Phenyl-grafted carbon nitride semiconductor for photocatalytic CO 2 -reduction and rapid degradation of organic dyes

Devthade Vidyasagar, Nilesh Manwar, Akanksha Gupta, Sachin G. Ghugal, Suresh S. Umare, Rabah Boukherroub

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


Molecular engineering of graphitic carbon nitride (g-C 3 N 4 ) is achieved by the copolymerization of π-conjugated phenyl urea, melamine, and urea. Integration of aromatic phenyl rings into the heptazine network of g-C 3 N 4 alters its structural, optical and electronic properties. The fusion of the polymeric g-C 3 N 4 core with aromatic phenyl groups induces band gap tuning, which greatly improves the separation and lifetime of charge-carriers. As a result, CO 2 photoreduction experiments conducted by using phenyl-grafted g-C 3 N 4 afford methane and formic acid in high yields. Furthermore, a selective model organic pollutant rhodamine B dye is rapidly decomposed under visible-light irradiation. This work suggests that pyrolysis of a suitable aromatic π-deficient molecular dopant such as phenyl urea can drastically alter the photo-response of the carbon nitride photocatalyst and may enhance its photocatalytic activity. Hence, the present work is expected to be of significant value in sustainable energy production and environmental remediation.

Original languageEnglish
Pages (from-to)822-832
Number of pages11
JournalCatalysis Science and Technology
Issue number3
StatePublished - 2019
Externally publishedYes

Bibliographical note

Funding Information:
D. Vidyasagar acknowledges the director, VNIT, Nagpur for a research fellowship. NM would like to acknowledge HRDG-CSIR, New Delhi for the award of CSIR-Nehru Science Postdoctoral Research Fellow with their fiscal assistance. Sachin G. Ghugal would like to thank DST-SERB National Postdoctoral Fellowship scheme, Govt. of India for research funding (PDF/2017/002951). SSU is thankful to DST-SERB for financial assistance through project number SB/EMEQ-052/2014SERB. The authors also thank IISc, Bangalore NMR Facility, SAIF-IIT Madras, SAIF-Shillong, and SAIF-Chandigarh for characterization support.

Publisher Copyright:
© 2019 The Royal Society of Chemistry.


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