The Preparation Of Micron/Nanometer Materials Modifying Electrode And Research Of Their Electrochemical Properties

As science and technology develops rapidly and research that human being carries on materials are continuously deepened, microcosmic field has gradually become a focus of research. Nanofiber can be applied to various fields and a great number of research has been done on its preparation methods. Currently, there are several common preparation methods of nanofiber: electro-spinning method, hydro-thermal method, the method of island bi-component complex spinning, the method of template synthesis, the method of self-assembly, etc. Among these methods, there are several advantages of electro-spinning method including easy operation, convenience, easily-to-be-controlled, wide source of raw materials, low cost and high productivity, so the method is especially favored. On the other hand, hydro-thermal method has been widely utilized because by this method, an environment of high-voltage and high-pressure can be created inside reaction kettle so that those undissolved substances or insoluble materials under normal temperature and pressure can be dissolved, re-crystallize and grow. The paper introduces processes of making sensor and capacitor: a Co3O4 micron-modifying electrode non-enzymatic-glucose sensor is prepared by high-voltage electro-spinning technology and a Zn O@Ti O2@Zn O@Mn O2 super capacitor is prepared by electro-spinning and hydro-thermal methods. The details of operations are as follows:1. Co3O4 micron-modifying electrode non-enzymatic-glucose sensor was made through constant-temperature calcinations in the muffle roaster after utilizing electro-spinning technology, using FTO electrode as the receiving screen and electro-spinning the mixed precursor solution, comprised of cabaltous nitrate and high polymer. Through Ampere analysis method and voltmeter-ammeter method, it is found that in different cases of calcinations temperature, the electro-catalytic performance of Co3O4-modifying electrode towards non-enzymatic glucose varies: the performance decreases as the calcinations temperature increases. The electro-catalytic performance of Co3O4-modifying-electrode, produced under the calcinations temperature of 300℃, towards non-enzymatic glucose is relatively good.2. Zn O@Ti O2@Zn O@Mn O2 super capacitor is prepared by electro-spinning and hydro-thermal methods. Firstly, by utilizing hydro-thermal method, Zn O is enabled to grow. Later, by utilizing electro-spinning method, a layer of Ti O2 is electro-spun on the FTO electrode, on which Zn O has grown. Then, on the electrode of Zn O@Ti O2@Zn O@Mn O2, by hydro-thermal method, a layer of Zn O is enabled to grow. At last, complex nanofibers wrapped up by carbon are dipped into 20 m L KMn O4(0.03 M) aqueous solution. Then, the nanofibers and the solution are hydrothermal for five hours in the temperature of 160℃ in the stainless steel pressure pan lined by PTFE. Because of the interface reaction between C and KMn O4, the complex nanomaterials of Zn O@Ti O2@Zn O@Mn O2 core-shell are obtained. The super capacitor performance of Mn O2 nanomaterial is good. However, its poor conductive property and cycle performance limit its application in the field. On contrary, the electrical conductivity of Zn O is good as well as the super capacitor shape of Ti O2 is relatively good. So it has been taken into consideration that the kind of Zn O@Ti O2@Zn O@Mn O2 complex nanomaterial modifying electrode will be prepared to enhance the electrical conductivity of Mn O2。...