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10篇 您的检索式:作者名="REN Hejun"
    题名 作者 年代 出处 被引量
1Vc-Functionalized Fe3O4 Nanocomposites as Peroxidase-like Mimetics for H2O2 and Glucose Sensing显示文摘REN Hejun MA Taigang ZHAO Jian ZHOU Rui 2018Chemical Research in Chinese Universities2018,34,2:3
2Activation of Persulfate by Magnetic MnFe2O4-bentonite for Catalytic Degradation of 2,4-Dichlorophenol in Aqueous Solutions显示文摘ZHAO Yongsheng LI Qin REN Hejun ZHOU Rui 2017Chemical Research in Chinese Universities2017,33,3:2
3Phase transformation in Cu–Cr–Zr–Mg alloy显示文摘Juanhua Su Ping Liu Hejun Li Fengzhang Ren Qiming Dong 2007Materials Letters2007,,27:2
4Hierarchical,seamless,edge-rich nanocarbon hybrid foams for highly efficient electromagnetic-interference shielding显示文摘Lightweight,flexible,ultrahigh-performance electromagnetic-interfe rence(EMI)shielding materials are urgently required in the areas of aircraft/aerospace,portable and wearable electronics.Herein,1 D carbon nanotubes(CNT)and carbon nanofibers(CNF)with 2 D edge-rich graphene(ERG)are used to form a lightweight,flexible CNT-ERG-CNF hybrid foam.This foam was fabricated through a self-sacrificial templating chemical vapor deposition process,where nanocarbons bond through covalent bonding,forming a hierarchical 3 D hybridized carbon nanostructure.Multistage conductive networks and heterogeneous interfaces were constructed using edge-rich nanocarbons to increase the induced currents and interfacial polarization which makes great contributions to achieve high absorption electromagnetic shielding effectiveness(SEA).The CNT-ERG-CNF hybrid foam exhibits EMI shielding effectiveness(SE)exceeding55.4 dB in the X-band while the specific SE(SSE,SE divided by mass density)achieves 9200 dB cm^(3)g^(-1),which surpasses that of nearly all other carbon-based composite materials.Furthermore,the structural stability and durability of the flexible CNT-ERG-CNF hybrid foams is examined by measuring EMI SE after 10000 times cyclic bending.Remarkably,this work not only provides a new idea for preparing hierarchical carbon materials for a wide range of applications,but presents some fundamental insights for achieving higher absorption losses in EMI shielding materials.Liyuan Han Qiang Song Kezhi Li Xuemin Yin Jiajia Sun Hejun Li Fengpei Zhang Xinran Ren Xi Wang 2021Journal of Materials Science & Technology2021,,13:2
5Phase transformation in Cu–Cr–Zr–Mg alloy显示文摘Juanhua Su Ping Liu Hejun Li Fengzhang Ren Qiming Dong 2007Materials Letters2007,,27:1
6Effect of Bonding Temperature on the Microstructures and Strengths of C/C Composite/GH3044 Alloy Joints by Partial Transient Liquid-Phase(PTLP) Bonding with Multiple Interlayers显示文摘With the use of Ti/Ni/Cu/Ni multiple foils as interlayer,carbon/carbon(C/C) composite was bonded to Nibased superalloy GH3044 by partial transient liquid-phase bonding technique.The effect of bonding temperature on the microstructures and strengths of the joints was investigated.The results showed that gradient structural multiple interlayers composed of ‘‘C–Ti reaction layer/Ti–Ni intermetallic compound layer/Ni–Cu sosoloid/residual Cu layer/Ni-GH3044 diffusion layer'' were formed between C/C composite and GH3044.The shear strength of the C/C composite/GH3044 joint reached the highest value of 26.1 MPa when the bonding temperature was 1,030 °C.In addition,the fracture morphology showed that the fracture mode changed with the increase of bonding temperature.Xin Zhang Xiaohong Shi Jie Wang Hejun Li Kezhi Li Yancai Ren 2014Acta Metallurgica Sinica(English Letters)2014,27,4:1
7Phase transformation in Cu-Cr-Zr-Mg alloy 显示文摘SU Juanhua LIU Ping LI Hejun REN Fengzhang DONG Qiming 2007Materials Letters2007,61,:1
8Effect of nickel introduced by electroplating on pyrocarbon deposition of carbon-fiber preforms显示文摘In order to improve the deposition rate and microstructure of pyrocarbon, nickel was introduced by electroplating on carbon fibers and used as a catalyst during the deposition of pyrocarbon at 1000 C using methane as a precursor gas. The distribution of nickel catalyst and the microstructure of pyrocarbon were characterized by scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS), X-ray diffraction(XRD), and Raman micro-spectrometry. Results show that nano-sized nickel particles could be well distributed on carbon fibers and the pyrocarbon deposited catalytically had a smaller d002 value and a higher graphitization degree compared with that without catalyst. In addition, the deposition rate of pyrocarbon in each hour was measured.The deposition rate of pyrocarbon in the first hour was more than 10 times when carbon cloth substrates were doped with nickel catalysts as compared to the pure carbon cloths. The pyrocarbon gained by rapid deposition may include two parts, which are generation directly on the nickel catalyst and formation with the carbon nanofibers as crystal nucleus.Ren Yancai Shi Xiaohong Li Hejun Li Kezhi Zhang Xin 2014Chinese Journal of Aeronautics2014,27,4:0
9Ore genesis of Badi copper deposit, northwest Yunnan Province, China: evidence from geology, fluid inclusions, and sulfur, hydrogen and oxygen isotopes显示文摘The Badi copper deposit is located in Shangjiang town, Shangri-La County, Yunnan Province. Tectonically,it belongs to the Sanjiang Block. Vapor–liquid two-phase fluid inclusions, CO_2-bearing fluid inclusions, and daughter-bearing inclusions were identified in sulfide-rich quartz veins. Microthermometric and Raman spectroscopy studies revealed their types of ore-forming fluids:(1) low-temperature, low-salinity fluid;(2) medium-temperature, low salinity CO_2-bearing; and(3) high-temperature, Fe-rich,high sulfur fugacity. The δ^(18)O values of chalcopyritebearing quartz ranged from 4.96‰ to 5.86‰, with an average of 5.40‰. The δD values of ore-forming fluid in equilibrium with the sulfide-bearing quartz were from-87‰ to-107‰, with an average of-97.86‰. These isotopic features indicate that the ore-forming fluid is a mixing fluid between magmatic fluid and meteoric water.The δ^(34)S values of chalcopyrite ranged from 13.3‰ to15.5‰, with an average of 14.3‰. Sulfur isotope values suggest that the sulfur in the deposit most likely derived from seawater. Various fluid inclusions coexisted in the samples; similar homogenization temperature to different phases suggests that the Badi fluid inclusions might have been captured under a boiling system. Fluid boiling caused by fault activity could be the main reason for the mineral precipitation in the Badi deposit.Hejun Yin Jianguo Huang Tao Ren 2018Acta Geochimica2018,37,4:0
10Garlic Root Biomass as Novel Biosorbents for Malachite Green Removal: Parameter Optimization, Process Kinetics and Toxicity Test显示文摘REN Hejun ZHANG Ruonan WANG Qiaochu PAN Hongyu WANG Yan 2016Chemical Research in Chinese Universities2016,32,4:0
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