A few-layered graphene on alumina nanofibers for electrochemical energy conversion

Quantifying Graphitic Edge Exposure in Graphene-Based Materials and Its Role in Oxygen Reduction Reactions

“…The C 1s spectra exhibit a sharp peak at 284.3 eV with additional contributions at higher binding energies as shown in Figure 2B-D. A best fit of the C 1s envelope was obtained using 5 contributions at 284.3, 285.1, 286.1, 288.9 and 291.2 eV that can be attributed to trigonally bonded carbon (sp 2 centers), tetrahedrally bonded carbon (sp 3 centers), C-O/C=O carbon, carboxylic acid groups and π-π* shake up peaks, respectively. 29 A summary of the % composition for sp 2 , sp 3 and oxidised carbon centers is reported in Table 1. The sp 3 contribution remains constant at ~15% for all samples, however, the sp 2 concentration increases from 63% for G-ANF-1 to 70 and 69% for G-ANF-3 and G-ANF-7, respectively.…”

Graphene-encapsulated aluminium oxide nanofibers as a novel type of nanofillers for electroconductive ceramics

“…Bundle of the aluminium oxide nanofibers (ANFs), used as a support and described in detail elsewhere [10][11][12] consists of the fibres with an average single fibre diameter of ∼7 nm and a length of 4-6 cm having a specific surface area of 155 m 2 g −1 .…”

“…Using this hierarchical structure allows for improved distribution of graphene and therefore the efficiency of use. To build this "hierarchical structure", we developed a simple one-step CVD method that uses a hot-walled chemical vapour deposition procedure at 1000 • C and atmospheric pressure [11], which is summarized in Fig. 1.…”

Graphene-carbon nanotube papers for energy conversion and storage under sunlight and heat

“…Temperatures were detected using a FLIR Therma Vision A40 m infrared thermometer. (1), and b) the hybrid graphene film consisted of graphene oxide(GO) sheets and multiwalled carbon nanotubes (MWCNTs) (2). These samples were prepared by vacuum filtering a graphene oxide (GO) solution and a GO/MWCNTs solution, respectively, followed by further hydriodic acid (HI) reduction (Fig.…”