Oxygen vacancies tuning over Co3O4 nanosheet preferentially growing (2 2 0) facet for efficient Hg0 removal from flue gas

Cobalt Oxide-Decorated on Carbon Derived from Onion Skin Biomass for Li-Ion Storage Application

“…The Raman spectra of both Co-COS (1 M) and Co-A-COS (1 M) are illustrated in Figure 2b. Notably, the initial prominent Raman peak detected at approximately 670 cm −1 in both samples can be attributed to the A 1g phonon mode in Co 3 O 4 [42,43]. Additionally, the Raman bands observed at approximately 1337 and 1559 cm −1 correspond to the D and G bands often observed in defective graphitic structures [44,45], indicative of the A 1g and E 2g vibrational modes of the biomass-derived carbon, respectively, within the Co 3 O 4 /C nanocomposites.…”

“…As can be observed, the diffraction peaks of Co3O4 in Co-A-COS (1 M) are sharper and narrower than those of Co-COS (1 M), indicating that the Co3O4 phase decorated on the activated carbonized onion skin (A-COS) has a greater crystallinity than the one fabricated using a non-activated material sample (COS).The Raman spectra of both Co-COS (1 M) and Co-A-COS (1 M) are illustrated in Figure2b. Notably, the initial prominent Raman peak detected at approximately 670 cm⁻ 1 in both samples can be attributed to the A1g phonon mode in Co3O4[42,43]. Additionally, the Raman bands observed at approximately 1337 and 1559 cm⁻ 1 correspond to the D and G bands often observed in defective graphitic structures[44,45], indicative of the A1g and E2g vibrational modes of the biomass-derived carbon, respectively, within the Co3O4/C nanocomposites.…”