碳纸负载钴氧化物的制备及电催化析氧性能研究

高效且廉价的电催化析氧反应（OER）电极材料的制备对其在电化学能源转化和储存系统中的应用具有重要的研究意义。通过溶剂热法和不同气氛焙烧,分别制得碳纤维纸（碳纸）负载的两种钴氧化物（一氧化钴和四氧化三钴）,并将其用作OER电极的催化剂。运用X射线衍射仪（XRD）、场发射扫描电镜（FESEM）和X射线光电子能谱（XPS）技术分别对两种材料的物相、形貌和表面价态进行了表征及分析。结果表明：在氮气气氛下焙烧得到一氧化钴纳米片,而在空气下焙烧得到四氧化三钴纳米片。通过线性扫描伏安法（LSV）、循环伏安曲线（CV）、电化学交流阻抗测试（EIS）和计时电位法对两种材料的电催化析氧性能进行了研究。结果表明：一氧化钴电极比四氧化三钴电极具有更优异的析氧反应催化活性和稳定性。在1 mol/L 氢氧化钾电解液中,一氧化钴和四氧化三钴电极在10 mA/cm ²电流密度下对应的电位分别为1.568 V和1.617 V。     

Development of g-C3N4/BiVO4 Binary Component Heterojunction as an Advanced Visible Light-Responded Photocatalyst for Polluted Antibiotics Degradation

Topics in Catalysis - g-C3N4/BiVO4, binary component heterojunction materials, were successfully synthesized for novel photocatalytic tetracycline (TC) decomposition. In the prepared binary...     

A Nanosilver Embedded Graphite-C Shell Coating on Large Size Micro Silicon Formed by Low Temperature Carbonizing with Ag+ Increased the Cross-Linking of Alginate as an Anode for LIBs

Silicon - Silicon (Si) is an aussichtsreich anode candidate for a new generation lithium-ion batteries on account of its enormous theoretical capacity. However, its progress is tremendously...     

丙烯酸接枝聚丙烯的制备及其结构与性能

综述近年来国内外关于丙烯酸接枝聚丙烯(PP—g—AA)的制备方法,主要包括熔融接枝、固相接枝、辐射接枝、光引发接枝、悬浮接枝、溶液接枝和复合材料中的原位接枝法等,以及各种制备工艺和条件对接枝率的影响;并对PP—g—AA的结构与性能尤其是接枝丙烯酸后聚丙烯的结晶与熔融行为进行了详细阐述。     

新型保温建筑涂料用微胶囊仿瓷乳液的制备

采用微胶囊技术制备空囊材料,以减少材料的导热性能,从而达到保温、节能降耗和提高材料性能的目的.以三聚氰胺为壁材,空气(或二氧化碳气体)为芯材,司盘-60为乳化剂,采用锐孔法和乳化缩聚技术制备涂料用微胶囊仿瓷乳液.以涂料用微胶囊的外形、粒径大小,涂料用微胶囊仿瓷乳液稳定性、导热系数为评价指标,对涂料用微胶囊仿瓷乳液制备方...     

陶瓷行业生产管理及成本核算信息化的曙光

介绍了我公司为广东某陶瓷公司开发的陶瓷行业生产管理及成本核算管理信息系统。对建筑陶瓷企业利用先进的管理思想,信息管理手段对陶瓷企业加强生产成本、采购、仓储、销售市场、生产计划平衡等方面的管理。旨在降低陶瓷企业的内部生产、管理成本和外部市场交易成本,从而提高陶瓷企业的整体经营管理水平,增强陶瓷企业的核心竞争力,增加企业的盈利;使企业管理者对生产过程了解更透彻,指挥、决策更科学合理,减少决策失误,规避经营风险。     

Design and implementation of a Petri net based toolkit for Adatasking analysis

The use of Petri nets for defining a general static analysis framework for Ada tasking is advocated. The framework has evolved into a collection of tools that have proven to be a very valuable platform for experimental research. The design and implementation of tools that make up the tasking-oriented toolkit for the Ada language (TOTAL) are defined and discussed. Modeling and query/analysis methods and tools are discussed. Example Ada tasking programs are used to demonstrate the utility of each tool individually as well as the way the tools integrate. TOTAL is divided into two major subsystems, the front-end translator subsystem (FETS) and the back-end information display subsystem (BIDS). Three component tools that make up FETS are defined. Examples demonstrate the way these tools integrate in order to perform the translation of Ada source to Petri-net format. The BIDS subsystem and, in particular, the use of tools and techniques to support user-directed, but transparent, searches of Ada-net reachability graphs are discussed     

Significance of vessel count and vascular endothelial growth factor and its receptor (KDR) in intestinal-type gastric cancer

Angiogenesis is essential for tumor growth and metastasis and depends on the production of angiogenic factors by host and/or tumor cells. The role of angiogenesis and angiogenic factor expression in intestinal- and diffuse-type gastric cancer are undefined. Archival specimens of 51 intestinal-type and 38 diffuse-type human gastric carcinomas were examined for tumor vessel counts, angiogenic factor expression, and the presence or absence of angiogenic factor receptors on tumor endothelium using antibodies against vascular endothelial growth factor (VEGF) and its receptors (KDR and flt-1), basic fibroblast growth factor (bFGF) and its receptors (bek and flg), and factor VIII (endothelial cells). Vessel count and VEGF and bFGF expression were higher in intestinal-type than in diffuse-type gastric cancers (P = 0.01, P < 0.001, and P < 0.001, respectively). Similarly, vessel count and VEGF expression were higher in patients with liver metastasis than in patients with peritoneal dissemination (P = 0.003 and P = 0.01, respectively). Vessel count correlated with VEGF expression and the presence of endothelial KDR in intestinal-type gastric cancer (P = 0.003 and P = 0.02, respectively) but not diffuse-type gastric cancer. Vessel count, VEGF expression, and presence of endothelial KDR increased with increasing stage of disease in intestinal-type gastric cancer but not diffuse-type gastric cancer. The expression of bFGF and its receptors did not correlate with vessel count in either cancer type. These findings suggest that the pattern of metastasis in intestinal-type gastric cancer is angiogenesis dependent. The correlation of VEGF expression and its endothelial receptor with vessel count and stage of disease suggests that VEGF is at least one of the factors responsible for the induction of angiogenesis in intestinal-type gastric cancer.     

New narrow bandgap polymers containing 10-(4-((2-ethylhexyl)oxy)phenyl)-10H-phenothiazine/phenoxazine and 3,6-di(2-thienyl)pyrrolo[3,4-c]pyrrole-1,4-dione)-based units: synthesis and photovoltaic properties

Diketopyrrolopyrrole (DPP) is one of the most used moieties in D–A conjugated polymers for high-performance π-extended conjugated polymer-based organic solar cells. The combination of 1,4-diketo-3,6-dithienylpyrrolo[3,4-c]pyrroles (DTDPPs) and the donor moieties 10-(4-((2-ethylhexyl)oxy)phenyl)-10H-phenothiazine (M₁), 10-(4-((2-ethylhexyl)oxy)phenyl)-10H-phenoxazine (M₂), has not been reported yet. In this report, novel low-bandgap D–A conjugated polymer derivatives including DTDPP, phenothiazine and phenoxazine were successfully synthesized via direct (hetero) arylation polymerization with in the yields of 40.94–60.77%. The obtained D–A conjugated polymers named poly(3,6-Di(2-thienyl)pyrrolo[3,4-c]pyrrole-1,4-dione)-alt-(10-(4-((2-ethylhexyl)oxy) phenyl)-10H-phenothiazine) (P₁) and poly(3,6-Di(2-thienyl)pyrrolo[3,4-c]pyrrole-1,4-dione)-alt-(10-(4-((2-ethylhexyl)oxy) phenyl)-10H-phenoxazine) (P₂) exhibited a wide range of absorption spectrum in visible light region and have a low bandgaps of 1.4–1.5 eV, as well as thermal stabilities, these D–A conjugated polymers are very promising as activated polymeric materials for organic solar cells (OSCs).