Solvent free solid-state synthesis of Pr6O11/g-C3N4 visible light active photocatalyst for degradation of AV7 dye

[Display omitted] •A new combination of Pr6O11/g-C3N4 photocatalyst is synthesized by simple solvent free solid state method.•The photocatalytic activity of Pr6O11/g-C3N4 is investigated by degradation of AV7 dye under visible light.•Improved performance is attributed to enhanced visible light absor...

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Bibliographic Details
Published in:Materials research bulletin 2018-11, Vol.107, p.154-163
Main Authors: Shende, Ashok G., Ghugal, Sachin G., Vidyasagar, Devthade, Kokane, Sanjay B., Jagannath, Umare, Suresh S., Sasikala, Rajamma
Format: Article
Language:English
Subjects:
ABSORPTION
Acid violet 7
CAPACITANCE
CARBON NITRIDES
CHARGE CARRIERS
DYES
ELECTROCHEMISTRY
ELECTRONS
Graphitic carbon nitride
Heterostructure
HOLES
IRRADIATION
MATERIALS SCIENCE
PHOTOCATALYSIS
Photocatalyst
PHOTOCURRENTS
PHOTOLUMINESCENCE
Pr6O11
PRASEODYMIUM OXIDES
SYNTHESIS
VISIBLE RADIATION
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Summary:[Display omitted] •A new combination of Pr6O11/g-C3N4 photocatalyst is synthesized by simple solvent free solid state method.•The photocatalytic activity of Pr6O11/g-C3N4 is investigated by degradation of AV7 dye under visible light.•Improved performance is attributed to enhanced visible light absorption and efficient charge separation as evidenced by photoelectrochemical study.•Pr6O11/g-C3N4 also exhibit super capacitance behavior. A new Pr6O11/g-C3N4 heterostructure material has been prepared by single step solvent free solid state method for photocatalytic environmental cleaning application using visible light. The Pr6O11/g-C3N4 heterostructure exhibits enhanced visible light absorption, resulting in improved photoelectrochemical properties and photocatalytic performance. The optimized composition of Pr6O11/g-C3N4 composite shows improved degradation kinetics and completely degrades AV7 dye within 20 min of visible light irradiation. Photoluminescence and electrochemical studies suggest better separation of photogenerated charge carriers in the composite compared to single phase materials. This is further substantiated by the improved photocurrent response of the composite. The notable increase of photocatalytic activity of Pr6O11/g-C3N4 heterostructure is ascribed to the improved visible light absorption, reduced band gap and better separation of photogenerated electrons and holes. To the best of our knowledge, this new heterostructure photocatalyst is found to be more efficient for the degradation of AV7 dye compared to the systems reported so far.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2018.07.022