Three-dimensional chemically reduced graphene oxide templated by silica spheres for ammonia sensing

Comparative study on gas sensing by a Schottky diode electrode prepared with graphene–semiconductor–polymer nanocomposites

“…[8][9][10][11][12][13][14] Water-soluble graphene oxide (GO) has a unique heterogeneous electronic structure because of the presence of mixed sp 2 and sp 3 hybridizations. 9,[18][19][20] Poly-GO composites have been recently employed as electrical contacts in organic solar cells 9,21,22 and light-emitting diodes, 18,20 as an electrode in batteries, 23,24 within the hydrogen evolution reaction, 25 as supercapacitors, 26 as gas and chemical sensors [27][28][29][30][31][32] and as transistors. 33 For sensing applications, poly-GO composites hold great promise because of the large surface area of the GO akes.…”

Recent Advances in Ammonia Gas Sensors Based on Carbon Nanomaterials

“…Here, rGO plays the role of the adsorption material to capture the ammonia molecules. Huang et al [ 189 ] developed a 3D framework of rGO using silica as a template, showing an enhanced response of 31.5% to 50 ppm NH 3 , which was significantly higher than the 2D rGO network with a response of 1.5%.…”

Advanced Carbon Functional Materials for Superior Energy Storage

“…In 1 M Na 2 SO 4 , the carbon demonstrated a remarkable electrochemical efficiency with a specific capacitance of 298 F g −1 at 0.5 A g −1 and magnificent cycling endurance at 5 A g −1 after 10,000 cycles with only 2% capacitance loss. Tofu consists of moisture, carbohydrates, proteins, and trace concentration of minerals; it is an available resource and is considered as a renewable fuel for nitrogen and carbon [16,22]. Not long ago, scientists have stated the molten salt synthesis of strongly (N-doped) porous carbon which may be obtained from tofu, in which LiCl/KCl (45/55 in weight) is a eutectic mixture (which functioned as the activator) was used as the solvent to dilute LiNO 3 .…”

“…In 1 M H 2 SO 4 , supercapacitors based on porous carbon (from frozen tofu) revealed 243 F g −1 specific capacitance, and in BMIMBF4/AN, it showed an extraordinary power density of about 72 W h kg −1 at an ordinary 889 W kg −1 energy density. Such carbonization procedure offers a potentially helpful strategy from abundant supportable resources to design carbon electrode materials with supreme execution for supercapacitors and LIBs, respectively [6,11,16,22].…”