Fe3O4 Functionalized Multi-Walled Carbon Nanotubes: Synthesis, Characterization, and Investigation for Photocatalysis Activity of CO2 Conversion to Methanol
نویسندگان
1 Tashkent Institute of Chemical Technology (TICT), Tashkent, Uzbekistan
2 National Pedagogical University of Uzbekistan named after Nizami. Tashkent, Uzbekistan
3 Andijan State Medical Institute, Andijan, Uzbekistan
4 Samarkand State Medical University, Samarkand, Uzbekistan.
5 Bukhara State Medical Institute named after Abu Ali ibn Sino, Bukhara, Uzbekistan
6 Tashkent State University of Economics, Tashkent, Uzbekistan
7 Tashkent State Technical University, Tashkent, Uzbekistan
8 Kyrgyz-Uzbek International University named after Batyraly Sydykov, Republic of Kyrgyzstan.
9 Tashkent Institute of Chemical Technology (TICT), Tashkent, Uzbekistan
10 Karakalpak Scientific Research Institute of Natural Sciences of the Karakalpak Branch of the Academy of Sciences of the Republic of Uzbekistan
11 Bukhara State Medical Institute named after Abu Ali ibn Sino, Bukhara, Uzbekistan
12 Urgench State University, Urgench, Uzbekistan
13 Mamun University, Khiva, Uzbekistan
doi
10.22052/JNS.2025.03.021چکیده
The synthesis, characterization, and photocatalytic performance of Fe₃O₄-functionalized multi-walled carbon nanotubes (MWCNTs) for CO₂ conversion into valuable chemicals such as methanol was investigated. Highlighting the critical environmental issue of rising greenhouse gases, particularly CO₂, the study emphasizes the importance of developing efficient photocatalysts for sustainable energy solutions and environmental remediation. The experimental section details the acid functionalization of MWCNTs, followed by hydrothermal synthesis of Fe₃O₄ nanoparticles on their surface. Characterization techniques including FE-SEM, FT-IR, and XRD confirmed the successful formation of uniform Fe₃O₄ nanoparticles with high crystallinity and surface reactivity. Photocatalytic tests under visible light demonstrated that Fe₃O₄-MWCNT composites exhibit superior activity, achieving a methanol formation rate of 0.171 mmol g⁻¹ h⁻¹ after 3.8 hours, significantly higher than pure MWCNTs and Fe₃O₄ alone. The results suggest that the synergistic effects between Fe₃O₄ nanoparticles and MWCNTs enhance charge separation and transfer, leading to improved catalytic efficiency. The study concludes that Fe₃O₄-functionalized MWCNTs present a promising platform for scalable CO₂ reduction, with future challenges focused on improving stability, selectivity, and synthesis uniformity. Advances in nanostructure engineering, hybrid material design, and mechanistic understanding are essential for optimizing these nanocomposites for practical environmental and energy applications, contributing to the global effort against climate change and for renewable energy development.
