摘要金属有机骨架（Metal - Organic Frameworks，简称 MOFs）材料是由金属原子与 有机配体之间通过强配位键方式结合而成的一类具有纳米多孔结构的晶体材料。可 潜在应用于电化学储能材料而成为当前材料化学领域的研究热点，但是如何改善 MOFs 的导电性是 MOFs 应用于储能材料系统急需解决的问题。83308
本文成功的制备出了纯相的 Mn-BTC 以及 TCNQ@Mn-BTC 主客体复合材料。 对制备出的材料进行了 XRD、SEM、TG、IR 和 N2 等温吸附脱附曲线等结构表征和 谱学分析，并进行了循环伏安(CV)及充放电等电化学性能测试。
(1) TCNQ 驻留在 Mn-BTC 孔隙不改变 MOF 晶体结构，Mn-BTC 晶体结构不受 浸渍过程的影响。在 2225cm-1 处有一弱的 C≡N 吸收峰。TCNQ@Mn-BTC 有一定的 TCNQ 负载量，制备的 Mn-BTC 的 BET 比表面积为 26。7386 m2·g-1，TCNQ@Mn-BTC 的 BET 比表面积为 1。7973 m2·g-1。
(2)明显的氧化还原峰显示制备的材料有赝电容性质，TCNQ@Mn-BTC 的比容量 相较于没有浸渍 TCNQ 的 Mn-BTC 材料有少许提高。当作为超电容电极材料时， 5mV·s-1 扫速下，制备的 Mn-BTC 样品和浸渍产物的比电容分别为 109 F·g-1 和 139 F·g-1。在 1 A·g-1 下，经过 2000 圈循环之后容量一直保持平稳状态，并没有衰减的迹 象。
毕业论文关键词：TCNQ；Mn-BTC；超级电容器；电化学性能
Abstract Metal−organic frameworks (MOFs) are crystalline nanoporous materials comprised of organic electron donors linked to metal ions by strong coordination bonds。 MOFs can be applied to electrochemical energy storage materials and become a hot research in the field of materials chemistry。 However, how to improve the electrical conductivity of MOFs is a problem to solve for the storage materials system in MOFs。
In this paper, we have successfully synthesized pure phase of Mn-BTC and TCNQ@Mn-BTC host-guest composite。 The structure of products were characterized by XRD, SEM, TG, IR, and N2 adsorption-desorption studies, and the electrochemical properties were characterized by CV and galvanostatic charge-discharge。
(1)TCNQ residing in the Mn-BTC pore, without altering the MOF crystal structure, and MOF crystalline structure was unaffected by the infiltration process。 There is a week C≡N absorption peak at 2225cm-1。 TCNQ@Mn-BTC has a certain TCNQ loading, the
BET surface areas of the prepared Mn-BTC was 26。7386 m2 · g-1, and the
TCNQ@Mn-BTC was 1。7973 m2·g-1。
(2)The obvious redox peaks show that the prepared materials have the properties of the pseudo capacitance。 The specific capacity of TCNQ@Mn-BTC was improved compared with the capacity of Mn-BTC。 The specific capacitance of Mn-BTC crystal and the infiltration product prepared by the solvent thermal method reach 109 F·g-1 and 139 F·g-1, respectively, under the 5 mV·s-1 scan rate。 After 2000 cycles at the current density of 1 A ·g-1, the capacity has remained stationary and there are no signs of decay。
Key words: TCNQ; Mn-BTC; Supercapacitors; Electrochemical properties
目 录
第一章 绪论 1
1。1 研究背景及意义 1
1。2 金属有机骨架材料 1
1。2。1 MOFs 材料的发展简史 1
1。2。2 MOFs 的分类与合成 2
1。2。3 MOFs 的应用 TCNQ@Mn-BTC主客体复合材料的制备及其电化学性能研究:http://www.youerw.com/huaxue/lunwen_98122.html