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Photocatalytic conversion of CO2 to hydrocarbon fuel using carbon and nitrogen co-doped sodium titanate nanotubes

Title
Photocatalytic conversion of CO2 to hydrocarbon fuel using carbon and nitrogen co-doped sodium titanate nanotubes
Authors
Parayil, SK[Parayil, Sreenivasan Koliyat]Razzaq, A[Razzaq, Abdul]Park, SM[Park, Seung-Min]Kim, HR[Kim, Hye Rim]Grimes, CA[Grimes, Craig A.]In, SI[In, Su-Il]
DGIST Authors
Parayil, SK[Parayil, Sreenivasan Koliyat]; Razzaq, A[Razzaq, Abdul]; Park, SM[Park, Seung-Min]; Kim, HR[Kim, Hye Rim]; Grimes, CA[Grimes, Craig A.]; In, SI[In, Su-Il]
Issue Date
2015-06-05
Citation
Applied Catalysis A: General, 498, 205-213
Type
Article
Article Type
Article
Keywords
Carbon Nitrogen Co-DopingCo-DopingDoping (Additives)Electromagnetic Wave AbsorptionExperimental TechniquesHydrothermal TechniquesLight AbsorptionNanotubesNitrogenPhoto-CatalyticPhoto-Catalytic CO2 ConversionPhoto-Catalytic PropertyPhotocatalystsPhotogenerated ElectronsRecombination CentersSodium Titanate NanotubeSodium Titanate NanotubesTitanium CompoundsUreaX-Ray Photoelectron SpectroscopyX Ray Photoelectron SpectroscopyYarn
ISSN
0926-860X
Abstract
Carbon and nitrogen co-doped sodium titanate nanotubes (C,N-TNT) active under simulated solar light are synthesized by a simple two-step process comprising an alkaline hydrothermal technique followed by calcination. Different samples of C,N-TNT with varied dopant concentrations are achieved by changing the amount of urea as a nitrogen and carbon dopants. The photocatalysts are characterized using numerous experimental techniques, and under simulated solar light investigated for the photocatalytic conversion of CO2 and water vapor to CH4. The C,N-TNT sample with an intermediate doping concentration yields the maximum methane yield of 9.75 μmol/g h. The key factors contributing in the improvement of photocatalyst performance includes light absorption, surface area and Na+ ions concentration in TNT acting as CO2 adsorption site and photogenerated electrons recombination centers. The higher doping levels results in lower specific surface areas leading to decrease in photocatalyst performance. Our results suggest co-doping of nanostructured photocatalysts is an excellent pathway for improving textural and photocatalytic properties for the respective application domain. © 2015 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/1661
DOI
10.1016/j.apcata.2015.03.044
Publisher
Elsevier B.V.
Related Researcher
  • Author In, Su Il Green and Renewable Energy for Endless Nature(GREEN) Lab
  • Research Interests CO2 conversion to hydrocarbon fuels; Water splitting for hydrogen generation; Quantum dot devices; Dye sensitized solar cells; Environmental remediation; Synthesis of functional nanomaterials; CO2 연료전환; 수소생산을 위한 광전기화학적 물분해; 양자점 태양전지; 염료감응 태양전지; 공해물질 저감연구; 기능성 나노소재 개발
Files:
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Collection:
Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles


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