期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 42, 页码 21090-21098出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta03229f
关键词
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资金
- National Natural Science Foundation of China [21307035, 51572101]
- Natural Science Foundation of Hubei Province [2014CFB919]
- Fundamental Research Funds for the Central Universities of China [2013PY112]
- South-Central University for Nationalities [CZY14003]
- Open Foundation of Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission
- Ministry of Education, South-Central University for Nationalities [CHCL12004]
Fullerene C-70 modified TiO2 (C-70-TiO2) hybrids were fabricated through a hydrothermal method from titanium sulfate and functionalized C-70. The structures of the synthesized hybrids were characterized by X-ray diffraction, UV-vis diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller surface area measurements, matrix-assisted laser desorption/ionization-time of flight-mass spectrometry and photoluminescence spectroscopy. The experimental results indicated that the introduction of C-70 slightly reduces the crystallite size of TiO2 while extending its adsorption edge to the visible light region. C-70 dispersed on the surface of TiO2 nanoparticles with covalent bonding, which generated strong interactions between the functionalized C-70 and TiO2. The O-2(center dot-), (OH)-O-center dot and h(+) are active species which were proved by the trapping experiment. The photocatalytic degradation efficiency of sulfathiazole over C-70-TiO2 hybrids is higher than that over pure TiO2, C-60-TiO2, and a mechanical mixture of C-70 and TiO2 under visible light irradiation. The excellent visible light-induced activity is rationalized by the results of photoluminescence spectroscopy; i.e., the intensities of emissions from C-70-TiO2 hybrids were found to be weaker than those from pure TiO2 and C-60-TiO2 hybrid.
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