Journal
COLLOID AND POLYMER SCIENCE
Volume 293, Issue 4, Pages 1151-1157Publisher
SPRINGER
DOI: 10.1007/s00396-015-3507-x
Keywords
Anatase TiO2; Graphene oxide; Microsphere; Polymer composite; Photocatalytic degradation
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Funding
- National Natural Science Foundation of China [51301071, 51103039]
- Science and Technology Commission of Shanghai Municipality [13PJ1401800]
- Shanghai Municipal Education Commission [14ZZ057]
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Graphene oxide (GO) sheets exfoliated from graphite were wrapped on the surfaces of polymer microspheres (2.5 mu m in diameter) to form GO-skined GO/polymer hybrid microspheres. Subsequently, anatase TiO2 nanoparticles were nucleated and grown on the GO surfaces under solvothermal conditions, meanwhile GO was reduced to reduced graphene oxide (rGO). The results of X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and Raman spectra demonstrate the formation of TiO2/rGO/polymer composites. Solvothermal reaction time was found to be an important factor in the crystallinity and size of anatase TiO2 nanoparticles, further in the photocatalytic activities of TiO2/rGO/polymer composites. The new composites behaved excellent photocatalytic activities, achieving 96 % degradation of rhodamine B in 30 min under visible light. Comparing with commercial TiO2, the improved photocatalytic activities of TiO2/rGO/polymer are attributed to the unique electrical conductivity of rGO, the nanosized anatase TiO2 particles, and the interactions between them.
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