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- Title
Ag decorated G‐C<sub>3</sub>N<sub>4</sub>/black titanium oxides composite for the destruction of environmental pollutant under solar irradiation.
- Authors
Masih, Dilshad; Ma, Yuanyu; Rohani, Sohrab
- Abstract
Research on the synthesis of advanced composite materials is an important area of research on the visible‐active photodegradation of environmental pollutants. Novel hybridized structures of graphitic carbon nitride (g‐C3N4) are synthesized by a facile one‐step in‐situ method. Black titanium oxides, TiO, Ti2O 3, a mixture of TiO + Ti2O3, and a reference material, white TiO2 P25, are used for the synthesis of the hybridized g‐C3N4 and further decorated with Ag nanoparticles. Physicochemical and optical properties of the obtained materials are characterized by various techniques. XRD patterns revealed that the structural regularity of g‐C3N4 and titanium oxide(s) is maintained in the composites. However, the main diffraction peak for g‐C3N4 is prominently shifted to a lower 2‐theta along with a decrease in the intensity, indicating the formation of g‐C3N4 nanosheet heterojunction. Vibrational spectra of the composites showed signature IR peaks for g‐C3N4 and demonstrated an enhancement in the vibrations after modifications, and further supported the XRD results. A distinct red‐shift in the optical spectra of g‐C3N4 upon modifications with black titanium oxide(s) demonstrated an enhanced absorbance of visible light, yet on the contrast white TiO2 P25 showed a blue‐shift. Under the experimental conditions of simulated solar light, pristine g‐C3N4, and its composites g‐C3N4/TiO and g‐C3N4/Ti2O3 showed moderate activity for the photodegradation of an organic pollutant, rhodamine B. Interestingly, a synergistic enhancement in the photoactivity is demonstrated by the g‐C3N4 modified with a mixture of black titanium oxides (g‐C3N4/TiO + Ti2O3). On the other hand, the composite synthesized by a post‐synthesis method is found less effective in photodegradation reaction.
- Subjects
POLLUTANTS; TITANIUM oxides; ENVIRONMENTAL degradation; TITANIUM composites; NITRIDES; COMPOSITE materials synthesis
- Publication
Canadian Journal of Chemical Engineering, 2019, Vol 97, Issue 10, p2632
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.23560