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Conjugated Electron Donor?Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO₂ Reduction.

ABSTRACT: This work incorporates a variety of conjugated donor-acceptor (DA) co-monomers such as 2,6-diaminopurine (DP) into the structure of a polymeric carbon nitride (PCN) backbone using a unique nanostructure co-polymerization strategy and examines its photocatalytic activity performance in the field of photocatalytic CO₂ reduction to CO and H₂ under visible light irradiation. The as-synthesized samples were successfully analyzed using different characterization methods to explain their electronic and optical properties, crystal phase, microstructure, and their morphology that influenced the performance due to the interactions between the PCN and the DPco-monomer. Based on the density functional theory (DFT) calculation result, pure PCN and CNU-DP_15.0 trimers (interpreted as incorporation of the co-monomer at two different positions) were extensively evaluated and exhibited remarkable structural optimization without the inclusion of any symmetry constraints (the non-modified sample derived from urea, named as CNU), and their optical and electronic properties were also manipulated to control occupation of their respective highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO). Also, co-polymerization of the donor-acceptor 2,6-diamino-purine co-monomer with PCN influenced the chemical affinities, polarities, and acid-base functions of the PCN, remarkably enhancing the photocatalytic activity for the production of CO and H₂ from CO₂ by 15.02-fold compared than that of the parental CNU, while also improving the selectivity.

SUBMITTER: Hayat A

PROVIDER: S-EPMC6539331 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Conjugated Electron Donor⁻Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO2 Reduction.

Hayat Asif A Rahman Mati Ur MU Khan Iltaf I Khan Javid J Sohail Muhammad M Yasmeen Humaira H Liu Shu-Yuan SY Qi Kezhen K Lv Wenxiu W

Molecules (Basel, Switzerland) 20190508 9

This work incorporates a variety of conjugated donor-acceptor (DA) co-monomers such as 2,6-diaminopurine (DP) into the structure of a polymeric carbon nitride (PCN) backbone using a unique nanostructure co-polymerization strategy and examines its photocatalytic activity performance in the field of photocatalytic CO2 reduction to CO and H2 under visible light irradiation. The as-synthesized samples were successfully analyzed using different characterization methods to explai ...[more]

PMID: 31071946

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Conjugated Electron Donor?Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO₂ Reduction.

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Conjugated Electron Donor⁻Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO<sub>2</sub> Reduction.

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Conjugated Electron Donor?Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO2 Reduction.

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Conjugated Electron Donor⁻Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO<sub>2</sub> Reduction.

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Conjugated Electron Donor?Acceptor Hybrid Polymeric Carbon Nitride as a Photocatalyst for CO₂ Reduction.