一种制备石墨烯的液相等离子体方法

正申请公布号:CN 107459031A申请公布日:2017.12.12申请人:南京理工大学摘要本发明公开了一种制备石墨烯的液相等离子体方法。相较于氧化还原法、碳化硅外延生长等传统石墨烯制备方法,液相等离子体法具有设备简单,制备成本较低等优点。本发明采用高电压低电流的工作模式,将电压设置为     

光谱检测技术进军手机市场:成分/真伪一扫便知

正由于光谱技术可以在不破坏样品的条件下检测出待测物的成分,光谱仪一直是许多物质分析实验室必备的基本仪器之一。而传统光谱检测仪为了尽可能从更大的波长范围内取得物质的红外线波长特征,因此其光机系统设计相对复杂,设备尺寸很难缩小。针对上述问题,德州仪器(TI)已利用其所发明的数位光源处理技术(DLP)大幅改良了光谱仪的光机设计,让光谱仪变成可以放在口袋里的小型仪器,成本大幅降低。另一家类     

4－硝基邻苯二甲酸根桥联双核钴(Ⅱ)配合物的合成、磁性及抗癌活性

研究桥联多核配合物的磁性不仅有助于了解桥联多核配合物在生物体内所起的各种生物功能,而且可为分子铁磁体的设计和合成提供信息.某些过渡金属配合物已显示了体外抗艾滋病和抗癌活性,有关桥联多核配合物在这方面的研究甚少.     

东南大学传感网技术研究中心落成

不久前,东南大学传感网技术研究中心大楼在新区落成。与此同时,东南大学分别与江南计算技术研究所、华润微电子有限公司签订了合作框架协议;“传感网技术教育部工程研究中心”、“江苏省传感网技术重点实验室”、“东南大学——中讯物联平安家居联合研发中心”和“东南大学——上华功率集成技术联合实验室”同时揭牌。江苏省委常委、无锡市委书记杨卫泽,东南大学校长易红,无锡市领导许刚、谈学明,无锡市委秘书长沈建出席仪式。     

氧和碳酸根桥联的双核铁(Ⅲ)配合物的合成、结构和光谱研究

氧桥联的双核铁配合物一直是无机化学工作者十分感兴趣的研究课题 .近年来 ,由于在生物体内发现多种金属蛋白和金属酶的活性中心存在氧和羧酸根桥联的双核铁结构单元 ,如蚯蚓血红蛋白 [1]、甲烷单加氧酶 [2 ]、核糖核酸还原酶 [3]、饱和脂肪酸还原酶 [4 ]和紫色酸性磷酸酶 [5]等 ,使得对氧桥联的双核铁配合物的研究成为当前生物无机化学研究中的热点之一[6] .为进一步了解氧桥联的双核铁配合物的物理化学性质 ,我们在系统研究的基础上 ,合成了一个新的氧和碳酸根桥联的双核铁配合物 ,测定了其晶体结构 ,研究了其电子吸收光谱 .1　实验部分1 …     

微生物发酵诱导多孔材料: 制备方法和应用

微生物发酵作为一种新的制备多孔材料的方式, 将微生物发酵工程与发泡工程有机结合起来, 克服了传统制备方法需要特殊设备、 操作复杂、 后处理繁琐、 化学药品污染和成本昂贵等缺点, 受到了广泛关注.本文基于微生物发酵多孔材料的研究, 围绕多孔材料的定义和多孔水凝胶的分类及制备方式进行总结.针对微生物发酵诱导制备多孔材料的制备方法, 综合评述了该方法在染料吸附、 海水蒸发脱盐、 电磁屏蔽以及制备新型功能性生物材料等方面的应用.最后, 对微生物诱导制备多孔材料的未来发展进行了展望.     

热带震害研究——以雷琼热带区为例

本文以雷琼热带区为例,在详细的剖面研究基础上,通过对样品的化学分析,土力学和岩石力学试验、计算,综合得出热带地区若干在强震时易于产生滑塌的风化壳及主要影响因素。     

有机膦功能化联咪唑的合成与表征

从N,N’-二烷基酯联咪唑出发,经过还原、氯代、亲核取代反应,合成了N,N’-二烷基膦联咪唑.产物经过了红外、核磁共振及质谱表征.反应前体N,N’-二醇联咪唑和N,N’-二烷基氯联咪唑可作为起始物,合成得到一系列联咪唑衍生物.     

岩爆特征及岩体结构效应

本文论述了中国南盘江天生桥大型水电站引水隧洞中的岩爆特征及岩爆岩体结构效应。指出岩体结构对岩爆的发生和岩爆烈度具有控制作用,并结合岩爆岩石力学试验,提出了岩爆岩体结构效应理论。对于正确选择地下工程场地、调整优化洞室轴线方位和岩爆预报具有实用价值。     

氰酸根桥联双核铜配合物磁构效关系的密度泛函研究

在密度泛函理论的框架下,采用对称性破损态方法,以{Cu2(C2H4N2)2(N, N-μ-NCO)2}2+为模型化合物,研究氰酸根EO方式桥联双核铜配合物的磁构效关系,进一步证实了通过CuNCu间的三中心d-p-dσ反键的超交换作用与磁偶合构效关系的本质联系. 计算了氰酸根桥联配合物磁交换偶合常数J与桥联角θ的关系,并与叠氮酸桥联配合物进行了比较.     

化学化工虚拟仿真实验教学平台的建设与应用

Virtual simulation teaching is a new type of teaching mode in recent years, which is a fusion of multiple disciplines, multiple regions and multi-level laboratory teaching methods. Taking virtual simulation experiment platform construction of chemical engineering in Tianjin University as an example, this paper introduces the chemical safety knowledge, the integration of theoretical knowledge, the experimental content, the specific content of virtual simulation resources, and the characteristic of virtual simulation experiment platform. This platform provides a new model of efficient combination of virtual simulation resources and traditional teaching resources, which promotes the development of chemical laboratory teaching.     

Heavy element chemistry facilities at Texas A&M University

A new program to study the chemistry of the homologs of the transactinide elements is under development, and is centered at the Texas A&M University Cyclotron Institute. New facilities have been designed and/or implemented to enable this research. These include equipment for the production of lanthanide and other targets, a rotating target wheel, an improved recoil transfer chamber, and a customized on-line radiochemical laboratory. Additional target development is being performed at Argonne National Laboratory. The new facilities and equipment are discussed.     

Engineering and scale-up considerations for microwave induced reactions

Researchers in the area of microwave induced reactions have used many types of hardware, from modified kitchen microwave ovens to commercial generators with waveguide applicators. While in many instances the engineering performance of the hardware is not important in laboratory scale, there are also performance-sensitive experiments. When an experiment becomes successful enough to make one think of scale-ups, then microwave engineering considerations become critical. In this paper figures of merit of microwave systems and applicator configurations are discussed. Prospects for scale-up of microwave chemical reactions are considered by citing recent development in the commercial microwave industry, as well as off-the-shelf equipment. Various large scale applicator configurations are also compared for their possible suitability for inducing reactions.     

面向工程教育专业认证的有机化学实验微课混合式教学模式探索

According to the latest requirements of engineering education professional certification of chemical engineering and technology specialty on organic chemistry laboratory, current situation and problems of organic chemistry laboratory in Jianghan University are discussed from the perspective of teaching mode, teaching content, teachers and students. This paper has explored the blended teaching mode combining the online teaching with the traditional teaching. This teaching mode is successfully applied to the course of organic chemistry laboratory. It has been proved that this teaching mode improved the teaching quality, enhanced the classroom efficiency, achieved the teaching objectives, as well as met the requirements in the engineering education professional certification.     

Rational material design of Li-excess metal oxides with disordered rock salt structure

This review article summarizes recent research development on a new class of electrode materials with a cation-disordered rock salt structure for energy storage applications. Historically, oxide-based electrode materials with the disordered rock salt structure are regarded as “electrochemically inactive.” However, recent experimental and theoretical research reveals that many oxides with the disordered rock salt structure can be utilized as high-capacity electrode materials, which deliver a much larger reversible capacity compared with traditional and cation ordered layered materials used for practical battery applications. For these emerging electrode materials, higher energy density is achieved relying on anionic and/or cationic redox as multi-electron reactions. Moreover, this anionic/cationic redox for Li-excess materials with the rock salt structure is effectively activated for nano-sized materials. These new trends for the material design on high-capacity electrode materials are highlighted and the future direction to design Li/Na insertion materials for energy storage applications is outlooked.     

Design and synthesis of self-healing polymers

Self-healing polymers represent a class of materials with built-in capability of rehabilitating damages. The topic has attracted increasingly more attention in the past few years. The on-going research activities clearly indicate that self-healing polymeric materials turn out to be a typical multi-disciplinary area concerning polymer chemistry, organic synthesis, polymer physics, theoretical and experimental mechanics, processing, composites manufacturing, interfacial engineering, etc. The present article briefly reviews the achievements of the groups worldwide, and particularly the work carried out in our own laboratory towards strength recovery for structural applications. To ensure sufficient coverage, thermoplastics and thermosetting polymers, extrinsic and intrinsic self-healing, autonomic and non-autonomic healing approaches are included. Innovative routes that correlate materials chemistry to full capacity restoration are discussed for further development from bioinspired toward biomimetic repair.     

"新工科"视角下以学生为中心"一纵三横"创新人才培养模式

Under the new economic background, social development needs more high-quality innovative talents with strong engineering practice ability, strong innovation ability and international competitiveness. Based on "emerging engineering education" perspective, the student-centered and "Yi-Zong and San-Heng" education mode has been proposed by analyzing the traditional talent training mode, which will better improve the "new system" of military engineering education.     

高校无机化学实验室资源合理配置的探索与实践

实验教学是高校人才培养、科学研究和学科建设的重要环节,实验室作为实验教学的场所,资源优化配置至关重要。本文分析了天津大学无机化学实验室在资源配置上存在的问题和相关的解决措施,如开设化学类通识实验课程,使授课学生不局限于化学类;使用研究生助教和学生志愿者,减轻实验员工作量;开放实验室设备资源;举办化学化工技能大赛等。以期为其他高校实验室的资源合理配置提供借鉴和参考。     

Dynamic elastic modulus in bending: A new determination technique in impact and rebound conditions

The potential of a new technique for the determination of the dynamic elastic modulus under impact conditions and thus at high strain rates is described. Determination at high strain rate is found to be indispensable when evaluation of a material according to the rules of fracture mechanics at high test speeds is desired.

Although the modulus of elasticity is a property of the material itself, it is dependent on the strain rate. Tests carried out with those techniques normally used have shown their inadequacy in determining the modulus of elasticity as the same strain rate as an impact. On the other hand, the technique presented here, which better simulates the actual technological application conditions of the materials, permits wider study of the physical-mechanical properties of the material.

The apparatus used, which is characterized by its simplicity, can be constructed and used with considerable economic advantage by any laboratory and in particular by those which use instrumented equipment.     

构建虚实结合、线上线下的制药工程专业实验项目——以湖北大学制药工程专业实验改革为例

To effectively solve the problem of insufficient engineering ability in the experimental teaching of pharmaceutical engineering major, the engineering integrated experimental device was designed and developed based on the idea of "one main body and two wings". On the basis of this device, the "virtual and real combination, online and offline" laboratory teaching project of production simulation and unit operation engineering simulation for anti-cough drug levodropropizine was implemented. It is expected to enhance students' engineering awareness and enhance the engineering ability to meet the new requirements of the "new engineering discipline" for professional laboratory teaching.