NiCoO2 nanoclusters were prepared by soft template based on sodium dodecyl sulfate(SDS)and direct oil bath method for enzyme-free glucose sensors.The performance of NiCoO2 nanoclusters on the electrocatalytic oxidation of glucose was studied.The results show that the sensing electrode based on NiCoO2 nanoclusters has 1278 μA·(mM)-1·cm-2 and a detection limit of 1.8 μM within a linear range of 0.001～5 mM.In addition,the sensor has excellent performance in selectivity,stability,and reproducibility,and has a promising application prospect in blood glu-cose detection.
The thermodynamic analysis of the methanol steam reforming hydrogen production process by electromagnetic induction heating was carried out,and the energy consumption was compared with that of the conventional heating method.The results show that the temperature has a relatively large influence on the reaction process,and when the temperature is low(150～200℃),the methanol conversion rate changes drastically with the rise of pressure,and at temperatures higher than 200℃,the pressure has almost no effect on the methanol conversion rate,and the higher the temperature is,the lower the effect of pressure on the hydrogen production rate is.The proportion of CO in carbon compounds in the product decreased with the increase of S/C at high temperature.The induction-heated reactor with a grid-connected system for renewable power generation reduces CO2 emissions and saves conventional fossil energy,while the energy efficiency of the reforming-to-hydrogen process by induction heating is comparable to that of conventional heating.
The Napa lake, located in the middle of the transverse mountain range in northwest Yunnan, is influenced by the Indian Ocean monsoon and plateau monsoon, and its climate is complex and changeable. It is an ideal area to study the coupling of southwest monsoon and East Asian monsoon. In this paper, the palaeoclimate of strata above 6.35 m in Napa lake, Shangri-la, Yunnan province was studied from phytologist perspective, and a series of environmental and climatic information was obtained. Combined with AMS14C dating, the palaeoclimate environmental process in the study area was reconstructed in the last 17 Ka, and its variation law and influencing factors were discussed. The analysis results show that the climate of Napa lake since17 800 has experienced slants cold dry-warm-damp and hot-warm-damp and hot-cold from the dry process, because of the influence of the local climate and terrain effect, Shangri-la Napa lake, in the early holocene climate record is a reflection of the implanted silicon body and other parts of the different indexes by reconstruction exist obvious differences in climate.
水合物法回收混空煤层气中的甲烷具有清洁高效和操作安全的优势.为了探究四丁基溴化铵(TBAB)和辛基-β-D-吡喃葡萄糖苷(OGP)两种促进剂的协同作用,完成了TBAB+OGP复配溶液中甲烷水的合物相平衡实验.结果表明,TBAB显著降低了甲烷水合物的生成压力,但是OGP的引入减弱了TBAB的热力学促进作用.其削弱作用随着OGP和TBAB浓度的增加而增加,随着温度的升高而降低.该研究为水合物法回收煤层气提供基础实验数据并指导后续的方案设计.
本文针对航空航天对于轻质高刚性夹层结构的需求,开展了轻质环氧树脂基复合芯材膜的制备工艺研究与性能表征.采用熔融共混方法制备了新型轻质高刚性环氧树脂基体,采用热熔法制备了轻质环氧树脂基复合芯材膜,并对其进行了工艺性能、微观结构和典型力学性能的表征.结果表明,本文制备的轻质环氧树脂基复合芯材膜空心微腔结构保持良好,内部质量良好,固化后轻质复合材料密度降低到0.63g/cm3,典型力学性能达到国际先进水平,具有良好的工程应用前景.
