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SYNTHESIS AND BIOTECHNOLOGICAL APPLICATIONS OF VINYL POLYMERINORGANIC HYBRID AND mesoporous materials

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Chinese Journal of Polymer Science 2000年第1期18卷 1-7页

作者： Yen Wei Kun-yuan Qiu Department of Chemistry, Drexel University, Philadelphia, Pennsylvania 19104, USA Department of Polymer Science and Engineering, Peking University, Beijing 100871, China Drexel University 美国北京大学高分子科学与工程系北京

We describe the sol-gel synthesis of a new family of organic-inorganic hybrid materials, in which various vinyl polymers are covalently bonded to and uniformly distributed in inorganic oxide matrices. The materials can be tailored to have both good toughness and hardness while maintaining excellent optical transparency. Doping the sol-gel metal oxides with optically active compounds such as D-glucose results in new optical rotatory composite materials. Removal of the dopant compounds from the composites affords mesoporous oxide materials; which represents a new, nonsurfactant-templated route to mesoporous molecular sieves. We have successfully immobilized a series of enzymes and other bioactive agents in mesoporous materials. Catalytical activities of the enzyme encapsulated in mesoporous materials were found to be much higher than those encapsulated in microporous materials.

关键词： vinyl polymer-inorganic hybrid materials mesoporous materials sol-gel process biotech-nological applications

Synthesis of lathanum or La-B doped KIT-6 mesoporous materials and their application in the catalytic oxidation of styrene

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Journal of Rare Earths 2010年第3期28卷 369-375页

作者：詹望成郭杨龙王艳芹郭耘卢冠忠 Key Laboratory for Advanced materials Research Institute of Industrial CatalysisEast China University of Science and Technology

La-doped and La-B-doped KIT-6 mesoporous materials were prepared by direct hydrothermal synthesis with pH-adjusting method and characterized by X-ray diffractometer(XRD),nitrogen sorption,FT-IR,UV-Vis,X-ray photoelectron spectroscopy(XPS) and *** catalytic performance for the oxidation of styrene by hydrogen peroxide,tert-butyl hydroperoxide or oxygen was *** results showed that the introduction of heteroatoms did not destroy the mesostructure of KIT-6 with cubic Ia3d space *** or ...

关键词： mesoporous materials oxidation of styrene benzaldehyde styrene oxide rare earths

Functional mesoporous materials in clean energy: an interview with Dongyuan Zhao

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National Science Review 2023年第12期10卷 223-227页

作者：朱禾 the editorial office of NSR in Beijing

National Science Review invited Prof. Dongyuan Zhao of Fudan University for an interview focusing on his team’s renowned research on functional mesoporous materials and energy-related applications. Prof. Zhao is a professor of chemistry and materials science, and a member of the Chinese Academy of Sciences. He received his PhD in chemistry from Jilin University in 1990. He has since focused his research on the synthesis and structure of porous materials and molecular sieves.

关键词： mesoporous materials

TiO_2-functionalized mesoporous materials for sensitive analysis of multi-phosphopeptides

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Science China Chemistry 2011年第8期54卷 1327-1333页

作者： GUO WeiChao WAN JingJing QIAN Kun YU ChengZhong KONGJiLie YANG PengYuan LIU BaoHong Department of Chemistry and Institute of Biomedical Sciences Fudan University Shanghai 200433 China

Protein phosphorylation as one of the most important post-translational modifications in mammalian cells regulates numerous biological processes. Here we propose a novel strategy for the selective isolation and sensitive analysis of mul- ti-phosphopeptides based on TiO2-gratfed mesoporous materials, in which MCM-41 and SBA-15 were chosen as the hard templates. The commercialized IMAC and TiO2 nanopartices were further investigated in the phosphopeptide analysis for comparison. The enrichment efficiency was evaluated and measured by MALDI-TOF mass spectrometry. The results indicated that both TiO2-SBA-15 and TiO2-MCM-41 exhibited the preferential affinity to multi-phosphopeptides compared with the other two widely used strategies. The mesoporous TiO2 based protocol showed highly selective and sensitive properties, where phosphopepddes could be identified at femtomole.

关键词： TiO2 mesoporous materials multi-phosphopeptides enrichment

Synthesis and Characterization of Novel Layered Lithium Sodium Silicate (Silinaite) and the mesoporous materials from Silinaite

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Chinese Chemical Letters 2006年第4期17卷 525-528页

作者： Chun Hui ZHOU Hong Qiang GUO Hui Jun CAO Xiao Nian LI Zhong Hua GE Jie LI College of Chemical Engineering and materials Science Zhejiang University of Technology Hangzhou 310032

Novel layered silinaite has been synthesized using an aqueous mixture of water glass, LiOH and NaOH under hydrothermal crystallization. Subsequently transformation of silinaite into mesoporous materials （SDM） was achieved at mild condition using cetyltfimethylammonium bromide as structure-directing agents. The resulting samples were characterized by XRD, SEM, FTIR nitrogen adsorption-desorption isotherms and catalytic performance in bulky molecular involved reaction. The results revealed that synthesized mesoporous materials derived from the silinaite exhibited an ordered hexagonal crystal structure with average pore diameter 2.7 nm and BET surface area 817m^2/g. The SDM-supported ZnCl2 catalyst, prepared by impregnationevaporation method, retained the mesoporous structure and showed high selectivity in alkylation of benzene with benzyl chloride.

关键词： Silinaite mesoporous materials layered solid catalysts characterization.

Study on the controllable synthesis of SH-MCM-41 mesoporous materials and their adsorption properties of the La3+, Gd3+and Yb3+

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Chinese Chemical Letters 2019年第12期30卷 2318-2322页

作者： Xiancai Li Tianren Lu Ying Wang Yifeng Yang College of Chemistry Nanchang University

Sulfhydryl MCM-41(SH-MCM-41) mesoporous materials were prepared via a hydrothermal method,and-SH was successfully imported by a post-grafting *** structure and surface properties of the materials were characterized using Fourier Transform infrared spectroscopy,X-ray diffraction and Transmission Electron Microscopy *** low concentrations of La^3+,Gd^3+ and Yb^3+ adsorption on the material were *** paper discusses the effects of system factors,such as pH and the solid-liquid ratio,on the performance of the adsorption *** adsorption thermodynamics and kinetics were also *** results indicated that the materials were in good order and had high specific surface area(956 m^2/g) with an average pore diameter of 2.1 nm;the mercapto groups were successfully grafted onto a molecular sieve,and the best grafted amount was 1.46×10^-3 mol/*** materials showed preferable adsorption of La^3+,Gd^3+ and Yb^3+ with maximum adsorption capacities of560.56 mg/g,467.60 mg/g and 540.68 mg/g,*** adsorption process can be described by the Freundlich isotherm model,and the adsorption data fits pseudo-second-order *** repeating the elution-regeneration cycle four times,the adsorption capacity of rare earth ions was mostly maintained,indicating that the adsorbent can be regenerated well and recycled to save *** has potential in practical application.

关键词： SH-MCM-41 mesoporous materials Adsorption Regeneration Practical application

Titanium-Containing mesoporous materials: Synthesis and Application in Selective Catalytic Oxidation

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Journal of Natural Gas Chemistry 2006年第3期15卷 164-177页

作者： Jie Li Chunhui Zhou Huali Xie Zhonghua Ge Liangcai Yuan Xiaonian Li College of Chemical Engineering and materials Science Zhejiang University of Technology Hangzhou 310014 Zhejiang China

Titanium-containing mesoporous molecular sieves are of great significance in selective catalytic oxidation processes with bulky molecules. Recent researches and developments on the designing and synthesis of Ti-containing mesoporous materials have been reviewed. Various strategies for the preparation of Ti-containing mesoporous materials, such as direct synthesis and post-synthesis, are described. Modifications of Ti-containing mesoporous materials by surface-grafting and atom-planting are also discussed. All approaches aimed mainly at the improving of the stability, the hydrophobicity, and mostly the catalytic activity. Structural and mechanistic features of various synthetic systems are discussed. Ticontaining mesoporous materials in liquid phase catalytic oxidation of organic compounds with H2O2 as an oxidant is briefly summarized, showing their broad utilities for green synthesis of fine chemicals by catalytic oxidative reactions.

关键词： mesoporous materials titanium molecular sieve zeolites characterization catalytic oxidation

Structural Evolvement of Heating Treatment of Mg/AI-LDH and Preparation of Mineral mesoporous materials

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Acta Geologica Sinica(English Edition) 2006年第2期80卷 170-174页

作者： CHEN Tianhu XU Huifang WANG Yifeng QING Chengsong FAN Mingde CHEN Gang School of Natural Resources and Environmental Engineering Hefei University of Technology Hefei Anhui 230009 China Department of Geology and Geophysics University of Wisconsin Madison WI 53706 USA Sandia National Laboratories P.O. Box 5800 Albuquerque New Mexico 87185-0776 USA

Although hydrotalcite, or layered double hydroxides （LDHs）, is not a common mineral, it is an important material that can be easily synthesized in laboratory. In this study, structural evolvement and BET surface area changes of heat treated Mg/AI-LDH is evaluated by XRD, TEM and N2-BET analyses. The results indicate that the magnesium-aluminum LDH with carbonate as interlayer anion, periclase-like oxides was formed at temperatures of 400-800℃. Meanwhile, 2-3 nanometer mesoporous were formed during decomposition of LDH. However, the heat treated samples still preserve the morphology of the original LDH plates. Periclase-like formed from LDH heat treatment may re-hydrolyze and recover the structure of LDH. However, crystallinity of the recovered LDH is lower than that of the original LDH. This heat treatment will result in formation of （Mg, Al）-oxide nano-crystals and nanopores among the nano-crystals. When heating temperature exceeds 1000, the periclase-like （Mg, Al）-oxide is transformed into a composite with periclase （MgO） and spinel phases. The periclase can be re-hydrolyzed and dissolved in HCl solution. After acid treatment, the sample with a high surface area is composed of spinel nano-crystals and nanopores among them. Our results will provide a new and economic way to synthesize mesoporous materials through pathways of phase transformation of precursor materials with different composition.

关键词： hydrotalcite layered double hydroxides mesoporous materials

CATALYTIC CONVERSION OF MUNICIPAL WASTE PLASTIC INTO GASOLINE-RANGE PRODUCTS OVER mesoporous materials

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China Particuology 2006年第2期4卷 80-82页

作者： Jorge Norberto Beltramini ARC Centre for Functional NanomaterialsThe University of Queensland Brisbane Queensland 4072 Australia

In the last 20 years, it has become apparent that waste produced from plastics was becoming an environmental problem because of their low biodegradability. Though several methods have been proposed for recycling waste plastics, it is generally accepted that material recovery is not a long-term solution to the present problem, and that energy or chemical recovery is a more attractive alternative, including cracking into the monomer constituents, combustion to produce energy, and thermal or catalytic conversion to produce useful intermediate chemicals. This paper is a contribution in the area of the last option for energy recovery. There have been a number of publications reporting the use of molecular sieves and amorphous silica-alumina catalysts for the cracking of polymers into a range of hydrocarbons. The research work reported here demonstrates the ability of mesoporous catalysts in cracking polyethyl- ene into gasoline range products. It was found that for mesoporous MCM-41 catalysts, its cracking activity increases with its crystallinity, displaying higher activity with smaller pore diameters. The hydrocarbon product distribution strongly indicates a carbenium ion cracking mechanism. The product distribution was also compared with those obtained from thermal cracking tests.

关键词： waste plastic mesoporous materials polyethylene cracking MCM-41