Visible-light enhanced photocatalytic performance of polypyrrole/g-C 3 N 4 composites for water splitting to evolve H 2 and pollutants degradation

Asif Hayat, Fazal Raziq, Muhammad Khan, Ikram Ullah, Mati Ur Rahman, Wasim Ullah Khan, Javid Khan, Akhlaq Ahmad

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

In this work, we report the fabrication of polypyrrole/g-C 3 N 4 (PPy/g-C 3 N 4 ) nanocomposites via simple wet-chemical method. The photocatalytic activities of the composites are evaluated for water splitting to evolve H 2 , Rhodamine B dye (RhB) and 2,4-dichlorophenol (2,4-DCP) degradation under visible-light. The results reveal that the photocatalytic performance of g-C 3 N 4 for H 2 evolution, RhB dye and 2, 4-DCP degradation are significantly improved after coupling polypyrrole (PPy). Worth noting, the amount optimized (1 wt%PPy/g-C 3 N 4 ) photocatalyst showed highest photoactivity compared to the other photocatalysts. Further, it is confirmed by means of radical trapping experiments that superoxide radical (O 2 [rad] − ) is the dominant specie involved in the degradation of pollutants over PPy/g-C 3 N 4 nano-composites. Moreover, clear photocatalytic reactions for H 2 evolution and pollutants degradation are proposed. This work would help us to deeply understand the reaction mechanism and will provide feasible routes to fabricate g-C 3 N 4 based highly efficient photocatalysts for energy and environmental applications.
Original languageEnglish (US)
Pages (from-to)88-98
Number of pages11
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume379
DOIs
StatePublished - Jun 15 2019
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Chemical Engineering(all)
  • Chemistry(all)

Fingerprint

Dive into the research topics of 'Visible-light enhanced photocatalytic performance of polypyrrole/g-C 3 N 4 composites for water splitting to evolve H 2 and pollutants degradation'. Together they form a unique fingerprint.

Cite this