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An Iron-Based High-Entropy Alloy with Highly Efficient Degradation for p-Nitrophenol

Acta Metallurgica Sinica(English Letters) 2022年第10期35卷 1653-1664页

作者： Shenghui Xie Xiang Liao xierong zeng Haipeng Yang Liang He Research Center for Interfacial Engineering of Functional Materials Engineering Laboratory for Advanced Technology of Ceramic and Shenzhen Key Laboratory of Special Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen518060China CCL Manufacturing(Shenzhen)Limited Shenzhen518104China

High-entropy alloys(HEAs)have attracted widespread attention due to their excellent mechanical ***,their functional properties arising from the supersaturated solid solution state can be *** oxidation processes(AOPs)are considered to be an effective method for decomposing organic pollutants,and HEAs are proposed as effective candidates for AOP ***,several HEAs used for organic pollutant degradation are prepared through mechanical *** this work,FeAlCoNi and FeAlCoNiB Fenton-like catalysts were prepared by single roll melt spinning and subsequent ball milling *** found that the FeAlCoNiB HEA exhibits highly efficient degradation for p-nitrophenol(p-NP).The degradation efficiency of FeAlCoNiB is 120 times higher than that of FeAlCoNi,which confirms that boron functions effectively during the degradation *** has a better degradation efficiency than pure iron powder and a degradation efficiency comparable to that of the amorphous Fe_(78)Si_(11)B_(11) ***,the degradation efficiency of FeAlCoNiB_(X) increases(k values from 0.13 to 0.55 min^(−1))when the boron content increases from an X value of 0.25 to *** speculate that Fe_(2)B favors the degradation process and promotes zero-valent iron to decompose organic pollutants through a galvanic cell *** p-NP degradation pathways are proposed after LC–MS *** study provides a new series of HEA Fenton-like catalysts,which have the potential to be prepared into bulk devices for industrial applications.

关键词： High-entropy alloys(HEAs) Advanced oxidation processes(AOPs) Galvanic cell effect Degradation Organic pollutants

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Microwave-assisted synthesis of Cr_(3)C_(2)@C core shell structure anchored on hierarchical porous carbon foam for enhanced polysulfide adsorption in Li-S batteries

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Nano Research 2021年第7期14卷 2345-2352页

作者： xierong zeng Jianxin Tu Shuangshuang Chen Shaozhong zeng Qi Zhang Jizhao Zou Kezhi Li Shenzhen Key Laboratory of Special Functional Materials&Shenzhen Engineering Laboratory for Advance Technology of ceramics College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China State Key Laboratory of Solidification Processing Carbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Anhui University of TechnologyMa'anshan 243002China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China BCMaterials Basque Center for MaterialsApplications and NanostructuresUPV/EHU Science Park48940 LeioaSpainIKERBASQUEBasque Foundation for Science48013 BilbaoSpain

In this paper,we use microwave reduction strategy to synthesize a new bi-functional sulfur host material at the service of cathode substrate for lithium-sulfur batteries(LSBs),the composite is made of hierarchical porous carbon foam supported carbon-encapsulated chromium carbide nano-particles(Cr_(3)C_(2)@C/HPCF),in which the well-distributed conductive Cr_(3)C_(2) nano-particles can act as powerful chemical adsorbent and are effective in restraining the shuttle effect of lithium polysulfides(LiPSs).Test results show that the Cr_(3)C_(2)@C/HPCF based sulfur electrodes with 75 wt.%of sulfur exhibit a high initial discharging capacity of 1,321.1 mAh·g^(−1) at 0.1 C(3.5 mg·cm^(−2)),and a reversible capacity can still maintain stability at 1,002.1 mAh·g^(−1) after 150 *** increasing the areal sulfur loading to 4 mg·cm^(−2),the electrodes can still deliver an initial discharging capacity of 948.0 mAh·g^(−1) at 0.5 C with ultra-slow capacity decay rate of 0.075%per cycle during 500 ***,the adsorption energy between the Cr_(3)C_(2) surface and LiPSs as well as theoretic analysis based on first-principles is also investigated.

关键词： Cr_(3)C_(2)nanoparticles core shell structure chemisorptions microwave reduction hierarchical porous carbon foam Li-S batteries

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Thermal Fatigue Behavior of SiC/MBAS Glass Coated Carbon/Carbon Composites

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稀有金属材料与工程 2009年第A3期38卷 45-49页

作者： Li Long zeng xierong Li Hejun Xiong Xinbo Xie Shenghui Zou Zizhao Shenzhen University Shenzhen 518060 China Shenzhen Key laboratory of Special Functional Materials Shenzhen 518060 China Northwestern Polytechnical University Xi＇an 710072 China

The thermal fatigue behavior of C/C composites coated with the SiC/MBAS glass (MoSi2 particle-containing boron aluminosilicate glass) coating, prepared by the two-step process of the pack cementation and procoating-sintering, was investigated in present paper. The experimental results indicated that the SiC/MBAS glass coating had an excellent thermal shock resistance in air at temperature up to 1873 K. During quick thermal cycle between 1873K and room temperature in air, the decrease of mass and mechanical property of the coated C/C composites was all slight. After thermal cycle for 50 times, the mass loss of the SiC/MBAS glass coated sample was only 0.22%; additionally, the remaining ratio of strength and modulus was no less than 95.2% and 99.4%, respectively. The decrease of the mechanical property during the thermal cycle was primarily due to the damnification of the fiber/matrix interfaces and the oxidation of the coated samples with oxygen.

关键词：热疲劳性能复合材料碳化硅涂层物理性能

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Preparation of Bioactive Calcium Phosphate Coatingon Porous C/C Substrate by a Novel Deposition Technique

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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 486-489页

作者： XIONG Xinbo zeng xierong LI Xiaohua Xie Shenghui ZOU Chunli Shenzhen Key Laboratory of Special Functional Materials Department of Materials Science and Engineering Shenzhen University Shenzhen 518060 China

A novel heat substrate technique, high frequency inductive heat deposition （IHD）, was introduced to coat porous carbon materials, C/C and carbon felt to improve their bioactivity. The morphologies, composition and microstructure of the resulting coatings were examined by scanning electron microscopy （SEM）, energy dispersive spectra （EDS）, X-ray diffractometer （XRD） and Fourier transform infrared spectroscopy （FTIR）. The results show that, the calcium phosphate consisted of non-stoichiometric, CO3-containing and plate- like octacalcium phosphate （Ca8-xH2（PO4）6, OCP） could uniformly cover the entire porous surfaces of carbon materials. Good adhesion of the coating to carbon material substrates was observed.

关键词： carbon bioactive calcium phosphate coating inductive heat deposition

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Synthesis of LiFePO_4 in situ vapor-grown carbon fiber (VGCF) composite cathode material via microwave pyrolysis chemical vapor deposition

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Chinese Science Bulletin 2011年第17期56卷 1832-1835页

作者： DENG Fei zeng xierong ZOU JiZhao HUANG JianFeng SHENG HongChao XIONG XinBo QIAN HaiXia LI XiaoHua School of Materials Science and Engineering Northwestern Polytechnical University Xi' an 710072 China College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China Shenzhen Key Laboratory of Special Functional Materials Shenzhen 518060 China

One of the most important factors that limits the use of LiFePO 4 as cathode material for lithium ion batteries is its low electronic *** order to solve this problem,LiFePO 4 in situ vapor-grown carbon fiber (VGCF) composite cathode material has been prepared in a single step through microwave pyrolysis chemical vapor *** phase,microstructure,and electrochemical performance of the composites were *** with the cathodes without in situ VGCF,the initial discharge capacity of the composite electrode increases from 109 to 144 mA h g-1 at a 0.5-C rate,and the total electric resistance decreases from 538 to *** possible reasons for these effects are proposed.

关键词： LiFePO4 气相生长碳纤维化学气相沉积法复合阴极材料 VGCF 微波热解原位合成

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Structure and Oxidation Behavior of a Plasma Sprayed Yttrium Silicates Coated SiC-C/C with a Glass Outer Sealant from 1573K to 1873K

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Journal of Wuhan University of Technology(Materials Science) 2008年第1期23卷 33-37页

作者：黄剑锋 LI Hejun zeng xierong CAO Liyun LI Kezhi XIONG Xinbo LI Long School of Materials Science and Engineering Shaanxi University of Science and Technology Xi an 710021 China C/C Composites Technology Research Center Northwestern Polytechnical University Xi an 710072 China Department of Materials Science Shenzhen University Shenzhen 518060 China

Different compositions of yttrium silicates coatings were deposited on SiC-C/C by plasma spraying and an outer borosilicate glass was applied on the yttrium silicates coatings surfaces. The structure of the multi-layer coatings was characterized by XRD and SEM analyses. High temperature oxidation behavior of the multi-layer coatings coated C/C composites was investigated. Results show that SiC/2SiO2 Y2O3/1.5SiO2 Y203/ SiO2 Y2O3/glass multi-layer coating has better high temperature oxidation resistance, protecting carbon/ carbon composites from oxidation at 1 773 K in air for 164 h with the weight loss of 1.65%. The oxidation weight loss of the coated C/C with time accorded with parabolic rule in the temperature range 1 573 K-1 873 K; and the corresponding oxidation activation energy of the coated carbon/carbon composites is 132.2 kJ/mol.

关键词： carbon/carbon composites plasma spraying coating oxidation behavior

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Kinetics on Conversion of Chemical liquid Vaporization Deposited Monetite Coating to HA on Carbon/Carbon Composites

Kinetics on Conversion of Chemical liquid Vaporization Depos...

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2014中国功能材料科技与产业高层论坛

作者： Xiong Xinbo Tu Jianxin zeng xierong Ma Jun Shen Zhen Key Laboratory of Special Functional Materials Department of Materials Science and EngineeringShen Zhen University

A monetite coating was deposited on Carbon/Carbon composites（C/C）by a chemical liquid vaporization deposition（CLVD）method,and then hy-drothermally conversed to a hydroxyapatite（HA）*** kinetics onthe transformation of the monetite to HA under hydrothermal conditions was *** results showed that the conversionrate of the monetiteto HA increased as hydrothermaltime and temperature *** conversion ofthe monetitecoating to HA was controlled by a surface reaction,whose activation energy was calculated to be 25.1kJ/mol.

关键词： Monetite Hydroxyapatite Coating,Carbon/carbon composite Kinetics

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具有良好室温塑性的ZrCuNiAlNb块体非晶

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稀有金属材料与工程 2010年第12期39卷 2127-2131页

作者：谢盛辉曾燮榕胡强符冬菊西北工业大学陕西西安710072 深圳大学深圳市特种功能材料重点实验室广东深圳518060

在脆性的ZrCuNiAl块体合金中添加Nb,获得新型的zr60.59Cu15.78Ni10.73Al10.75Nb2.15非晶合金.通过XRD、DSC及HRTEM对合金的结构及热力学参数进行测定,并采用静态压缩实验研究其力学性能.结果表明:合金在XRD和DSC精度范围内呈现非晶态特... 详细信息

在脆性的ZrCuNiAl块体合金中添加Nb,获得新型的zr60.59Cu15.78Ni10.73Al10.75Nb2.15非晶合金.通过XRD、DSC及HRTEM对合金的结构及热力学参数进行测定,并采用静态压缩实验研究其力学性能.结果表明:合金在XRD和DSC精度范围内呈现非晶态特征,但HRTEM结果显示其析出少量1~2 nm的纳米晶.Nb的添加还显著降低了合金的结晶激活能,有利于形变过程中纳米晶的进一步形核.纳米晶的存在增加了剪切带的形核位置,阻碍和钝化剪切带扩展,并诱发剪切带分又及新剪切带形成,提高了合金的室温塑性.该块体非晶的屈服强度为1850 MPa,平均塑性应变为11.95%,最大塑性应变达到25.37%,最小塑性应变为2.95%,并具有应变硬化现象.

关键词：室温塑性块体非晶 Room Temperature Plastic Bulk Metallic Glass 塑性应变剪切带形成块体合金纳米晶热力学参数 HRTEM 硬化现象形核形变过程实验研究屈服强度力学性能静态压缩结果非晶合金

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二次热压法制备SiC_p/Al复合材料的耐磨性能研究

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特种铸造及有色合金 2007年第3期27卷 172-174页

作者：谢盛辉曾燮榕熊信柏深圳大学材料科学与工程学院深圳市特种功能材料重点实验室

采用快速升温二次热压法制备了（10～30）SiC/Al-0.8Si-1.2Mg-0.4Cu复合材料,并研究其与钢球对磨的摩擦磨损规律.结果表明,二次热压变形法能有效抑制剧烈的界面反应,得到高致密的SiCp/Al复合材料.复合材料的摩擦因数随SiC含量增加而增大... 详细信息

采用快速升温二次热压法制备了（10～30）SiC/Al-0.8Si-1.2Mg-0.4Cu复合材料,并研究其与钢球对磨的摩擦磨损规律.结果表明,二次热压变形法能有效抑制剧烈的界面反应,得到高致密的SiCp/Al复合材料.复合材料的摩擦因数随SiC含量增加而增大,大载荷下增幅更明显.试验条件下,SiC/Al复合材料与GCr15钢的摩擦因数在0.3～0.5之间.复合材料的磨损率开始随载荷增大而增大,载荷超过5 N后,SiC含量小于15%的试样磨损率继续增大,而SiC含量大于20%的试样的磨损率则急剧减少.这是由于高SiC含量试样在大载荷下表层生成的Al2O3增强了摩擦层.在载荷7 N时,30SiC/Al复合材料的磨损率只有1.14×10^-3 mm3/m,说明该复合材料更适宜在大载荷下应用.

关键词： SiCp/Al复合材料二次热压摩擦因数磨损率

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Synthesis of Carbon Nanospheres with Small Diameterby Microwave Pyrolysis of Methane Directly

Synthesis of Carbon Nanospheres with Small Diameterby Microw...

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中国材料大会2012

作者： Dongju Fu xierong zeng Weili zhang Jianjun Chen Dongshuang Li Manlin Tan Research Institute of Tsinghua University in Shenzhen College of Materials Science and Engineering Shenzhen University

ISBN: (纸本)9783037856079

Carbon nanospheres of uniform diameter around 40 nm have been achieved in the absence of catalyst by microwave pyrolysis chemical vapor deposition. The products have been characterized by field emission scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction, Raman spectroscopy and thermogravimetric analysis. The results show that the nanospheres with high purity, which are solid by their cross-sections, consisting of concentric incompletely closed graphitic layers. Their thermal stability in dynamic air atmosphere is also discussed.

关键词： Carbon spheres Chemical vapor deposition Electron microscopy Microstructure

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