摘要：
SiO2-TiO2 mixed oxides was prepared by the homogeneous precipitation method using tetraethoxysilane and tetrabutyl titanate as precursors. Zinc catalyst supported on SiO2-TiO2 was prepared by the incipient wetness impregnation method and employed as effective catalyst for the direct synthesis of diphenyl carbonate from carbon dioxide and phenol. The stability of the heterogeneous catalyst was also studied in detail. No significant loss of activity was observed during the 5 runs except for the first recycle.
摘要：
This paper dissertated the cultivation status and existing problems of innovation talents for applied chemistry specialty, and introduced the cultivation approach of innovation talent and the proposition of teaching reform for applied chemistry speciality. Meantime, combined with practical conditions in our university, the concrete measures and means for implementing teaching reform and training innovation talents of applied chemistry speciality were investigated. A series of measures such as reform of teaching plan, updating the experimental teaching contents, strengthening the practice teaching, and establishing the innovation base and practice base were adopted to encourage students for innovation, the purpose is to cultivate students' comprehensive quality and the innovative ability, and construct cultivation mode of innovation talents for applied chemistry specialty.
摘要：
A new method of removing rotenone from contaminated water using molecularly imprinted polymeric microspheres (MIPMs) is described. The MIPMs were prepared by the emulsifier-free polymerization method. The removal efficiency and selective recognition ability of the MIPMs were studied. The highest removal efficiency was observed at pH = 8. Moreover, the MIPMs can be re-used for at least 10 times without losing any removal efficiency. The MIPMs provided a selective, simple, reliable and practicable solution to remove rotenone from contaminated water.
摘要：
For the first time a systematic research on the catalytic activity of CuXn (X=Cl, Br, I; x=1,2) for the cross-coupling reaction of alkyl halides with Grignard reagents was carried out and environmentally friendly, economical CuBr2 showed highest catalytic activity among the catalyst. The conditions of the cross-coupling reaction were studied. The suitable amount of catalyst, reaction temperature and time are 0.3% mol (based on alkyl halide), 67°C (reflux), 6 h, respectively. Under the optimal conditions, the yields of the cross-coupling could reach up to 93%. Moreover, Grignard reagent with an electron-rich group reacted rapidly and with an electron-withdrawing group reacted sluggishly.
摘要：
Nanoparticles of sulfur with an average diameter of 5-35 nm were successfully prepared using eggshell membrane (ESM) as template in the the presence of surfactant Tween-80. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FTIR). The sizes of the nanoparticles sulfur were estimated by Debye-Scherrer formula according to XRD spectrum. Based on the detailed investigation, a possible synthesis mechanism is discussed here.
会议论文集名称：
the international conference on Frontier of Nanoscience and Technology (2011纳米科学与技术国际会议(ICFNST 2011))论文集
关键词：
Porous spheres;Mn3O4;Adsorption;Alizarin red
摘要：
Spherical assembly composed of Mn3O4 nanoparticles with an average diameter of 400-600 nm have been prepared by a simple reactions between Ba(MnO4)(2), H2SO4 and MnSO4 and thermal decomposition at 580 degrees C. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spherical assembly composed of Mn3O4 for alizarin red was investigated. The adsorbent showed high efficiency for the removal of alizarin red in water. The equilibrium of adsorption was achieved within 8 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 32.8 mg g(-1).
摘要：
Polystyrene microspheres were prepared by the emulsifier-free polymerization method. Using the polystyrene microspheres as seeds, p-nitroaniline as template molecules, the monodispersed molecularly imprinted polymer microspheres (MIPMs) were prepared by a single-step swelling and polymerization method. The monodispersed molecular imprinted polymers with porous structure were characterized by SEM, and UV-visible spectrophotometry. The adsorption performance of MIPMs for p-nitroaniline was investigated.
摘要：
Monodispersed nanotriangles of gold have been prepared by a simple reaction between HAu Cl4·4H2O, KOH and NH2OH·HCl in the presence of gelatinGelatin played a decisive role as an inhibitor of the d
摘要：
To improve the photocatalysis and absorbability of nanometer TiO2 particles, TiO2/MnO2 and TiO2/Mn3O4 composite particles in micrometer were prepared by template method. The morphologies and structure of the composite particles were characterized by SEM and XRD. The photocatalytic abilities and absorbability of alizarin red and methyl orange solution have been tested. The results show that the composite particles have excellent photocatalytic abilities and absorbability.
摘要：
The thiol-functionalized eggshell membrane (TF-ESM) was prepared by esterification between thioglycolic acid (CH2SHCOOH) and oxygen-containing functional groups on eggshell membrane (ESM). A promising potential biosorbent, TF-ESM, was used for the removal of toxic mercury in wastewater. Aqueous of mercury ions removing properties by TF-ESM were studied through batch experiments. The results indicated that the modified ESM has greatly enhanced the adsorption capacity for Hg2+, the maximum capacity was increased more than 3-fold in comparison with the unmodified ESM, from 19.4 mg g-1 to 71.9 mg g-1. The optimum of pH value for Hg adsorption was in the range of 2-8, which the removing rate over 96%. The results obtained show that the novel thiol-functionalized eggshell membrane performed well the removal and recovery of mercury from low concentration wastewaters.
摘要：
The determination of chlorpyrifos at low ngL-1 levels in wastewater requires highly selective and sensitive analytical procedures. The removal of matrix components during sample preparation results in significant benefits towards reducing the matrix effects during GC analysis. Therefore this work describes a simple method to enrich and clean up chlorpyrifos from sewage water using molecularly imprinted solid phase extraction (MISPE). Final analysis was performed by gas chromatography. The performance of this method has been evaluated in water samples in terms of recovery, precision, and method quantification limit. Recovery for chlorpyrifos ranged between 99 and 105% with RSD values below 7.9%. The performance of the method was further emphasized by the study of different water samples. In these samples, chlorpyrifos were detected in concentration above method quantification limits ranging from 50 to 3000 ngL-1.
摘要：
This study was aimed at the development of a green and reusable catalyst for Friedel-Crafts acylation. Firstly, Hydroxyapatite (HAP) and Hydroxyapatite-zinc bromide (HAP-ZnBr2) have been prepared by the co-precipatation method and hydrothermal method respectively. Their structures were characterized by X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) and Infrared Spectroscopy (IR). The catalytic efficiency of HAP-ZnBr2 was examined for Friedel-Crafts acylation of anisole. The results showed that the catalyst was green, high activity, high selectivity and it could be reused at least 5 times without obvious activity loss.
摘要：
A new method of removing chlorpyrifos from contaminated water using molecularly imprinted polymeric microspheres for chlorpyrifos is described. Molecularly imprinted polymeric microspheres were prepared by the emulsifier-free polymerization method. The removal efficiency and selective recognition ability of the molecularly imprinted polymeric microspheres were studied. The highest removal efficiency was observed at pH=7. Moreover, molecularly imprinted polymeric microspheres can be re-used for at least 10 times without losing any removal efficiency. Molecularly imprinted polymeric microspheres provided a selective, simple, reliable and practicable solution to remove chlorpyrifos from contaminated water.
会议论文集名称：
The 4th International Conference on Bioinformatics and Biomedical Engineering(第四届IEEE生物信息与生物医学工程国际会议 iCBBE 2010)论文集
关键词：
sodium citrate;tween 80;liquid-solid extraction;phenolic compounds;hydrogen bond
摘要：
The proper extraction conditions for phenol, o-chlorophenol and o-nitrophenol were investigated by using the liquid-solid extraction system composed of Tween 80-sodium citrate-H2O. 10.5% (v/ v) Tween 80, 2.6000 g(.)l(-1) sodium citrate, extraction acidity of pH 5.95 had been found optimal for extraction of phenolic compounds. Under the above-mentioned conditions the once average recoveries of phenol, o-chlorophenol and o-nitrophenol in analogous water samples were 99.5%, 95.3%, 94.7%, respectively. When sodium citrate was as salt separate phase, the acidity of the solution not only could change the shape of sodium citrate, but also had effects on extraction yield (E%) of phenols as well. Through the discussion of the extraction mechanism for Tween 80 solid phase, it was indicated that the extraction in this system had been achieved by the formation of the hydrogen bond between Tween 80 and the phenolic compounds.
会议名称：
2nd International Conference on Multi-Functional Materials and Structures, MFMS-2009
会议时间：
9 October 2009 through 12 October 2009
关键词：
Catalytic materials;Growth from solutions;Nanostructures;Platinum
摘要：
Cubic assembly composed of platinum nanoparticles has been prepared by a simple reaction between H2PtCl6•6H2O, NaOH and NaBH4 in the presence of deionized gelatin. Gelatin played a decisive role as an inhibitor of the direct reaction of NaBH4 with H2PtCl6•6H2O and coagulation of the growing platinum in producing the cubic assembly composed. In the absence of gelatin, we can only obtain irregular large platinum particles. With decreasing the temperature, the viscosity of the solution increased. The diffusions of BH4- ions and PtCl62− ions are slower. The assembly composed of platinum nanoparticles was synthesized at 10 oC. The products were characterized by X-ray powder diffraction, scanning electron microscope, X-ray photoelectron spectra and UV-visible absorption spectroscopy. The scanning electron microscope images show the as prepared platinum with cubes and the average dimensions is about 0.35-0.45 μm. The UV-visible absorption spectrum of the as prepared platinum particles dispersed in ethanol solution shows one absorption peaks at 215nm. The size of the subunits of the polycrystalline platinum particles was calculated to be about 4 nm according to half width of the diffraction peaks using Debye–Scherer equation.
会议名称：
Energy and Environment Technology, 2009. ICEET '09. International Conference on
关键词：
Biomass gasification;palm oil waste;catalyst;hydrogen production
摘要：
The catalytic steam gasification of palm oil wastes for hydrogen-rich gas production was experimentally investigated in a combined fixed bed reactor using the newly developed nano-NiO/??-Al<sub>2</sub>O<sub>3</sub> catalyst. The results indicated that the nano-NiO/??-Al<sub>2</sub>O<sub>3</sub> catalyst had greater activity for the cracking of tar in vapor and of hydrocarbons and a higher hydrogen yield than the calcined dolomite in catalytic steam gasification of palm oil wastes. Meanwhile, a series of experiments have been performed to explore the effects of temperature, steam to biomass ratio (S/B) and biomass particle size on gas composition and gas yield. The experiments demonstrated that temperature was the most important factor in this process, higher temperature contributed to more hydrogen production and gas yield. Compared with biomass catalytic gasification, the introduction of steam improved gas quality and yield, the optimal value of S/B was found to be 1.33 under the present operating condition. It was also shown that a smaller particle was more favorable for gas quality and yield.
