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<p>This study successfully synthesized Graphene Oxide (GO) using a modified Hummers’ method and doped it with La<sub>2</sub>O<sub>3</sub> at varied percentages. The synthesized materials were characterized using BET surface area, BJH pore volume, powder X-ray diffraction, Raman spectroscopy, temperature-programmed desorption of CO<sub>2</sub>, field emission scanning electron microscopy, and X-ray photoelectron spectroscopy. The synthesized La<sub>2</sub>O<sub>3</sub>/r-GO adsorbents were evaluated for CO<sub>2</sub> adsorption under different temperature settings at atmospheric pressure. At a temperature of 25&#xa0;°C, the adsorbent 15La<sub>2</sub>O<sub>3</sub>/r-GO, with a pore volume of 1.85&#xa0;cm³/g, demonstrated a superior adsorption capacity of 5.37 mmol/g under ambient circumstances compared to conventional materials, owing to its elevated BET surface area of 123&#xa0;m²/g and basicity of 0.621 mmol/g. The high adsorption effectiveness can be attributed to the greater number of basic sites on the adsorbent and an increased surface area. This adsorbent demonstrated remarkable adsorption performance and high CO<sub>2</sub> adsorption efficacy after five cycles in recyclability studies, indicating its durability.</p>

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Fabrication of porous La2O3/r-GO nano composites for enhanced post combustion CO2 capture

  • 期刊论文

  • 发表日期：

    2025年11月13日

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  • Srinath Goskula,
  • Sripal Reddy Gujjula,
  • Suresh Siliveri,
  • Suman Chirra,
  • Venkatathri Narayanan

摘要

This study successfully synthesized Graphene Oxide (GO) using a modified Hummers’ method and doped it with La2O3 at varied percentages. The synthesized materials were characterized using BET surface area, BJH pore volume, powder X-ray diffraction, Raman spectroscopy, temperature-programmed desorption of CO2, field emission scanning electron microscopy, and X-ray photoelectron spectroscopy. The synthesized La2O3/r-GO adsorbents were evaluated for CO2 adsorption under different temperature settings at atmospheric pressure. At a temperature of 25 °C, the adsorbent 15La2O3/r-GO, with a pore volume of 1.85 cm³/g, demonstrated a superior adsorption capacity of 5.37 mmol/g under ambient circumstances compared to conventional materials, owing to its elevated BET surface area of 123 m²/g and basicity of 0.621 mmol/g. The high adsorption effectiveness can be attributed to the greater number of basic sites on the adsorbent and an increased surface area. This adsorbent demonstrated remarkable adsorption performance and high CO2 adsorption efficacy after five cycles in recyclability studies, indicating its durability.