检索结果-内蒙古大学图书馆

HIERARCHICALLY POROUS STRUCTURED materials AND THEIR ENHANCED CATALYTIC ACTIVE STABILITY

HIERARCHICALLY POROUS STRUCTURED MATERIALS AND THEIR ENHANCE...

10th IUPAC International Conference on Novel materials and their synthesis NMS-X(IUPAC第十届新材料及其合成国际会议)

作者： A.YONG WANG B.WEI GENG C.RU-JIN CHENG D.NAN JIANG E.XIAO-YU YANG F.BAO-LIAN SU Laboratory of Inorganic Materials Chemistry University of Namur (FUNDP)61 Rue de BruxellesB-5 000 NamurBelgium State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122430070 WuhanChina State Key Laboratory of Advanced Technology for Material Synthesis and ProcessingWuhan University of TechnologyLuoshi Road 122430070 WuhanChina

As a hot topic in recent years, hierarchically porous structured materials have received plenty of attentions and lots of work has been done on their synthesis. For their outstanding properties, hierarchically porous structured materials have attractively potential applications in catalysis, controlled release, biomedicine, separation science and energy. We have synthesized several micro-meso-macro hierarchically porous structured materials through different methods. Except for some general characteristics of porous structured materials, these materials possess some common superiorities, and the highlight is that they have highly interconnected network of well-defined macropores with uniform mesoporosity and zeolitic micro-channels which can lead to highly active sites, larger external surface areas and fast diffusion of species. We applied these hierarchically porous structured materials to catalysis by encapsulating active species into macropores, such as enzymes,metallic oxide nanoparticles and metallic ion, which exhibite high catalytic activity, long-term stability, and excellent recycling behaviour. Hierarchically porous structured materials applied to catalysis are obviously more attractive and promising than tradition catalysts. What's more, other advanced properties can be exploited in the design of magnetic devices, sensors, and biofuel cell etc. which are based on hierarchically porous structured materials.

关键词： micro-meso-macro porous materials catalyst long-term stability

来源：评论

学校读者我要写书评

暂无评论

Degradable PRGD/PDLLA/β-TCP/NGF composites promote differentiation and regulate gene expression in rat pheochromocytoma cells

引用

Chinese Science Bulletin 2013年第24期58卷 2979-2983页

作者： QIU Tong YU Chang YAN QiongJiao LI ShiPu Biomedical Materials and Engineering Center Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

In this study, we synthesized degradable PRGD/PDLLA/β-TCP/NGF composites to facilitate neuronal repair. To this end, we (1) examined the release of nerve growth factor (NGF) from the composites, (2) evaluated the differentiation status of the cells and (3) address how transcriptional activity may regulate the differentiation mechanism of these cells. NGF content was determined using enzyme-linked immunosorbent assay, while the cellular mRNA expression was examined by real-time PCR analysis. Our results indicated that NGF release was robust during the first 10 days and then stabilized at a lower level thereafter. Treatment of PC12 cells with the extract of the NGF-embedded composites induced the formation of neurites and, in some cases, net-like neurites. Analysis of the expression level of differentiation-related genes, such as TrkA, VGF, Rab1, GAP43 and β-tubulin Ⅱ, were significantly up-regulated. These findings suggest that these composites might be a suitable delivery system for growth factors like NGF that can be used to facilitate neuronal repair after injury.

关键词：细胞分化复合材料 PDLLA 基因表达合成降解嗜铬细胞瘤神经生长因子神经元损伤

来源：评论

学校读者我要写书评

暂无评论

SC-IrO_2 NR-carbon hybrid:A catalyst with high electrochemical stability for oxygen reduction

引用

Science China Chemistry 2013年第1期56卷 131-136页

作者： WANG GuangJin CHENG Feng YU Yi LIANG Cong XU Tian PAN Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Provincial Key Laboratory of Fuel Cell

The enhanced electrochemical stability of the synthesized hybrid catalyst has been demonstrated by the introduction of the synergistic effect between carbon powder additive and the prepared *** crystal IrO 2 nanorod (SC-IrO 2 NR) catalyst was prepared by a sol-gel *** structure and performance of the catalyst sample were characterized by X-ray diffraction spectroscopy (XRD),scanning electron microscope (SEM),transmission electron microscope (TEM),rotating disk electrode (RDE) and cyclic voltammetry (CV) *** patterns and TEM images indicate that the catalyst sample has a rutile IrO 2 single crystal nanorod *** onset potential for oxygen reduction reaction (ORR) of the SC-IrO 2 NR-carbon hybrid catalyst specimen is 0.75 V (***) in RDE *** and RDE test results show that the SC-IrO 2 NR-carbon hybrid catalyst has a better electrochemical stability in comparison with the commercial Pt/C catalyst,with attenuation ratios of 17.67% and 44.60% for the SC-IrO 2 NR-carbon hybrid catalyst and the commercial Pt/C catalyst after 1500 cycles,***,in terms of stability,the SC-IrO 2 NR-carbon hybrid catalyst has a promising potential in the application of the proton exchange membrane fuel cell.

关键词： single crystal nanorods IrO 2 electrochemical stability oxygen reduction reaction

来源：评论

学校读者我要写书评

暂无评论

Photokatalysatoren auf Graphenbasis für die Produktion von Solarbrennstoffen

引用

Angewandte Chemie 2015年第39期127卷

作者： Quanjun Xiang Bei Cheng Jiaguo Yu College of Resources and Environment Huazhong Agricultural University Wuhan 430070 (China) State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 (China) Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 (Saudi‐Arabien) http://***/rid/G‐4317‐2010

Aufgrund des zunehmenden Energiebedarfs und wachsender Umweltprobleme erfahren die Produktion von Solarbrennstoffen durch photokatalytische Wasserspaltung und die CO 2 ‐Reduktion mithilfe von Photokatalysatoren beträchtliches Interesse. In den letzten Jahren haben zahlreiche Studien gezeigt, dass die Effizienz der Photokatalysatoren für die Produktion von Solarbrennstoffen deutlich gesteigert werden kann, wenn man Graphen verwendet, das eine besondere konjugierte 2D‐Struktur und spezielle elektronischen Eigenschaften besitzt. Dieser Aufsatz gibt einen Überblick über jüngste Fortschritte bei der Anwendung von Photokatalysatoren auf Graphenbasis für die Produktion von Solarbrennstoffen einschließlich der CO 2 ‐Reduktion zu Kohlenwasserstoffen und der H 2 ‐Erzeugung mittels Wasserspaltung. Die Grundlagen der Wasserspaltung und der CO 2 ‐Reduktion werden kurz dargestellt. Die für die Verbesserung der photokatalytischen Leistung relevanten Funktionen des Graphens werden diskutiert. Mit Blick auf bestehende Herausforderungen und Möglichkeiten auf diesem vielversprechenden Gebiet werden schließlich mögliche Perspektiven erörtert.

关键词： CO2‐Reduktion Graphen Photokatalyse Solarbrennstoffe Wasserstofferzeugung

来源：评论

学校读者我要写书评

暂无评论

Preparation of TiO_(2)-rich Ba-Ti-O thick films by laser chemical vapor deposition method

引用

Journal of advanced Ceramics 2013年第2期2卷 167-172页

作者： Dongyun GUO Akihiko ITO Takashi GOTO Rong TU Chuanbin WANG Qiang SHEN Lianmeng ZHANG State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Institute for Materials Research Tohoku UniversitySendai 980-8577Japan

TiO_(2)-rich Ba-Ti-O films were prepared on Pt/Ti/SiO_(2)/Si substrate by laser chemical vapor deposition(LCVD).Their phase relationship and microstructure were *** single-phase BaTi_(2)O_(5),Ba_(4)Ti_(13)O_(3)0 and BaTi_(5)O_(11) films were prepared at Ti/Ba molar ratios m_(Ti/Ba)=1.84-1.90,2.83 and 4.49-4.55,*** high deposition rate of TiO_(2)-rich Ba-Ti-O films ranged from 54.0μm/h to 177.6μm/*** permittivity of BaTi_(2)O_(5)film(prepared at m_(Ti/Ba)=1.84 and deposition temperature T_(dep)=877 K),Ba_(4)Ti_(13)O_(3)0 film(prepared at m_(Ti/Ba)=2.83 and T_(dep)=914 K)and BaTi5O11 film(prepared at m_(Ti/Ba)=4.49 and T_(dep)=955 K)were 50,40 and 21,respectively.

关键词： laser chemical vapor deposition(LCVD) TiO_(2)-rich Ba-Ti-O film microstructure deposition temperature dielectric properties

来源：评论

学校读者我要写书评

暂无评论

One-pot fabrication of FePt/reduced graphene oxide composites as highly active and stable electrocatalysts for the oxygen reduction reaction

引用

Carbon 2014年 68卷 755-762页

作者： Dan Chen Xin Zhao Shanshan Chen Huifeng Li Xinning Fu Qingzhi Wu Shipu Li Yu Li Bao-Lian Su Rodney S. Ruoff State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Biomedical Material and Engineering Center Wuhan University of Technology Wuhan 430070 China Department of Mechanical Engineering and the Materials Science and Engineering Program The University of Texas at Austin 1 University Station C2200 Austin TX 78712 USA Laboratory of Inorganic Materials Chemistry University of Namur 61 rue de Bruxelles B-5000 Namur Belgium Clare Hall College University of Cambridge Cambridge UK

FePt nanoparticles (NPs)/reduced graphene oxide (rG-O) composites have been synthesized using a one-pot strategy without surfactants. Monodisperse FePt NPs were homogenously loaded onto rG-O sheets. By controlling the concentration of dispersed graphene oxide (GO), uniform FePt flower-like nanoclusters can be obtained. FePt/rG-O composites exhibited exceptionally high electrocatalytic performance in the activity and durability for the oxygen reduction reaction (ORR), much superior to that of the commercial Pt/C (60%). The straightforward synthesis of FePt/rG-O composites provides a low-cost and high performance catalyst for the ORR, which is also a promising strategy for the synthesis of various Pt-based bimetallic alloy/rG-O composites for potential uses in catalysis and energy fields.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Preparation of rutile TiO_(2) thin films by laser chemical vapor deposition method

引用

Journal of advanced Ceramics 2013年第2期2卷 162-166页

TiO_(2) thin films were prepared on Pt/Ti/SiO_(2)/Si substrate by laser chemical vapor deposition(LCVD)*** effects of laser power(P_(L))and total pressure(p_(tot))on the microstructure of TiO_(2) thin films were *** deposition temperature(T_(dep))was mainly affected by P_(L),increasing with P_(L) *** single-phase rutile TiO_(2) thin films with different morphologies were *** morphologies of TiO_(2) thin films were classified into three typical types,including the powdery,Wulff-shaped and granular microstructures.p_(tot) and T_(dep) were the two critical factors that could be effectively used for controlling the morphology of the films.

关键词： rutile TiO_(2)thin film laser chemical vapor deposition(LCVD) laser power total pressure microstructure

来源：评论

学校读者我要写书评

暂无评论

Fast and simple fabrication of RGO/Ag nanocomposite with homogenous dispersion

引用

2013 3rd International Conference on Mechanical Science and Engineering, ICMSE 2013

作者： Jiang, Xiao Juan Luo, Guo Qiang Li, Mei Juan Shen, Qiang Zhang, Lian Meng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9783037857120

The RGO/Ag nanocomposite with a homogeneous dispersion of Ag on the surface of RGO has been successfully prepared via situ chemical reduction method using DMF (dimethylformamide) as solvent and reducing agent. The RGO/Ag nanocomposite was characterized by X-ray diffractometer (XRD), Fourier transform-infrared (FTIR) spectra, Fieldemission scanning electron microscope (FESEM) and transmission electron microscope (TEM). It is suggested that in the presence of the PVP (polyvinylpyrrolidone), the electrostatic attraction of Ag+ ions with negative GO sheets lead to the decoration of Ag nanoparticles on the surface of RGO sheets in RGO/Ag nanocomposite. © (2013) Trans Tech Publications, Switzerland.

关键词： Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

synthesis of Cu Nano-particle in Toluene Used for Conductive Ink with a Binder of Polyurethane

引用

Journal of Wuhan University of technology(materials Science) 2013年第6期28卷 1246-1250页

作者： LI Song LIU Peng WANG Qisui CHEN Xia XIAO Jing Department of Logistics Automation School of Logistics EngineeringWuhan University of Technology Department of Chemistry School of SciencesWuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Copper nanoparticles with a size of about 150 nm were prepared in toluene using oleic acid as protecting agent. The nanoparticles were used to prepare conductive Cu ink with a polyurethane binder. Oleic acid was used to prevent the nanoparticles from oxidization and agglomeration. The prepared Cu nanoparticles were characterized by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The resistivity of the copper film on glass substrate that was prepared using Cu nanoparticle ink reached about 1.5× 10-4 2. cm-1 after it was annealed to 120 ~C. Both the nanoparticle ink and the films were characterized by XRD, fourier transform infrared （FT-IR）, and the thermogravimetry-differential scanning calorimetry instrument （TG- DSC）.

关键词： copper nanoparticles oleic acid toluene conductive ink copper film

来源：评论

学校读者我要写书评

暂无评论

Solvent-free synthesis of Flowable Carbon Clusters with Customizable Size and Tunable Optical Performance

引用

Chinese Journal of Chemistry 2013年第12期31卷 1513-1518页

作者： Denian Li Qi Li Xuan Hu Jing Huang Hairong Li Lijie Dong HaJan Xie Chuanxi Xiong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materiah' Science and Engineering Wuhan University of Technology Wuhan Hubei 430070 China School of Materials Science and Engineering Wuhan Textile University Wuhan Hubei 430073 China

We propose a rapid and solvent-flee route for synthesizing luminous carbon clusters by controlling carbonization of polyethylene glycol （PEG）. This approach does not involve solvents yet uses the precursor itself as suspend- ing medium, thus features mild and green chemistry, and also enables the formation of uniform-sized carbon clus- ters, of which the diameter can be easily tuned from 0.7 to 3.5 nm via control of reaction time. In term of the di- mension, the resultants are denoted as sub-nano carbon clusters （SNCs） and carbon dots （CDs）, respectively. Bene- fiting from surface anchored PEG segments, both of the two show favorable flowability at room temperature and excellent solubility in aqueous and organic solvents. Comparison of their optical performances and structures re- veals that they share the same chromophores. Particularly, the SNCs demonstrate robust photo- and pH-stable pho- toluminescence and can be directly applied to cell-imaging regarding to its prominent biocompatibility. Moreover, its quantum yield （5.5%）, which is approximately 3 times higher than that of CDs （1.5%）, can be dramatically en- hanced to 18.8% by facile chemical reduction. We anticipate that these PEG derivatives marked with easy synthesis, controllable optical performances and excellent physical properties will be highly appealing in future applications.

关键词： solvent-free synthesis carbon clusters customizable size fluorescence

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：