Triethanolamine (TEA) Aqueous Solution as an Electrolyte Promoter in CO₂ Photoelectro-Conversion under Simulated Solar Irradiation Assisted by Cu-Doped Graphene-Titania Catalyst

Abstract:

Copper doped graphene-TiO₂ nanocomposite were prepared via sol-gel process and embedded onto ITO coated glass films using electrophoretic deposition technique. The catalyst films were used for photoelectrocatalysis (PEC) of CO₂ induced under simulated solar irradiation. Triethanolamine (TEA) aqueous solution was used as an electrolyte in this experiment. CO₂ capture in the electrolyte solution plays vital role in the PEC process and in this case, the effect of TEA was investigated. Although the absorption rate of CO₂ is lower in TEA solution than primary or secondary amines, CO₂ loading was found higher in the solution. Less reactivity of TEA towards CO₂ was also observed. The impedance results showed that, increased concentration of TEA in aqueous solution helps to reduce charge transfer resistance and thus facilitates CO₂ reduction process.

• Periodical: Advanced Materials Research (Volume 1109)
• Pages: 448-450
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1109.448
• Online since: June 2015
• Authors: Md. Rakibul Hasan, Sharifah Bee binti O. A. Abdul Hamid*, Wan Jefrey Basirun
• Keywords: Carbon Dioxide, Graphene-Titania Composite, Photoelectrocatalysis, Solar Simulator, TEA

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