In the present work,novel dual-functionalized hollow polymer particles （DF-HPP） with high density of carboxylate and amino dual functional groups have been specially designed and fabricated to serve as high-performa...In the present work,novel dual-functionalized hollow polymer particles （DF-HPP） with high density of carboxylate and amino dual functional groups have been specially designed and fabricated to serve as high-performance adsorbent for selective removal of basic dye （methylene blue,b-MB,as a model dye）.Due to both the high surface area and the extremely high density of carboxylate and amino groups,the DF-HPPs exhibited excellent adsorption property for methylene blue （b-MB）,including high adsorption capacity,fast adsorption/desorption rates,unique pH-sensitivity and easy recovery.The equilibrium adsorption data of b-MB on the DF-HPPs were evaluated using Freundlich and Langmuir isotherm models,and the equilibrium isotherm was better fit with Langmuir model with a maximum adsorption capacity of 538.8 mg/g at pH 12.More interestingly,the DF-HPPs showed a significant pH-dependent equilibrium adsorption capacity,which decreased dramatically from 516.1 mg/g to 24 mg/g as the solution pH decreased from 12 to 3.The dye-adsorbed DF-HPPs can be facilely and rapidly regenerated under mild condition （under weak acidic solution,pH 3,in 30 min） to recover both b-MB and the DF-HPPs,and the regenerated DF-HPPs can be reused for dye removal with high efficiency,indicating the exceptional recyclability of the DF-HPPs.展开更多
In an acetic acid–sodium acetate buffer solution of pH 3.6–6.8, a compound complex was formed between sodium hyaluronate (abbreviated as SH) and some basic bisphenylnaphthylmethane dyes, leading to a great enhanceme...In an acetic acid–sodium acetate buffer solution of pH 3.6–6.8, a compound complex was formed between sodium hyaluronate (abbreviated as SH) and some basic bisphenylnaphthylmethane dyes, leading to a great enhancement of the intensity of resonance Rayleigh scattering (RRS) and giving a new RRS spectrum, with its maximum scattering peak near 280 nm. It was also found that the intensity of RRS was directly proportional to the concentration of SH near the range between 0 and 3.0 mg/L. Based on these facts, a sensitive method for the determination of SH has been established. The method had good selectivity, and has been used for the determination of total amounts of SH in samples with satisfactory results. For the NB–SH system, the detection limit of SH was down to 13.7 ng/mL.展开更多
The ion transfer of the basic dye rhodamine B at the interface between water and nitro- benzene,water and 1,2-dichloroethane,as well as water and nitrobenzene-chlorobenzene mixtures has been studied by cyclic voltamme...The ion transfer of the basic dye rhodamine B at the interface between water and nitro- benzene,water and 1,2-dichloroethane,as well as water and nitrobenzene-chlorobenzene mixtures has been studied by cyclic voltammetry and chronopotentiometry with linear current scanning.A transfer mechanism of rhodamine B is proposed in terms of its electrochemical behavior,dissociation and distribution equilibria,and is ascribed as diffusion-controlled reversible process of rhodamine B.The ex- perimental data obtained for the relationship between interfacial half-wave potential ° and pH are in agreement with the theoretical equation based on the mechanism,and the standard interracial potential differences °and standard Gibbs energies G°are calculated by extrapolation.The effect of the nature of solvent on the transfer behavior and the stability of the interface have been dis- cussed.展开更多
In this work, a sensitive, rapid and simple method for the determination of trace amounts of potassium ferrocyanide in salinized foods and table salt using EV as a RRS probe is established. The detection limit （3σ）...In this work, a sensitive, rapid and simple method for the determination of trace amounts of potassium ferrocyanide in salinized foods and table salt using EV as a RRS probe is established. The detection limit （3σ） of the EV system is 7.8 ng/mL. This new method is more suitable for the determination of the trace amounts of potassium ferrocyanide in colour salinized foods and it can not be disturbed by the color of salinized foods.展开更多
Spectrophotometric determination of molybdenum, zinc, cobalt(Ⅱ), indium, selenium (Ⅳ), iron (Ⅲ), vanadium (Ⅴ), which is based on the ion-associate complexes formed by the reaction of metal ion-thiocyanate anionic ...Spectrophotometric determination of molybdenum, zinc, cobalt(Ⅱ), indium, selenium (Ⅳ), iron (Ⅲ), vanadium (Ⅴ), which is based on the ion-associate complexes formed by the reaction of metal ion-thiocyanate anionic complexes with some basic dyes in aqueous solution in the presence of a surfactant has been reported.展开更多
In this paper, a new anionic metal-organic framework, [In(PBPTTBA)][(CH_3)_2 NH_2](BUT-29) has been synthesized through the reaction of tetratopic acid ligand with double Lewis pyridine sites, 4,4',4'',4&#...In this paper, a new anionic metal-organic framework, [In(PBPTTBA)][(CH_3)_2 NH_2](BUT-29) has been synthesized through the reaction of tetratopic acid ligand with double Lewis pyridine sites, 4,4',4'',4'''-(4,4'-(1,4-phenylene)bis(pyridine-6,4,2-triyl)) tetrabenzoic acid(H_4 PBPTTBA) and In(NO_3)_2·5H_2O and fully characterized by single-crystal X-ray diffraction(SXRD), powder X-ray diffraction(PXRD),thermogravimetric analysis(TGA), infrared spectroscopy(IR), and elemental analysis(EA). BUT-29 can be used as an efficient adsorbent for the selective removal of organic cationic dyes in N,N0-dimethylformamide(DMF) solution. The adsorption capacities of BUT-29 toward methylene blue and crystal violet at 298 K can reach 1119 mg/g and 832 mg/g, respectively. Moreover, the adsorbed dyes can be released in the DMF solution of LiNO_3 gradually.展开更多
A series of basic copolyamides has been synthesized withadipic acid(AA),hexamethylene diamine(HMDA)anddiethylenetriamine(DETA).Intrinsic viscosity determi-nation,thermal analysis and infrared spectrum analysisof the c...A series of basic copolyamides has been synthesized withadipic acid(AA),hexamethylene diamine(HMDA)anddiethylenetriamine(DETA).Intrinsic viscosity determi-nation,thermal analysis and infrared spectrum analysisof the copolyamide indicates that molecular weight,ther-mal stability reduce whereas alkalinity increase with theincreasing fraction of DETA.Then acid dyeable polypro-pylene fibers are prepared by admixing polypropylene(PP)with those copolyamides prior to extrusion.Lowconcentration of the additive affects slightly on the crys-tallinity and the mechanical property of PP fiber.Themodified PP fibers have a nice acidic dyeability.展开更多
The nanophotocatalytic process using semiconducting oxides with a nanostructure is one of the technologies used for the destructive oxidation of organic compounds such as dyes. The photocatalytic oxidation of a textil...The nanophotocatalytic process using semiconducting oxides with a nanostructure is one of the technologies used for the destructive oxidation of organic compounds such as dyes. The photocatalytic oxidation of a textile dye—C. I. Basic Blue 41 (BB41) in aqueous solution was assessed by UV ray irradiation in the presence of TiO2 nanoparticles. The effect of initial dye concentration, pH and TiO2 loading were investigated and the optimized conditions for maximum amount of degradation were determined. Analysis of the kinetics showed pseudo-first-order model. The mineralization of the dye was reported by measuring the initial and final chemical oxygen demand of the solution that was irradiated under optimized conditions.展开更多
建立液相色谱-串联质谱法测定豆制品中碱性橙2的分析方法。样品经水-乙酸-乙酸铵-乙腈超声提取、离心、过滤膜后直接进样,采用Accucore a Q色谱柱(2.1×100 mm,2.6μm)分离,正离子模式扫描,外标法定量。结果表明碱性橙2在0.5~15.0 n...建立液相色谱-串联质谱法测定豆制品中碱性橙2的分析方法。样品经水-乙酸-乙酸铵-乙腈超声提取、离心、过滤膜后直接进样,采用Accucore a Q色谱柱(2.1×100 mm,2.6μm)分离,正离子模式扫描,外标法定量。结果表明碱性橙2在0.5~15.0 ng/m L范围内呈良好线性,相关系数(R2)≥0.99,其仪器检出限为为1.2μg/kg,定量限为4.0μg/kg;为了验证方法的精密度和准确度,做了重现性实验和加标回收实验,其RSD为1.91%~8.93%,回收率为80.6%~98.2%。本文适用于豆制品中碱性橙2的快速筛查和定量分析,方法前处理简单,测定快、准、灵敏度高。展开更多
文摘In the present work,novel dual-functionalized hollow polymer particles （DF-HPP） with high density of carboxylate and amino dual functional groups have been specially designed and fabricated to serve as high-performance adsorbent for selective removal of basic dye （methylene blue,b-MB,as a model dye）.Due to both the high surface area and the extremely high density of carboxylate and amino groups,the DF-HPPs exhibited excellent adsorption property for methylene blue （b-MB）,including high adsorption capacity,fast adsorption/desorption rates,unique pH-sensitivity and easy recovery.The equilibrium adsorption data of b-MB on the DF-HPPs were evaluated using Freundlich and Langmuir isotherm models,and the equilibrium isotherm was better fit with Langmuir model with a maximum adsorption capacity of 538.8 mg/g at pH 12.More interestingly,the DF-HPPs showed a significant pH-dependent equilibrium adsorption capacity,which decreased dramatically from 516.1 mg/g to 24 mg/g as the solution pH decreased from 12 to 3.The dye-adsorbed DF-HPPs can be facilely and rapidly regenerated under mild condition （under weak acidic solution,pH 3,in 30 min） to recover both b-MB and the DF-HPPs,and the regenerated DF-HPPs can be reused for dye removal with high efficiency,indicating the exceptional recyclability of the DF-HPPs.
文摘In an acetic acid–sodium acetate buffer solution of pH 3.6–6.8, a compound complex was formed between sodium hyaluronate (abbreviated as SH) and some basic bisphenylnaphthylmethane dyes, leading to a great enhancement of the intensity of resonance Rayleigh scattering (RRS) and giving a new RRS spectrum, with its maximum scattering peak near 280 nm. It was also found that the intensity of RRS was directly proportional to the concentration of SH near the range between 0 and 3.0 mg/L. Based on these facts, a sensitive method for the determination of SH has been established. The method had good selectivity, and has been used for the determination of total amounts of SH in samples with satisfactory results. For the NB–SH system, the detection limit of SH was down to 13.7 ng/mL.
基金The support of the National Natural Science Foundation of China is gratefully acknowledged.
文摘The ion transfer of the basic dye rhodamine B at the interface between water and nitro- benzene,water and 1,2-dichloroethane,as well as water and nitrobenzene-chlorobenzene mixtures has been studied by cyclic voltammetry and chronopotentiometry with linear current scanning.A transfer mechanism of rhodamine B is proposed in terms of its electrochemical behavior,dissociation and distribution equilibria,and is ascribed as diffusion-controlled reversible process of rhodamine B.The ex- perimental data obtained for the relationship between interfacial half-wave potential ° and pH are in agreement with the theoretical equation based on the mechanism,and the standard interracial potential differences °and standard Gibbs energies G°are calculated by extrapolation.The effect of the nature of solvent on the transfer behavior and the stability of the interface have been dis- cussed.
基金supported by the National Natural Science Foundation of China(No.20475045)Scientific Research Foundation of Bureau of Quality and Technical Supervision of China(No.2005 J0095).
文摘In this work, a sensitive, rapid and simple method for the determination of trace amounts of potassium ferrocyanide in salinized foods and table salt using EV as a RRS probe is established. The detection limit （3σ） of the EV system is 7.8 ng/mL. This new method is more suitable for the determination of the trace amounts of potassium ferrocyanide in colour salinized foods and it can not be disturbed by the color of salinized foods.
基金Supported by the National Natural Science Foundation of China
文摘Spectrophotometric determination of molybdenum, zinc, cobalt(Ⅱ), indium, selenium (Ⅳ), iron (Ⅲ), vanadium (Ⅴ), which is based on the ion-associate complexes formed by the reaction of metal ion-thiocyanate anionic complexes with some basic dyes in aqueous solution in the presence of a surfactant has been reported.
基金financially supported by the National Natural Science Foundation of China (NSFC, No. U1407119)
文摘In this paper, a new anionic metal-organic framework, [In(PBPTTBA)][(CH_3)_2 NH_2](BUT-29) has been synthesized through the reaction of tetratopic acid ligand with double Lewis pyridine sites, 4,4',4'',4'''-(4,4'-(1,4-phenylene)bis(pyridine-6,4,2-triyl)) tetrabenzoic acid(H_4 PBPTTBA) and In(NO_3)_2·5H_2O and fully characterized by single-crystal X-ray diffraction(SXRD), powder X-ray diffraction(PXRD),thermogravimetric analysis(TGA), infrared spectroscopy(IR), and elemental analysis(EA). BUT-29 can be used as an efficient adsorbent for the selective removal of organic cationic dyes in N,N0-dimethylformamide(DMF) solution. The adsorption capacities of BUT-29 toward methylene blue and crystal violet at 298 K can reach 1119 mg/g and 832 mg/g, respectively. Moreover, the adsorbed dyes can be released in the DMF solution of LiNO_3 gradually.
文摘A series of basic copolyamides has been synthesized withadipic acid(AA),hexamethylene diamine(HMDA)anddiethylenetriamine(DETA).Intrinsic viscosity determi-nation,thermal analysis and infrared spectrum analysisof the copolyamide indicates that molecular weight,ther-mal stability reduce whereas alkalinity increase with theincreasing fraction of DETA.Then acid dyeable polypro-pylene fibers are prepared by admixing polypropylene(PP)with those copolyamides prior to extrusion.Lowconcentration of the additive affects slightly on the crys-tallinity and the mechanical property of PP fiber.Themodified PP fibers have a nice acidic dyeability.
文摘The nanophotocatalytic process using semiconducting oxides with a nanostructure is one of the technologies used for the destructive oxidation of organic compounds such as dyes. The photocatalytic oxidation of a textile dye—C. I. Basic Blue 41 (BB41) in aqueous solution was assessed by UV ray irradiation in the presence of TiO2 nanoparticles. The effect of initial dye concentration, pH and TiO2 loading were investigated and the optimized conditions for maximum amount of degradation were determined. Analysis of the kinetics showed pseudo-first-order model. The mineralization of the dye was reported by measuring the initial and final chemical oxygen demand of the solution that was irradiated under optimized conditions.
