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Science China Chemistry 2025年

作者： Xiaofang Shi nan Shi Miaomiao Dang Chengyu Ji Yingjie Li Peiyi Wu Zhiguo Hu Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials School of Chemistry and Chemical Engineering Henan Normal University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Chemistry Chemical Engineering and Biotechnology & Center for Advanced Low-dimension Materials Donghua University

The conventional method of fabricating hydrogels constantly confronts the conflict between elasticity and toughness, limiting their repetitive application. Achieving the desired elasticity through a simple and low-cost approach is a significant challenge for hydrogels, particularly through rational molecular design. Here, low-hysteresis and high-toughness hydrogels are developed from the design of a new feature monomer, N-acryloylethylsemicarbazide (NACE). Based on a concept of “asymmetric Hbonding design”, the unique double and triple H-bonding of NACE can result in a novel asymmetric crosslinking polymer with alternating strong and weak H-bonding regions. The NACE is copolymerized with acrylamide (AM) to regulate the mechanical properties of hydrogel via H-bonding density. The P(NACE-AM) ionic hydrogels are obtained simply and rapidly via one-step photopolymerization without a chemical cross-linking agent. The P(NACE-AM) hydrogels combine superb mechanical elasticity and toughness, and excellent ionic conductivity, showing great potential as durable ionic conductive devices for wearable utilization.

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Multi-dimensional Bi@C electrocatalyst for Cr3+/Cr2+ redox reaction boosting high-performance iron-chromium flow batteries

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Science China Chemistry 2025年

作者： Min Wu Mingjun nan Shumin Liu Caihe Zhong Lin Qiao Huamin Zhang Xiangkun Ma Department of Materials Science and Engineering Dalian Maritime University Division of Energy Storage Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences

With the increasing demand for energy storage technology, iron-chromium flow batteries（ICFBs） have been widely concerned because of their price advantage. However, the low electrochemical activity of Cr3+/Cr2+redox couples and the side hydrogen evolution reaction limit the industrial application of ICFBs. A multi-dimensional Bi/carbon composite electrocatalyst（Bi@C）for ICFB is designed and prepared to improve the electrochemical activity of Cr3+/Cr2+redox couples. Benefiting by using the Bimetal organic framework（Bi-MOF） with solid matrix as precursors, Bi nanospheres are highly dispersed on the Bi@C electrocatalyst that effectively enhances the electrochemical activity. The special morphology of Bi@C electrocatalyst helps the transfer of electrons and ions, significantly reducing the polarization of battery. Herein, the 3D porous carbon frames accelerate mass transfer, and the 2D carbon nanobelts and carbon layer coating on 0D Bi nanospheres improve the conductivity of Bi nanospheres. Therefore, the ICFB with multi-dimensional Bi@C electrocatalyst exhibits coulombic efficiency of 98.10% and energy efficiency of 79.14% at 140 mA cm-2, which is higher than ICFBs with commercial graphite carbon electrocatalyst and with heat treatment carbon felt. This work provides a simple and economical method to fabricate a high-performance multidimensional Bi@C electrocatalyst for Cr3+/Cr2+redox couples, boosting the development of ICFBs.

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Understanding the role of alloyed Ni and Cu on improving corrosion resistance of low alloy steel in the simulated Beishan groundwater

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Journal of Materials Science & Technology 2022年第35期130卷 124-135页

作者： Yupeng Sun Xin Wei Junhua dong nan Chen Hanyu Zhao Qiying ren Wei Ke School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Environmental Corrosion Centre of Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The corrosion behavior of NiCu low alloy steel and Q235 low carbon steel as the candidate materials for geological disposal containers of high-level radioactive waste in the simulated Beishan groundwater was comparatively studied by weight loss test,electrochemical measurements,scanning electron microscope(SEM),electron probe microanalysis(EPMA),X-ray diffraction(XRD),Raman spectrum and X-ray photoelectron spectroscopy(XPS).The electrochemical results showed that the corrosion potential of NiCu steel and Q235 steel gradually increased with the immersion ***,the cathodic process transited from hydrogen evolution reaction(HER) control to the rust reduction control,while the anodic process was always dominated by the active dissolution of *** comparison,both the cathodic resistance and the anodic dissolution resistance of NiCu steel corrosion were apparently higher than that of Q235 *** results of rust layer characterization indicated that Ni and Cu elements could be enriched in the inner rust layer of NiCu steel and the rust layer was more *** the main corrosion products,the content of α-FeOOH in the rust layer of NiCu steel was obviously increased more than that of Q235 ***_(6)(OH)_(12)SO_(4)stably existed in the corrosion products of NiCu steel because Ni(Ⅱ) or Cu(Ⅱ)could substitute Fe(Ⅱ) of Fe_(6)(OH)_(12)SO_(4)and increased its oxidation resistance,Moreover,Ni and Cu could also make Fe3O4ionic selective by *** the long-term immersion,the corrosion mass loss of NiCu steel was significantly lower than Q235 steel,which further confirmed the benefits of Ni and Cu alloying on improving the steel corrosion resistance.

关键词： Deep geological disposal Container material Groundwater Corrosion behavior Electrochemical measurement

A novel application of the SAWD-Sabatier-SPE integrated system for CO_2 removal and O_2 regeneration in submarine cabins during prolonged voyages

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第11期10卷 1642-1650页

作者： Zhi HUANG Zhao-bo CHEN nan-qi ren dong-xue HU dong-huan ZHENG Zhen-peng ZHANG State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China School of Materials Science & Chemical Engineering Harbin Engineering University Harbin 150001 China Institute of Environmental Science and Engineering Nanyang Technological University 637723 Singapore

To improve the working and living environment of submarine crews, an integrated system of CO2 removal and O2 regeneration was designed to work under experimental conditions for 50 people in a submarine cabin during prolonged voyages. The integrated system comprises a solid amine water desorption （SAWD） unit for CO2 collection and concentration, a Sabatier reactor for CO2 reduction and a solid polymer electrolyte （SPE） unit for O2 regeneration by electrolysis. The performances of the SAWD-Sabatier-SPE integrated system were investigated. The experimental results from the SAWD unit showed that the average CO2 concentration in the CO2 storage tank was more than 96% and the outlet CO2 concentration was nearly zero in the first 45 min, and less than 1/10 of inlet CO2 after 60 min when input CO2 was 0.5% （1000 L）. About 950 L of CO2 was recovered with a recovery rate of 92%-97%. The output CO2 concentration was less than 0.2%, which showed that the adsorption-desorption performance of this unit was excellent. In the CO2 reduction unit we investigated mainly the start-up and reaction performance of the Sabatier reactor. The start-up time of the Sabatier reactor was 6, 8 and 10 rain when the start-up temperature was 187.3, 179.5 and 168 ℃, respectively. The product water was colorless, transparent, and had a pH of 6.9-7.5, and an electrical conductivity of 80μs/cm. The sum of the concentration of metal ions （Ru^3＋, Al^3＋, Pb^2＋） was 0.028% and that of nonmetal ions （Cl^-, SO4^2-） was 0.05%. In the O2 regeneration unit, the O2 generation rate was 0.48 m^3/d and the quantity was 2400 L, sufficient to meet the submariners＇ basic oxygen demands. These results may be useful as a basis for establishing CO2-1evel limits and O2 regeneration systems in submarines or similar enclosed compartments during prolonged voyages.

关键词： CO2 removal O2 regeneration Solid amine water desorption (SAWD) Sabatier reactor Solid polymer electrolyte (SPE) Submarine

Performance of a subsurface-flow constructed wetland in Southern China

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Journal of Environmental Sciences 2004年第3期16卷 476-481页

作者： SHILei WANGBao-zhen CAOXiang-dong WangJin LEIZhi-hong WANGZhi-ren LIUZheng-ying LUBing-nan FacultyofMunicipalandEnvironmentalEngineering.HarbinInstituteofTechnology Harbin150006China LonggangDistrictEnvironmentalProtectionAgencyofShenzhenCity LonggangDistrict.Shenzhen518000China ShenzhenInstituteofEnvironmentScience.Shenzhen518000.China LongtianShatianSewageManageCo. Ltd.Shenzhen518000China

The operational performance of a full scale subsurface flow constructed wetland, which treated the mixed industrial and domestic wastewater with BOD 5/COD mean ratio of 0 33 at Shatian, Shenzhen City was studied. The constructed wetland system consists of screens, sump, pumping station, and primary settling basin, facultative pond, first stage wetland and secondary stage wetland. The designed treatment capacity is 5000 m 3/d, and the actual influent flow is in the range of 10000 m 3/d. Under normal operational conditions, the final effluent quality well met the National Integrated Wastewater Discharge Standard(GB 8978\_1996), with the following parameters(mean values): COD 33 90 mg/L, BOD 5 7.65 mg/L, TSS 7.92 mg/L, TN 9.11 mg/L and TP 0 56 mg/L. Seven species of plants were selected to grow in the wetland: Reed, Sweetcane flower Silvergrass, Great Bulrush, Powdery Thalia and Canna of three colours. The growing season is a whole year round. The seasonal discrepancy could be observed and the plants growing in the wetland are vulnerable to lower temperature in winter. The recycling of the effluent in the first stage of the wetland system is an effective measure to improve the performance of the wetland system. The insufficient DO value in the wetland system not only had significant effect on pollutants removal in the wetland, but also was unfavourable to plant growth. The recycling of effluent to the inlet of wetland system and artificial pond to increase DO value of influent to the wetland is key to operate the subsurface constructed wetland steadily and effectively.

关键词： subsurface flow constructed wetland operational performance marsh plants pre treatment facultative pond

Polyoxometalate-based nanozyme： Design of a multifunctional enzyme for multi-faceted treatment of Alzheimer＇s disease

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nano Research 2016年第4期9卷 1079-1090页

作者： nan Gao Kai dong Andong Zhao Hanjun Sun Ying Wang Jinsong ren Xiaogang Qu Laboratory of Chemical Biology and State Key laboratory of Rare Earth Resources Utilization Changchun Institute of Appfied Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences Changchun 130022 China

Proteolytic degradation of amyloid-β （Aβ） aggregates and clearance of Aβ- induced reactive oxygen species （ROS） have received significant attention for the treatment of Alzheimer＇s disease （AD）. However, it is difficult, and often unfeasible, to directly upregulate or transport intraceUular native enzymes. More importantly, penetration of the blood-brain barrier （BBB） has presented a major impediment. Herein, we report on the rational design of a polyoxometalate- based nanozyme with both protease-like activity for depleting A~ aggregates, and superoxide dismutase （SOD）-like activity for scavenging A[3-mediated ROS. Furthermore, this nanozyme acts as a metal chelator to remove Cu from Cu-induced Aβ oligomers. More intriguingly, the nanozyme can cross the BBB and exhibits low toxicity. This work provides new insights into the design and synthesis of inorganic nanozymes as multifunctional therapeutic agents in the treatment of AD.

关键词： polyoxometalates nanozymes protease activities superoxide dismutase(SOD) activities Alzheimer's disease

Platinum-coordinated graphitic carbon nitride nanosheet used for targeted inhibition of amyloid β-peptide aggregation

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nano Research 2016年第8期9卷 2411-2423页

作者： Meng Li Yijia Guan Zhaowei Chen nan Gao Jinsong ren Kai dong Xiaogang Qu Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Science Changchun 130022 China University of Chinese Academy of Sciences Beijing 100039 China

Amyloid β-peptide （Aβ） aggregation is a critical step in the pathogenesis of Alzheimer＇s disease （AD）. Inhibition of A[3 production, dissolution of existing aggregates and clearance of Aβ represent valid therapeutic strategies against AD. Herein, a novel platinum（II）-coordinated graphitic carbon nitride （g-C3N4） nanosheet （g-C3N4@Pt） has been designed to covalently bind to Aβ and modulate the peptide＇s aggregation and toxicity. Furthermore, g-CBN4@Pt nanosheets possess high photocatalytic activity and can oxygenate Aβ upon visible light irradiation, remarkably attenuating both the aggregation potency and neurotoxicity of Aβ Due to its ability to cross the blood-brain barrier （BBB） and its good biocompatibility, g-C3N4@Pt nanosheet is a promising inhibitor of Aβ aggregation. This study may serve as a model for the engineering of novel multifunctional nanomaterials used for the treatment of AD.

关键词： amyloid disease platinum graphitic carbon nitridenanosheet photooxygenation amyloid β-peptide (Aβ)inhibitors

习近平关于新质生产力重要论述的理论体系和实践指向研究

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新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 60-68页

作者：方世南苏州大学东吴智库苏州大学马克思主义学院江苏省习近平新时代中国特色社会主义思想研究中心苏州大学基地江苏苏州215006

习近平总书记关于新质生产力重要论述深刻阐明了新质生产力的基本内涵、本质特征、鲜明标志、核心要素、形成规律以及实现路径等重大理论和实践问题,是具有重大原创性、标识性、系统性、实践性的理论创新成果,是习近平新时代中国特色社... 详细信息

习近平总书记关于新质生产力重要论述深刻阐明了新质生产力的基本内涵、本质特征、鲜明标志、核心要素、形成规律以及实现路径等重大理论和实践问题,是具有重大原创性、标识性、系统性、实践性的理论创新成果,是习近平新时代中国特色社会主义思想的重要组成部分。习近平总书记关于新质生产力重要论述是在推进中国式现代化进程中形成的新的生产力理论,是指导我国经济社会高质量发展的学理化、体系化的理论体系,是具有深邃而丰富辩证法则的实践指向。

关键词：中国式现代化新质生产力重要论述理论体系实践指向

Method for Visual Localization of Oil and Gas Wellhead Based on Distance Function of Projected Features

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International Journal of Automation and computing 2017年第2期14卷 147-158页

作者： Ying Xie Xiang-dong Yang Zhi Liu Shu-nan ren Ken Chen Department of Mechanical Engineering Tsinghua University Beijing 100084 China Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control Beijing 100084 China State Key Laboratory of Tribology Beijing 100084 China

A localization method based on distance function of projected features is presented to solve the accuracy reduction or failure problem due to occlusion and blurring caused by smog, when dealing with vision based localization for target oil and gas wellhead （OGWH）. Firstly, the target OGWH is modeled as a cylinder with marker, and a vector with redundant parameter is used to describe its pose. Secondly, the explicit mapping relationship between the pose vector with redundant parameter and projected features is derived. Then, a 2D-point-to-feature distance function is proposed, as well as its derivative. Finally, based on this distance function and its derivative, an algorithm is proposed to estimate the pose of target OGWH directly according to the 2D image information, and the validity of the method is verified by both synthetic data and real image experiments. The results show that this method is able to accomplish the localization in the case of occlusion and blurring, and its anti-noise ability is good especially with noise ratio of less than 70%.

关键词： Robot vision visual localization 3D object localization model based pose estimation distance function of projectedfeatures nonlinear least squares random sample consensus (RANSAC).

Porous sodium titanate nanofibers for high energy quasi-solid-state sodium-ion hybrid capacitors

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Rare Metals 2022年第7期41卷 2453-2459页

作者： Sheng-Yang dong Yu-Lin Wu nan Lv Rui-Qi ren Liang Huang Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China

Sodium-ion hybrid capacitors(SICs)have considered as promising candidate for lithium-ion counterpart in large-scale energy storage due to their advantages of natural abundance,potential low cost,and high energy-power ... 详细信息

关键词： energy fibers Porous