Fast and efficient electrical–thermal responses of functional nanoparticle decorated nanocarbon aerogels

Abstract

Joule heating characteristics of functional nanoparticles decorated nanocarbon aerogels are systemically investigated in terms of electrical-thermal responses. Studies verify that nanocarbon aerogels are exceptional supporting and electric-conducting monolithic frameworks for...

Density-Induced Joule-Heating Characteristics of Nanocarbon Aerogels: Implications for Tunable Electrothermal Behaviors

“…XRD patterns were collected to gain insights into the structural information (Figure S2). Notably, two characteristic (002) and (100) diffraction peaks were observed in the rGO samples, which is in accordance with previous reports on graphene aerogel materials . The BET surface area and pore-size distribution of the nanocarbon aerogels were analyzed using the nitrogen adsorption/desorption method (Figure a).…”

“…Notably, two characteristic (002) and (100) diffraction peaks were observed in the rGO samples, which is in accordance with previous reports on graphene aerogel materials. 60 The BET surface area and pore-size distribution of the nanocarbon aerogels were analyzed using the nitrogen adsorption/desorption method (Figure 2a). The type IV nitrogen adsorption/desorption curves indicated the presence of abundant mesoporous structures in the as-synthesized rGO aerogels.…”

Facile Synthesis of Electrically Conductive and Heatable Nanoparticle/Nanocarbon Hybrid Aerogels

“…33 The peaks attributed to the Ni 2+ oxidation state of the thermally reduced samples were caused by the oxidation of nickel under an air atmosphere. Similarly, the two oxidized aluminum species (i.e., Al(OH) 3 and Al 2 O 3 ) in the LDH precursor were completely converted into aluminum oxide under the thermal treatment conditions, 1,14 as seen in the slight shift of the binding energy at around 75 eV, due to charge transfer between the nanocarbon and the metal oxides (Figure 8c). The successful reduction of GO in the NiAl-LDH/GO aerogel to rGO in the Temperature-Swing Joule Heating Simulations.…”

“…When combined with the functional nanoparticles, the interconnected graphitic microstructure of the conductive support framework allows uniform local electrical resistive heating that covers the entire hybrid aerogel structure, leading to more homogeneous, faster, and energy-efficient heating, compared to the traditional radiative heating process. The formation of robust and hierarchical microchannels in the hybrid aerogels offers advantages of large surface areas, diverse porosities, outstanding mechanical properties, excellent thermal conductivities, and efficient material recycling . On the other hand, the nanocarbon support framework also effectively inhibits nanoparticle aggregation during material fabrication, thus helping in exposing more effective reaction sites.…”

“…The formation of robust and hierarchical microchannels in the hybrid aerogels offers advantages of large surface areas, diverse porosities, outstanding mechanical properties, excellent thermal conductivities, and efficient material recycling. 14 On the other hand, the nanocarbon support framework also effectively inhibits nanoparticle aggregation during material fabrication, thus helping in exposing more effective reaction sites. In this study, CuAl-LDH was used as the precursor for the synthesis of Cu-Al 2 O 3 nanoparticles and was embedded into a 3D rGO aerogel support framework in the preparation of multifunctional porous hybrid materials that exhibit enhanced performance and unique features of energy-efficient, direct local resistive heating.…”