A Microporous Graphitized Biocarbon with High Adsorption Capacity toward Benzene Volatile Organic Compounds (VOCs) from Humid Air at Ultralow Pressures

Abstract

Adsorption studies of vaporous benzene and toluene on a novel microporous graphitized biocarbon material (MGBC) were investigated in this study. The MGBC has high surface area (>2080 m 2 /g) and uniform microporosity (6.8−8.8 Å). The adsorbed amounts of benzene and toluene on the MGBC are ∼3−5 times higher than those on zeolites and some metalorganic framework (MOF) adsorbents (i.e., MIL-101, HKUST-1, and UIO-66) at 80 Pa. Results of the desorption activation energy and isosteric heat indicate a strong affinity of the MGBCs for benzene/toluene molecules, because of its uniform micropores size and graphitic N/C in MGBC structure. Moreover, the MGBC possesses a hydrophobic character, and thus leads to a preferential adsorption for toluene over H 2 O. Therefore, the MGBC shows a much higher working capacity for toluene than MIL-101(Cr) and commercial activated carbons (ACs) in moderate humidity.

The synergistic effect of oxygen-containing functional groups on CO2 adsorption by the glucose–potassium citrate-derived activated carbon

“…2a, the isotherms of activated carbons derived from both KOH and PC methods can be regarded as type I according to IUPAC classication, indicating that micropores were the majority in the porous structure. 24,25 However, a distinct hysteresis loop for PGC-900 was observed, suggesting that the mesopores generated with the increase in carbonization temperature. 26 This can also be conrmed from the data in Table 1, which suggest that the mesopore volume of the PGC samples gradually increased with the rise in temperature.…”

Novel Hierarchical Fe(III)-Doped Cu-MOFs With Enhanced Adsorption of Benzene Vapor

“…They are derived from various industrial processes and applications of chemical products. The emissions of VOCs have caused severe environmental and healthy issues causing cancer and death (Zhu et al, 2016, 2019; Meng et al, 2019). Therefore, the reduction of VOCs emissions is of great significance.…”

Porous Fe@C Composites Derived from Silkworm Excrement for Effective Separation of Anisole Compounds

“…These values can determine their degree of graphitization. 36 The I D / I G values of Fe@C-2 (1.14) and Fe@C-1 (1.08) are obviously lower than that of the SE-C sample (1.77), confirming a higher degree of graphitization in the Fe@C samples because of the introduction of Fe species during the calcination. 37,38 This enriched graphitic carbon in the newly designed Fe@C composites may also have catalytic properties.…”