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Enhanced Photocatalytic CO 2 Reduction to CH 4 Using Novel Ternary Photocatalyst RGO/Au-TNTAs

Author

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  • Md. Arif Hossen

    (Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia
    Center for Environmental Science & Engineering Research, Chittagong University of Engineering and Technology, Chattogram 4349, Bangladesh)

  • Fatema Khatun

    (Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia)

  • Riyadh Ramadhan Ikreedeegh

    (Department of Analysis and Quality Control, Sarir Oil Refinery, Arabian Gulf Oil Company, Benghazi P.O. Box 263, Libya
    Chemical Reaction Engineering Group (CREG), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Johor, Malaysia)

  • Aamina Din Muhammad

    (Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia)

  • Azrina Abd Aziz

    (Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia)

  • Kah Hon Leong

    (Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Kampar 31900, Perak, Malaysia)

  • Lan Ching Sim

    (Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang 43200, Selangor, Malaysia)

  • Wu Lihua

    (Kuantan Sunny Scientific Collaboration Sdn. Bhd. Suites 7.23, 7th Floor, Imbi Plaza, Jalan Imbi, Kuala Lumpur 55100, Kuala Lumpur, Malaysia)

  • Minhaj Uddin Monir

    (Department of Petroleum and Mining Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh)

Abstract

Photocatalytic CO 2 reduction into hydrocarbon fuels is one of the most efficient processes since it serves as a renewable energy source while also lowering atmospheric CO 2 levels. The development of appropriate materials and technology to attain greater yield in CO 2 photoreduction is one of the key issues facing the 21st century. This study successfully fabricated novel ternary reduced graphene oxide (RGO)/Au-TiO 2 nanotube arrays (TNTAs) photocatalysts to promote CO 2 photoreduction to CH 4 . Visible light-responsive RGO/Au-TNTAs composite was synthesized by facile electrochemical deposition of Au nanoparticles (NPs) and immersion of RGO nanosheets onto TNTAs. The synthesized composite has been thoroughly investigated by FESEM, HR-TEM, XRD, XPS, FT-IR, UV-Vis DRS, and PL analyzer to explain structural and functional performance. Under the source of visible light, the maximum yield of CH 4 was attained at 35.13 ppm/cm 2 for the RGO/Au-TNTAs composite photocatalyst after 4 h, which was considerably higher by a wide margin than that of pure TNTAs, Au-TNTAs and RGO-TNTAs. The CO 2 photoreduction of the RGO/Au-TNTAs composite has been improved due to the combined effects of Au NPs and RGO. Due to its surface plasmonic resonance (SPR) mechanism, Au NPs play a crucial role in the absorption of visible light. Additionally, the middle RGO layers serve as effective electron transporters, facilitating better separation of electron-hole pairs. The newly constructed composite would be a promising photocatalyst for future photocatalytic applications in other fields.

Suggested Citation

  • Md. Arif Hossen & Fatema Khatun & Riyadh Ramadhan Ikreedeegh & Aamina Din Muhammad & Azrina Abd Aziz & Kah Hon Leong & Lan Ching Sim & Wu Lihua & Minhaj Uddin Monir, 2023. "Enhanced Photocatalytic CO 2 Reduction to CH 4 Using Novel Ternary Photocatalyst RGO/Au-TNTAs," Energies, MDPI, vol. 16(14), pages 1-20, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:14:p:5404-:d:1195077
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    References listed on IDEAS

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    1. A Reum Lee & Jae-Yup Kim, 2020. "Highly Ordered TiO 2 Nanotube Electrodes for Efficient Quasi-Solid-State Dye-Sensitized Solar Cells," Energies, MDPI, vol. 13(22), pages 1-10, November.
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