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Enhancing capacitive deionization performance and cyclic stability of nitrogen-doped activated carbon by the electro-oxidation of anode materials

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Chinese Journal of Chemical Engineering 2024年第5期69卷 23-33页

作者： Xiaona Liu Baohua Zhao Yanyun Hu Luyue Huang Jingxiang Ma Shuqiao Xu Zhonglin Xia Xiaoying Ma Shuangchen Ma School of Environmental Science and Engineering North China Electric Power UniversityBaoding 071003China huadian zhengzhou machinery design and research institute co. LtdZhengzhou 450002China huadian Inner Mongolia Energy co. Ltd.Baotou Power Generation BranchBaotou 014013China

Electrode materials with high desalination capacity and long-term cyclic stability are the focus of capacitive deionization(CDI) co.munity. Understanding the causes of performance decay in traditional carbons is crucial to design a high-performance material. Based on this, here, nitrogen-doped activated carbon(NAC) was prepared by pyrolyzing the blend of activated carbon powder(ACP) and melamine for the positive electrode of asymmetric CDI. By co.paring the indicators changes such as co.ductivity, salt adsorption capacity, pH, and charge efficiency of the symmetrical ACP-ACP device to the asymmetric ACP-NAC device under different CDI cycles, as well as the changes of the electrochemical properties of anode and cathode materials after long-term operation, the reasons for the decline of the stability of the CDI performance were revealed. It was found that the carboxyl functional groups generated by the electro-oxidation of anode carbon materials make the anode zero-charge potential(E_(pzc)) shift positively,which results in the uneven distribution of potential windows of CDI units and affects the adsorption capacity. Furthermore, by understanding the electron density on C atoms surrounding the N atoms, we attribute the increased cyclic stability to the enhanced negativity of the charge of carbon atoms adjacent to quaternary-N and pyridinic-oxide-N.

关键词： Anodic oxidation Capacitive deionization Cyclic stability N-doping

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Performance Analysis of an Efficient Integration System of co.l-Fired Power Plant,Solar Thermal Energy and co.(2)Capture

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Journal of Thermal Science 2024年第4期33卷 1509-1522页

作者： WANG Yuhao WANG Ruilin LIU Lanhua XING Chenjian GUO Yafei YANG Qingshan YING Jiaheng SUN Jian LI Wenjia LIU Yuanyuan ZHAO Chuanwen School of Energy and Mechanical Engineering Nanjing Normal UniversityNanjing210023China China huadian Group co.LTD.Shanghai Branch Shanghai200120China Key Laboratory of Efficient Utilization of Low and Medium Grade Energy(Tianjin University) Ministry of Education of ChinaTianjin300350China huadian zhengzhou Mechanical design institute co.pany Limited Zhengzhou450046China

co.l-fired power plant is a major co.tributor to greenhouse gas *** post-co.bustion capture is a promising method for co.(2)emission reduction but the high thermal demand is *** address this issue,solar thermal energy and co.(2)capture are jointly integrated into the co.l-fired power plant in this *** solar thermal energy is employed to meet the heat requirement of the co.(2)capture process,thereby avoiding the electricity loss caused by self-driven co.(2)***,the heat released from the carbonation reaction of MgO adsorbent is integrated into the steam Rankine *** partially substituting the extracted steam for feedwater heating,the electricity output of the power plant is further *** to the results from the developed model,the system co.ld achieve a co.(2)capture rate of 86.5%and an electricity output enhancement of 9.8%co.pared to the reference system,which co.sists of a self-driven co.(2)capture co.l-fired power plant and PV generation *** operational strategy is also optimized and the amount of co.(2)emission reduction on a typical day is increased by 11.06%.This work shows a way to co.bine fossil fuels and renewable energy for low carbon emissions and efficient power generation.

关键词： co.(2)capture parabolic trough co.lector solar aided co.l-fired electricity generation

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Effect of Zirco. Addition on Properties of co.undum Porous Materials

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China's Refractories 2024年第1期33卷 7-13页

作者： CHEN Haonan LIU Xin ZHANG Shiming LI Ying WANG Di JIA Quanli Henan Key Laboratory of High Temperature Functional Ceramics School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450052China Henan Building Materials research and design institute co. Ltd.Zhengzhou 450002China

This paper aims to improve the co.rosion resistance of dispersive purging *** fused co.undum particles and fine powder,α-Al_(2)O_(3) micropowder,Cr_(2)O_(3) micropowder,Guangxi clay and zirco. powder were used as the main raw *** mass ratio of white fused co.undum particles and fine powder was fixed at 85:15,and 0,1%,2%,or 3%(by mass)of zirco. fine powder was added to replace the same amount of white fused co.undum fine *** co.undum porous material was prepared by the particle stacking pore-forming method at 1650℃for 3 *** effect of the zirco. addition on the properties and microstructure of porous materials was *** results show that:after adding zirco.,the permeability of the porous material increases,the co.d and hot strengths increase obviously,and the expansion rate after firing *** the addition of zirco. is 2%,the co.prehensive performance of the specimen is optimal with the smallest linear change rate and the highest permeability.

关键词： porous materials zirco. fines purging plug permeability

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Unveiling the surface-interface properties of perovskite crystals and pivotal regulation strategies

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Nano research 2024年第5期17卷 3950-3981页

作者： Qin Li Ziyu Wang Junjie Ma Mengqi Han Peng Gao Meng Cai Yiqiang Zhang Yanlin Song Shou Peng Henan institute of Advanced Technology College of ChemistryZhengzhou UniversityZhengzhou 450001China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of Sciences(ICCAS)Beijing 100190China China National Building Material Group co. Ltd.Beijing 100036China State Key Laboratory of Advanced Technology for Float Glass Beijing 100036China

Metal-halide perovskite solar cells have garnered significant research attention in the last decade due to their exceptional photovoltaic performance and potential for *** achieving remarkable power co.version efficiency of up to 26.1%,a substantial discrepancy persists when co.pared to the theoretical Shockley-Queisser(SQ)*** of the most serious challenges facing perovskite solar cells is the energy loss incurred during photovoltaic co.version,which affects the SQ limits and stability of the *** significant than the energy loss occurring in the bulk phase of the perovskite is the energy loss occurring at the ***,we provide a systematic overview of the physical and chemical properties of the ***,we delve into the underlying mechanism causing the energy deficit and structural degradation at the surface-interface,aiming to enhance the understanding of carrier transport processes and structural chemical ***,we systematically summarized the primary modulating pathways,including surface reco.struction,dimensional co.struction,and electric-field ***,we propose directions for future research to advance the efficiency of perovskite solar cells towards the radiative limit and their widespread co.mercial application.

关键词： perovskite solar cells surface-interface treatment defect modification dimensional design energy regulation heterojunction and homojunction

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Characteristics and Trends of Urban Waterfront Human Settlements Based on CiteSpace

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Journal of World Architecture 2024年第2期8卷 146-153页

作者： Binbin Zhang Jinghao Li Ying Ma Nanwei Wu Information Engineering University Zhengzhou 450001China Beijing University of Civil Engineering and Architecture Beijing 100044China China Architecture design and research institute co. Ltd.Beijing 100045China

Urban waterfront human settlements have gradually beco.e a hot topic for research in recent *** CiteSpace,597 publications from 2017 to 2023 that were retrieved from the Web of Science were analyzed and sorted out,and the following characteristics were found:(1)The research hotspots transitioned from thermal co.fort evaluation to the functional mechanism of water bodies,and then to the impact on the environment and residents’behavior.(2)The integration of disciplines has promoted the diversification of perspectives on urban waterfront human settlements,and the co.tent has beco.e more co.centrated in interdisciplinary *** on co.responding technology and methods of urban waterfront human settlement has improved,and so has the extensiveness of the experiments.(3)The research on urban waterfront human settlement from the perspective of eco.ogy has been *** research focuses more on the harmonious co.xistence of eco.ogical and cultural values and human beings.

关键词： Urban waterfront living environment Bibliometric analysis Urban thermal environment Eco.ogical civilization co.struction Online publication:May 20,2024

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Structure-regulated fluorine-co.taining additives to improve the performance of perovskite solar cells

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Nano research 2024年第7期17卷 6080-6086页

作者： Peiya Chen Xiaoman Bi Hao Yan Yingjie Zhao Yihao Liu Zhuo Huang Qian Xiao Yongpeng Yang Shasha Zhang Yiqiang Zhang Yanlin Song Henan institute of Advanced Technology College of ChemistrySchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(ICCAS)Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyNational Laboratory for Molecular Sciences(BNLMS)Beijing 100190China

Perovskite solar cells(PSCs)have seen remarkable progress in recent years,largely attributed to various additives that enhance both efficiency and *** these,fluorine-co.taining additives have garnered significant interest because of their unique hydrophobic properties,effective defect passivation,and regulation capability on the crystallization ***,a targeted structural approach to design such additives is necessary to further enhance the performance of ***,fluoroalkyl ethylene with different fluoroalkyl chain lengths(CH_(2)CH(CF_(2))nCF_(3),n=3,5,and 7)as liquid additives is used to investigate influences of fluoroalkyl chain lengths on crystallization regulation and defect *** findings indicate that optimizing the quantity of F groups plays a crucial role in regulating the electron cloud distribution within the additive *** optimization fosters strong hydrogen bonds and co.rdination effects with FA+and unco.rdinated Pb^(2+),ultimately enhancing crystal quality and device ***,1H,1H,2H-perfluoro-1-hexene(PF_(3))with the optimal number of F presents the most effective modulation effect.A PSC utilizing PF_(3)achieves an efficiency of 24.05%,and exhibits exceptional stability against humidity and thermal *** work sheds light on the importance of tailored structure designs in additives for achieving high-performance PSCs.

关键词： perovskite solar cells fluorine number additive structure crystallization regulation defect passivation

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Regulating microstructure and co.position by carbonizing in-situ grown metal-organic frameworks on co.ton fabrics for boosting electromagnetic wave absorption

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Nano research 2024年第8期17卷 7290-7300页

作者： Jie Jin Hongsen Long Hu Liu Yan Guo Tiantian Bai Ben Bin Xu Mohammed A.Amin Hua Qiu Mohamed H.Helal Chuntai Liu Changyu Shen Zeinhom M.El-Bahy Zhanhu Guo State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410000China School of Electronic Engineering North China University of Water Resources and Electric PowerZhengzhou 450046China co.plex co.ditions of High-end Tire Technology Innovation Center Shuguang Rubber Industry Research&Design Institute Co.LtdGuilin 541004China Integrated co.posites Lab Department of Mechanical and Civil EngineeringNorthumbria UniversityNewcastle Upon TyneNE18STUK Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Chemistry Faculty of Arts and ScienceNorthern Border UniversityRafha 73213Saudi Arabia Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt

High-temperature carbonized metal-organic frameworks(MOFs)derivatives have demonstrated their superiority for promising electromagnetic wave(EMW)absorbers,but they still suffer from limited EMW absorption capacity and narrow *** the advantage of microstructure and chemical co.position regulation for the design of EMW absorber,hierarchical heterostructured MoS_(2)/co._(2)-co.(3)O_(4)@cabonized co.ton fabric(CF)(MCC@CCF)is prepared by growing ZIF-67 MOFs onto CF surface,chemical etching,and *** from the dual loss mechanism of magnetic-dielectric multico.ponent carbonized MOFs,chemical etching and carbonization process can effectively introduce abundant micro-gap structure that can result in better impedance matching and stronger absorption capacity via internal reflection,doped heteroatoms(Mo,N,S)to supply additional dipolar polarization loss,and numerous heterointerfaces among MoS_(2),co._(2),co.(3)O_(4),and CCF that produce promoted co.duction loss and interfacial polarization ***,a minimal reflection loss of−52.87 dB and a broadest effective absorption bandwidth of 6.88 GHz were achieved via tunning the sample thickness and filler loading,showing excellent EMW absorption *** research is of great value for guiding the research on MOFs derivatives based EMW absorbing materials.

关键词： metal-organic frameworks hierarchical structure chemical etching sulfurization electromagnetic wave absorption

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High-entropy rare earth stannate ceramics:Acid co.rosion resistant radiative co.ling materials with high atmospheric transparency window emissivity and high near-infrared solar reflectivity

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Journal of Advanced Ceramics 2024年第5期13卷 630-640页

作者： Tao Chen Yanyan He Yanyu Pan Kaixian Wang Minzhong Huang Liyan Xue Yazhu Li Fan Yang Yanchun Zhou Heng Chen Fujian institute of research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002China co.lege of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350117China Xiamen institute of Rare Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China Key Laboratory of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341000China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

In response to the development of the co.cepts of“carbon neutrality”and“carbon peak”,it is critical to developing materials with high near-infrared(NIR)solar reflectivity and high emissivity in the atmospheric transparency window(ATW;8–13μm)to advance zero energy co.sumption radiative co.ling *** regulate emission and reflection properties,a series of high-entropy rare earth stannate ceramics(HE-RE_(2)Sn_(2)O_(7):(Y_(0.2)La_(0.2)Nd_(0.2)Eu_(0.2)Gd_(0.2))_(2)Sn_(2)O_(7),(Y_(0.2)La_(0.2)Sm_(0.2)Eu_(0.2)Lu_(0.2))_(2)Sn_(2)O_(7),and(Y_(0.2)La_(0.2)Gd_(0.2)Yb_(0.2)Lu_(0.2))_(2)Sn_(2)O_(7))with severe lattice distortion were prepared using a solid phase reaction followed by a pressureless sintering method for the first *** distortion is acco.plished by introducing rare earth elements with different cation radii and *** as-synthesized HE-RE_(2)Sn_(2)O_(7)ceramics possess high ATW emissivity(91.38%–95.41%),high NIR solar reflectivity(92.74%–97.62%),low thermal co.ductivity(1.080–1.619 W·m^(−1)·K^(−1)),and excellent chemical *** the one hand,the lattice distortion intensifies the asymmetry of the structural unit to cause a notable alteration in the electric dipole moment,ultimately enlarging the ATW *** the other hand,by selecting difficult excitation elements,HE-RE_(2)Sn_(2)O_(7),which has a wide band gap(Eg),exhibits high NIR solar ***,the multi-co.ponent design can effectively enhance radiative co.ling ability of HE-RE_(2)Sn_(2)O_(7)and provide a novel strategy for developing radiative co.ling materials.

关键词： radiative co.ling materials high-entropy ceramics(HECs) rare earth stannate(RE_(2)Sn_(2)O_(7)) high atmospheric transparency window emissivity high near-infrared(NIR)solar reflectivity

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co.struction and Application of a Regional Kilometer-Scale Carbon Source and Sink Assimilation Inversion System(CCMVS-R)

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Engineering 2024年第2期33卷 263-275页

作者： Lifeng Guo Xiaoye Zhang Junting Zhong Deying Wang Changhong Miao Licheng Zhao Zijiang Zhou Jie Liao Bo Hu Lingyun Zhu Yan Chen Monitoring and Assessment Center for GHGs and Carbon Neutrality&Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological SciencesBeijing 100081China Laboratory of Climate Change Mitigation and Carbon Neutrality Henan UniversityZhengzhou 450001China National Meteorological Information Center Beijing 100081China Shanxi Meteorological Administration Taiyuan 030002China Shanxi Provincial institute of Meteorological Sciences Taiyuan 030002China Jiangsu Provincial Climate Center Nanjing 210000China

co.(2)is one of the most important greenhouse gases(GHGs)in the earth’s *** the industrial era,anthropogenic activities have emitted excessive quantities of GHGs into the atmosphere,resulting in climate warming since the 1950s and leading to an increased frequency of extreme weather and climate *** 2020,China co.mitted to striving for carbon neutrality by *** co.mitment and China’s co.sequent actions will result in significant changes in global and regional anthropogenic carbon emissions and therefore require timely,co.prehensive,and objective monitoring and verification support(MVS)*** MVS approach relies on the top-down assimilation and inversion of atmospheric co.(2)co.centrations,as reco.mended by the Intergovernmental Panel on Climate Change(IPCC)Inventory Guidelines in ***,the regional high-resolution assimilation and inversion method is still in its initial stage of ***,we have co.structed an inverse system for carbon sources and sinks at the kilometer level by co.pling proper orthogonal deco.position(POD)with four-dimensional variational(4DVar)data assimilation based on the weather research and forecasting-greenhouse gas(WRF-GHG)*** China Carbon Monito ring and Verification Support at the Regional level(CCMVS-R)system can co.tinuously assimilate information on atmospheric co.(2)and other related information and realize the inversion of regional and local anthropogenic carbon emissions and natural terrestrial eco.ystem carbon *** co.(2)data were co.lected from six ground-based monito ring sites in Shanxi Province,China to verify the inversion effect of regio nal anthropogenic carbon emissions by setting ideal and real experiments using a two-layer nesting method(at 27 and 9 km).The uncertainty of the simulated atmospheric co.(2)decreased significantly,with a root-mean-square error of co.(2)co.centration values between the ideal value and the simulated after assimilation was close to

关键词： CCMVS-R Regional carbon assimilation system Anthropogenic carbon emissions co.(2) POD 4DVar

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Experimental Investigation on Fracture Performance of Short Basalt Fiber Bundle Reinforced co.crete

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Structural Durability & Health Monitoring 2022年第4期16卷 291-305页

作者： Jinggan Shao Jiao Ma Renlong Liu Ye Liu Pu Zhang Yi Tang Yunjun Huang School of Water co.servancy and Civil Engineering Zhengzhou UniversityZhengzhou450001China Henan Traffic Engineering Technology co. Ltd.Zhengzhou450015China Key Laboratory of Deep Underground Science and Engineering(Ministry of Education) College of Architecture and EnvironmentSichuan UniversityChengdu610065China Henan Provincial co.munications Planning&design institute co. Ltd.Zhengzhou450015China

In this paper,a notched three-point bending test is used to study the fracture performance of the short basalt fiber bundle reinforced co.crete(SBFBRC).To co.pare and analyze the enhancement effect of different diameters and different co.tent of basalt fiber bundles on the fracture performance of co.crete,some groups are set up,and the P-CMOD curves of each group of specimens are measured,and the fracture toughness and fracture energy of each co.trol group are *** fracture toughness and fracture energy are two important fracture performance parameters to study the effect and law of the new basalt fiber bundles on the fracture performance of *** research results show that the diameter and co.tent of the new basalt fiber bundles have a certain effect on the fracture performance of *** the increase of the co.tent of basalt fiber bundles,the peak load,crack initiation toughness,instability toughness and fracture energy of SBFBRC are greatly improved co.pared with the benchmark *** the fiber bundle diameter is 0.2 mm,the peak load increases by 69.5%co.pared with the reference *** instability toughness reaches its maximum value at 0.2 mm diameter,which is 59.7%higher than the benchmark.

关键词： Basalt fiber bundle fracture toughness fracture energy fiber co.crete

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