Structural behaviours of nanoporous carbon fabricated from rice husk

Structural behaviors in water adsorbing phenomena on nanoporous carbon fabricated from waste rice husk

“…It implied the existence of an ordered assembly structure (graphite nanocrystals) by adsorbing nitrogen, which was consistent with the structural model proposed by the previous report. 17) From the continuously increasing of the N 2 adsorption and the slight hysteresis, the results suggested multilayer adsorption occurred at the mesopores over 2 nm. 34) Moreover, the micropore filling was observed at the initial part of isotherms (P/P 0 < 0.1), as reported before.…”

“…43) These results were further substantiated by Komatsu et al, which reported the pore structure depending on the size of adsorbed molecules, and interlayer distance fluctuated during the adsorption. 17) Consequently, this shift mostly corresponds to the arrange graphitic crystallites in activated carbon at ambient conditions. The role of the relatively disordered adsorbed water between the imperfect hexagons networks was attributed to its interlayer distance, which was also suggested in Shiryaev, 44) Namasivayam.…”

“…1. 17) The results suggest that the NPC consisted of an unstable turbostratic structure and pore structures by introducing adsorbed materials. It corresponded to the measured spacing value of 0.345-0.376 nm in the case of the water, which differed from the adsorbed materials.…”

“…These results also have been confirmed in the previous study. 17) However, it is interesting to note that NPC firstly shows the opposite structural behavior between 1.6 and 0.33 nm and returns to its origin after thoroughly drying.…”

“…To study structural changes, except for XRD 17) and TEM, 18) a wide range of techniques are currently used: small-angle X-ray scattering (SAXS), 19) small-angle neutron scattering, 20) and gas adsorption/desorption analysis. 21) Each of these methods has its advantages and disadvantages.…”