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Grinding Characteristic of Multi-walled Carbon Nanotubes-alumina Composite Particle

Journal of Wuhan University of Technology(Materials Science) 2012年第6期27卷 1009-1013页

作者： b munkhbayar Nasan bAYARAA Hafizur REHMAN Junhyo KIM Hanshik CHUNG Hyomin JEONG Department of Energy and Mechanical Engineering Gyeongsang National University Department of Marine Engineering Mokpo National Maritime University Department of Energy and Mechanical Engineering Institute of Marine Industry Gyeongsang National University

The synthesis of new materials containing multi-walled carbon nanotubes （MWCNTs） and the microstructure of alumina particles were investigated and characterized. The MWCNTs and alumina particles were ground under both the dry and wet conditions with various rotation speeds （200 - 400 r/min） in planetary ball milling machine, and their combination characteristics were described. The experimental results were examined by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, transmission electron microscopy （TEM） and particle sizing analysis （PSA）. SEM result revealed that the combination of MWCNTs - Alumina particles mixed quite well under both the dry and wet grinding with rotation speed of 400 r/rain. XRD characterization indicated the better result could get in ground samples at a rotation speed of 400 r/min. PSA result showed the particle size decreased with increase the grinding speeds. From the overall results, we observed that the grinding method can be used to synthesize new material with high efficiency.

关键词： carbon nanotubes alumina microstructure nanoparticle planetary ball mill

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Low-overpotential electrochemical ammonia synthesis using biOCl-modified 2D titanium carbide MXene

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Chinese Chemical Letters 2022年第1期33卷 394-398页

作者： Yu Wang munkhbayar batmunkh Hui Mao Hui Li baohua Jia Shuyao Wu Daliang Liu Ximing Song Ying Sun Tianyi Ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province College of ChemistryLiaoning UniversityInstitute of Clean Energy ChemistryShenyang 110036China Centre for Catalysis and Clean Energy School of Environment and ScienceGriffith UniversityGold CoastQueensland 4222Australia Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia

Electrochemical synthesis of ammonia has the advantages of low energy consumption and promising environmental protection,as compared to the traditional Haber-bosch ***,the commercial utilization of this novel system is limited by the low Faradaic efficiency,poor ammonia yield and high overpotential due to the strong NN bond and the dominant competing reaction of hydrogen evolution reaction(HER).Herein,a biOCl-modified two-dimensional(2D)titanium carbide MXenes nanocomposite(biOCl@Ti_(3)C_(2)T_(x))is proposed as a promising electrocatalyst for ambient nitrogen(N_(2))reduction reaction with excellent catalytic performance and superior long-term stability at low *** 0.1 mol/L HCl,this catalyst attains a high Faradic efficiency of 11.98%and a NH_(3)yield of 4.06μg h^(-1)cm^(-2)at-0.10 V(***),benefiting from its strong interaction of bi 6p band with the N 2p orbitals,combined with its large specific surface area and the facile electron transfer.

关键词： biOCl Ti_(3)C_(2)T_(x) Electrocatalytic Ammonia N2 reduction reaction

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Green and scalable electrochemical routes for cost‐effective mass production of MXenes for supercapacitor electrodes

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Carbon Energy 2023年第10期5卷 13-24页

作者： Zimo Huang Jiadong Qin Yuxuan Zhu Kelin He Hao Chen Hui Ying Hoh munkhbayar batmunkh Tania Mbenedetti Qitao Zhang Chenliang Su Shanqing Zhang Yu Lin Zhong Queensland Micro‐and Nanotechnology Centre School of Environment and ScienceGriffith UniversityQueenslandNathanAustralia Centre for Catalysis and Clean Energy School of Environment and ScienceGriffith UniversityQueenslandGold CoastAustralia International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhenChina

One of the most unique properties of two-dimensional carbides and nitrides of transition metals(MXenes)is their excellent water dispersibility and yet possessing superior electrical conductivity but their industrial-scale application is limited by their costly chemical synthesis *** this work,the niche feature of MXenes was capitalized in the packed-bed electrochemical reactor to produce MXenes at an unprecedented reaction rate and yield with minimal chemical waste.A simple NH4F solution was employed as the green electrolyte,which could be used repeatedly without any loss in its ***,both fluoride and ammonium were found to play critical roles in the electrochemical etching,functionalization,and expansion of the layered parent materials(MAXs)through which the liberation of ammonia gas was *** electrochemically produced MXenes with excellent conductivity,applied as supercapacitor electrodes,could deliver an ultrahigh volumetric capacity(1408 F cm^(−3))and a volumetric energy density(75.8 Wh L^(−1)).This revolutionary green,energy-efficient,and scalable electrochemical route will not only pave the way for industrial-scale production of MXenes but also open up a myriad of versatile electrochemical modifications for improved functional MXenes.

关键词： packed‐bed electrochemical reactor electrochemical etching MXene supercapacitor

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