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A kinetic model of Ti(IV)-catalyzed H_2O_2/O_3 process in aqueous solution

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Journal of Environmental Sciences 2011年第12期23卷 2087-2092页

作者： Shaoping Tong Shuqin Zhao xiaofei lan Chunan Ma College of Chemical Engineering and Materials Science State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technology Hangzhou 310032 China

To well describe the Ti（IV）-catalyzed H2O2/O3 reaction in aqueous solution, a kinetic model was established based on its mechanism. This model was then validated by the experiments of acetic acid degradation in aqueous solution. It was found that the correlation coefficient of fittings was higher than 0.970. Three key operating factors affecting organic degradation in the Ti（IV）-catalyzed H2O2/O3 process were studied, including Ti（IV） concentration, dissolved ozone concentration and initial H2O2 concentration. Furthermore, some experiments were conducted to determine the rate constant for dissolved ozone decomposition initiated by Ti2O52＋. The rate constant measured is almost in accord with the data analyzed by this kinetic model. The goodness of fittings demonstrated that this model could well describe the kinetics of the Ti（IV）-catalyzed H2O2/O3 reaction mathematically and chemically. Therefore, this kinetic model can provide some useful information to optimize the parameters in ozonation of water containing certain pollutants.

关键词： ozone hydrogen peroxide Ti(IV) kinetic model acetic acid degradation

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4H-SiC探测器的温度及辐照性能研究

原子核物理评论 2024年第1期41卷 486-490页

作者：张耀锋杜园园张春雷曹李刚兰小飞黄永盛北京师范大学核科学与技术学院北京师范大学射线束技术与材料改性教育部重点实验室中国科学院高能物理研究所粒子天体物理重点实验室西华师范大学中山大学深圳校区

针对极端环境下耐高温和耐辐照半导体探测器的研制需求,利用外延层厚度为100μm的4H-SiC外延片通过欧姆接触和肖特基接触制备成肖特基二极管,封装成肖特基二极管探测器。在25℃～150℃的环境下,测量探测器的I-V特性曲线。结果表明,在温... 详细信息

针对极端环境下耐高温和耐辐照半导体探测器的研制需求,利用外延层厚度为100μm的4H-SiC外延片通过欧姆接触和肖特基接触制备成肖特基二极管,封装成肖特基二极管探测器。在25℃～150℃的环境下,测量探测器的I-V特性曲线。结果表明,在温度≤105℃时,漏电流曲线变化较小。当偏置电压为-500V时,温度从25℃上升至105℃,漏电流的变化率为0.33%℃。利用北京大学化学系60Co放射源对探测器进行辐照,对比总剂量1 Mrad的实验前、实验后的探测器I-V特性变化。结果表明,辐照前后探测器的漏电流无明显变化。

关键词： SiC探测器漏电流辐照损伤

Prompt acceleration of a μ^(+) beam in a toroidal wakefield driven by a shaped steep-rising-front Laguerre–Gaussian laser pulse

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Plasma Science and Technology 2022年第5期24卷 226-236页

作者： Xiaonan WANG xiaofei lan Yongsheng HUANG Youge JIANG Chunlei ZHANG Hao ZHANG Tongpu YU School of Physics and Astronomy China West Normal UniversityNanchong 637009People's Republic of China Key Laboratory of Beam Technology of Ministry of Education Beijing Normal UniversityBeijing 100875People's Republic of China School of Science Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107People's Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People's Republic of China Department of Physics National University of Defense TechnologyChangsha 410073People's Republic of China

Recent experimental data for anomalous magnetic moments strongly indicates the existence of new physics beyond the Standard *** μ^(+) bunches are relevant to μ^(+) rare decay,spin rotation,resonance and relaxation(μSR)technology,future muon colliders,and neutrino *** this paper,we propose prompt μ^(+) acceleration in a nonlinear toroidal wakefield driven by a shaped steep-rising-front Laguerre–Gaussian(LG)laser *** analytical model is described,which shows that a μ^(+) beam can be focused by an electron cylinder at the centerline of a toroidal bubble and accelerated by the front part of the longitudinal wakefield.A shaped LG laser with a short rise time can push plasma electrons,generating a higher-density electron sheath at the front of the bubble,which can enhance the acceleration *** acceleration field driven by the shaped steep-rising-front LG laser pulse is about four times greater than that driven by a normal LG laser *** simulation results show that a 300 MeV μ^(+) bunch can be accelerated to 2 GeV and its transverse size is focused from an initial value of w_(0)=5μm to w=2μm in the toroidal bubble driven by the shaped steep-rising-front LG laser pulse with a normalized amplitude of a=22.

关键词： plasma wakefield acceleration muon source laser shaping

Difference of blood pressure of patients with obstructive sleep apnea syndrome among pre-menopausal or postmenopausal women

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Difference of blood pressure of patients with obstructive sl...

The potential role and mechanism of 17β-Estradiol on IH induced endothelial cell injury

中华医学会呼吸病学年会——2013（第十四次全国呼吸病学学术会议）

作者： huajun xu xiaofei lan qingyun li lina zhou Department of Respiratory Medicine Ruijin HospitalShanghai Jiao Tong University School of Medicine

Aim To investigate the factors affecting blood pressure of pre- and postmenopausal women with obstructive sleep apnea syndrome(OSAS) Method A retrospective study including 207 women patients from 2009 to 2011 at Ruijin Hospital Sleep *** patients were divided into 4 groups:2 groups of pre-menopausal women(24 with and 30 without

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The potential role and mechanism of 17β-Estradiol on IH ind...

CONVERGENCE OF MODIFIED TRUNCATED EULER-MARUYAMA METHOD FOR STOCHASTIC DIFFERENTIAL EQUATIONS WITH HOLDER DIFFUSION COEFFICIENTS

中华医学会呼吸病学年会——2013（第十四次全国呼吸病学学术会议）

作者： huajun xu qingyun li xiaofei lan xiujuan zhang yan wang lina zhou Department of Pulmonary Ruijin HospitalShanghai Jiaotong University School of Medicine

Objective to explore whether estrogen/Trx-1/Txnip-1 participates in protecting cells from injury under the condition of intermittent hypoxia. Methods ECV304 human umbilical vein endothelial cells(HUVECs) was used in this *** 16h intermittent hypoxia,Endothelial impairment was assessed through detecting proliferation and apoptosis by WST-1 methods and flow cytometry respectively. MDA and GSH content were measured by TBA and DTNB method *** method is used for

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Journal of Computational Mathematics 2024年第4期42卷 1109-1123页

作者： Guangqiang lan Yu Jiang College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China

Convergence of modified truncated Euler-Maruyama(MTEM)method for stochastic differential equations(SDEs)with(1/2+α)-Holder continuous diffusion coefficients are investigated in this *** prove that the MTEM method for... 详细信息

关键词： Stochastic differential equations Modified truncated Euler-Maruyama method Strong convergence One-sided Lipschitz Holder continuous

A direct electrochemical biosensor for rapid glucose detection based on nitrogen-doped carbon nanocages

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Rare Metals 2024年第5期43卷 2184-2192页

作者： lan-lan Li Yu Zhao Li-Jia Pan Jian-Bin Xu Yi Shi College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China School of Electronic Science and Engineering Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China Department of Electronic Engineering The Chinese University of HongKongHongkong 999077China

Given the increasing number of diabetic patients,rapid and accurate detection of glucose in body fluids is *** study developed a direct electrochemical biosensor for glucose based on nitrogen-doped carbon nanocages(NCNCs).NCNCs possess a large specific surface area of 1395 m^(2)·g^(-1),a high N atomic content of 9.37%and good biocompatibility,which is favorable for enzyme loading and electron *** surface average concentration of electroactive glucose oxidase on NCNCs was 2.82×10^(-10)mol·cm^(-2).The NCNC-based direct electrochemical biosensor exhibited a high sensitivity of 13.7μA·(mmol·L^(-1))^(-1)·cm^(-2),rapid response time of 5 s and an impressive electron-transferrate constant(ks)of 1.87 s^(-1).Furthermore,we investigated an NCNC-based direct electron transfer(DET)biosensor for sweat glucose detection,which demonstrated tremendous promise for non-invasive wearable diabetes diagnosis.

关键词： Direct electron transfer(DET) Nitrogen-doped carbon nanocages(NCNCs) Glucose oxidase Biosensor

A Scalable Pillar Layered Metal-Organic Framework for Natural Gas Purification

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Chemical Research in Chinese Universities 2024年第4期40卷 675-681页

作者： LU Nan lan lan GAO Qiang LI Na BU Xian-He School of Materials Science and Engineering Nankai UniversityTianjin300350P.R.China State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin300071P.R.China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212003P.R.China

One-step harvest of high-purity methane(CH_(4))from ternary propane/ethane/methane(C_(3)H_(8)/C_(2)H_(6)/CH_(4))mixtures remains a desirable yet challenging goal for natural gas ***,adsorbents either suffer from high capacity and selectivity,or are caught in a dilemma of scalable ***,we demonstrate a scalable pillar layered metal-organic framework Ni-MOF for highly efficient one-step CH_(4)***-MOF exhibits high C_(2)H_(6)and C_(3)H_(8)uptakes of 83.3 and 86.1 cm^(3)/g at 298 K and 100 kPa and remarkable C_(2)H_(6)/CH_(4)(50/50,volume ratio,21.5)and C_(3)H_(8)/CH_(4)(50/50,volume ratio,212.0)***,high C_(2)H_(6)(42.2 cm^(3)/g at 10 kPa)and C_(3)H_(8)(64.7 cm^(3)/g at 5 kPa)capacities in the low-pressure region at 298 K were realized on Ni-MOF,suggesting the strong affinities of Ni-MOF towards C_(2)H_(6)and C_(3)H_(8).Furthermore,the dynamic breakthrough experiments revealed that purifying CH_(4)from natural gas in one-step can be achieved in Ni-MOF with high-purity(>99.8%)and productivity(346.0 cm^(3)/g).Most significantly,the production of Ni-MOF can be scalably synthesized at room temperature,rendering it promising potential for industrial *** combined advantages of exceptional separation performance,scalability,and cycle stability of Ni-MOF pave the way for one-step CH_(4)purification from natural gas.

关键词： Metal-organic framework Adsorption and separation Natural gas purification Scale-up synthesis

Editorial:special topic on advanced energy catalytic materials

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Science China Materials 2024年第6期67卷 1681-1683页

作者： Shaojun Guo Yaqian lan School of Materials Science and Engineering Peking UniversityBeijing 100871China School of Chemistry South China Normal UniversityGuangzhou 510630China

Aiming to lowering the society’s dependence on fossil fuels,energy catalysis stands at the forefront of technological advancement,which promises to revolutionize the way we harness,convert,and utilize renewable *** current special topic of our journal,titled"Advanced Energy Catalytic Materials",aims to highlight the latest innovations,challenges,and opportunities in this exciting field.

关键词： field utilize catalysis