NDLI: Anchoring H3PW12O40 on 3-aminopropyltriethoxysilane modified graphene oxide: enhanced adsorption capacity and photocatalytic activity toward methyl orange

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhao, Panpan Deng, Shengjun Xiao, Weiming Zhang, Ning
Copyright Year	2015
Abstract	H3PW12O40 (PW12) was hybridized with 3-aminopropyltriethoxysilane modified graphene oxide (GO–NH2) sheets using a facile impregnation method, for the removal of organic pollutants in water. The obtained hybrid (PW12/GO–NH2) was characterized by elemental analysis, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), transmission electron microscopy (TEM), and photo-electrochemical measurements. Its removal efficiency for organic pollutants was evaluated by the removal of methyl orange (MO). The results show that about 61.8% of MO is adsorbed onto the PW12/GO–NH2 hybrid upon 2 h of mixing, and after 2 h of irradiation under a high-pressure mercury lamp, MO is further decreased to 17.7%. The adsorption capacity of PW12/GO–NH2 hybrids is enhanced as compared with GO–NH2, probably due to enhanced electrostatic attraction and hydrogen-bonding interactions between the hybrid and MO. And the hybrid exhibits a better photocatalytic activity than the homogenous photocatalyst PW12 (1.36 times), which is probably attributed to the effective separation of photo-generated electron–hole pairs. Furthermore, the trapping experiment of active species during the photocatalytic degradation was carried out over PW12/GO–NH2, revealing that the oxidation of MO by O2˙− and ˙OH plays a major role in the photocatalytic degradation process.
Starting Page	3719
Ending Page	3727
Page Count	9
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	5
Journal	New Journal of Chemistry
DOI	10.1039/c4nj02171a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Infrared spectroscopy Spectroscopy Oxygen Photocatalysis Photoluminescence Fourier-transform infrared spectroscopy Photoemission spectroscopy Raman spectroscopy X-ray crystallography Transmission electron microscopy Fourier Adsorption Graphene Mercury-vapor lamp Raman Methyl orange X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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