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通过自组装技术在低温液相反应体系中制备出大尺寸纳米二氧化钛及其掺碘薄膜。使用XRD、TEM、荧光发射光谱仪、激光拉曼光谱仪等手段对样品进行表征,发现掺I5+后的二氧化钛薄膜在可见光区也表现出明显的响应,而且合成的I5+/TiO2纳米薄膜在TEM观测下其晶型显示为金红石型,并且碘掺杂后样品的拉曼光谱强度减弱,峰位蓝移且宽化。掺杂I5+原溶液浓度为2 mmol/L时,其可见光下光催化效果最优,5 h后降解率可达到95%,较未掺杂的TiO2纳米薄膜提高了40%,I5+掺杂明显提高了TiO2对甲基橙溶液的光催化降解效率。
Large size nano-TiO2 and its iodine-doped thin films were prepared by self-assembly technique in low temperature liquid-phase reaction system. The samples were characterized by XRD, TEM, fluorescence emission spectroscopy and laser Raman spectroscopy. It was found that the TiO2 film doped with I5 + also showed obvious response in the visible light region. Moreover, the synthesized I5 + The crystal form is rutile, and the intensity of Raman spectra of iodine-doped samples is weakened, and the peak position is blue-shifted and broadened. When the concentration of I5 + is 2 mmol / L, the photocatalytic activity under the visible light is the best, and the degradation rate can reach 95% after 5 h, which is 40% higher than that of the undoped TiO2 nanofilm, and the I5 + doping is obviously increased Photocatalytic Degradation Efficiency of TiO2 on Methyl Orange Solution.