SnS and SnS2 nanocomposites via hot injection method for electrocatalytic application

• Main Authors: HUANG, SIANG-RU, 黃湘茹
• Other Authors: CHEN, MEI-LI
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/15569845397053090331

碩士 === 南臺科技大學 === 光電工程系 === 105 === In this study, tin sulfide / tin disulfide nanomaterials were prepared by hot injection method and carried out under an inert atmosphere. The experiment was mainly divided into four parts. In the first part, tin oxide (SnO) was dissolved in oleic acid (Sn (OA) x) as a tin source, and thioacetamide and oleylamine were prepared in Oleic Acid. After the sulfur source is completely dissolved, the sulfur source is rapidly injected into the tin source, so that the tin ion and the sulfur ion are rapidly precipitated to grow the tin sulfide nanometer structure. The second part is mainly to undertake the first part, by changing the concentration of sulfur precursor and the reaction temperature as a change. The third part is also the first part of the convergence of the complete dissolved in the addition of graphene (Graphene). The fourth part is the continuation of the third part, the synthesis of tin sulfide powder to do vulcanization, the formation of SnS2 powder, and for the four parts of the results obtained by the morphology, crystalline structure to explore, by XRD analysis of its crystalline phase And the morphology and crystal structure of the nanoparticles were observed by means of a penetrating electron microscope (TEM). In order to further study the photoelectrochemical properties of tin sulfide / tin disulfide, the precipitated tin sulfide / tin disulfide powder was prepared into an optical film and uniformly coated on the optical glass by spin coating (Spin Coating) The UV-VIS spectrophotometer was used to observe the permeability-absorption spectrum of the tin sulfide / tin disulfide powder, and then the electrochemical performance of the electrochemical analyzer was used to obtain the current-voltage (IV) curve. In this experiment, the best precursor source concentration of tin and sulfur ratio of 1: 5, and the reaction temperature of 280 ℃, and the reaction time of one hour, can be synthesized with better crystallinity of tin sulfide / tin disulfide nanoparticles The As the reaction temperature increases, the large size of the tin sulfide crystals will not continue to grow, while the small size of the crystal will gradually disappear. In the optical properties, the study of the preparation of tin sulfide / tin disulfide film are 1.49eV and 2.4eV wide energy gap. In the electrocatalytic properties, both before and after vulcanization, the current density is higher than the original pure glass carbon electrode (Glass Carbon) about 0.25 (mA/cm2), and from the experimental results can be learned, regardless of process temperature of the film prepared by the film have the effect of electrocatalytic, so this material has the potential of electrocatalysis.