二氧化锡纳米材料的可控制备和光催化性能研究-化学专业论文.docx

摘 要 二氧化锡(SnO2)作为主要 N 型宽禁带半导体材料，具有特殊的性能与结构，在许多方 面有着广泛的应用如：透明导光电极、光催化、气敏传感器等。随着科技的进步和经济的 发展，实现对二氧化锡纳米材料的可控制备，对于其各项性质参数调控也将具有重要意义 和价值。 本文以水热合成法制备 SnO2 纳米球和纳米花，分别通过调节反应中的反应温度、时 间、反应溶剂中水与乙醇的比例和反应中 MPh3SnCl/MNaOH 的比值分别制备出了 SnO2 纳米微 球与纳米花球。研究了不同反应条件对 SnO2 纳米材料的形貌影响的合成条件，从而达到 对其形貌结构的控制。对合成产物进行 XRD、SEM 测试，并对合成产物进行光催化性能 的研究。 以 Ph3SnCl 作为锡源，利用低温水热法合成前驱体，在经过 500℃煅烧后得到最终产 物为尺寸较小 SnO2 纳米颗粒，并对其进行 XRD、SEM，红外吸收，紫外漫反射表征，同 时对其进行光催化性能测试。结果表明，SnO2 纳米颗粒与纳米花比纳米微球和球花有着 较好的光催化性能。 关键词：二氧化锡 水热 微球 颗粒 光催化 ABSTRACT SnO2 is an important wide-band-gap N-type semiconductor with special performance and structure and range of application such as transparent conducting electrodes photocatalysis and gas-sensing sensors. Recently，many researches shows that small particle size and large specific surface area are essential to high performance of SnO2 for applications as gas sensors and catalysts．Hence, it is an important and meaningful for SnO2 nanostructure to focuse to synthesis controllablely. In this thesis, SnO2 nanosphere and flower-like nanostructure SnO2 were prepared by a hydrothermal process．The effects of synthesis conditions including reaction temperature and time，the ratio of the H2O and ethanol in the solvent．The results show that，the morphology can be well controlled by adjusting those processing parameters. The morphologies and structures of the final products were investigated by XRD and SEM, and the photocatalytic performance of as-prepared samples were also studied. The smaller-sized SnO2 nanoparticles were prepared by low-temperature hydrothermal treatment of Ph3SnCl and as the precursor and then sintering at 500℃. The morphologies and structures of the final products were investigated in details by XRD and SEM the results show SnO2 nanoparticles and flower-like nanostructure have better phototalytic performance, and the photocatalysis performance of as-prepared samples were also studied. Key words: tin dioxide hydrothermal micrballon particle photocatalysis 目 录 HYPERLINK \l