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Efficient remediation of different concentrations of Cr-contaminated soils by nano zero-valent iron modified with carboxymethyl cellulose and biochar

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Journal of Environmental sciences 2025年第1期147卷 474-486页

作者： Lihong xie Qiyan Ma Qingjun Chen Yiyang Liu Pengfei guo Jinlan Zhang guilan Duan Aijun Lin Tingting Zhang shangyi Li Department of Environmental science and Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China China National Petroleum and Chemical Planning Institute Beijing 100013China state Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Nano zero-valent iron(nZVI)is widely used in soil remediation due to its high ***,the easy agglomeration,poor antioxidant ability and passivation layer of Fe-Cr coprecipitates of nZVI have limited its application scale in Cr-contaminated soil remediation,especially in high concentration of Cr-contaminated ***,we found that the carboxymethyl cellulose on nZVI particles could increase the zeta potential value of soil and change the phase of *** with the presence of biochar,97.0%and 96.6%Cr immobilization efficiency through CMC-nZVI/BC were respectively achieved in high and low concentrations of Cr-contaminated soils after 90-days *** addition,the immobilization efficiency of Cr(VI)only decreased by 5.1%through CMC-nZVI/BC treatment after 10 weeks aging in air,attributing to the strong antioxidation *** for the surrounding Crcontaminated groundwater,the Cr(VI)removal capacity of CMC-nZVI/BC was evaluated under different reaction conditions through column experiments and COMsOL ***-nZVI/BC could efficiently remove 85%of Cr(VI)in about 400 hr when the initial Cr(VI)concentration was 40 mg/L and the flow rate was 0.5 mL/*** study demonstrates that uniformly dispersed CMC-nZVI/BC has an excellent remediation effect on different concentrations of Cr-contaminated soils.

关键词： Carboxymethyl cellulose Nanoscale zero-valent iron Biochar Cr-contaminated soils

Restoration of High-Renewable-Penetrated Distribution systems Considering Uncertain Repair Workloads

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CsEE Journal of Power and Energy systems 2025年第1期11卷 150-162页

作者： Xiaotian sun Haipeng xie Zhaohong Bie gengfeng Li state Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an710049China

In distribution systems with high penetration of renewable energy, fast restoration after extreme events faces a variety of uncertainties from the output of distributed renewable generations, as well as incomplete knowledge on accurate repair workloads of fault components. Considering these uncertainties, this paper proposes an implicit decision rule based restoration-oriented combined unit-crew dispatch (RCUCD) method to boost the ex-post restoration. First, a “wait and see” uncertainty model is presented to depict the non-anticipativity of repair workloads of fault components. Thereby, a dynamic crew grouping dispatch algorithm is proposed to address the uncertainties in repair workloads based on the improved time-space network theory. Further, a multi-stage stochastic RCUCD model is set up for post-disaster restoration. Based on implicit decision rules, the proposed model is reformulated into a mixed integer linear programming (MILP) problem by introducing axillary safety region variables. To boost computational efficiency, the simplified RCUCD model, as well as the rolling look-ahead RCUCD model is proposed. The effectiveness and efficiency of the proposed methods are tested on IEEE 34-bus and 69-bus distribution systems.

关键词： Implicitdecision rule non-anticipativity renewable energy repair crew restoration

Thickness and sp3 bond modulation of（Ti/tetrahedral amorphous carbon）_n multilayer coatings

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Tungsten 2025年第1期7卷 152-160页

作者： Zhi-Jun xie Jia-Lin Li Ling gong Xiang-Li Zhong Hong-Jia song Jin-Bin Wang National-Provincial Laboratory of special Function Thin Film Materials School of Materials Science and Engineering Xiangtan University

The durability of wear-resistant tetrahedral amorphous carbon（ta-C） coatings is intimately linked to their thickness and the concentration of *** enhance the lifespan of the coatings,we have prepared a multilayer coating consisting of alternating layers of Ti and ta-C,denoted as（Ti/ta-C）_n,using arc ion plating.A multi-layer structure in conjunction with stage cooling is employed to enhance the thickness and promote *** results indicate that the ID/Igvalue,representing the ratio of the intensity of the D peak to that of the g peak in Raman spectroscopy,decreases from 0.85 when no stage cooling is applied to 0.35 when stage cooling is employed,suggesting an enhancement in the fraction of sp3bonds within the *** obtained（Ti/ta-C）_n multilayer coating without peeling off has a maximum thickness of 1.14 μm,which is almost double that of the ta-C coating single layer *** the same time,the coating has a low coefficient of friction,down to 0.069,and maintains excellent friction properties with a wear rate of 3.4×10-6mm3·N-1·*** results conclusively show that the preparation technology can enhance both thickness and sp3bonding in ta-C coatings,significantly expanding their utility across tools,molds,and precision engineering components.

关键词： Arc ion plating Multilayer structure sp3 bond Ta-C coating Wear resistance

Hydrogen bond-induced conduction loss for enhanced electromagnetic attenuation in deep eutectic gel absorbers

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 738-746页

作者： Yuntong Wang shengchong Hui Zhaoxiaohan shi Zijing Li geng Chen Tao Zhang Xinyue xie Limin Zhang Hongjing Wu MOE Key Laboratory of Material Physics and Chemistry under Extraordinary School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710072China Queen Mary University of London Engineering school Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in shenzhen Shenzhen 518063China

gels and conductive polymer composites,including hydrogen bonds(HBs),have emerged as promising materials for electro-magnetic wave(EMW)absorption across various ***,the relationship between conduction loss in EMW-absorbing materials and charge transfer in HB remains to be fully *** this study,we developed a series of deep eutectic gels to fine-tune the quantity of HB by adjusting the molar ratio of choline chloride(ChCl)and ethylene glycol(Eg).Owing to the unique properties of deep eutectic gels,the effects of magnetic loss and polarization loss on EMW attenuation can be *** results indicate that the quantity of HB initially increases and then decreases with the introduction of Eg,with HB-induced conductive loss following similar *** a ChCl and Eg molar ratio of 2.4,the gel labeled g22-CE2.4 exhibited the best EMW absorption performance,characterized by an effective absorption bandwidth of 8.50 gHz and a thickness of 2.54 *** superior performance is attributed to the synergistic ef-fects of excellent conductive loss and impedance matching generated by the optimal number of *** work elucidates the role of HB in dielectric loss for the first time and provides valuable insights into the optimal design of supramolecular polymer absorbers.

关键词： absorbers hydrogen bonds deep eutectic gels dielectric properties conduction loss

Neurotransmitter-mediated artificial synapses based on organic electrochemical transistors for future biomimic and bioinspired neuromorphic systems

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Journal of semiconductors 2025年第1期46卷 78-89页

作者： Miao Cheng Yifan xie Jinyao Wang Qingqing Jin Yue Tian Changrui Liu Jingyun Chu Mengmeng Li Ling Li Key Lab of Fabrication Technologies for Integrated Circuits Chinese Academy of SciencesBeijing 100029China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of sciences 100049 BeijingChina

Organic electrochemical transistors have emerged as a solution for artificial synapses that mimic the neural functions of the brain structure,holding great potentials to break the bottleneck of von Neumann ***,current artificial synapses rely primarily on electrical signals,and little attention has been paid to the vital role of neurotransmitter-mediated artificial *** is a key neurotransmitter associated with emotion regulation and cognitive processes that needs to be monitored in real time to advance the development of disease diagnostics and *** provide insights into the development of artificial synapses with neurotransmitter involvement,this review proposes three steps towards future biomimic and bioinspired neuromorphic *** first summarize OECT-based dopamine detection devices,and then review advances in neurotransmitter-mediated artificial synapses and resultant advanced neuromorphic ***,by exploring the challenges and opportunities related to such neuromorphic systems,we provide a perspective on the future development of biomimetic and bioinspired neuromorphic systems.

关键词： artificial synapses organic electrochemical transistors neurotransmitters neuromorphic systems

Bioinspired Ultrasensitive Flexible strain sensors for Real‑Time Wireless Detection of Liquid Leakage

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Nano-Micro Letters 2025年第3期17卷 310-327页

作者： Weilong Zhou Yu Du Yingying Chen Congyuan Zhang Xiaowei Ning Heng xie Ting Wu Jinlian Hu Jinping Qu Key Laboratory of Material Chemistry for Energy Conversion and storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China school of Materials science and Engineering Wuhan Institute of TechnologyWuhan 430205People’s Republic of China Department of Biomedical Engineering City University of Hong KongHong KongSAR 999077People’s Republic of China

Liquid leakage of pipeline networks not only results in considerableresource wastage but also leads to environmental pollution and ecological *** response to this global issue, a bioinspired superhydrophobic thermoplastic polyurethane/carbon nanotubes/graphene nanosheets flexible strain sensor (TCgs) hasbeen developed using a combination of micro-extrusion compression molding andsurface modification for real-time wireless detection of liquid leakage. The TCgsutilizes the synergistic effects of Archimedean spiral crack arrays and micropores,which are inspired by the remarkable sensory capabilities of scorpions. This designachieves a sensitivity of 218.13 at a strain of 2%, which is an increase of 4300%. Additionally, it demonstrates exceptional durability bywithstanding over 5000 usage cycles. The robust superhydrophobicity of the TCgs significantly enhances sensitivity and stability indetecting small-scale liquid leakage, enabling precise monitoring of liquid leakage across a wide range of sizes, velocities, and compositionswhile issuing prompt alerts. This provides critical early warnings for both industrial pipelines and potential liquid leakage scenariosin everyday life. The development and utilization of bioinspired ultrasensitive flexible strain sensors offer an innovative and effectivesolution for the early wireless detection of liquid leakage.

关键词： Thermoplastic polyurethane Bioinspired Cracks Liquid leakage Flexible strain sensor

Reversible Li plating regulation on graphite anode through a barium sulfate nanofibers-based dielectric separator for fast charging and high-safety lithium-ion battery

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Journal of Energy Chemistry 2025年第2期101卷 511-523页

作者： Yaxin Zhang Long Cheng Ying-Jie Zhu Jin Wu Han-Ping Yu sida xie Dandan Li Zhaohui Wang Heng Li state Key Laboratory of High Performance Ceramics and superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences College of Materials science and Engineering Hunan University Center of Materials science and Optoelectronics Engineering University of Chinese Academy of Sciences

Poor Li plating reversibility and high thermal runaway risks are key challenges for fast charging lithiumion batteries with graphite ***,a dielectric and fire-resistant separator based on hybrid nanofibers of barium sulfate（Bs） and bacterial cellulose（BC） is developed to synchronously enhance the battery's fast charging and thermal-safety *** regulation mechanism of the dielectric Bs/BC separator in enhancing the Li+ion transport and Li plating reversibility is revealed.（1） The Max-Wagner polarization electric field of the dielectric Bs/BC separator can accelerate the desolvation of solvated Li+ions,enhancing their transport kinetics.（2） Moreover,due to the charge balancing effect,the dielectric Bs/BC separator homogenizes the electric field/Li+ion flux at the graphite anode-separator interface,facilitating uniform Li plating and suppressing Li dendrite ***,the fast-charge graphite anode with the Bs/BC separator shows higher Coulombic efficiency（99.0% vs.96.9%） and longer cycling lifespan（100 cycles vs.59 cycles） than that with the polypropylene（PP） separator in the constantlithiation cycling test at 2 mA *** high-loading LiFePO4(15.5 mg cm-2)//graphite(7.5 mg cm-2) full cell with the Bs/BC separator exhibits excellent fast charging performance,retaining 70% of its capacity after 500 cycles at a high rate of 2C,which is significantly better than that of the cell with the PP separator（retaining only 27% of its capacity after 500 cycles）.More importantly,the thermally stable Bs/BC separator effectively elevates the critical temperature and reduces the heat release rate during thermal runaway,thereby significantly enhancing the battery's safety.

关键词： Fast charging graphite anode Ion transport Lithium-ion battery separator

Effect of rolling schedules on ridging resistance of ultra-thin ferritic stainless steel foil

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Journal of Iron and steel Research International 2025年第1期32卷 198-214页

作者： Jing-wei Zhao Qing-zhong xie Li-nan Ma Cun-long Zhou Zheng-yi Jiang Xi Liao Xiao-guang Ma College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan030024ShanxiChina Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan030024ShanxiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment Ministry of Science and TechnologyTaiyuan030024ShanxiChina school of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina school of Mechanical MaterialsBiomedical and Mechatronic EngineeringUniversity of WollongongWollongongNSW2522Australia shanxi Taigang stainless steel Precision strip Co. Ltd.Taiyuan 030006ShanxiChina

The effect of rolling schedules on the ridging resistance of ultra-thin ferritic stainless steel(Fss)430 foil was evaluated by studying the microstructure and *** results show that specimens processed with three-pass cold rolling under the reductions of 40%,40%and 31%,respectively,exhibit improved ridging resistance owing to the microstructural refinement and the texture structure optimization.A nearly 40%reduction of ridging height can be achieved using the proposed rolling schedule compared to the other two rolling *** addition,the effect of annealing temperature after cold rolling on the ridging resistance of Fss 430 foil is also found to be crucial,and an optimal annealing temperature of 900℃ is obtained for Fss 430 foil with high ridging ***,the improvement in the ridging resistance of Fss 430 foil can be attributed to the reduction in the fraction of{001}and{114}components by optimization of the rolling and annealing processes.

关键词： Ferritic stainless steel foil Ridging Cold rolling Annealing Microstructure Texture

A matrix metalloproteinase-responsive hydrogel system controls angiogenic peptide release for repair of cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2025年第2期20卷 503-517页

作者： Qi Liu Jianye xie Runxue Zhou Jin Deng Weihong Nie shuwei sun Haiping Wang Chunying shi Department of Human Anatomy Histology and EmbryologySchool of Basic MedicineQingdao UniversityQingdaoShandong ProvinceChina Department of Neurology The Affiliated Hospital of Qingdao UniversityQingdaoShandong ProvinceChina Department of general Practice The Affiliated Hospital of Qingdao UniversityQingdaoShandong ProvinceChina

Vascular endothelial growth factor and its mimic peptide KLTWQELYQLKYKgI(QK)are widely used as the most potent angiogenic factors for the treatment of multiple ischemic ***,conventional topical drug delivery often results in a burst release of the drug,leading to transient retention(inefficacy)and undesirable diffusion(toxicity)in ***,a drug delivery system that responds to changes in the microenvironment of tissue regeneration and controls vascular endothelial growth factor release is crucial to improve the treatment of ischemic *** metalloproteinase-2(MMP-2)is gradually upregulated after cerebral ***,vascular endothelial growth factor mimic peptide QK was self-assembled with MMP-2-cleaved peptide PLgLAg(TIMP)and customizable peptide amphiphilic(PA)molecules to construct nanofiber hydrogel ***-TIMP-QK was found to control the delivery of QK by MMP-2 upregulation after cerebral ischemia/reperfusion and had a similar biological activity with vascular endothelial growth factor in *** results indicated that PA-TIMP-QK promoted neuronal survival,restored local blood circulation,reduced blood-brain barrier permeability,and restored motor *** findings suggest that the self-assembling nanofiber hydrogel PA-TIMP-QK may provide an intelligent drug delivery system that responds to the microenvironment and promotes regeneration and repair after cerebral ischemia/reperfusion injury.

关键词： angiogenesis biomaterial blood-brain barrier cerebral ischemia/reperfusion injury control release drug delivery inflammation QK peptides matrix metalloproteinase-2 neuroprotection self-assembling nanofiber hydrogel