Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 75, Issue 3, Pages 441-446Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2013.12.001
Keywords
Optical materials; Chemical synthesis; Infrared spectroscopy; Optical properties
Funding
- National Natural Science Foundation of China [61378085, 61308095, 11254001]
- development of Science and Technology of Jilin province [201115219, 201201079, 201215222, 201215225]
- Program for the Master Students' Scientific and Innovative Research of Jilin Normal University [201141]
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Novel g-C3N4/ZnO composite photocatalyst was synthesized from an oxygen-containing precursor by direct thermal decomposition urea in air without any other templates assistance. Different percentages of g-C3N4 were hybridized with ZnO via the monolayer-dispersed method. The prepared g-C3N4/ZnO composites were characterized by XRD, SEM, UV-vis diffuse reflectance spectra (DRS), FT-IR, TEM and XPS. The composites showed much higher efficiency for degradation of Rhodamine B (RhB) than ZnO under UV and visible light irradiation. Especially, the photocatalytic efficiency was the highest under UV light irradiation when the percentage of g-C3N4 was 6%. The improved photocatalytic activity may be due to synergistic effect of photon acquisition and direct contact between organic dyestuff and photocatalyst Then, effective separation of photogenerated electron-hole pairs at the interface of g-C3N4 is an important factor for improvement of photocatalytic activity. This work indicates that g-C3N4 hybrid semiconductors photocatalyst is a promising material in pollutants degradation. (C) 2013 Elsevier Ltd. All rights reserved.
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