 to introduce the hydrophobicity,as well as the Brønsted acidity,then assessed using catalytic hydrolysis of cyclohexyl acetate(to cyclohexanol)in *** introduction of hydrophobic molecules to UIO-66 could prevent the material from being attacked by hydroxyl polar molecules effectively,explaining its good structural stability during ***-66−PhSO3H promoted the conversion of cyclohexyl acetate at ca.87%,and its activity and textural properties were basically intact after the cyclic stability *** facile modification strategy can improve the hydrothermal stability of UIO-66 significantly,which can expand its catalytic applications in aqueous systems.

关键词： metal−organic frameworks(MOFs) UIO-66 hydrolysis of cyclohexyl acetate hydrophobicity Brønsted acidity

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Bioinspired Closed-loop CPG-based Control of a Robotic Manta for Autonomous Swimming

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Journal of Bionic Engineering 2024年第1期21卷 177-191页

作者： Yiwei Hao Yonghui Cao Yingzhuo Cao Xiong Mo Qiaogao Huang Lei Gong Guang pan Yong Cao School of Marine Science and Technology Northwestern Polytechnical UniversityXi'an 710072China Unmanned Vehicle Innovation Center Ningbo Institute of NPUNingbo 315103China Key Laboratory of Unmanned Underwater Vehicle Technology of Ministry of Industry and Information Technology Xi'an 710072China

Fish in nature exhibit a variety of swimming modes such as forward swimming,backward swimming,turning,pitching,etc.,enabling them to swim in complex scenes such as coral *** is still difficult for a robotic fish to swim autonomously in a confined area as a real ***,we develop an untethered robotic manta as an experimental platform,which consists of two flexible pectoral fins and a tail fin,with three infrared sensors installed on the front,left,and right sides of the head to sense the surrounding *** generate multiple swimming modes of the robotic manta and online switching of different modes,we design a closed-loop Central Pattern Generator(CPG)controller based on distance information and use a combination of phase difference and amplitude of the CPG model to achieve stable and rapid adjustment of yaw *** verify the autonomous swimming ability of the robotic manta in complex scenes,we design an experimental scenario with a concave *** experimental results show that the robotic manta can achieve forward swimming,backward swimming,in situ turning within the concave obstacle,and finally exit from the area safely while relying on the perception of external obstacles,which can provide insight into the autonomous exploration of complex scenes by the biomimetic robotic ***,the swimming ability of the robotic manta is verified by field tests.

关键词： Biomimetic robotic manta Central Pattern Generator Closed-loop control Backward swimming

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Design and Verification of High Attenuation Vibration Isolation Damper in Remote Sensing Satellite Transport

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Journal of Harbin Institute of Technology(New Series) 2021年第6期28卷 63-71页

作者： Hao Fu Wei Zhang Junliang Liu Shangjie pan Beijing Institute of Spacecraft Environment Engineering Beijing 100094China Harbin Institute of Technology School of Mechatronics EngineeringHarbin 150001China

To solve the safe horizontal transportation by rail&road of remote sensing satellite problem in the process of unpredictable dynamic load,a high attenuation vibration isolation damper(hereinafter referred to as vibration isolation damper)was *** simulation analysis and transportation test using satellite structural model and engineering prototype,validity and reliability of the vibration isolation damper was verified,which can meet the requirements of vibration and shock from various transportation conditions.

关键词： satellite structural model high attenuation vibration isolation damper dynamic analysis

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Nitrogen-rich three-dimensional porous carbon mosaicked Na_(4)Ge_(9)O_(20)as anode material for high-performance lithium-ion batteries

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Rare Metals 2023年第2期42卷 438-448页

作者： Hao-Miao Zhang Jing Chen Rou Lu Cong-Ge Lu Shuang Zhou Zhi Chang An-Qiang pan School of Materials Science and Engineering Central South UniversityChangsha410083China School of Physics and Materials Nanchang UniversityNanchang330031China

Germanium-based material has attracted numerous attentions and been regarded as a promising anode material for lithium-ion batteries due to its high theoretical ***,drastic pulverization and rapid capacity fading caused by large volume variation during cycling limit its practical *** this work,three-dimensional N-doped carbon framework-wrapped Na_(4)Ge_(9)O_(20)nanoparticles(3D Na_(4)Ge_(9)O_(20)@N-C)have been synthesized via freeze-drying approach with NaCl as both template and sodium source for *** employment of NaCl has two special roles:on the one hand,the NaCl crystals act as template and facilitate the formation of 3D porous structure,while on the other hand,the NaCl crystals serving as sodium source and support the ion exchange between NaCl and GeO_(2)promote the formation of Na_(4)Ge_(9)O_(20).Benefiting from the unique method,the prepared 3D Na_(4)Ge_(9)O_(20)@N-C not only suppresses the volume change by using carbon as buffer layers but also demonstrates an improved electronic conductivity and a shortened ionic *** utilized as an anode material for LIBs,the 3D Na_(4)Ge_(9)O_(20)@N-C composites deliver high reversible capacity(896.2 mAh·g^(-1)at0.1 A·g^(-1)after 100 cycles),good cycling stability(520.8 mAh·g^(-1)at 2.0 A·g^(-1)after 400 cycles)and excellent rate performance(636.0 mAh·g^(-1)at 2.0 A·g^(-1)).This work provides a strategy to improve the electrochemical performance of germanium-based anode materials for lithium-ion batteries.

关键词： Germanium-based anode Na_(4)Ge_(9)O_(20) Ndoped carbon Porous nanostructure Lithium-ion batteries(LIBs)

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Complementary two-phase anode improving stability and conductivity for lithium storage performance

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Rare Metals 2023年第1期42卷 85-99页

作者： Xue-Fang Xie Guo-Zhao Fang Ying-Zhu Hu Xin-Xin Cao Ting Zhu An-Qiang pan School of Materials Science&Engineering Central South UniversityChangsha410083China

Metal chalcogenides with multiple lithium ions storage capability have received extensive attentions in recent years;however,their practical application is restricted by the structural instability and poor ***,a unique structure of N and S co-doped C/TiO_(2)nanofibers is reported to support SnS nanosheets for fast and ultra-stable lithium *** incorporation of TiO_(2)can notably suppress the excessive uncontrollable growth of SnS and improve the structural stability of the electrode *** effects of the ratios between Ti and Sn and the corresponding synthesis temperatures on the structure and electrochemical properties of the electrodes have been systematically *** interface charge transfer behavior of SnS and TiO_(2)composite heterostructure was clarified by density functional theory(DFT)*** electronic interaction SnS and TiO_(2)can effectively reduce the energy band gap and form a built-in electric field at the interface of the two *** is beneficial for the adsorption of lithium ion and consequently accelerate the reaction kinetics of the electrode *** the two phases are combined,the agglomeration of SnS is effectively suppressed,and the overall conductivity of the composite is greatly ***,the synergistic effect induced by SnS and TiO_(2)enables the good stability of the electrode in both lithium-ion half-cells and full *** work can provide new insights toward improving the performance of alloy-type anodes.

关键词： SnS TiO_(2) Structural stability Battery

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Migration of harmful elements in municipal sludge under hightemperature oxidation conditions

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Journal of Iron and Steel Research International 2023年第9期30卷 1701-1713页

作者： Xiao-dong Ping Hai-feng Wang Feng Wang Xin-yu Wan Zhi-wei An Jian-lei pan State Key Laboratory of Advanced Steel Processes and Products Central Iron and Steel Research Institute Co.Ltd.Beijing 100081China Department of Science and Technology Development China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China Production and Equipment Department Chengde Jianlong Special Steel Co.Ltd.Chengde 067200HebeiChina Technology Department Chengde Jianlong Special Steel Co.Ltd.Chengde 067200HebeiChina

Municipal sludge is produced in large amounts and is difficult to *** is the most direct and thorough treatment *** order to study the feasibility of sintering for municipal sludge treatment,the municipal sludge reforming process was studied under high-temperature oxidation *** results showed that the sludge reforming process could be divided into four stages:the precipitation and evaporation of adsorbed water,the precipitation and combustion of the volatile,the combustion of the residual volatile and solid carbon,and the decomposition of salts and the melting of *** increase in the heating rate resulted in more intense sludge combustion and improved the sludge reaction capacity and combustion *** burning at 1300℃,Si,Ca,Mg,Al,K,Na,and Cu formed new phases and entered the slag.75%of P remained in the slag.80%of the S formed SO_(2) and entered the flue *** formed gaseous chlorides like HCl upon combustion and entered the flue *** sintering is a feasible method for treating municipal sludge,care must be taken to limit the amount of P that ends up in the ore.

关键词： Municipal sludge Oxidizing atmosphere Mini-sintering Reforming process Element migration

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First-row transition metal compounds for aqueous metal ion batteries

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Journal of Energy Chemistry 2021年第12期30卷 195-216,I0004页

作者： Mengmeng Zhou Xinjun Huang Xiaomeng Tian Baohua Jia Hongge pan Wenping Sun Qin Zhao Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning University.Shenyang 110036LiaoningChina Centre for Translational Atomaterials Swinburne University of TechnologyHawthornVIC 3122Australia Institute of Science and Technology for New Energy Xi'an Technological UniversityXi'an 710021ShaanxiChina School of Materials Science and Engineering Stare Key Laboratory of Clean Energy UtilizationZhejiang University.Hangzhou 310027ZhejiangChina

In recent years,a series of aqueous metal ion batteries(AMIBs)has been developed to improve the safety and cost-efficiency of portable electronics and electric ***,the significant gaps in energy density,power density,and cycle stability of AMIBs directly hinder them from replacing the currently widely used non-aqueous metal ion batteries,which stems from the lack of reasonable configuration and performance optimization of electrode ***-row transition metal compounds(FRTMCs),with the advantages of optional voltage ranges(from low to high),adjustable crystal structures(layered and tunnel types with large spacing),and designable morphology(multi-dimensional nanostructures),are widely used to construct high-performance ***,no comprehensive review papers were generated to highlight their specific and significant roles in *** this review,we first summarize the superiority and characteristics of FRTMCs in ***,we put forward control strategies of FRTMCs from subsurface engineering to inner construction to promote capacitance control and diffusion control energy *** that,the electrochemical performance of the FRTMCs regulation strategies in AMIBs is ***,we present potential directions and challenges for further enhancements of FRTMCs in *** review aims to provide an in-depth understanding of regulation strategies for enhancing energy storage to build high-performance AMIBs that meet practical applications.

关键词： First-row transition metal Aqueous metal ion batteries Energy storage

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Using pipette tips to readily generate spheroids comprising single or multiple cell types

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第10期24卷 875-885页

作者： Rong pan Xiaoyan YANG Shiming WU Yuanyuan XIE Feng CHEN Ke NING Wei SUN Ling YU Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationInstitute for Clean Energy and Advanced MaterialsSchool of Materials and EnergySouthwest UniversityChongqing 400715China College of Chemistry and Chemical Engineering Hainan Normal UniversityHaikou 571158China

Three-dimensional(3D)cell culture methods have been validated that can replicate the tumor environment in vivo to a large extent,providing an effective tool for studying *** this study,we demonstrated the use of standard laboratory pipette tips as micro vessels for generating 3D cell *** microfabrication or wet-chemistry surface modifications were involved in the *** consisting of single or multiple cell types were generated within 24 h just by pipetting and incubating a cell suspension in pipette *** electron microscope and optical microscope proved that the cells grew together tightly,and suggested that while gravity force might have initiated the sedimentation of cells at the bottom of the tip,the active aggregation of cells to form tight cell-cell interactions drove the formation of *** common laboratory micropipettes and pipette tips,the rate of spheroid generation and the generation reproducibility was characterized from five boxes each with 80 *** ease of transferring reagents allowed modeling of the growth of microvascular endothelial cells in tumor ***,the pairing and fusion of tumor spheroids could be manipulated in the pipette tips,suggesting the potential for building and assembling heterogeneous micro-tumor tissues in vitro to mimic solid tumors in *** study demonstrated that spheroids can be readily and cost-effectively generated in standard biological laboratories in a timely manner using pipette tips.

关键词： Pipette tip 3D cell culture Tumor spheroids Co-culture In-situ observation

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In-situ construction of N-doped carbon nanosnakes encapsulated FeCoSe nanoparticles as efficient bifunctional electrocatalyst for overall water splitting

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Journal of Energy Chemistry 2022年第5期31卷 699-708页

作者： Yuan pan Minmin Wang Min Li Guangxun Sun Yinjuan Chen Yunqi Liu Wei Zhu Bin Wang State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580ShandongChina Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou UniversityChangzhou 213164JiangsuChina State Key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China School of Chemistry and Chemical Engineering Shaanxi Normal UniversityXi’an 710119ShaanxiChina

The development of bifunctional electrocatalysts with high activity and stability for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is crucial for efficient overall water splitting but still ***,we propose a facile and effective polymerization–pyrolysis–selenization(PPS)strategy for in-situ synthesis of N-doped carbon nanosnakes(NCNSs)encapsulated Fe-doped CoSe nanoparticles(NPs)derived from predesigned trimetallic Zn/Fe/Co polyphthalocyanine conjugated polymer *** from the synergistic effect between the regulation of Fe atoms and CoSe NPs as well as the confinement effect of in situ formed porous conductive carbon nanosnakes,the FeCoSe@NCNSs catalyst exhibited the excellent electrocatalytic activity for HER with small overpotentials(142 and 99 mV in 0.5 M H_(2)SO_(4) and 1 M KOH)and OER(320 mV in 1 M KOH)at the current density of 10 mA cm^(-2).Particularly,it also can be used as an efficient bifunctional electrocatalyst with a cell voltage of 1.66 V to achieve a current density of 10 mA cm^(-2) and superior stability for overall water *** functional theory study reveals that the doping of Fe atoms on Co Se enhanced the splitting and delocalization of metal-d orbitals close Fermi level,and modifies the distribution of Se-p orbitals close Fermi level,which improved the flexibility of electron donor-acceptor system and the hydrogen adsorption free energy change on metal-metal bridge sites in FeCoSe@***,beneficial from the accepting of Fe-Se bridge site,the overpotential of OER which following intramolecular oxygen coupling mechanism is also decreased,thus accelerating the electrocatalytic *** work presents a novel strategy to regulate the activity and stability of transition metal selenides and facilitating the rational design of bifunctional electrocatalysts for overall water splitting applications.

关键词： FeCoSe nanoparticles N-doped carbon nanosnakes Bifunctional electrocatalyst Synergistic effect Water splitting

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Prediction of Deformation-Induced γ→α Transformation of 16MnNb Steel

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Journal of Iron and Steel Research International 2003年第4期10卷 59-62页

作者： YUN Bing pan Hao YANG Cai-fu SHEN Jun-chang SU Hang Central Iron and Steel Research Institute

Based on the nucleation and growth theory together with the influence of deformation on driving force and nucleation site,a numerical model was developed for predicting deformation-induced transformation(DIT).The numerical results of DIT of 16 MnNb steel was presented and compared with the experimental *** calculated results are in agood agreement with the experimental ones,and the best calculated result is obtained when the constantα=0.25 for steel 16 MnNb.

关键词： 16MnNb steel phase transformation computer simulation microstructure deformation

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