Synthesis and characteristics of layered tin disulfide nanostructure via hot injection method

• Main Authors: Hsin-IWang, 王心邑
• Other Authors: Jow-Lay Huang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/63739600813142882323

碩士 === 國立成功大學 === 材料科學及工程學系 === 103 === Layered SnS2 nanostructures were synthesized via a facile hot injection method during which the tin precursor was quickly injected into the sulfur precursor and the precipitation of tin and sulfur ions leads to the growth of layered SnS2 nanosheets. In this study, we have altered the precursor concentration and reaction time to analyze the growth mechanism of SnS2. The results show that stable SnS2 nanosheets can be obtained when the precursor ratio of tin and sulfur was 1:5 with a one hour reaction time period and the maximum particle size obtained is about 400 nm. For a prolonged reaction time, the particle size will not increase but only result in a change in the thickness of the layered nanosheets. SnS2 thin films were deposited on a glass substrate using the spin coating technique followed by annealing at 200 oC for 2 hrs. The film structure is uniform and shows a preferred orientation along the (001) plane. Analysis of the UV-visible spectrum shows strong absorption for the SnS2 film in the visible region of the electromagnetic spectrum and its band gap is observed at about 2.4 eV. Furthermore, it can be seen from the I-V curve results that the SnS2 thin film has a resistance of 2200 Ω and its on-set potential is 0.12 V, making it suitable for electrocatalytic applications.