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| 1 | Propagation law of shock waves and gas flow in cross roadway caused by coal and gas outburst显示文摘In order to study the propagation law of shock waves and gas flow during coal and gas outburst,we analyzed the formation process of outburst shock waves and gas flow and established the numerical simulation models of the roadways with 45°intersection and 135°intersection to simulate the propagation of outburst gas flow and the process of gas transport.Based on the analysis of the simulation results,we obtained the qualitative and quantitative conclusions on the characteristics and patterns of propagation and attenuation of outburst shock waves and gas flow.With the experimental models,we investigated the outburst shock waves and gas flow in the roadways with the similar structures to the simulated ones.According to the simulation results,when the angle between the driving roadway and the adjacent roadway increased,the sudden pressure variation range in adjacent roadway and the influencing scope of gas flow increased and the sudden pressure variation duration decreased.The intersection between the driving roadway and the adjacent roadway has no effect on airflow reversal induced by the shock waves and gas flow. | Zhou Aitao Wang Kai Wu Zeqi | 2014 | International Journal of Mining Science and Technology2014，24，1： | 17 |
| 2 | CoP nanoparticles embedded in P and N co-doped carbon as efficient bifunctional electrocatalyst for water splitting显示文摘Noble-metal-free hydrogen/oxygen evolution reaction(HER/OER) electrocatalysts, especially bifunctional electrocatalysts, are essential for overall water splitting, but their performance is impeded by many factors like poor electrical conductivity. Herein, we fabricated cobalt phosphide(Co P) nanoparticles embedded in P and N co-doped carbon(PNC) matrix(Co P@PNC) to fully realize the high activity of Co P by maximizing its conductivity. Simply a carbonization coupled phosphidation approach was utilized where Co ions and organic ligands of Co-MOF were transferred into Co P and P and N co-doped carbon. The synthesized material shows an ideal electrical conductivity, excellent HER(overpotential of-84 m V and-120 m V @10 m A cm^(-2) in acidic and alkaline medias, respectively) and OER(overpotential of 330 m V@10 m A cm^(-2) in alkaline media) performances. Further, Co P@PNC acts as a superior catalyst for both anode and cathode to catalyze overall water splitting and only requires an voltage of 1.52 V to deliver a current density of 10 m A cm^(-2), superior to the noble-metal catalysts system(Pt/C//IrO_2) and the reported noble-metal-free bifunctional electrocatalysts. | Zeqi Zhou Nasir Mahmood Yongchao Zhang Lun Pan Li Wang Xiangwen Zhang Ji-Jun Zou | 2017 | Journal of Energy Chemistry2017，26，6： | 4 |
| 3 | Propagation law of shock waves and gas flow in cross roadway caused by coal and gas outburst显示文摘 | Aitao Zhou Kai Wang Zeqi Wu | 2013 | International Journal of Mining Science and Technology2013，，： | 1 |
| 4 | Research onairflow catastrophic of side branches induced by gaspressure in upward ventilation显示文摘 | ZHOU AITAO WANG KAI WU ZEQI | 2014 | Progress in Mine SafetyScience and Engineering2014，，： | 1 |
| 5 | Miscibility of light oil and flue gas under thermal action显示文摘The miscibility of flue gas and different types of light oils is investigated through slender-tube miscible displacement experiment at high temperature and high pressure.Under the conditions of high temperature and high pressure,the miscible displacement of flue gas and light oil is possible.At the same temperature,there is a linear relationship between oil displacement efficiency and pressure.At the same pressure,the oil displacement efficiency increases gently and then rapidly to more than 90% to achieve miscible displacement with the increase of temperature.The rapid increase of oil displacement efficiency is closely related to the process that the light components of oil transit in phase state due to distillation with the rise of temperature.Moreover,at the same pressure,the lighter the oil,the lower the minimum miscibility temperature between flue gas and oil,which allows easier miscibility and ultimately better performance of thermal miscible flooding by air injection.The miscibility between flue gas and light oil at high temperature and high pressure is more typically characterized by phase transition at high temperature in supercritical state,and it is different from the contact extraction miscibility of CO_(2) under conventional high pressure conditions. | XI Changfeng WANG Bojun ZHAO Fang HUA Daode QI Zongyao LIU Tong ZHAO Zeqi TANG Junshi ZHOU You WANG Hongzhuang | 2024 | Petroleum Exploration and Development2024，51，1： | 0 |
| 6 | Polarized imaging dynamic light scattering for simultaneous measurement of nanoparticle size and morphology显示文摘The performance of nanoparticles is often affected by particle size and morphology.Currently,electron microscopy or atomic force microscopy is typically utilized to determine the size and morphology of nanoparticles.However,there are issues such as difficult sample preparation,long processing times,and challenges in quantitative characterization.Therefore,it is of great significance to develop a fast,accu-rate,and statistical method to measure the size and morphology of nanoparticles.In this study,a new method,called polarized imaging dynamic light scattering(PIDLS),is proposed.The nanoparticles are irradiated with a vertical linearly polarized laser beam,and a polarization camera collected the dynamic light scattering images of particles at four different polarization directions(0°,45°,90°,and 135°)at a scattering angle of 90°.The average particle size and distribution are obtained using the imaging dy-namic light scattering method at 0°polarization direction,and the morphology of the particles is ob-tained based on the depolarization patterns of the scattered light.The optical sphericityΦis defined based on the degree of linear polarization(DoLP).It is also implemented for the quantitative evaluation of the sphericity of the nanoparticles,including spherical,octahedral,nanoplate,nanorod,and linear ones.Together with the Poincarésphere parameterψ,the morphology of the nanoparticles can be roughly identified.In addition,PIDLS enables the measurement of particle size and morphology distributions simultaneously for evaluating the uniformity of particles.The effectiveness of PIDLS is verified by the measurement of five kinds of industrial titanium dioxide as well. | Bingyao Wang Tianyi Cai Xiaoshu Cai Wu Zhou Zeqi Liu | 2024 | Particuology2024，85，2： | 0 |
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