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Indirect Electrochemical Oxidation of 4-Amino-dimethyl-aniline Hydrochloride

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Chemical Research in Chinese Universities 2006年第3期22卷 360-363页

作者： ZHANG Qiang KANG bo XU Hong lin hai-bo Department of Chemistry College of Science Beijing Institute of Technology Beefing 100081 P. R. China College of Chemistry Jilin University Changchun 130021 P. R. China

The indirect dectrechemical oxidation of 4-amino-dimethyl-aniline hydrochloride containing wastewater generated from vanillin production is presented. Experiments were conducted at a constant current density of 30 rnA/cm^2 via a Ti/Bu-Ti-Sn ternary oxide coated anode and an undivided reactor. During the various stages of the electrolysis, parameters such as the values of chemical oxygen demand（COD） and total organic carbon（TOC） were determined in order to evaluate the feasibility of the electrochemical treatment. The energy consumption and the current efficiency during the electrolysis were calculated. The present study proves the effectiveness of the electrochemical treatment for wastewater resulted from vanillin production.

关键词： Electrochemical oxidation 4-Amino-dimethyl-aniline Wastewater treatment Vanillin

Preparation of calcium carbonate particles coated with titanium dioxide

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International Journal of Minerals,Metallurgy and Materials 2009年第5期16卷 592-597页

作者： hai lin Ying-bo Dong Le-yong Jiang School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China

The preparation of a new mineral composite material, calcium carbonate particles coated with titanium dioxide, was studied. The mechanism of the preparation process was proposed. The new mineral composite material was made by the mechanoehemieal method under the optimum condition that the mass ratio of calcium carbonate particles to titanium dioxide was 6.5：3.5. The mass ratios of two different types of titanium dioxide （anatase to rutile） and grinding media to grinded materials were 8：2 and 4：1 respectively, and the modified density was 60%. Under this condition, the new material was capable of forming after 120-min modification. The hiding power and oil absorption of this new material were 29.12 g/m^2 and 23.30%, respectively. The results show that the modification is based on surface hydroxylation. After coating with titanium dioxide, the hiding power of calcium carbonate can be improved greatly. The new mineral composite materials can be used as the substitute for titanium dioxide.

关键词： calcium carbonate mechano-chemical process titanium dioxide film hydroxylation

Electrochemistry of Hydroquinone Derivatives at Metal and Iodine-modified Metal Electrodes

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Chemical Research in Chinese Universities 2006年第4期22卷 493-499页

作者： HOU Peng HAN Dong-xue NIU Li lin hai-bo State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China Graduate School of the Chinese Academy of Sciences Beijing 100039 P. R. China College of Chemistry Jilin University Changchun 130021 P. R. China

The difference in the electrochemical behavior of hydroquinone and pyrocatechol at platinum and gold surfaces was analyzed using voltammetry and attenuated total reflection Fourier transform infrared spectroscopy. The results show that the hydroquinone derivatives are adsorbed on a gold surface with vertical orientation, which makes the electron transfer between the bulk species and the electrode surface easier than that in the case of flat adsorption of hydroquinone derivatives that occurs at a platinum electrode. The formation of the vertical conformation and the rapid process of electron transfer were also confirmed by quantum chemistry calculations. In addition, the pre-adsorbed iodine on the electrodes played a key role on the adsorbed configuration and electron transfer of redox species.

关键词： Hydroquinone derivatives Iodine-modified Electrochemistry

Preparation of SiC_p/Al_2O_3-Al Composites by Directed Metal Oxidation

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Chinese Journal of Aeronautics 2006年第B12期19卷 47-50页

作者： lin Ying YANG hai-bo WANG Fen ZHU Jian-feng School of Materials Science and Engineering Shaanxi University of Science ＆ Technology Xianyang 712081 China

SiCp/Al2O3-Al composites were synthesized by means of direct metal oxidation method. The composition and microstructures of the composites were investigated using X-ray diffraction （XRD）, scanning electron microscopy （SEM） and metallurgical microscope. The effects of technical parameters on the properties of the product were analyzed. The results indicate that the composite possesses a dense microstructure, composed of three interpenetrated phases. Of them, SiO2 layer prohibits the powdering of the composites; Mg promotes the wetting and infiltration of the system and Si restricts the interfacial reaction while improving the wetting ability between reinforcement and matrix.

关键词： SiCD/Al2O3-Al composites: directed metal oxidation Al-Mg-Si alloy SiC reinforcement

Hardy spaces H^p over non-homogeneous metric measure spaces and their applications

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Science China Mathematics 2015年第2期58卷 309-388页

作者： FU Xing lin hai bo YANG Da Chun YANG Dong Yong School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex SystemsMinistry of Education College of Science China Agricultural University School of Mathematical Sciences Xiamen University

Let(X,d,)be a metric measure space satisfying both the geometrically doubling and the upper doubling *** ρ∈(1,∞),0 详细信息

Let(X,d,)be a metric measure space satisfying both the geometrically doubling and the upper doubling *** ρ∈(1,∞),0bounded from Hp,q,γ,δmb,ρ(μ)(or Hp,q,γatb,ρ(μ))into Lp(μ),and from Hp,q,γ+1atb,ρ(ρ+1)(μ)into H p,q,γ,12(δ-νp+ν)mb,ρ(μ).The boundedness of the generalized fractional integral Tβ(β∈(0,1))from Hp1,q,γ,θmb,ρ(μ)(or Hp1,q,γatb,ρ(μ))into Lp2(μ)with 1/p2=1/p1-β is also *** authors also introduce theρ-weakly doubling condition,withρ∈(1,∞),of the measure and construct a non-doubling measure satisfying this *** isρ-weakly doubling,the authors further introduce the Campanato space Eα,qρ,η,γ(μ)and show that Eα,qρ,η,γ(μ)is independent of the choices ofρ,η,γand q;the authors then introduce the atomic Hardy space Hp,q,γatb,ρ(μ)and the molecular Hardy space Hp,q,γ,mb,ρ(μ),which coincide with each other;the authors finally prove that Hp,q,γatb,ρ(μ)is the predual of E1/p-1,1ρ,ρ,1(μ).Moreover,if is doubling,the authors show that Eα,qρ,η,γ(μ)and the Lipschitz space Lipα,q(μ)(q∈[1,∞)),or Hp,q,γatb,ρ(μ)and the atomic Hardy space Hp,q at(μ)(q∈(1,∞])of Coifman and Weiss ***,if(X,d,)is an RD-space(reverse doubling space)with(X)=∞,the authors prove that Hp,q,γatb,ρ(μ),Hp,q,γ,mb,ρ(μ)and Hp,q at(μ)coincide for any q∈(1,2].In particular,when(X,d,):=(RD,||,dx)with dx being the D-dimensional Lebesgue measure,the authors show that spaces Hp,q,γatb,ρ(μ),Hp,q,γ,mb,ρ(μ),Hp,q,γatb,ρ(μ)and Hp,q,γ,mb,ρ(μ)all coincide with Hp(RD)for any q∈(1,∞).

关键词： non-homogeneous metric measure space ρ-weakly doubling measure Hardy space Campanato space Lipschitz space Calder′on-Zygmund operator atomic block molecular block

Comparison Between Performances of Pbo_2 and F^--doped Pbo_2 Anodes for Electrochemical Degradation of Aniline

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Chemical Research in Chinese Universities 2010年第6期26卷 991-995页

作者： WANG Xuan HUANG Wei-min LI Hui-ting ZHANG Xue-na LU hai-yan lin hai-bo College of Chemistry Jilin University Changchun 130012 P. R. China Suzhou Nistar Chemical Technology Co. Ltd. Suzhou 215123 P. R. China

The paper deals with the influence of anode material on the efficiency of degradation for organic pollutants in water *** electrochemical performance of fluorine ion doped lead dioxide（F--Pbo2） electrode for the degradation of aniline was compared with that of undoped lead dioxide（Pbo2） electrode by ultraviolet-visible（UV-Vis） spectroscopy,linear voltammetry and other analytical methods,such as the measurement by chemical oxygen demand analyzer,high performance liquid chromatography and scanning electron *** was shown that both Pbo2 electrode and F--Pbo2 electrode could make aniline be mineralized completely and have the same degradation course,but F--Pbo2 electrode has much higher electrocatalytic activity than undoped Pbo2 electrode for the electrochemical degradation of *** experimental results confirm that F--Pbo2 electrode has much higher potential for oxygen evolution than undoped Pbo2 electrode.

关键词： Lead dioxide electrode Electrochemical oxidation Degradation Aniline

Interaction of Biologically Active Molecules with Sulfur-modified Gold Surface

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Chemical Research in Chinese Universities 2007年第3期23卷 339-342页

作者： DING Xue-feng YANG Gui-fu WANG Xiao WANG Zi-chen lin hai-bo College of Chemistry and Key Laboratory of Surface ＆ Interface Chemistry of Jilin Province Jilin University Changchun 130021 P. R. China Department of Computer Northeast Normal University Changchun 130024 P. R. China Jilin Province Product Quality Supervision Test Institute Changchun 130012 P. R. China

The immobilization of cytochrome c or horseradish peroxidase at the sulfur-modified gold electrode exhibits a rapid electron transfer behavior because of its specific orientation on the electrode surface and the inter... 详细信息

关键词： Sulfur-modified electrode Electron transfer Bioactive molecules

Synthesis and Temperature-dependent Electrochemical Properties of boron-doped Diamond Electrodes on Titanium

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Chemical Research in Chinese Universities 2012年第3期28卷 507-510页

作者： DU Li-li SUN Jian-rui CUI Hang LI Hong-dong CUI Tian lin hai-bo State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130012P.R.China College of Chemistry Jilin UniversityChangchun 130012P.R.China State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical ChemistryJilin UniversityChangchun 130021P.R.China

On the sand-blasting-treated titanium（Ti） substrate, the boron-doped diamond（BDD） electrodes with a wide potential window were prepared by microwave plasma chemical vapor deposition（MPCVD）. The electrochemi- cal oxidation ratios of phenol at BDD/Ti electrodes at elevated temperatures（from 20 ℃ to 80 ℃） were examined by the chemical oxygen demand（COD） of phenol electrolyte during electrolysis. The results show that the COD removal was increased at high temperatures and the optimized temperature for enhancing the electrochemical oxidation ratio of phenol is 60 ℃. The mechanism for the temperature-dependent electrochemical oxidation ratios of phenol at the electrodes was investigated. The study would be favorable for further improving the performance of BDD/Ti elec- trodes, especially working at high temperatures.

关键词： BDD/Ti electrode Microwave plasma chemical vapor deposition Phenol Electrochemical degradation

The comparison of different spectrum analysis methods for LOD time series

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Applied Geophysics 2018年第3期15卷 382-392页

作者： lin hai-bo Zhao Juan Department of Astronomy Beijing Normal UniversityBeijing 100875China

The variations in the Earth's rotation are important to space dynamic theory and natural disasters because they affect the length-of-day(LOD) and consequently human lives. We use maximum entropy method(MEM), Lomb method(LOMB), and phase dispersion minimization(PDM) to determine the natural periods of equally spaced LOD time series. We transform the observational monthly LOD time series(LODM) to unequally sampled series(LODMD) by removing every fourth, third, and half of the total samples. We also apply spline interpolation to LODMD to yield equally spaced time series(LODMDN). The results suggest that regardless of the time series, the MEM frequency is 0.1660 month^(-1) and 0.0840 month^(-1), whereas LOMB and PDM yield 0.166 month^(-1) and 0.083 month^(-1), respectively. Furthermore, missing data that are less than half of the total data or spline interpolation do not affect the analysis. For the amplitude, neither missing data nor spline interpolation affect the analysis.

关键词： LOD MEM LOMB PDM Unequally