Graphene-carbon nanotube hybrids as robust, rapid, reversible adsorbents for organics

The Application of Carbon Nanotube/Graphene‐Based Nanomaterials in Wastewater Treatment

“…a) Transmission electron microscope (TEM) image of thin‐layered graphene. Reproduced with permission 12a. Copyright 2017, Elsevier.…”

“…f) TEM image of GNHs showing CNTs in the interlayer of graphene. Reproduced with permission 12a. Copyright 2017, Elsevier.…”

“…Duoni et al12b,65 reported the fabrication of a CNT‐alumina mixture as extruded strips to fabricate mesoporous CNT‐alumina strips (CASs) ( Figure a) with a higher mechanical strength of 126.73 N cm −1 than that of AC strips (97.46 N cm −1 3a) (Figure g). The extruded CASs formed a compact structure, which vastly reduced the material loss compared to that of pristine CNT powders.…”

“…Research on CNTs and graphene for wastewater treatment has involved the adsorption mechanism of the adsorbates on the CNTs or graphene, nanomaterial functionalization, and making composite adsorbents for different wastewater systems 3a,12. Some studies addressed the probability that CNTs or graphene with fixed quantities can be used infinitely for certain wastewater systems.…”

Carbon nanotube-alumina strips as robust, rapid, reversible adsorbents of organics

“…[16][17][18][19][20][21][22][23] However, the macroscopic structure should remain stable under the operating conditions for adsorption methods, especially during scale up of the method. This is not an easy task, because the macroscopic structures of CNTs or graphene always swelled aer adsorbing organics, 6,7,24 resulting in an unstable or even failed operation. In addition, the structures of CNT-based adsorbents should meet the requirements of reversible utilization in adsorption and desorption performance, 24 because their cost is too high to use them only once.…”