Synthesis and Characterization of Fe₃O₄/N-RGO-Based Composite for CO₂ Adsorbent Candidate Material

The concentration of CO 2 in the atmosphere continues to increase from year to year. This can cause serious environmental problems, such as global warming and climate change. The application of Carbon Capture Storage (CCS) technology with potential adsorbent materials is used as an effective effort to reduce CO 2 concentration. This research aimed to synthesize Fe 3 O 4 /N-RGO composites as potential candidates for CO 2 adsorbent materials. Another objective was to determine the effect of composite formation on Fe 3 O 4 and the impact of nitrogen doping on RGO for CO 2 adsorption activity on its surface. The characteristics of the synthesized materials were analyzed using FTIR and SEM. The FTIR results showed that the functional groups of N-RGO (C=N, C=C, C-OH, C-O-C, and C-N) and Fe 3 O 4 (Fe-O) had been identified in the FTIR spectrum of the Fe 3 O 4 /N-RGO composite. The SEM results confirmed these data, which showed that Fe 3 O 4 particles had been successfully inserted into the N-RGO sheets. In the CO 2 adsorption test, the adsorption percentage of Fe 3 O 4 , RGO, N-RGO, and Fe 3 O 4 /N-RGO composites were 0.2097%, 0.0377%, 0.2435%, and 0.3188%, respectively. These data show that the formation of composites on Fe 3 O 4 and nitrogen doping on RGO can increase the CO 2 adsorption activity on its surface. Based on the results of FTIR testing methods 1 and 2, the adsorption mechanism of Fe 3 O 4 and Fe 3 O 4 /NRGO are chemisorption, RGO is physisorption, and N-RGO is both physisorption and chemisorption.