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Chemical Research in Chinese Universities 2016年第1期32卷 82-89页

作者： li xinping li Jianling YAN Gang ZHU Zhixun KANG Feiyu State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 P. R. China Lab of Advanced Materials Department of Materials Science and Engineering Tsinghua University Beijing 100084 P R. China

Hollow tube-like activated carbon（HTAC） was fabricated by a simple and efficient carbonization method with cotton as carbon precursor activated by KOH without any template. The activation time from 0 to 90 min showed no significant effect on the micro-morphology, but greatly influenced the specific surface area and electro- chemical performance. In the end, it was found that the sample activated for 60 min（HTAC-60） has a higher specific surface area of 2600 m2/g, a larger pore volume of 1.52 cm3/g and a greater specific capacitance of 483 F/g at a current density of 0.2 A/g in 1 mol/L H2SO4. Moreover, the sample HTAC-60 shows excellent cycle stability（only 12.2% loss after 5000 cycles） and a high energy density of 67.1 or 37.2 ***-1 at a power density of 200 or 1000 W/kg, respectively, operated in a voltage range of 0--1.0 V in 1 mol/L H2SO4. The results indicate that cotton can potentially be used as a raw material for producing low cost and high performance activated carbon electrode materials for electric double layer capacitor.

关键词： Cotton Hollow tube-like Activated carbon Electric double layer capacitor

Experimental investigation on dynamic mechanical properties of sandy clay treated with alkali-activated metakaolin cement and discrete polypropylene fibers

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Underground Space 2022年第6期7卷 1036-1055页

作者： Ruiqiu Ma Mingyang Wang xinping li Tingting liu School of Civil Engineering and Architecture Wuhan University of TechnologyWuhanHubei 430070China Key Laboratory of Roadway Bridge&Structure Engineering Wuhan University of TechnologyWuhanHubei 430070China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjingJiangsu 210094China State Key Laboratory for Disaster Prevention&Mitigation of Explosion&Impact Army Engineering University of PLANanjingJiangsu 210007China

The dynamic mechanical properties and dynamic energy absorption capacity of marine sandy clay,which was stabilized by cement with partial substitution of alkali-activated metakaolin(AAMK)and discrete polypropylene fibers,were experimentally investigated at strain rates of 80-280 s^(-1).The AAMK,as partial replacement of cement,is eco-friendly and economical,and polypropylene fibers with corrosion resistance can withstand severe environmental *** mechanical properties of 16 different mix ratios were experimentally examined via split Hopkinson compression pressure bar(SHPB)*** macroscopic post-impact fragment patterns Ⅰ and Ⅱ were observed in dynamic stress-strain curves and macroscopic *** results confirmed an obvious enhancement in the dynamic compressive strength and energy absorption density due to the use of cement with partial substitution of AAMK and the addition of polypropylene fibers and *** on scanning electron microscopy(SEM)tests and nuclear magnetic resonance(NMR)tests,cemented sandy clay specimens treated with 0.2%fiber contents or higher exhibited a denser network of soil particles with hydration *** connection mechanism and typical interface between fiber-sand-hydrate-sandy clay particles were observed via SEM ***,an optimal mix ratio was proposed to satisfy the demands of high dynamic mechanical properties,energy absorption capacity,and economic and environmental *** optimal mix ratio corresponded to 0.2% fiber content or higher and sand content of up to 16%.Additionally,it was observed that the dynamic compressive strength of samples with 0.1% fibers or less *** on absorption energy density and failure modes analysis,the fiber content should be higher than or equal to 0.2% to effectively reduce the degree of fragmentation and increase the size of fragments.

关键词： Cemented sandy clay Split Hopkinson pressure bar Dynamic compressive strength Energy absorption Microstructure NMR

Bimetallic Ni-Mo nitride@C_(3)N_(4) for highly active and stable water catalysis

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Frontiers of Materials Science 2022年第3期16卷 181-191页

作者： xinping li Min ZHOU Zhuoxun YIN Xinzhi MA Yang ZHOU College of Chemistry and Chemical Engineering Qiqihar UniversityQiqihar 161006China School of Physics and Electronic Engineering Harbin Normal UniversityHarbin 150025China College of Science Qiqihar UniversityQiqihar 161006China

Non-noble metal electrocatalysts for water cracking have excellent pro-spects for development of sustainable and clean *** efficient electrocatalysts for the oxygen evolution reaction(OER)are very important for various energy storage and conversion systems such as water splitting devices and metal-air *** study prepared a NiMo4@C_(3)N_(4) catalyst for OER and hydrogen evolution reaction(HER)by simple *** catalyst exhibited an excellent OER activity based on the response at a suitable *** drive a current density of 10 mA-cm^(-2) for OER and HER,the overpotentials required for NiMo4@C_(3)N_(4)-800(prepared at 800℃)were 259 and 118 mV,respectively.A two-electrode system using NiMo4@C_(3)N_(4)-800 needed a very low cell potential of 1.572 V to reach a current density of 10 mA-cm^(-2).In addition,this catalyst showed excellent durability after long-term *** was seen to have good catalytic activity and broad application prospects.

关键词： stability oxygen reduction reaction watersplitting electrocatalyst

Lanthanum:A novel inducer for enhancement of fungal laccase production by Shiraia bambusicola

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Journal of Rare Earths 2022年第3期40卷 508-516,I0006页

作者： Yue Wang Xiang Zhang Cansong Lu xinping li Jianqin Zhou Jianwen Wang College of Pharmaceutical Sciences Soochow UniversitySuzhou 215123China

Fungal laccases are industrially important inducible enzymes extensively used in the delignification of lignocellulosics,detoxification of environmental wastes and decolorization of textile *** discovery of new inducers is crucial for laccase productivity by filamentous *** this study,a novel laccase-producing strain S8 from a bambusicolous fungus Shiraia bambusicola was identified by using 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate)as laccase secretion indicator and native polyacrylamide gel *** corresponding full-length cDNA of laccase was cloned and *** effect of lanthanum(LaCl_(3))on extracellular laccase activity was tested at the concentration from 0.2 to 2.0 g/L and at different addition time(day 1-4)in the mycelium *** the presence of 1.0 g/L La^(3+) at the beginning of the mycelium cultures,the highest laccase activity(2.7×10^(4) U/L)is reached after 10 days of cultivation,about tenfold higher compared with non-induced ***^(3+) is shown to be a very strong inducer for fungal laccase activity with no inhibitory effect on fungal growth at the optimized *** vivo,La^(3+) added to the mycelium culture not only promotes a continuous and high expression of laccase gene(lcc1),but also induces a rapid generation of signaling molecules including reactive oxygen species(ROS)and nitric oxygen(NO).Both the NO donor sodium nitroprusside(SNP)and exogenous hydrogen peroxide(H_(2)O_(2))potentiate La^(3+)-induced laccase activity and increase membrane permeability of hyphal ***,the scavengers such as 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide(cPTIO)for NO and vitamin C for ROS suppress the *** results suggest that these signals can mediate La^(3+)-induced laccase biosynthesis and its *** study provides a basis for understanding the induction mechanism of La^(3+) on laccase and a practical strategy for enhanced fungal laccase production.

关键词： Lanthanum Laccase Shiraia bambusicola Reactive oxygen species Nitric oxide Inducer

Influence of the spatial distribution of underground tunnel group on its blasting vibration response

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Underground Space 2023年第3期10卷 248-268页

作者： Mingnan Xu xinping li Kun Xu Tingting liu Yi Zhang Ting Yang School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China Wuhan Huike Quality Testing Co.LTD Wuhan 430050China

The spatial distribution of underground tunnels is significant to the stress redistribution in the surrounding rock masses and blast wave *** field blasting tests were first carried out to study the propagation of blast-induced seismic waves through under-ground tunnels of the Xiluodu Hydropower Station in *** results show that the peak horizontal particle vibration velocity can be used as a safety criterion for underground *** effects of in situ stresses and spatial distributions of the tunnel group on the vibra-tion velocities distribution is afterward investigated by numerical *** results show that there is a significant amplification of the blasting vibrations in the adjacent tunnels,which depends on their vertical positions during the excavation of a *** peak vibration velocity decreases as the lateral separation between tunnels *** the separation between the tunnels exceeds the width of three tunnels,the impact of the blast waves on each part of the adjacent tunnel tends to be stable on the *** terms of the size of the tunnel,the blasting vibration velocity in the upper part of the straight wall on the front-blast side increases as the width increases(and then levels off),while the blasting vibration velocity in the lower part decreases as the width increases(and then levels off).Finally,a generalized formula of blasting vibration velocity considering the spatial distribution is established,which can well predict the vibration velocity of particles in underground tunnels.

关键词： Underground tunnel group Blasting seismic wave Blasting vibration response Spatial distribution

High-performance SSZ-13 membranes prepared using ball-milled nanosized seeds for carbon dioxide and nitrogen separations from methane

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Chinese Journal of Chemical Engineering 2020年第5期28卷 1285-1292页

作者： xinping li Yaowei Wang Tangyin Wu Shichao Song Bin Wang Shenglai Zhong Rongfei Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Shandong Chambroad Petrochemicals Co. LtdBinzhou 256500ShandongChina

SSZ-13 membranes with high separation performances were prepared using ball-milled nanosized seeds by once hydrothermal *** performances of SSZ-13 membranes in CO2/CH4 and N2/CH4 mixtures were enhanced after synthesis ***-gas permeances of CO2,N2 and CH4 and ideal selectivities were recorded through SSZ-13 *** effects of temperature,pressure,feed flow rate and humidity on separation performance of the membranes were *** membranes prepared after synthesis modifications had an average CO2 permeance of 1.16×10-6 mol·(m2·s·Pa)-1(equal to 3554 GPU)with an average CO2/CH4 selectivity of 213 in a 50 vol%/50 vol%CO2/CH4 *** suggests that membrane synthesis has a good *** membrane also displayed a N2 permeance of 1.07×10-7 mol·(m2·s·Pa)-1(equal to 320 GPU)with a N2/CH4 selectivity of 13 for a 50 vol%/50 vol%N2/CH4 ***-13 membrane displayed stable and good separation performance in the wet CO2/CH4 mixture for a long test period over 100 h at 348 *** current SSZ-13 membranes show great potentials for the simultaneous removals of CO2 and N2 in natural gas purification as a facile process suitable for industrial application.

关键词： Carbon/methane separation Nitrogen/methane separation CHA membrane Natural gas purification

Three‑dimensional numerical simulation of dynamic strength and failure mode of a rock mass with cross joints

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International Journal of Coal Science & Technology 2024年第2期11卷 35-52页

作者： Tingting liu Wenxu Huang Chang Xiang Qian Dong xinping li Chao Zhang Hubei Key Laboratory of Blasting Engineering Jianghan UniversityWuhan 430056China School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China Hainan Institute Wuhan University of TechnologySanya 572025China

To study the dynamic mechanical properties and failure characteristics of intersecting jointed rock masses with different joint distributions under confining pressure,considering the cross angleαand joint persistence ratioη,a numerical model of the biaxial Hopkinson bar test system was established using the finite element method–discrete-element model coupling *** validity of the model was verified by comparing and analyzing it in conjunction with laboratory test ***-static combined impact tests were conducted on specimens under various conditions to investigate the strength characteristics and patterns of crack initiation and *** study revealed the predominant factors influencing intersecting joints with different angles and penetrations under impact *** results show that the peak stress of the specimens decreases first and then increases with the increase of the cross ***α<60°,regardless of the value ofη,the dynamic stress of the specimens is controlled by the main ***α≥60°,the peak stress borne by the specimens decreases with increasingη.Whenα<60°,the initiation and propagation of cracks in the cross-jointed specimens are mainly controlled by the main joint,and the final failure surface of the specimens is composed of the main joint and wing ***α≥60°orη≥0.67,the secondary joint guides the expansion of the wing cracks,and multiple failure surfaces composed of main and secondary joints,wing cracks,and co-planar cracks are *** lateral confinement significantly increases the dynamic peak stress able to be borne by the *** triaxial conditions,the degree of failure of the intersecting jointed specimens is much lower than that under uniaxial and biaxial conditions.

关键词： Cross joints Joint distribution form Dynamic failure characteristics FEM–DEM BHPB

Reinforcing a Dangerous Rock Mass Using the Flexible Network Method

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Journal of China University of Geosciences 2005年第4期16卷 354-358页

作者： Yang Wendong Xie Quanmin Xia Yuanyou li xinping Institute of Civil Engineering ＆ Architecture Wuhan University of Technology Wuhan 430070 China

Because the main failure type of a dangerous rock mass is collapse, the treatment of such a mass should focus on controlling collapse failure. When treating dangerous rock masses, disturbing the mass （e. g. by blasting） needs to be avoided, as this new damage could cause collapse. So the self-bearing capacity of the mountain mass must be used to treat the dangerous rock mass. This article is based on a practical example of the control of a dangerous rock mass at Banyan Mountain, Huangshi, Hubei Province. On the basis of an analysis of damage mechanism and the stability of the dangerous rock mass, a flexible network reinforcement method was designed to prevent the collapse of the rock mass. The deformations of section Ⅱ w of the dangerous rock mass before and after the flexible network reinforcement were calculated using the two-dimensional finite element method. The results show that the maximum deformation reduced by 55 % after the application of the flexible network reinforcement, from 45.99 to 20.75 ram, which demonstrates that the flexible network method is effective, and can provide some scientific basis for the treatment of dangerous rock masses.

关键词： dangerous rock mass flexible network reinforcement method finite element analysis.

Fe-doped NiCo_(2)O_(4)hollow hierarchical sphere as an efficient electrocatalyst for oxygen evolution reaction

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Frontiers of Materials Science 2021年第4期15卷 577-588页

作者： Wenqing ZHENG Han SUN xinping li Shu ZHANG Zhuoxun YIN Wei CHEN Yang ZHOU College of Chemistry and Chemical Engineering Qiqihar UniversityQiqihar 161006China Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals Qiqihar 161006China College of Science Qiqihar UniversityQiqihar 161006China

We prepared porous Fe-doped nickel cobaltate(Fe-NiCo_(2)O_(4))hollow hierarchical nanospheres through a facile self-templated synthetic *** to the porous hollow structure and composition,the Fe-NiCo_(2)O_(4)presented vastly superior electrocatalytic activity for the oxygen evolution reaction(OER),compared with NiCo_(2)O_(4)and the majority of other OER *** an aim of stimulating a current density of 10 mA$cm-2,the Fe-NiCo_(2)O_(4)catalyst needs an overpotential of 210 mV,which is on a par with the general properties of commercial *** addition,the Fe-NiCo_(2)O_(4)catalyst performed stably in long-term *** excellent activity and long-term stability showed that such catalysts have great promise for widespread application in the field of water splitting.

关键词： ion exchange hierarchical nanostructure electronic structure transfer oxygen evolution reaction water splitting

Solitary,periodic,kink wave solutions of a perturbed high-order nonlinear Schrödinger equation via bifurcation theory

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Propulsion and Power Research 2024年第3期13卷 433-444页

作者： Qiancheng Ouyang Zaiyun Zhang Qiong Wang Wenjing ling Pengcheng Zou xinping li School of Mathematics Hunan Institute of Science and TechnologyYueyangHunan 414006China School of Mathematics and Computational Science Hunan University of Science and TechnologyXiangtanHunan 411201China

In this paper,by using the bifurcation theory for dynamical system,we construct traveling wave solutions of a high-order nonlinear Schrödinger equation with a quintic ***,based on wave variables,the equation is transformed into an ordinary differential ***,under the parameter conditions,we obtain the Hamiltonian system and phase ***,traveling wave solutions which contains solitary,periodic and kink wave so-lutions are constructed by integrating along the homoclinic or heteroclinic *** addition,by choosing appropriate values to parameters,different types of structures of solutions can be displayed ***,the computational work and it’sfigures show that this tech-nique is influential and efficient.

关键词： Traveling wave solution High-order nonlinear Schrödinger equation Bifurcation theory Dynamical system Hamiltonian system