In situ simultaneous chemical activation and exfoliation of carbon quantum dots for atmospheric adsorption of H2S and CO2 at room temperature

Latest technological advances and insights into capture and removal of hydrogen sulfide: a critical review

“…On the other hand, Yu et al 174 used ZIF-8 to develop N-rich mesoporous carbon nanosheets (N-MCNS). Remarkably, N-MCNS have outperformed those in previous studies from Chen et al 172 and Fakhraie et al 173 by exhibiting an excellent adsorption capacity of 510 mg g −1 and a large surface area of 1937 m 2 g −1 . On the other hand, Wang et al 175 integrated polyethyleneimine into MCNS to form MCNS-PEI with different loading percentages ranging from 0 to 65 wt%.…”

“…Chen et al 172 prepared N-rich porous carbons that shows higher breakthrough capacities as the CN/CS ratio increases from 0.5 to 1, which become lower after the ratio increases to 2. Furthermore, Fakhraie et al 173 synthesized KOH-activated high N-doped ACs (HNAC) at 800 °C over 1 h. Among the synthesized adsorbents, HNAC-802 was proven to have the best adsorption capacity at 316.35 mg g −1 with a 2.17 selectivity for H 2 S/CO 2 . On the other hand, Yu et al 174 used ZIF-8 to develop N-rich mesoporous carbon nanosheets (N-MCNS).…”

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

“…H 2 S molecules interact with active adsorption sites and saturate a signi cant portion of the open metal sites during initial gas adsorption, resulting in poor cyclic behavior. Due to its corrosive nature, H 2 S has been attributed to irreversible con nement between H 2 S molecules and open metal sites [92]. Finally, compared with MIL-101(Cr)@NIPs@H 2 S adsorbent, MIL-101(Cr)@MIPs@H 2 S Nano adsorbent not only can be used as a promising adsorbent with high regeneration for long-term adsorption-desorption operation, but also has high stability because H 2 S is gaseous.…”

Hydrogen sulfide capture and removal technologies: A comprehensive review of recent developments and emerging trends

“…The breakthrough capacities are reported to be 99.03% and 86.3% of the initial value after one and five regeneration runs, respectively. Fakhraie et al [303] prepared activated carbons with high nitrogendoping (HNAC) derived from nitrogen-rich carbon quantum dots (N-CQDs) after high-temperature activation with KOH. The pore structures of HNACs differed for different activation temperatures, activation times, and KOH/N-CQD mass ratios.…”