Increased magnetization of reduced graphene oxide by nitrogen-doping

Enhanced Thermal Oxidation Stability of Reduced Graphene Oxide by Nitrogen Doping

“…[5d] The effect of temperature on N content needs further investigation because some authors have observed the inverse trend. [15] The sample nitrided at 500 8C shows the highest N content reported to date in N-doped RGO obtained by annealing GO under NH 3 . Previous works, using NH 3 and employing thermal, [5d, 11] microwave, [12] and hydrothermal [5c] treatments have achieved N-doping levels of 2 %, 5 % and 7.2 %, respectively.…”

Tuning the nature of nitrogen atoms in N-containing reduced graphene oxide

“…Chemical functionalization and doping are an efficient way to tailor the physical and chemical behaviour of materials. [4,5] In this context, N-doping is an interesting approach since this not only allows n-type doping [6] and improves its performance in electrocatalysis, [7,8] supercapacitors, [9] sensors [10] or as magnetic material, [11,12] but also confers enhanced thermal stability; [13] thus extending its potential in fuel cell applications and other fields where high temperatures are required. [4, 14, 15] Different methods have been explored to introduce nitrogen either (i) during the synthesis of the graphene sheets via chemical vapour deposition (CVD) [16] and arc discharge, [17] or (ii) via a post synthesis modification.…”

Sulfur Doping Induces Strong Ferromagnetic Ordering in Graphene: Effect of Concentration and Substitution Mechanism

“…Such addition produces adatoms situated above and below the graphene sheet, which may also generate localized spins. Up to now, doping of the graphene structure has been achieved with boron, nitrogen, fluorine, and sulfur . In the case of fluorine and boron substitution, paramagnetic centers with S = 1/2 were shown to emerge without any apparent establishment of a magnetically ordered state at low temperatures .…”