Alcohol solvents evaporation-induced self-assembly synthesis of mesoporous TiO2−x−yCxNy nanoparticles toward visible-light driven photocatalytic activity

Shou Heng Liu, Han Ren Syu, Chung Yi Wu

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

A one-step solvent evaporation-induced self-assembly (SEISA) process was demonstrated to prepare carbon and nitrogen co-doping mesoporous TiO2 nanoparticles (MesoTiO2−x−yCxNy-S) using an ionic liquid as carbon and nitrogen sources as well as mesoporous template. After the evaporation of different solvents (methanol, ethanol, and isopropanol) and subsequent calcinations at 773 K, the obtained MesoTiO2−x−yCxNy-S samples were systematically characterized by a variety of spectroscopic and analytical techniques, including small- and large-angle X-ray diffraction (XRD), Raman, transmission electron microscopy (TEM), N2 adsorption–desorption isotherms, Fourier transform infrared (FTIR), and X-ray photoelectron (XPS) spectroscopies. The results indicate that the solvents play an essential role on the chemical microstructure, doping elemental states, and photocatalytic performance of catalysts. The MesoTiO2−x−yCxNy-I samples have the lowest band gap of ca. 2.75 eV and strongest absorbance of visible light in the range of 400–600 nm. Among the MesoTiO2−x−yCxNy-S photocatalysts, the MesoTiO2−x−yCxNy-M catalysts show superior photocatalytic activity of hydrogen generation in methanol aqueous solution under visible light irradiation as compared to MesoTiO2−x−yCxNy-E, MesoTiO2−x−yCxNy-I, and commercial Degussa TiO2. This result could be attributed to the moderate C,N co-doping amounts on their developed mesoporous texture (pore size = 8.0 nm) and high surface area (107 m2 g−1) of TiO2 (crystallite size = 9.9 nm) in the MesoTiO2−x−yCxNy-M catalysts.

原文English
文章編號2750
期刊Journal of Nanoparticle Research
16
發行號12
DOIs
出版狀態Published - 2014 12月

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 化學 (全部)
  • 原子與分子物理與光學
  • 建模與模擬
  • 材料科學(全部)
  • 凝聚態物理學

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