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

Md. Arif Hossen, Fatema Khatun, Riyadh Ramadhan Ikreedeegh, Aamina Din Muhammad, Azrina Abd Aziz (), Kah Hon Leong (), Lan Ching Sim, Wu Lihua and Minhaj Uddin Monir
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Md. Arif Hossen: Faculty of Civil Engineering Technology, Universiti Malaysia Pahang, Gambang 26300, Pahang, Malaysia
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
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

Energies, 2023, vol. 16, issue 14, 1-20

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.

Keywords: photocatalytic CO 2 reduction; CH 4 production; TNTAs; Au NPs; RGO; LSPR effect (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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