摘要：Novel NaCo
xO
y adsorbents were fabricated by air calcination of (Na,Co)-organic frameworks at 700 °C. The NaCo
xO
y crystallized as hexagonal microsheets of 100–200 nm thickness with the presence of some polyhedral nanocrystals. The surface area was in the range of 1.15–1.90 m
2 g
−1. X-ray photoelectron spectroscopy (XPS) analysis confirmed Co
2+ and Co
3+ sites in MOFs, which were preserved in NaCo
xO
y. The synthesized adsorbents were studied for room-temperature H
2S removal in both dry and moist conditions. NaCo
xO
y adsorbents were found ~ 80 times better than the MOF precursors. The maximum adsorption capacity of 168.2 mg g
−1 was recorded for a 500 ppm H
2S concentration flowing at a rate of 0.1 L min
−1. The adsorption capacity decreased in the moist condition due to the competitive nature of water molecules for the H
2S-binding sites. The PXRD analysis predicted Co
3S
4, CoSO
4, Co
3O
4, and Co(OH)
2 in the H
2S-exposed sample. The XPS analysis confirmed the formation of sulfide, sulfur, and sulfate as the products of H
2S oxidation at room temperature. The work reported here is the first study on the use of NaCo
xO
y type materials for H
2S remediation.
