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Synthesis and Characterization of Yttrium Doped Nano-zirconia by a cationic surfactant-assisted Route

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Chinese Journal of Structural Chemistry 2006年第12期25卷 1512-1516页

作者：俞建长胡胜伟 College of Material Science and Engineering Fuzhou University

Recently, more and more interest has been focused on zirconia for its unique characteristics. In this paper, via the preceding preparation technique, yttrium can be successfully incorporated into nano-zirconia by a cationic surfactant-assisted route. The methods of XRD, TEM, EDS, Uv-vis and N2 adsorption-desorption are adopted to characterize the synthesized samples. The results show that the yttrium has been successfully incorporated into the zirconia lattice, and the thermal stability of yttrium doped zirconia has been enhanced remarkably.

关键词： cationic surfactant nano-zirconia yttrium doping modification

A New Nanocatalytic Spectrophotometric Assay for cationic surfactant Using Phosphomolybdic Acid-Formic Acid-Nanogold as Indicator Reaction

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Chinese Journal of Chemistry 2012年第1期30卷 59-64页

作者：蒋治良覃惠敏梁爱惠 Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection Ministry of EducationGuangxi Key Laboratory of Environmental EngineeringProtection and AssessmentGuangxi Normal UniversityGuilinGuizhou 541004China

In the pH 7.4 Na2HPO4-NaH2PO4 buffer solution, the cationic surfactant （CS） interacted with nanogold particles （NG） to form NG aggregations （NGA） that resulted in its color changing from wine red to blue-violet. NG has a strong catalysis on the formic acid-phosphomolybdic acid （PMo） colored reaction, but that of the NGA catalysis is weak. With the increase of CS concentration, the NGA increased and the NG decreased, the catalysis decreased and the absorption value at 700 nm decreased linearly. The concentrations of 6.25-250 nmol/L tetradecyl dimethyl benzyl ammonium chloride （TDBAC）, 0.625-250 nmol/L cetyltrimethyl ammonium bromide （CTMAB） and 12.5 -500 nmol-L 1 dodecyldimethylbenzyl ammonium chloride （DDBAC） had good linear responses to the decreased absorption value （AA70o nm）, with molar absorption coefficients of 2.2 × 106, 2.1 × 106 and 9 ×105 Lomol *** 1 respectively. This method was simple, highly sensitive and low-cost.

关键词： nanogold catalysis cationic surfactant phosphomolybdic acid spectrophotometry

Effect of Sodium Halide on Dynamic Surface Tension of a cationic surfactant

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Chinese Journal of Chemistry 2005年第8期23卷 957-962页

作者：吕锋锋郑利强高艳安李干佐佟振合 Key Laboratory of Colloid and Interface Chemistry (Shandong University) Ministry of Education Ji'nan Shandong 250100 China Technical Institute of Physics and Chemistry the Chinese Academy of Sciences Beijing 100101 China

The equilibrium and dynamic surface tension （DST） of the novel cationic surfactant, 3-（p-nonylphenoxy）-2-hydroxylpropyl trimethyl ammonium bromide, abbreviated as RTAB, were studied. The effect of sodium halide such as NaCl, NaBr and NaI on the DST behavior of the RTAB solution below its CMC was studied in detail. Due to the preferential adsorption, the effect of hydration and salting out, the ability to reduce the DST values at the same concentration was in the order of NaI〉NaBr〉NaCl. Attributed to its high surface activity, the equilibrium time of the DST of the surfactant solution was insensitive to the ionic strength.

关键词： cationic surfactant dynamic surface tension preferential adsorption salting out effect

Adsorption of Metsulfuron and Bensulfuron on a cationic surfactant-Modified Paddy Soil

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Pedosphere 2007年第1期17卷 101-108页

作者： LIAO Min XIE Xiao-Mei College of Environmental and Resource Sciences Department of Resources Science Zhejiang University Hangzhou 310029 （China）

Adsorption isotherms of metsulfuron and bensulfuron on a hexadecyltrimethylammonium （HDTMA） bromide-modified paddy soil under different ionic strengths, with divalent cation Cu^2＋, or having different pH were studied to describe their adsorptive behavior, and to try to explain the adsorption process of a sulfonylurea compound with a carbamoylsulfamoyl group in the modified soil environment. All the adsorption isotherms fitted the Freundlich equation well, and the HDTMA treatment of paddy soil dramatically enhanced adsorption capacity of metsulfuron or bensulfuron. Also, an increase of ionic strength and the addition of divalent heavy metal cation Cu^2＋ on the HDTMA-modified paddy soil increased the adsorption of metsulfuron or bensulfuron. Additionally, for metsulfuron and bensulfuron in the aqueous phase, adsorption capacity of the HDTMA-modified paddy soft gradually increased with decreasing pH.

关键词： adsorption bensulfuron cationic surfactant metsulfuron paddy soil

Effect of cationic surfactant on the Inhibition of Ligninase by Hydrogen Peroxide

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Chinese Chemical Letters 2003年第8期14卷 836-839页

作者： ZhuanNiYU XiRong,HUANG ShaoFangSONG DanWANG XueMeiLU YueZhongLI YinBoQU PeiJiGAO KeyLabforColloidandInterfaceChemistryoftheEducationMinistryofChina ShandongUniversityJinan250100 KeyLabforColloidandInterfaceChemistryoftheEducationMinistryofChina ShandongUniversityJinan250100 StateKeyLabofMicrobialTechnologyOfChina ShandongUniversityJinan250100 StateKeyLabofMicrobialTechnologyOfChina ShandongUniversityJinan250100

The inhibition of ligninase by hydrogen peroxide in the presence of cationic surfactant CTAB was studied by kinetic spectrophotometric technique. Results showed that addition of CTAB enhanced the inhibition by H2O2, but it did not alter the inhibition pattern and the inhibition constant changed little with the concentration of CTAB. Modification of the enzymic protein by the surfactant monomer may be responsible for the above mentioned results.

关键词： Ligninase hydrogen peroxide cationic surfactant inhibitory kinetics veratryl alcohol.

Effect of cationic surfactant on the Gelation of HPAM by Cr(III)

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Chinese Chemical Letters 2002年第6期13卷 573-574页

作者： HongDongDUAN WanGuoHOU 等 InstituteofPolymerScienceandEngineering DepartmentofChemicalEngineeringZhejiangUniversityHangzhou310027 KeyLaboratoryforColloidandInterfaceChemistryofEducationMinistry Shandong

The effect of cationic surfactant cetyltrimethylammonium bromide (CTAB) on the gelation of partially hydrolyzed polyacrylamide (HPAM) by Cr (III) was investigated by using rheological measurements. The results indi... 详细信息

关键词： Rheological study cationic surfactant gelation.

The kinetics study of the reduction of Fast Green dye with cetylpyridinum chloride as cationic surfactant

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Frontiers of Chemistry in China 2011年第2期6卷 105-112页

作者： Muhammad SULTAN Hajira TAHIR Khalid AHMED Qazi JAHANZEB Department of Chemistry University of KarachiKarachi 75270Pakistan

The kinetics of the reaction of Fast Green dye(FG)with cetylpyridinum chloride was studied in alkaline medium by UV-Visible *** of Fast Green dye was carried out by varying the fast green dye concentration,cetylpyridinum chloride concentration and concentration of sodium *** the present study the reduction of dye was carried out in order to reduce the color *** interaction of dye was carried out with reducing analyte(cetylpyridinum chloride).The rate of the reaction was determined by varying the above parameters at different *** was observed that the reduction followed pseudo first-order kinetics with respect to dye,surfactant,OH–ion concentration according to the following reaction *** like entropy of activation(ΔS)and free energy of activation(ΔG)showed the extremely solvated states of transient complex which was less disorderly arranged than the oxidized form of dye,whereas Ea values reflects a high amount of energy required for the reduction of dye with cetylpyridinum chloride.

关键词： Fast Green cetylpyridinum chloride OH-ions decoloration cationic surfactant

Enabling an Inorganic-Rich Interface via cationic surfactant for High-Performance Lithium Metal Batteries

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Nano-Micro Letters 2024年第8期16卷 1-17页

作者： Zejun Sun Jinlin Yang Hongfei Xu Chonglai Jiang Yuxiang Niu Xu Lian Yuan Liu Ruiqi Su Dayu Liu Yu Long Meng Wang Jingyu Mao Haotian Yang Baihua Cui Yukun Xiao Ganwen Chen Qi Zhang Zhenxiang Xing Jisheng Pan Gang Wu Wei Chen Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117543Singapore Agency for Science Technology and Research(A*STAR)Institute of High-Performance Computing1 Fusionopolis Way#16‑16 ConnexisSingapore 138632Singapore Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207People’s Republic of China Agency for Science Technologyand Research(A*STAR)Institute of Materials Research and EngineeringInnovis2 Fusionopolis Way#08‑03Singapore 138634Singapore

An anion-rich electric double layer(EDL)region is favorable for fabricating an inorganic-rich solid-electrolyte interphase(SEI)towards stable lithium metal anode in ester ***,cetyltrimethylammonium bromide(CTAB),a cationic surfactant,is adopted to draw more anions into EDL by ionic interactions that shield the repelling force on anions during lithium *** situ electrochemical surface-enhanced Raman spectroscopy results combined with molecular dynamics simulations validate the enrichment of NO_(3)^(−)/FSI−anions in the EDL region due to the positively charged CTA^(+).In-depth analysis of SEI structure by X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry results confirmed the formation of the inorganic-rich SEI,which helps improve the kinetics of Li^(+)transfer,lower the charge transfer activation energy,and homogenize Li *** a result,the Li||Li symmetric cell in the designed electrolyte displays a prolongated cycling time from 500 to 1300 h compared to that in the blank electrolyte at 0.5 mA cm^(-2) with a capacity of 1 mAh cm^(-2).Moreover,Li||LiFePO_(4) and Li||LiCoO_(2) with a high cathode mass loading of>10 mg cm^(-2) can be stably cycled over 180 cycles.

关键词： cationic surfactant Lithium nitrate additive Solid-electrolyte interphase Electric double layer Lithium metal batteries

Viscoelastic Properties and Molecular Dynamics Simulation of cationic surfactant/Aromatic Salt Mixed Solutions

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Viscoelastic Properties and Molecular Dynamics Simulation of...