Graphene – carbon nanotube – Mn 3 O 4 mesoporous nano-alloys as high capacity anodes for lithium-ion batteries

Vitamin Derived Nitrogen Doped Carbon Nanotubes for Efficient Oxygen Reduction Reaction and Arsenic Removal from Contaminated Water

“…The deconvoluted N1s spectra shown as inset in Figure 2c exhibit two broad peaks that are centered at 398.8 and 401.4 eV, which correspond to pyridinic-N (N connected to two C) and graphitic-N (N connected to three C), whereas the minor peak at 401.2 eV can be attributed to pyrrolic-N (N part of a pentagon ring connected to two C). The nitrogen adsorption isotherms of the graphene oxide and Fe@NCNT-rGO plotted in Figure 2d exhibit the type I/II characteristics, especially in Fe@NCNT-rGO, which has marginally higher surface area of 758.88 m 2 g −1 and a more pronounced hysteresis loop in the P/P 0 range of ≈ 0.1-0.89, which indicates the presence of extensive micro/nano pores that are attributed to the 'spacer' functionality of CNT inhibits the restacking of reduced graphene oxide [26]. Figure 3a exhibits the electrochemical behavior of our newly developed vitamin B 3 derived nitrogen doped CNTs on rGO were tested in nitrogen and oxygen saturated 0.1 M KOH electrolytes and the CV plot.…”

Preparation and Characterization of Macroalgae Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

“…In the XRD pattern of AKB, the diffraction peaks were mainly concentrated between 20° and 60°, the peaks that were located at 29.5°, 35.2°, 39.5°, 43.0°, and 47.6° could be indexed to the (203), (301), (205), (304), and (305) planes of carbon black (JCPDS22-1069), indicating that the as-prepared kelp biochar nanomaterial might be an excellent electrical conductor with effective photocatalytic performance, which could promote the migration rate of photogenerated carriers and decelerate the electron-hole recombination [ 35 , 36 ]. Two main peaks that were located at 2θ = 23.0° and 29.34°, which could be indexed to calcite according to the JCPDS database No.81-2027.…”

Preparation and electrochemical properties of graphene‐supported Si‐TiO2 nanospheres as anode material for Li‐ion batteries

“…[15][16][17] Graphene is often used in LIB anode material because of its advantages of large surface area, good electrical conductivity, and high electron mobility. [18][19][20] In addition, graphene-supported silicon composites exhibited not only more excellent cycling performance, but also higher specific capacity. 21 Thus, in this paper, to improve reversible capacity and cycle stability of TiO 2 nanospheres, we take such measures.…”

“…Recently, Many Si‐based materials have been successfully synthesized to improve the cycling performance due to the synergy effect between active materials and silicon . Graphene is often used in LIB anode material because of its advantages of large surface area, good electrical conductivity, and high electron mobility . In addition, graphene‐supported silicon composites exhibited not only more excellent cycling performance, but also higher specific capacity …”