4.7 Article

Synthesis and characterization of cubic Ag/TiO2 nanocomposites for the photocatalytic degradation of methyl orange in aqueous solutions

期刊

INORGANIC CHEMISTRY COMMUNICATIONS
卷 110, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.inoche.2019.107589

关键词

Hydrothermal; TiO2; Ag/TiO2; Photocatalysis; Methyl orange

资金

  1. National Natural Science Foundation of China [21971152, 51904175]
  2. Natural Science Foundation of Shandong Province [ZR2018MB002, ZR2018MEE003, ZR2018PEE006, ZR2017BB008]

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Using a hydrothermal strategy combined with photoreduction process, Ag/TiO2 nanocomposites in which ultrasmall metallic Ag anchored on nano-TiO2 were synthesized. The SEM, TEM, EDS, XRD, as well as UV-Vis-NIR spectrum were used to characterize the Ag/TiO2 nanocomposites. It can be drawn the conclusion that the TiO2 exhibited irregular cube with a diameter of 20-30 nm, and metallic Ag anchored on the surface of nano-TiO2. The addition of metallic Ag successfully broaden the photoresponse range from UV region to visible light region. Photocatalytic activity of Ag/TiO2 was evaluated by degradation of methyl orange in aqueous solution. The results showed that the degradation rate of methyl orange by Ag/TiO2 reached 65.4% in 120 min, indicating a higher photocatalytic activity of Ag/TiO2 than that of pure TiO2 nanomaterials. The additional absorption of Ag/TiO2 in visible region was attributed to the plasmonic absorption of Ag. Moreover, the kinetic behavior could be described in terms of Langmuir-Hinshelwood pseudo-first-order kinetic equation.

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