Graphene‐based macromolecular assemblies as high-performance absorbents for oil and chemical spills response and cleanup

Aerogels Made of Few-Layer WS2 Nanosheets and Nitrogen-Doped Graphene for Photocatalytic Degradation of Caffeine

“…22,23 Such local deformations severely modify the surface chemistry and the associated physicochemical attributes of graphene, which, in turn, consequently refine the bulk properties of the ensuing 3D N-doped graphene materials. 53 It is for this reason that NGA demonstrates a nearly 2-fold increase in the percentage removal of caffeine (67%) with respect to GA (Figure 8a). Meanwhile, the adornment of GA with FL-WS 2 , having indirect band gap of 1.35 eV, 54 enhances the photocatalytic performance by approximately 4% compared to that of NGA (Figure 8a).…”

“…Attractively, these local semiconducting domains exhibit a switchover from p-type to n-type behavior upon replacement of the O-containing groups with N-based clusters. Specifically, the introduction of N with electronegativities different from those of C reorganizes the electrons within the honeycomb lattice, leading to extensive distortion of the chiral symmetry of reticular graphene sheets. , Such local deformations severely modify the surface chemistry and the associated physicochemical attributes of graphene, which, in turn, consequently refine the bulk properties of the ensuing 3D N-doped graphene materials . It is for this reason that NGA demonstrates a nearly 2-fold increase in the percentage removal of caffeine (67%) with respect to GA (Figure a).…”

Three-Dimensional Highly Porous MoS2/Graphene Aerogel for Visible-Light-Driven Photocatalytic Degradation of Tetracycline

“…However, standard procedures for constructing 3D architectures of 2D materials result in pores of various dimensions with random spatial distribution, which undermines the pollutant infiltration rate and impedes rapid adsorption. 9 Obviously, this has potentially important implications in surface-related phenomena like heterogeneous photocatalysis because the target species first diffuse and adsorb on the catalyst surface from the bulk phase and then react with the photogenerated electrons and holes, ultimately affecting the overall photocatalytic reaction rate. 11 A precise and facile control over the pore geometry of 3D photocatalytic systems, including the average pore width, pore size distribution (PSD), and pore connectivity, is therefore highly desirable from a practical standpoint to enhance the mass transfer and boost the kinetics of the photocatalytic degradation process.…”

MoS2 Nanoflowers Decorated on Graphene Aerogels for Visible-Light-Driven Photocatalytic Degradation of Tetracycline

“…This is conceivable because the seamlessly interconnected channels of GA favor light harvesting via multireflection of incident light as well as effectively suppress recombination of electron−hole pairs through provisioning of multidimensional electron transport pathways. 25−28 All these, in supplement to other beneficial structural features of GAs (such as ultralow density, exceptional corrosion resistance, outstanding flexibility, and superior durability), 29,30 may reasonably be expected to holistically improve the photocatalytic efficiency of MoS 2 .…”

“…Because the ultimate performance of any photocatalyst depends greatly on its morphology and structural dimensionality, perhaps a more effective strategy to overcome the aforementioned limitations of MoS 2 would be the in situ deposition of MoS 2 -based nanostructures on a 3D self-supporting porous scaffold, such as graphene aerogel (GA). This is conceivable because the seamlessly interconnected channels of GA favor light harvesting via multireflection of incident light as well as effectively suppress recombination of electron–hole pairs through provisioning of multidimensional electron transport pathways. − All these, in supplement to other beneficial structural features of GAs (such as ultralow density, exceptional corrosion resistance, outstanding flexibility, and superior durability), , may reasonably be expected to holistically improve the photocatalytic efficiency of MoS 2 .…”