29 research outputs found
preparationofnaturalzeolitetemplatedcarbonanditsnanoporeformationmechanism
Porous carbons were prepared using zeolite ore and artificial type X zeolite as templates, and sucrose as carbon source. Field-emission scanning electron microscopy and nitrogen adsorption analysis were employed to study the morphologies and pore structure of the samples. Results indicate that the BET specific surface area of zeolite ore templated porous carbon (1070m(2)/g) is lower than that of type X zeolite templated porous carbon (1820 m(2)/g) while the total pore volume (1.39 cm(3)/g) and mesopore. volume (0.98 cm(3)/g) of porous carbon obtained using zeolite ore as the template are much larger than that of porous carbon obtained by using type X zeolite as the template, which are 1.02 cm(3)/g and 0.39 cm(3)/g respectively. The nanopores of natural zeolite templated porous carbon are composed of three kinds of pores: one is formed by removal of ore which means "templated pores", the second is inherited from template pores which we call "hereditary pores" and the third is formed during carbonization
工艺参数对天然沸石模板多孔炭结构的影响
以内蒙古赤峰市的天然沸石矿为模板,以蔗糖为炭的前驱体,制备了具有较窄中孔孔径分布的模板多孔炭。利用SEM、XRD及N2吸附等方法对模板炭进行了表征。采用BJH法分析了模板炭的孔径分布特征。研究了制备工艺中催化剂H2SO4的用量和炭化温度对所得模板多孔炭结构的影响。结果表明,硫酸用量和炭化温度对模板多孔炭的表面形貌、微晶结构和孔结构都有一定的影响。催化剂H2SO4用量过多时模板炭表面结构粗糙、致密,杂质较多,比表面积和总孔容较小;炭化温度越高,模板炭的结构收缩越严重,总孔容和中孔孔容越大,中孔率越高
工艺参数对天然沸石模板多孔炭结构的影响
以内蒙古赤峰市的天然沸石矿为模板,以蔗糖为炭的前驱体,制备了具有较窄中孔孔径分布的模板多孔炭。利用SEM、XRD及N2吸附等方法对模板炭进行了表征。采用BJH法分析了模板炭的孔径分布特征。研究了制备工艺中催化剂H2SO4的用量和炭化温度对所得模板多孔炭结构的影响。结果表明,硫酸用量和炭化温度对模板多孔炭的表面形貌、微晶结构和孔结构都有一定的影响。催化剂H2SO4用量过多时模板炭表面结构粗糙、致密,杂质较多,比表面积和总孔容较小;炭化温度越高,模板炭的结构收缩越严重,总孔容和中孔孔容越大,中孔率越高
铸型炭化法制备多孔炭材料的研究进展
铸型炭化法开辟了多孔炭材料制备研究的一个全新领域,近年来已成为能够最有效控制多孔炭材料结构的方法。本文概述了传统方法制备多孔炭材料的不足,重点综述了以硅胶、黏土、沸石和中孔硅分子筛为铸型制备多孔炭材料的最新研究进展,展望了铸型炭的应用前景,最后指出了铸型炭化法在制备多孔炭领域尚待开展的研究工作
工艺参数对天然沸石模板多孔炭结构的影响
以内蒙古赤峰市的天然沸石矿为模板,以蔗糖为炭的前驱体,制备了具有较窄中孔孔径分布的模板多孔炭。利用SEM、XRD及N2吸附等方法对模板炭进行了表征。采用BJH法分析了模板炭的孔径分布特征。研究了制备工艺中催化剂H2SO4的用量和炭化温度对所得模板多孔炭结构的影响。结果表明,硫酸用量和炭化温度对模板多孔炭的表面形貌、微晶结构和孔结构都有一定的影响。催化剂H2SO4用量过多时模板炭表面结构粗糙、致密,杂质较多,比表面积和总孔容较小;炭化温度越高,模板炭的结构收缩越严重,总孔容和中孔孔容越大,中孔率越高
利用LIBS测量煤油空气局部当量比的初步探索
发展了一种采用激光诱导等离子体击穿光谱(LIBS)技术定量测量燃料/空气混合气中局部当量比的激光诊断方法。在解决液体煤油完全雾化、冷凝等问题后,以在线测量时的实验条件为依据,确定了不同气压下煤油/空气混合气体中燃料和空气当量比数值与LIBS中的H/O和H/N原子发射光谱相对强度之间的对应关系,以及氢原子发射谱线宽度对压力的依赖关系,为下一步在线定量测
平行农业:迈向智慧农业的智能技术
农业生产具有很强的不确定性、多样性、复杂性,其经营效益与自然条件、国家政策、市场环境息息相关。互联网时代的到来,给农业生产带来了新的挑战和机遇。总的来说,智慧农业是指利用信息技术,对农业生产—经营—管理—服务全产业链进行智能化控制,实现农业生产的优质、高效、安全和可控。在略述当前智慧农业信息感知、智能决策和决策实施三方面技术现状的基础之上,提出实现智慧农业智能决策之平行农业技术,以及如何以人工系统实现描述智能、以计算实验实现预测智能、以平行执行实现引导智能,并提出与农业企业资源计划、农业生产执行系统、农业生产过程控制系统相结合的构想。在当今大力发展农业规模化生产的背景下,为发展工业化的农业生产和经营提供了思路
基于区块链技术的透明农场
随着新型农业经营模式的发展,消费者可远程对种植者提出种植要求,从而满足其对高品质农产品的需求。农业供应链的利益相关者除了包括消费者和种植者,还包括农场经营者、农资提供方、农技提供方以及第三方监管和金融服务方等。如何构建诚信社区,保障各方利益,实现可持续发展,是一二三产业融合的新型农业模式需要解决的课题。对于有多种利益相关者的农场经营模式,智能合约提供了一种信用保障机制,因此提出了基于智能合约的线上农场平台框架,以区块链技术构建一个与线下相对应的可信任透明社区。与传统的溯源系统不同,该平台利用数据的去中心化管理、不可篡改的特点,通过不同数据的相互校验保证数据的真实性,增加数据作假的成本,从而达到构建可信任农业社区的目的,以期为保障互联网农业的数据有效性、新型农业经营模式的有序发展提供支持和保障
Visualization of the interaction between tris and lysozyme with a biosensor based on total internal reflection imaging ellipsometry
Weak affinity interactions among biomolecules have attracted more and more attentions for they play a significant role in organisms. However it is difficult to characterize these interactions due to the limitation of the detection approaches. The biosensor based on total internal reflection imaging ellipsometry is a real-time analysis method for biomolecular interaction detection with the advantages of high throughput and sensitivity. The interaction between tris and lysozyme a typical example of weak affinity interactions has been detected with TIRIE as a trial. Tris is immobilized on the gold thin film substrate to form the biosensing surface and then LZM as well as its negative controls is delivered to the tris-immobilized surface. The interaction process between tris and LZM is recorded by TIRIE biosensor to forma real-time curve and its dissociation constant is deduced as 7.6 x 10 M which is in agreement with the results in the reported work by other investigators. The results indicate that TIRIE biosensor is competent for weak affinity interaction analysis. 2014 Elsevier B.V. All rights reserved
