Nanostructured Carbon Nitrides for CO2 Capture and Conversion

Siddulu Naidu Talapaneni, Gurwinder Singh, In Young Kim, Khalid AlBahily, Ala'a H. Al-Muhtaseb, Ajay S. Karakoti, Ehsan Tavakkoli, Ajayan Vinu*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

38 Citations (Scopus)

Abstract

Carbon nitride (CN), a 2D material composed of only carbon (C) and nitrogen (N), which are linked by strong covalent bonds, has been used as a metal-devoid and visible-light-active photocatalyst owing to its magnificent optoelectronic and physicochemical properties including suitable bandgap, adjustable energy-band positions, tailor-made surface functionalities, low cost, metal-free nature, and high thermal, chemical, and mechanical stabilities. CN-based materials possess a lot of advantages over conventional metal-based inorganic photocatalysts including ease of synthesis and processing, versatile functionalization or doping, flexibility for surface engineering, low cost, sustainability, and recyclability without any leaching of toxic metals from photocorrosion. Carbon nitrides and their hybrid materials have emerged as attractive candidates for CO2 capture and its reduction into clean and green low-carbon fuels and valuable chemical feedstock by using sustainable and intermittent renewable energy sources of sunlight and electricity through the heterogeneous photo(electro)catalysis. Here, the latest research results in this field are summarized, including implementation of novel functionalized nanostructured CNs and their hybrid heterostructures in meeting the stringent requirements to raise the efficiency of the CO2 reduction process by using state-of-the-art photocatalysis, electrocatalysis, photoelectrocatalysis, and feedstock reactions. The research in this field is primarily focused on advancement in the synthesis of nanostructured and functionalized CN-based hybrid heterostructured materials. More importantly, the recent past has seen a surge in studies focusing significantly on exploring the mechanism of their application perspectives, which include the behavior of the materials for the absorption of light, charge separation, and pathways for the transport of CO2 during the reduction process.

Original languageEnglish
Article number1904635
JournalAdvanced Materials
Volume32
Issue number18
DOIs
Publication statusPublished - May 1 2020

Keywords

  • CN nanosheets
  • CO adsorption
  • CO reduction
  • g-CN hybrids
  • nanostructured carbon nitrides
  • photocatalysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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