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.
|Number of pages||11|
|Journal||Catalysis Science and Technology|
|State||Published - 2019|
Bibliographical noteFunding 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.
© 2019 The Royal Society of Chemistry.