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高强钢表面激光熔覆研究现状与进展

郑州航空工业管理学院学报 2024年第5期42卷 90-96页

作者：魏通达高阳常云峰王东亮王康龙秦建董宏伟郑州航空工业管理学院材料学院河南郑州450046 郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室河南郑州450001

高强钢具有高强度、高韧性、耐磨、耐腐蚀和耐高温等特点,广泛应用于航空、汽车、轨道交通及能源等多个领域。激光熔覆作为综合性能优良的先进表面改性技术,特别适用高强钢表面处理。围绕高强钢表面激光熔覆研究现状,重点介绍激光熔覆... 详细信息

高强钢具有高强度、高韧性、耐磨、耐腐蚀和耐高温等特点,广泛应用于航空、汽车、轨道交通及能源等多个领域。激光熔覆作为综合性能优良的先进表面改性技术,特别适用高强钢表面处理。围绕高强钢表面激光熔覆研究现状,重点介绍激光熔覆合金粉末成分设计、工艺参数选择、熔覆层组织和性能以及激光熔覆过程中数值模拟的应用等方面内容,并指出未来研究的发展趋势,为高强钢表面激光熔覆提供一定的参考。

关键词：高强钢激光熔覆工艺参数数值模拟

ESR signals from silk fabrics irradiated by UV-rays

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Nuclear Science and Techniques 2007年第5期18卷 268-271页

作者： LIU Ruiqin XIE Leidong SHENG kanglong School of Nuclear Science and Engineering Shanghai Jiaotong University Shanghai 200240 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

ESR studies were done on UV-ray irradiated silk fabric samples at room temperature. Different types of UV lamps were used and similar ESR signals were observed. The results indicate that UV-rays can produce free radicals for graft-copolymerization of monomer onto silk fibers without external additives or co additives, Also, radicals in silk fabrics irradiated by UV-rays are purer than that irradiated by γ-rays. The study suggests that UV-lights may be a better tool to improve properties of silk fabrics by grafting monomers onto the polymer chains.

关键词： UV-射线照射丝绸纤维天然高分子蛋白质

Ultrafine Co nanoparticles confined in nitrogen-doped carbon toward two-electron oxygen reduction reaction for H_(2)O_(2) electrosynthesis in acidic media

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Chinese Chemical Letters 2023年第11期34卷 263-268页

作者： Xiaoqing Cui Lijie Zhong Xu Zhao Jingxin Xie Dequan He Xin Yang kanglong Lin Huan wang Li Niu Guangdong Engineering Technology Research Center for Sensing Materials&Devices Guangzhou Key Laboratory of Sensing Materials&DevicesCenter for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringSchool of Civil EngineeringGuangzhou UniversityGuangzhou 510006China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Electrocatalytic production of hydrogen peroxide(H_(2)O_(2))by two-electron oxygen reduction reaction(2e^(-)ORR)under acidic condition has been considered to have great application *** nanoparticles(CoNPs)coupled with N-doped carbon are a class of potential *** effective strategies to further enhance their performances are to improve the active sites and ***,the material containing ultrafine CoNPs confined in a nitrogen-doped carbon matrix(NC@CoNPs)was synthesized by pyrolyzing corresponding precursors,which was obtained through regulating the topological structure of ZIF-67/ZIF-8 with dopamine(DA).The DA self-polymerization process induced the formation of CoNPs with smaller sizes and formed polydopamine film decreased the detachment of CoNPs from the *** density of Co-N_(x) active sites and defective sites could be identified on NC@CoNPs,leading to high activity and H_(2)O_(2) selectivity,with an onset potential of 0.57 V(***)and∼90%selectivity in a wide potential *** on-site electrochemical removal of organic pollutant was achieved rapidly through an electro-Fenton process,demonstrating its great promise for on-site water treatment application.

关键词： Oxygen reduction reaction H_(2)O_(2)production Confined Co nanoparticles Electrocatalysis Acidic media

Phosphorous and selenium tuning Co-based non-precious catalysts for electrosynthesis of H_(2)O_(2)in acidic media

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Chinese Chemical Letters 2024年第1期35卷 475-481页

作者： Jingxin Xie Lijie Zhong Xin Yang Dequan He kanglong Lin Xiaoxia Chen Huan wang Shiyu Gan Li Niu Guangdong Engineering Technology Research Center for Photoelectric Sensing Materials&Devices Guangzhou Key Laboratory of Sensing Materials&DevicesCenter for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China Department of Chemistry and Environment Science Fujian Provincial Key Laboratory of Modern Analytical Science and Separation TechnologyMinnan Normal UniversityZhangzhou 363000China

Electrosynthesis of hydrogen peroxide(H2O2)is an on-site method that enables independent distribution applications in many fields due to its small-scale and sustainable *** crucial point remains developing highly active,selective and cost-effective *** electrosynthesis of H2O2 in acidic media is more practical owing to its stability and no need for further *** herein report a phosphorus and selenium tuning Co-based non-precious catalyst(CoPSe)toward two-electron oxygen reduction reaction(2e–ORR)to produce H2O2 in acidic *** starting point of using both P and Se is finding a balance between strong ORR activity of CoSe and weak activity of *** results demonstrated that the CoPSe catalyst exhibited the optimized 2e–ORR activity compared with CoP and *** disclosed an onset potential of 0.68 V and the H2O2 selectivity 76%-85%in a wide potential range(0–0.5 V).Notably,the CoPSe catalyst overcomes a significant challenge of a narrow-range selectivity for transitionmetal based 2e–ORR ***,combining with electro-Fenton reaction,an on-site system was constructed for efficient degradation of organic *** work provides a promising non-precious Co-based electrocatalyst for the electrosynthesis of H2O2 in acidic media.

关键词： Oxygen reduction reaction Electrochemical H2O2 production Electrocatalysis Non-precious electrocatalyst Acidic media

Dual-enhancement of chromaticity and thermal stability:In-situ synthesis of core-shell γ-Ce_(2)S_(3) @CePO_(4) configuration

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Journal of Rare Earths 2022年第5期40卷 800-806,I0005页

作者： kanglong Hui Wei Dong Jipeng Fu Mingxue Tang Qi Wei Chengyu Li Hongjie Zhang Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022China Center for High Pressure Science and Technology Advanced Research Beijing 100094China Institute of Optoelectronic Materials and Devices China Jiliang UniversityHangzhou 310018China College of Materials Science and Engineering BeijingUniversity of TechnologyBeijing 100124China

Non-toxic rare earth(RE) composite materials are promising and active in optoelectronic fields,such as *** this work,Na ions doped γ-Ce_(2) S_(3) pigments were synthesized by solid-phase vulcanization and followed by in-situ synthesis to prepare an outer layer of CePO_(4) *** characterizations of X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),solid state nuclear magnetic resonance(NMR) indicate that Na-dopedγ-Ce_(2) S_(3) and CePO_(4) uniformly and tightly coated core-shell structure was successfully *** thermogravimetric analysis(TG) and reflection spectrum(RS) reveal that the CePO_(4) coating significantly improves the colorant and thermal stability performance of γ-Ce_(2) S_(3) .The excellent color quality of γ-Ce_(2) S_(3) @CePO_(4)(L*=45.16,a*=55.94.b*=44.53) is achieved and the red color(L*=43.82,a*=49.79,b*=38.04) is still retained even if the sample is heated in air at 400℃ for 30 min.

关键词： γ-Ce_(2)S_(3) Red pigment Core-shell structure CePO_(4)coating Rare earths

Preparation of polydopamine based redox-sensitive magnetic nanoparticles for doxorubicin delivery and MRI detection

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Journal of Bioresources and Bioproducts 2017年第2期2卷 67-72页

作者： Le Shang Qiuyue wang kanglong Chen Jing Qu Jian-bin Luo Qing-han Zhou College of Chemical and Environment Protection Southwest University for NationalitiesFirst Ring Road4th Section No.16ChengduSichuan 610041China.

To improve the water-dispersity of superparamagnetic iron oxide nanoparticles(SPIONs),a novel polydopamine based redox-sensitive copolymer modified SPIONs were prepared for the biomedical application to deliver doxorubicin(DOX)and magnetic resonance imaging(MRI)*** major components of this nanoparticle include SPIONs and the redox-sensitive polydopamine(rPDA)crosslinked copolymer,where N,N-Bis(acryloyl)cystamine served as cross-linker,dopamine methacrylamide and a long-chain polyethylene glyco methyl ether methacrylate acted as *** the rPDA@SPIONs were formed by the ligand exchange reaction of dopamine moiety with the oleic acid layer capped on the surface of SPIONs,and the inner area of the nanoparticles formed a reservoir for DOX,while the hydrophilic PEG moiety helped the nanoparticles well-dispersible in aqueous *** DOX-loaded rPDA@SPIONs demonstrated a high drug loading efficiency of 857μg DOX per mg iron,and a strong T2 relaxivity of 123 mM-1•S^(-1)for *** drug release analysis of drug-loaded nanoparticles showed a sustained and high cumulative drug release in GSH up to 73%within 48 h,rather than the relatively low release rate of 37%in PBS(pH 7.4)without *** the results showed that the designed magnetic nanoparticle may be a promising vehicle for anticancer drug delivery with stimuli-triggered drug release behavior,and also a foundation for building smart theranostic formulations for efficient detection through MRI.

关键词： SPIONs redox-sensitive DOX delivery MRI detection

Yolk-shell nanoarchitecture for stabilizing a Ce_(2)S_(3)anode

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Carbon Energy 2021年第5期3卷 709-720页

作者： kanglong Hui Jipeng Fu Jie Liu Yongjin Chen Xiang Gao Tian Gao Qi Wei Chengyu Li Hongjie Zhang Mingxue Tang Center for High Pressure Science and Technology Advanced Research BeijingChina Department of Physics Shanghai University of Electric PowerShanghaiChina Institute of Optoelectronic Materials and Devices China Jiliang UniversityHangzhouChina College of Materials Science and Engineering Beijing University of TechnologyBeijingChina Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchunChina

Rare-earth sulfides are of research interest for lithium-ion batteries(LIBs)due to their abundant lithium intercalation sites and low redox ***,their electrochemical performances are not satisfactory because of poor conductivity and volume change upon electrochemical ***,nanoarchitectures ofγ-Ce_(2)S_(3)encapsulated in a hollow mesoporous carbon nanosphere(Ce_(2)S_(3)@HMCS)are fabricated using the self-template strategy combined with the in-sphere sulfuration method and tested as an LIB *** void space between the Ce_(2)S_(3)core and the outer layer of the carbon nanosphere has been properly designed and modulated to achieve excellent electrochemical performance in terms of electronic conductivity,reversibility,and rate *** reversible capacity of Ce_(2)S_(3)@HMCS is 2.6 times that of the pure Ce_(2)S_(3)anode,which can gradually increase and maintain a capacity of 282 mAh·g^(−1)at a current density of 1 A·g^(-1),and a high Coulombic efficiency(~100%)can be achieved even after 1000 *** good performance is attributed to the unique yolk-shell nanostructure with a highly crystallized and stable Ce3S2 core and volume expansion buffer space upon lithiation/*** situ X-ray diffraction and nuclear magnetic resonance results indicate that the lithiation of Ce_(2)S_(3)@HMCS is an intercalation *** study represents an important advancement in precise structural design with in-sphere sulfuration and sheds light on a potential direction for highperformance lithium storage.

关键词： Ce_(2)S_(3)anode intercalation mechanism lithium ion batteries structure stabilizing yolk-shell nanoarchitecture

论侗族民间生态智慧对维护区域生态安全的价值

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广西民族研究 2008年第4期 88-93页

作者：罗康隆王秀吉首大学人类学与民族学研究所湖南省民族学研究基地

今天生息在黔桂湘毗邻地区的侗族居民和汉族居民一样,都是以固定农田的水稻种植为生。然而,由于侗族所经历的历史过程与汉族迥然不同,所处生态环境也与汉族地区相去甚远,从而在侗族传统文化中形成了自己独特的生存理念,并衍生出具有侗... 详细信息

今天生息在黔桂湘毗邻地区的侗族居民和汉族居民一样,都是以固定农田的水稻种植为生。然而,由于侗族所经历的历史过程与汉族迥然不同,所处生态环境也与汉族地区相去甚远,从而在侗族传统文化中形成了自己独特的生存理念,并衍生出具有侗族特色的生态适应方式和举措。经过长期的磨合,侗族传统文化已经有效地实现了与所处生态环境的和谐共存,有效地维护了区域生态安全。

关键词：侗族生态智慧生态安全文化-生态

像素有效形状对微扫描红外超分辨成像的影响(英文)

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红外与激光工程 2015年第1期44卷 48-52页

作者：孙鸣捷于康龙北京航空航天大学仪器科学与光电工程学院北京100091

超分辨成像是基于过采样来降低频率混叠、提高图像分辨率的技术,而像素有效形状是超分辨相关研究的重要对象。基于实际的红外焦平面阵型提出了"Z"形有效形状模型,并分析了常用的方形模型和"Z"形模型分别得到调制传递函数(MTF)的差别。... 详细信息

超分辨成像是基于过采样来降低频率混叠、提高图像分辨率的技术,而像素有效形状是超分辨相关研究的重要对象。基于实际的红外焦平面阵型提出了"Z"形有效形状模型,并分析了常用的方形模型和"Z"形模型分别得到调制传递函数(MTF)的差别。还提出了形状边界到中心点的差值越小,其得到的MTF越大的假设,通过对不同形状模型的MTF推导分析和数值模拟,其结果证实了这一假设。数值模拟结果还表明圆形模型具有最大的MTF值。上述结论对未来的红外焦平面阵型设计与生产具有参考意义。

关键词：微扫描红外超分辨成像像素有效形状