AgI-modified TiO2 supported by PAN nanofibers: A heterostructured composite with enhanced visible-light catalytic activity in degrading MO

作者：Yu, Dandan; Bai, Jie^*; Liang, Haiou; Ma, Tengfei; Li, Chunping

来源：Dyes and Pigments, 2016, 133: 51-59.

DOI：10.1016/j.dyepig.2016.05.036

• Composite
• Hydrogenation reduction
• PAN nanofibers
• Silver iodine
• Visible-light catalysis

A highly visible-light responsive AgI-TiO2/PAN had been successfully synthesized by the electrospinning technique, hydrogenation reduction, solvothermal synthesis, and gas/solid oxidation. The component and morphology of the as-prepared catalysts were characterized by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and Fourier transform infrared spectroscopy (FUR). In the degradation experiments, the as-prepared AgI-TiO2/PAN showed a highly photocatalytic activity in degrading methyl orange (MO) under visible light irradiation and the AgI content had a strong effect in their photocatalytic activity. Moreover, the degradation efficiency of MO over AgI-TiO2/PAN was much higher as compared to that of pure PAN, AgI/PAN and TiO2/PAN, which was attributed to the synergistic effect between AgI and TiO2. Besides, AgI-TiO2/PAN had an excellent stability in the cycling tests due to the intimate connect and stable heterostructure of AgI-TiO2. It's astonished to find that the application of PAN nanofibers, which presented in membranous form, made it easy separate the catalysts from an aqueous solution without any loss.

• 出版日期2016-10
• 单位内蒙古工业大学