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Layered double hydroxides:Scale production and application in soil remediation as super-stable mineralizer

Chinese Journal of chemical engineering 2022年第1期35卷 42-48页

作者： Fangqi Mao Peipei Hao Yuquan Zhu Xianggui Kong Xue Duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

Soil contamination by heavy metals has presented severe risks to human health through food *** one of the most promising remediation technologies,in-situ immobilization strategy has been widely adopted in ***,considering the large quantities of contaminated soil,it is still a huge challenge to design low-cost amendments with strong and long-term immobilization *** double hydroxides(LDHs)have drawn tremendous attention in fundamental research and practical application because of their unique ***,owing to its super-stable mineralization effect to heavy metal ions,LDHs have exhibited great potential in the field of soil *** this work,we mainly focused on the scale production strategy of LDHs with low-cost,and its application in soil ***,several key challenges in using LDHs as amendments for immobilization of heavy metal ions are *** hope that this mini-review could shed light on the sustainable development of LDHs as amendment for heavy metals in future research directions.

关键词： Heavy metals Pollution Remediation Layered double hydroxides Scale-up Super-stable mineralization effect

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Challenges and opportunities in 2D materials for high-performance aqueous ammonium ion batteries

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National Science Review 2025年第2期12卷 348-365页

作者： Jie Xu Tao Liu Xusheng Dong Xiaoyi Dong Wanhai Zhou Xiaojie Li Dongliang Chao Zhen Zhou Ruizheng Zhao EngineeringResearch Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou University Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials State Key Laboratory of Molecular Engineering of Polymers and School of Chemistry and Materials Fudan University State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University

Aqueous ammonium ion batteries（AAIBs） have attracted considerable attention due to their high safety and rapid diffusion kinetics. Unlike spherical metal ions, NH4+forms hydrogen bonds with host materials,leading to a unique storage mechanism. A variety of electrode materials have been proposed for AAIBs, but their performance often falls short in terms of future energy storage needs. Hence, there is a critical need to design and develop advanced electrode materials for AAIBs. 2D materials, with their tunable interlayer spacing, remarkable interfacial chemistry and abundant surface functional groups, are an ideal choice for electrode materials for NH4+storage. This review highlights the latest research on 2D electrode materials for AAIBs, providing insights into their working principles, NH4+storage mechanisms and control strategies for designing high-performance AAIBs. Furthermore, a summary and future perspectives on 2D electrode materials in the development of AAIBs are provided, aiming to promote the advancement of high-performance AAIBs.

关键词： aqueous ammonium ion batteries non-metallic charge carriers 2D electrode materials storage mechanisms control strategies

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Electrically Driven Crosslinked Liquid Crystal Polymers

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Chinese Journal of Chemistry 2023年第21期41卷 2925-2938页

作者： Meng Wang Chuan-Fei Jiang Hong Yang School of Chemistry and Chemical Engineering State Key Laboratory of Digital Medical EngineeringSoutheast UniversityNanjingJiangsu211189 China

Crosslinked liquid crystal polymers(CLCPs)are smart materials that combine the anisotropy of liquid crystals(LCs)with the elasticity of *** subjected to external stimuli,they exhibit exceptional two-way shape memory *** the various stimuli,electrical energy has the advantages of cleanliness,stability,and high controllability;hence,it is widely used for controlling CLCP-based soft actuators,thus presenting potential for application in diverse,complex *** combining electrically driven mode and sensor equipment,precise control of CLCPs can be achieved,and the electrically driven CLCPs can accomplish more intricate and sophisticated *** study presents a comprehensive review of electrically driven CLCPs with various driving mechanisms,including the electroclinic effect of ferroelectric CLCPs,the reorganization of LC molecules,the Maxwell effect of dielectric CLCPs,and the Joule heating effect of electrothermally responsive CLCP *** addition,a detailed analysis of the applications of electrically driven CLCPs in various research fields is ***,the current challenges in the field of electrically driven CLCP technology are summarized,along with predictions for future prospects.

关键词： Liquid crystal polymers Stimuli-responsive polymers Electrothermal materials Energy conversion Soft actuators

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Influence of water vapor on the separation of volatile organic compound/nitrogen mixture by polydimethylsiloxane membrane

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Chinese Journal of chemical engineering 2023年第12期64卷 26-36页

作者： Yifan Liang Haibo Lei Xinlei He Haoli Zhou Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Low-Carbon Technology and Chemical Reaction Engineering Laboratory School of Chemical EngineeringSichuan UniversityChengdu 610065China College of Basic Science Tianjin Agricultural UniversityTianjin 300392China Zhangjiagang Institute of Nanjing Tech University Suzhou 215699China

In the industrial treatment of waste volatile organic compound(VOC)streams by membrane technology,a third impurity,generally,water vapor,coexists in the mixture of VOC and nitrogen or air,and can affect membrane performance and the design of the industrial *** study focused on the investigation of the effect of water vapor on the separation performance of the separation of VOC/water/nitrogen mixtures by a polydimethylsiloxane(PDMS)*** types of VOCs:water-miscible ethanol,water-semi-miscible butanol,and water-immiscible cyclohexane,were selected for the *** operating parameters including,concentration of the feed VOC,feed temperature,and concentration of the feed water were compared for the separation of binary and ternary VOC/nitrogen *** interaction between the VOC and water was analyzed to explain the transportation mechanism after analyzing the difference in the membrane performance for the separation of binary and ternary *** results indicated that the interaction between the VOC(or nitrogen)and water is the key factor affecting membrane *** can promote the permeation of hydrophilic VOC but prevent hydrophobic VOC through the membrane for the separation of ternary VOC/water/nitrogen *** results will provide fundamental insights for the design of the recovery application process for industrial membrane-based VOCs,and also guidance for the investigation of the separation mechanism in vapor permeation.

关键词： Water vapor Ternary mixtures Polydimethylsiloxane Membranes Permeability Selectivity

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Mn‐doped CeO2 derived from Ce-MOF porous nanoribbons as highly active catalysts for the synthesis of dimethyl carbonate from CO2 and methanol

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Environmental Science and Pollution Research 2024年第35期31卷 47911-47922页

作者： Wang, Fei Jin, Yulong Xue, Yun Yu, Shuihang Liu, Na Ma, Qingxiang Xu, Jie Xue, Bing Wei, Xuejiao Jiangsu Province Key Laboratory of Fine Petrochemical Engineering Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical and Engineering Changzhou University Changzhou213164 China State Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering College of Chemistry and Chemical Engineering Ningxia University Yinchuan750021 China School of Chemical Engineering and Materials Changzhou Institute of Technology Changzhou213164 China

It is desirable but challenging to develop highly-efficient catalysts for the direct synthesis of dimethyl carbonate (DMC) from methanol and CO2. The vacancy-mediated incorporation of heteroatom into surface reconstruction is an efficient method of defect engineering for enhancing the catalytic properties. In this work, manganese-doped cerium oxide porous nanoribbons (Mn/CeO2-BTC) were prepared derived from a Ce-BTC by a sacrificial template approach. It is found that the catalytic activity of Mn/CeO2-BTC catalysts can be readily controlled by varying the amount of Mn dopants and the as-synthesized 0.1-Mn/CeO2-BTC exhibited an outstanding activity for the synthesis of DMC from CO2 and methanol, which reached a high DMC yield (6.53 mmolDMC/gcat.) without any dehydrating agents. Based on characterization results, the enhanced performance may be attributed to the defective structures caused by Mn doping and the porous nanoribbons of the CeO2 crystals, which provide more surface oxygen vacancies and acidic-basic sites, favoring adsorption and activation of CO2 and methanol. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Oxygen vacancies

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Enabling superior electrochemical performance of NCA cathode in Li_(5.5)PS_(4.5)Cl_(1.5)-based solid-state batteries with a dual-electrolyte layer

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Chinese chemical Letters 2024年第4期35卷 231-236页

作者： Ziling Jiang Shaoqing Chen Chaochao Wei Ziqi Zhang Zhongkai Wu Qiyue Luo Liang Ming Long Zhang Chuang Yu School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Innovation Center for Chemical Sciences College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China College of Physics and Energy Fujian Normal UniversityFuzhou 350117 China

LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA) is a promising cathode for sulfide-based solid-state lithium batteries(ASSLBs)profiting from its high specific capacity and voltage plateau, which yielding high energy density. However, the inferior interfacial stability between the bare NCA and sulfides limits its electrochemical performance. Hereien, the dual-electrolyte layer is proposed to mitigate this effect and enhance the battery performances of NCA-based ASSLIBs. The Li_(3)InCl_6 wih high conductivity and excellent electrochemcial stability act both as an ion additives to promote Li-ion diffusion across the interface in the cathode and as a buffer layer between the cathode layer and the solid electrolyte layer to avoid side reactions and improve the interface stability. The corresponding battery exhibits high discharge capacities and superior cyclabilities at both room and elevated temperatures. It exhibits discharge performance of 237.04 and216.07 m Ah/g at 0.1 and 0.5 C, respectively, when cycled at 60 ℃, and sustains 95.9% of the capacity after100 cycles at 0.5 C. The work demonstrates a simple strategy to ensure the superior performances of NCA in sulfide-based ASSLBs.

关键词： LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2) Li_(5.5)PS_(4.5)Cl_(1.5) Double solid electrolyte layer configuration Operating temperatures Electrochemical performances

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Optimizing the ORR performance of PtMnM ternary intermetallics by tuning the surface strain

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Science China Chemistry 2025年第2期68卷 536-542页

作者： Min Song Guanyu Luo Qian Zhang Hanyu Hu Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Identifying the descriptors that control catalytic performance is key to design catalysts with high activity and *** indirect descriptors related to catalytic activity,modulating the Pt–Pt interatomic distance and d-band center can effectively enhance the ORR *** is well recognized that the Pt–Pt interatomic distance is strongly correlated with the surface ***,PtMnM/C ternary intermetallics are constructed through partially replacing Mn in PtMn/C binary intermetallics with the other transition metal(M=Fe,Co,Ni,and Cu).The 3d-transition metal doping induces surface strain,and the ORR performance of PtMnM/C exhibits volcano relationship relative to both the Pt–Pt interatomic distance and d-band *** PtMnCo/C with optimum strain exhibits the highest mass activity(1.06 A mgPt^(−1))at 0.9 V,which is 2.6 and 4.6 times higher than that of PtMn/C and commercial Pt/C catalysts,*** addition,PtMnCo/C shows good durability with only 10 mV half-wave potential decay after 50,000 potential cycles.

关键词： oxygen reduction reaction electrocatalysts ternary intermetallics surface strain electronic structure

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Preparation of EVAM-g-NSiO_(2)nanocomposite pour point depressant and its effect on rheological properties of model waxy oil

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Petroleum Science 2025年第1期22卷 472-480页

作者： Yi-Hai Yang Li-Na Zhang Zheng-Nan Sun Ming-Xing Bai Guo-Lin Jing Yang Liu Xiao-Yan Liu Provincial Key Laboratory of Oil&Gas Chemical Technology College of Chemistry&Chemical EngineeringNortheast Petroleum UniversityDaqing163318HeilongjiangChina School of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina School of Mechanical Science and Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina

Modified ethylene-vinyl acetate copolymer(EVAM)and amino-functionalized nano-silica(NSiO_(2))par-ticles were employed as the base materials for the synthesis of the nanocomposite pour point depressant designated as EVAM-g-NSiO_(2).This synthesis involved a chemical grafting process within a solution system,followed by a structural ***,combining macro-rheological performance with microscopic structure observation,the influence of the nanocomposite pour point depressant on the rheological properties of the model waxy oil system was *** results indicate that when the mass ratio of NSiO_(2) to EVAM is 1:100,the prepared EVAM-g-NSiO_(2) nanocomposite pour point depressant exhibits excellent pour point reduction and viscosity reduction ***,the nanocomposite pour point depressant obtained through a chemical grafting reaction demonstrates structural stability(the bonding between the polymer and nanoparticles is stable).The pour points of model waxy oils doped with 500 mg/kg ethylene-vinyl acetate copolymer(EVA),EVAM,and EVAM/SiO_(2) were reduced from 34℃ to 23,20,and 21℃,*** adding the same dosage of EVAM-g-NSiO_(2) nanocomposite pour point depressant,the pour point of the model wax oil decreased to 12℃ and the viscosity at 32℃ decreased from 2399 to 2396.9 mPa·s,achieving an impressive viscosity reduction rate of 99.9%.Its performance surpassed that of EVA,EVAM,and EVAM/SiO_(2).The EVAM-g-NSiO_(2) dispersed in the oil phase acts as the crystallization nucleus for wax crystals,resulting in a dense structure of wax *** compact wax crystal blocks are difficult to overlap with each other,pre-venting the formation of a three-dimensional network structure,thereby improving the low-temperature flowability of the model waxy oil.

关键词： Model waxy oil Nanoparticle Pour point depressant Rheological properties Microstructure

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N and O vacancies regulation over semiconductor heterojunction to synergistically boost photocatalytic hydrogen peroxide production

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Journal of Materials Science & technology 2024年第29期196卷 237-247页

作者： Chaoqian Ai Bing Luo Chunyang Zhang Yadi Wang Baoyuan Wang Lijing Ma Dengwei Jing International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China Department of Chemical Engineering School of Water and Environment&Key Laboratory of Subsurface Hydrology and Ecology in Arid AreasMinistry of Education Chang’an UniversityXi’an 710054China

Defect engineering represents a potent strategy for the modification of electronic properties by introducing atomic vacancies in ***,the synergistic enhancement attributable to different types of atomic vacancies within a heterojunction,as well as their underlying mechanisms,remains sparsely ***,the flexible g-C_(3)N_(4)materials with varying nitrogen vacancies were prepared via a facile calcination method under different atmospheric conditions and then composited with CeO_(2)nanocubes to construct Z-scheme *** was observed that CeO_(2)has abundant O vacancies,and the g-C_(3)N_(4)form tertiary nitrogen defects at the center of the heptazine units under an NH3 atmosphere *** resulting enhancement in the interfacial built-in electric field,coupled with the synergistic effect of O and N vacancies within the Z-scheme heterojunction,has been demonstrated to significantly enhance charge transfer *** results in an optimized photoactivity with a H_(2)O_(2)generation rate of 2.01 mmol g^(-1)h^(-1).This work opens an avenue for constructing and optimizing the heterogeneous photocatalysts by defect engineering technology,and provides deep insight to understand the nature of vacancy engineering in designing effective catalysts for solar energy conversion.

关键词： Photocatalysis H_(2)O_(2) production Z-scheme Defect engineering Synergy effect

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High-performance humidity sensor based on Ag-doped ZnGa₂O₄/ZnO composite nanofibers

RSC Applied Interfaces

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RSC Applied Interfaces 2024年第6期1卷 1233-1240页

作者： Sun, Chunhua Li, Wenjing Lv, Ze Guo, Ying State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology 98 Beijing 100029 China School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China

Ag-doped ZnGa2O4/ZnO composite nanofibers (ZG-Ag) were synthesized using electrostatic spinning followed by calcination. Compared to undoped ZnGa2O4/ZnO composite nanofibers (ZG), Ag-doped ZnGa2O4/ZnO composite varian...

Ag-doped ZnGa₂O₄/ZnO composite nanofibers (ZG-Ag) were synthesized using electrostatic spinning followed by calcination. Compared to undoped ZnGa₂O₄/ZnO composite nanofibers (ZG), Ag-doped ZnGa₂O₄/ZnO composite variants exhibited superior room-temperature humidity sensing capabilities. Notably, the humidity-sensitive performance of the Ag-doped ZnGa₂O₄/ZnO composite nanofibers can be tuned by adjusting the Ag content, achieving a reliable wet hysteresis of 2.81% and a rapid response and recovery time of 1.5 and 2 seconds, respectively. The humidity sensing mechanism of the composites was also investigated. Compounding ZnO with ZnGa₂O₄ was found to mitigate the hysteresis issue, while the porous nanofiber structure and doping with Ag increased oxygen vacancies and conductivity. These enhancements collectively contributed to an improved sensitivity to water molecules. © 2024 RSC.

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