Details
| Original language | English |
|---|---|
| Pages (from-to) | 102-115 |
| Number of pages | 14 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 342 |
| Publication status | Published - 1 Jun 2017 |
Abstract
The development of solar light driven photocatalyst for degradation of pollutants in aqueous phase by splitting of water has been an appealing challenge. Herein, visible light induced Na-g-C 3N 4/DyVO 4 nanocomposite with superior photocatalytic activity was synthesized by a facile in situ hydrothermal and ultra-sonication method. The prepared photocatalysts were characterized using standard analytical techniques such as XRD, BET, SEM, EDX, TEM, FT-IR and UV–Vis spectroscopy. The photocatalytic efficiency of prepared material was evaluated by monitoring the degradation of different organic model compounds such as RhB, MO, MB and 4-NP under visible light irradiation as a function of time. The activity was investigated using UV–Vis spectrophotometer and HPLC analysis. Significantly, 15% Na-g-C 3N 4/DyVO 4 nanocomposite possesses superior photocatalytic activity in comparison to the pure forms as well as other composite. The remarkable photocatalytic activity of synthesized composite could be attributed due to generation of heterojunction between Na-g-C 3N 4 and DyVO 4, leading to efficient separation of photogenerated e/h + pairs as confirmed by photoluminescence (PL) spectra. The formation of heterojunction between semiconductors also provides synergic effects which can effectively speed up the charge transfer process as well as prolonged lifetime of photogenerated e/h + pairs, leading to enhancement in the activity. In addition, experiments of radical scavengers confirmed that h + and O 2[rad] − are the main reactive species that play an important role for degradation of targeted pollutants. The results also suggest that degradation kinetics of model compounds follows pseudo first order rate as well as displays superb reusability. A possible photocatalytic mechanism for degradation of model compound over Na-g-C 3N 4/DyVO 4 composite has been discussed on the basis of relative band positions of two semiconductors. The present work not only provides a promising visible light induced photocatalyst but also sheds a new insight into the design of highly efficient photocatalyst nanocomposite with versatile photocatalytic applications.
Keywords
- Charge separation and transfer, Heterojunction, Visible-light induced photocatalyst, Water splitting
ASJC Scopus subject areas
Sustainable Development Goals
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In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 342, 01.06.2017, p. 102-115.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Efficient visible light driven, mesoporous graphitic carbon nitrite based hybrid nanocomposite: With superior photocatalytic activity for degradation of organic pollutant in aqueous phase
AU - Raza, W.
AU - Bahnemann, D.
AU - Muneer, M.
N1 - Publisher Copyright: © 2017 Elsevier B.V. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/6/1
Y1 - 2017/6/1
N2 - The development of solar light driven photocatalyst for degradation of pollutants in aqueous phase by splitting of water has been an appealing challenge. Herein, visible light induced Na-g-C 3N 4/DyVO 4 nanocomposite with superior photocatalytic activity was synthesized by a facile in situ hydrothermal and ultra-sonication method. The prepared photocatalysts were characterized using standard analytical techniques such as XRD, BET, SEM, EDX, TEM, FT-IR and UV–Vis spectroscopy. The photocatalytic efficiency of prepared material was evaluated by monitoring the degradation of different organic model compounds such as RhB, MO, MB and 4-NP under visible light irradiation as a function of time. The activity was investigated using UV–Vis spectrophotometer and HPLC analysis. Significantly, 15% Na-g-C 3N 4/DyVO 4 nanocomposite possesses superior photocatalytic activity in comparison to the pure forms as well as other composite. The remarkable photocatalytic activity of synthesized composite could be attributed due to generation of heterojunction between Na-g-C 3N 4 and DyVO 4, leading to efficient separation of photogenerated e/h + pairs as confirmed by photoluminescence (PL) spectra. The formation of heterojunction between semiconductors also provides synergic effects which can effectively speed up the charge transfer process as well as prolonged lifetime of photogenerated e/h + pairs, leading to enhancement in the activity. In addition, experiments of radical scavengers confirmed that h + and O 2[rad] − are the main reactive species that play an important role for degradation of targeted pollutants. The results also suggest that degradation kinetics of model compounds follows pseudo first order rate as well as displays superb reusability. A possible photocatalytic mechanism for degradation of model compound over Na-g-C 3N 4/DyVO 4 composite has been discussed on the basis of relative band positions of two semiconductors. The present work not only provides a promising visible light induced photocatalyst but also sheds a new insight into the design of highly efficient photocatalyst nanocomposite with versatile photocatalytic applications.
AB - The development of solar light driven photocatalyst for degradation of pollutants in aqueous phase by splitting of water has been an appealing challenge. Herein, visible light induced Na-g-C 3N 4/DyVO 4 nanocomposite with superior photocatalytic activity was synthesized by a facile in situ hydrothermal and ultra-sonication method. The prepared photocatalysts were characterized using standard analytical techniques such as XRD, BET, SEM, EDX, TEM, FT-IR and UV–Vis spectroscopy. The photocatalytic efficiency of prepared material was evaluated by monitoring the degradation of different organic model compounds such as RhB, MO, MB and 4-NP under visible light irradiation as a function of time. The activity was investigated using UV–Vis spectrophotometer and HPLC analysis. Significantly, 15% Na-g-C 3N 4/DyVO 4 nanocomposite possesses superior photocatalytic activity in comparison to the pure forms as well as other composite. The remarkable photocatalytic activity of synthesized composite could be attributed due to generation of heterojunction between Na-g-C 3N 4 and DyVO 4, leading to efficient separation of photogenerated e/h + pairs as confirmed by photoluminescence (PL) spectra. The formation of heterojunction between semiconductors also provides synergic effects which can effectively speed up the charge transfer process as well as prolonged lifetime of photogenerated e/h + pairs, leading to enhancement in the activity. In addition, experiments of radical scavengers confirmed that h + and O 2[rad] − are the main reactive species that play an important role for degradation of targeted pollutants. The results also suggest that degradation kinetics of model compounds follows pseudo first order rate as well as displays superb reusability. A possible photocatalytic mechanism for degradation of model compound over Na-g-C 3N 4/DyVO 4 composite has been discussed on the basis of relative band positions of two semiconductors. The present work not only provides a promising visible light induced photocatalyst but also sheds a new insight into the design of highly efficient photocatalyst nanocomposite with versatile photocatalytic applications.
KW - Charge separation and transfer
KW - Heterojunction
KW - Visible-light induced photocatalyst
KW - Water splitting
UR - http://www.scopus.com/inward/record.url?scp=85017554198&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2017.03.036
DO - 10.1016/j.jphotochem.2017.03.036
M3 - Article
VL - 342
SP - 102
EP - 115
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
ER -