1. Molecular engineering optimized carbon nitride photocatalyst for CO2 reduction to solar fuels
- Author
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Asif Hayat, Muhammad Sohail, Waseem Iqbal, T.A. Taha, Asma M. Alenad, Abdullah G. Al-Sehemi, Sami Ullah, Noweir Ahmad Alghamdi, A. Alhadhrami, Zeeshan Ajmal, Arkom Palamanit, W.I. Nawawi, Huda Salem AlSalem, Hamid Ali, Amir Zada, and Mohammed A. Amin
- Subjects
Carbon nitride ,Molecular engineering ,2,6-Pyridinedicarboxylic acid ,CO2 reduction ,Charge transfer ,DFT ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
The structural alteration of carbon nitride (CN) for photocatalytic CO2 reduction is a promising research topic in the environmental and energy sectors. This work discusses the fabrication of photocatalyst through a heterojunction architecture obtained from the molecular engineering of electron-rich organic monomer 2,6-pyridinedicarboxylic acid (PDA) with CN precursor (CN/PDAx). The successful integration of PDA in the structure of CN served as a charge inducting entity to enhance charge separation and photocatalytic CO2 reduction under visible light (λ = 420 nm). The DFT results indicated that the upshift in the HOMO level of CN after integration of PDA in its framework was the most lawful for the charge separation and for obtaining a high reduction potential. As-synthesized photocatalysts were demonstrated for various integral analysises and after evaluating the process of photocatalytic CO2 reduction under visible light region (λ = 420 nm). The optimized sample CN/PDA10 has the most excellent photocatalytic activity producing 85.4 μmol/h of CO and 21.3 μmol/h of H2, achieving a 7.5-fold enhanced catalytic efficiency as compared to pure CN. We hope that this work will attract more attention to synthesizing efficient photocatalysts for energy production and environmental remediation.
- Published
- 2022
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