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A review.on current development of thermophotovoltaic technology.in heat recovery

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International Journal of Extreme Manufacturing 2024年第2期6卷 297-323页

作者： Shuni Chen y.nming guo Qinghui Pan y.ng Shuai Ministry.of Industry.and Information Technology.Key.Laboratory.of Aerospace Thermophy.ics School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

The burning of fossil fuels in industry.results in significant carbon emissions,and the heat generated is often not fully.*** high-temperature industries,thermophotovoltaics(TPVs)is an effective method for w.ste heat *** review.covers tw. aspects of high-efficiency.TPV sy.tems and industrial w.ste heat *** the sy.tem level,representative results of TPV complete the sy.tems,w.ile selective emitters and photovoltaic cells in the last decade are *** key.points of components to improve the energy.conversion efficiency.are further analy.ed,and the related micro/nano-fabrication methods are *** the application level,the feasibility.of TPV applications in high-temperature industries is show. from the w.rld w.ste heat utilization *** potential of TPV in w.ste heat recovery.and carbon neutrality.is illustrated w.th the steel industry.as an example.

关键词： thermophotovoltaic w.ste heat recovery micro/nano-fabrication carbon neutrality

Plasma-exfoliated g-C_(3)N_(4) w.th oxy.en doping: tailoring photocataly.ic properties

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 27-39页

作者： y.xin Li Junxin guo Rui Han Zhao w.ng National Engineering Research Centre of Industry.Cry.tallization Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Heteroatom doping and defect engineering have been proposed as effective w.y. to modulate the energy.band structure and improve the photocataly.ic activity.of g-C_(3)N_(4). In this w.rk, ultrathin defective g-C_(3)N_(4) w.s successfully.prepared using cold plasma. Plasma exfoliation reduces the thickness of g-C_(3)N_(4) from 10 nm to 3 nm, w.ile simultaneously.introducing a large number of nitrogen defects and oxy.en atoms into g-C_(3)N_(4). The amount of doped O w.s regulated by.vary.ng the time and pow.r of the plasma treatment. Due to N vacancies, O atoms formed strong bonds w.th C atoms, resulting in O doping in g-C_(3)N_(4). The mechanism of plasma treatment involves oxy.en etching and gas expansion. Photocataly.ic experiments demonstrated that appropriate amount of O doping improved the photocataly.ic degradation of rhodamine B compared w.th pure g-C_(3)N_(4). The introduction of O optimized the energy.band structure and photoelectric properties of g-C_(3)N_(4). Active species trapping experiments revealed ·O_(2)^(–) as the main active species during the degradation.

关键词： graphitic carbon nitride cold plasma oxy.en doping nitrogen defect visible-light photocataly.is

The nitrogen transformation behavior based on the py.oly.is products of w.eat straw

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Chinese Journal of Chemical Engineering 2024年第7期71卷 58-65页

作者： Shun guo y.nfei Li Shengw.i Tang Tao Zhang School of Chemical Engineering Sichuan UniversityChengdu 610065China

In order to provide basic design parameters for the industrial py.oly.is process,the transformation behavior of nitrogen w.s investigated using w.eat straw.as raw.*** distributions of nitrogen in py.oly.is char,oil,and gas w.re obtained and the nitrogenous components in the products w.re analy.ed sy.tematically.by.X-ray.photoelectron spectroscopy.XPS),py.oly.is-gas chromatography.mass spectrometry.Py.GC/MS)and thermogravimetric-Fourier transform infrared spectrometry.TG-FTIR).The nitrogen distribution ranges of the py.oly.is char,oil,and gas w.re 37.34%–54.82%,32.87%–40.94%and 10.20%–28.83%,*** nitrogen w.s retained in char at low.r py.oly.is temperature and the nitrogen distribution of oil w.s from rise to decline w.th increasing *** most abundant N-containing compounds in three-phase products w.re py.role-N,amines,and HCN,*** addition,the transformation mechanism of nitrogen from w.eat straw.to py.oly.is products w.s concluded.

关键词： Py.oly.is Nitrogen transformation w.eat straw Py.GC/MS TG-FTIR

Coupled funnel control for supersonic tailless aerial vehicle on penetrating counter air

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Chinese Journal of Aeronautics 2024年第7期37卷 458-481页

作者： y.ngy.ng w.NG Peng ZHANG Jilian guo Jianbo HU Equipment Management and Unmanned Aerial Vehicle Engineering School Air Force Engineering UniversityXi’an 710051China Aviation Engineering School Air Force Engineering UniversityXi’an 710038China

Supersonic Tailless Aerial Vehicles(STAVs)w.ll become an essential force in Penetrating Counter Air(PCA),but STAVs do not have the traditional horizontal and vertical tails,making pitch and y.w.control *** attack angle and the sideslip angle need to be limited to ensure that the engine inlet and the aerody.amic rudder at the rear of the vehicle can w.rk properly.w.ich is the so-called security.*** addition,the tracking error of the aerody.amic angle needs to be limited to achieve effective attitude control or high-accuracy.tracking of trajectories,w.ich is the so-called performance *** this end,an attitude control method that meets the needs of PCA has been devised,based on constraint definition,coupled constraints handling,and control law.***,mathematical descriptions of the security.constraints,performance constraints,and control constraints are ***,tw. treatment methods,coupled command filter and coupled funnel control are proposed for the aerody.amic angle coupled constraint ***,based on Nonlinear Dy.amic Inverse(NDI)design,the coupled funnel controller is designed and validated by.simulation for tw. ty.ical mission scenarios,high-altitude penetration and low.altitude surprise *** proposed control method not only.satisfies the security.and performance constraints of STAV attitude control but also is highly.robust.

关键词： Supersonic tailless aircraft Penetrating counter air Funnel control Attitude control Control allocation

Evolution of copper species during heat treatment and its effect on CO oxidation reaction on CuCeZrO_(y. cataly.t sy.thesized by.a facile solvent-free route

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Journal of Rare Earths 2024年第4期42卷 660-667页

作者： Guangy.ng Fu Dongsen Mao Jun y. Qiangsheng guo School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai21418 China The ZeoMat Group Qingdao Institute of Bioenergy and Bioprocess TechnologyCASQingdao26611China

Several ternary.oxides CuCeZrO_(y.(CCZ)w.re sy.thesized by.a facile grinding method follow.d by.calcination at high temperatures,and used as cataly.ts for CO oxidation at low.*** influences of calcination temperature(400-600℃)on the phy.icochemical properties of the assy.thesized ternary.oxides w.re investigated by.thermogravimetric analy.is/differential scanning calorimetry.TGA/DSC),X-ray.diffraction(XRD),transmission electron microscopy.TEM),Raman,inductively.coupled plasma-optical emission spectrometry.ICP-OES),N_(2) adsorption,H_(2)-temperature programmed reduction(H_(2)-TPR),and X-ray.photoelectron spectroscopy.XPS)*** results show.that the increase in calcination temperature from 400 to 500℃is conducive to the high dispersion of CuOx on cataly.t surface and the incorporation of Cu species into the support to form the Cu-Ce-Zr-O solid *** raising of calcination temperature from 500 to 600℃,how.ver,leads to the segregation of Cu species from the solid solution to aggregate on support surface and grow.h of highly.dispersed CuOx *** highest cataly.ic activity.is acquired over the CCZ calcined at 500℃,w.ich can be ascribed to the largest contents of Cu+species and oxy.en vacancies ow.ng to the formation of the maximum amount of Cu-Ce-Zr-O solid solution.

关键词： CuCeZrO_(y.cataly.t co oxidation Calcination temperature Grinding method Oxalate precursor Rare earths

A Fractional-Order Ultra-Local Model-Based Adaptive Neural Netw.rk Sliding Mode Control of n-DOF Upper-Limb Exoskeleton w.th Input Deadzone

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 760-781页

作者： Dingxin He HaoPing w.ng y.ng Tian y.da guo the School of Automation Nanjing University of Science and TechnologyNanjing 210094China IEEE Norinco Group Institute of Navigation and Control Technology Beijing 100089China

This paper proposes an adaptive neural netw.rk sliding mode control based on fractional-order ultra-local model for n-DOF upper-limb exoskeleton in presence of uncertainties,external disturbances and input *** the model complexity.and input deadzone,a fractional-order ultra-local model is proposed to formulate the original dy.amic sy.tem for simple controller ***,the control gain of ultra-local model is considered as a *** fractional-order sliding mode technique is designed to stabilize the closed-loop sy.tem,w.ile fractional-order time-delay.estimation is combined w.th neural netw.rk to estimate the lumped ***,a fractional-order ultra-local model-based neural netw.rk sliding mode controller(FO-NNSMC) is ***,to avoid disadvantageous effect of improper gain selection on the control performance,the control gain of ultra-local model is considered as an unknow. ***,the Nussbaum technique is introduced into the FO-NNSMC to deal w.th the stability.problem w.th unknow. ***,a fractional-order ultra-local model-based adaptive neural netw.rk sliding mode controller(FO-ANNSMC) is ***,the stability.analy.is of the closed-loop sy.tem w.th the proposed method is presented by.using the Ly.punov ***,w.th the co-simulations on virtual prototy.e of 7-DOF iReHave upper-limb exoskeleton and experiments on 2-DOF upper-limb exoskeleton,the obtained compared results illustrate the effectiveness and superiority.of the proposed method.

关键词： Adaptive control input deadzone model-free control n-DOF upper-limb exoskeleton neural netw.rk

Enhanced corrosion resistance of epoxy.resin coating via addition of CeO_(2) and benzotriazole

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Chinese Journal of Chemical Engineering 2024年第3期67卷 89-96页

作者： Xu Han Ruijie guo Baolong Niu Hong y.n College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Key.Laboratory.of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

The use of fillers to enhance the corrosion protection of epoxy.resins has been w.dely.*** this w.rk,cerium dioxide(CeO_(2))and benzotriazole(BTA)w.re introduced into an epoxy.resin to enhance the corrosion resistance of Q235 carbon *** electron microscopy.results indicated that the CeO_(2) grains w.re rod-like and ellipsoidal in shape,and the distribution pattern of BTA w.s analy.ed by.energy.dispersive *** dy.amic potential polarization curve proved the excellent corrosion resistance of the composite epoxy.resin w.th CeO_(2) and BTA co-addition,and electrochemical impedance spectroscopy.test analy.is indicated the significantly.enhanced long-term corrosion protection performance of the composite *** the optimal protective performance w.s provided by.the coating containing 0.3%(mass)CeO_(2) and 20%(mass)BTA,w.ich w.s attributed to the barrier performance of CeO_(2) particles and the chemical barrier effect of *** formation of corrosion products w.s analy.ed using X-ray.*** addition,the corrosion resistance mechanism of the coating w.s also discussed in detail.

关键词： Benzotriazole Cerium dioxide Corrosion resistance Carbon steel Epoxy.resin coating Preparation

An effective strategy.of constructing multi-metallic oxides of ZnO/ CoNiO_(2)/CoO/C microflow.rs for improved supercapacitive performance

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Chinese Journal of Chemical Engineering 2024年第3期67卷 1-8页

作者： w.i guo y.n Zhang Xiaxin Lei Shuang w.ng College of Phy.ics Taiyuan University of TechnologyJinzhong 030600China College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Shanxi Key.Laboratory.of Gas Energy.Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

In this w.rk,a new.ZnO/CoNiO_(2)/CoO/C metal oxides composite is prepared by.cost-effective hy.rothermal method coupled w.th annealing process under N_(2) ***,the oxidation-defect annealing environment is conducive to both morphology.and component of the composite,w.ich flow.r-like ZnO/CoNiO_(2)/CoO/C is *** from good chemical stability.of ZnO,high energy.capacity.of CoNiO_(2) and CoO and good conductivity.of C,the as-prepared sample show. promising electrochemical behavior,including the specific capacity.of 1435 C·g^(-1) at 1 A·g^(-1),capacity.retention of 87.3%at 20 A·g^(-1),and cy.ling stability.of 90.5%for 3000 cy.les at 5 A·g^(-1),***,the prepared ZnO/CoNiO_(2)/CoO/C/NF//AC aqueous hy.rid supercapacitors device delivers the best specific energy.of 55.9 w.h·kg^(-1) at 850 w.kg^(-1).The results reflect that the as-prepared ZnO/CoNiO_(2)/CoO/C microflow.rs are considered as high performance electrode materials for supercapacitor,and the strategy.mentioned in this paper is benefit to prepare mixed metal oxides composite for energy.conversion and storage.

关键词： Composites Electrochemistry Hy.rothermal Transition metal oxides Structural control Supercapacitors

Hierarchical Spinning of Janus Textiles w.th Anisotropic w.ttability.for w.und Healing

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Research 2024年第1期2023卷 97-105页

作者： Han Zhang Lingy. Sun Jiahui guo y.anjin Zhao Department of Rheumatology.and Immunology Nanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjingJiangsu 210096China Oujiang Laboratory.Zhejiang Lab for Regenerative Medicine Vision and Brain Health)Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhouZhejiang 325001China

w.und healing and tissue repair are recognized as basic human health problems *** to accelerate the reparative process are focused on developing functional w.und ***,w. present novel Janus textiles w.th anisotropic w.ttability.from hierarchical microfluidic spinning for w.und *** hy.rophilic hy.rogel microfibers from microfluidics are w.ven into textiles for freeze-dry.ng treatment,follow.d by.the deposition of electrostatic spinning nanofibers composed of hy.rophobic poly.actic acid(PLA)and silver *** electrospun nanofiber lay.r can be w.ll coupled w.th the hy.rogel microfiber lay.r to generate Janus textiles w.th anisotropic w.ttability.due to the roughness of the hy.rogel textile surface and the incomplete evaporation of PLA solution w.en reaching the *** w.und treatment w.th the hy.rophobic PLA side contacting the w.und surface,the w.und exudate can be pumped from the hy.rophobic to the hy.rophilic side based on the w.ttability.differential derived drainage *** this process,the hy.rophobic side of the Janus textile can prevent excess fluid from infiltrating the w.und again,preventing excessive moisture and preserving the breathability.of the *** addition,the silver nanoparticles contained in the hy.rophobic nanofibers could impart the textiles w.th good antibacterial effect,w.ich further promote the w.und healing *** features indicate that the described Janus fiber textile has great application potential in the field of w.und treatment.

关键词： silver spinning healing