Fabrication of graphene nanoplatelets-supported SiOx-disordered carbon composite and its application in lithium-ion batteries

Azo dye functionalized graphene nanoplatelets for selective detection of bisphenol A and hydrogen peroxide

“…This LOD is lowerthan what was obtained in some other electrochemical methods, e.g., molecularly imprinted chitosan-graphene composite modified electrode (∼6 nM)54 and almost similar to the results obtained using single-walled carbon nanotubes conjugated with β-cyclodextrin (1.0 nM) 55 or reduced graphene oxide/carbon nanotube/gold nanoparticles nanocomposite functionalized screen-printed electrode (0.8 nM)36 . The peak current of BPA oxidation is linear over two BPA concentration ranges of: 10 nM to 100 nM ݅ = 3.4 ‫ܥ‬ − 0.007 ሺܴ ଶ = 0.9994ሻ and 100 nM to 25 µM.…”

“…This LOD is lower than what was obtained in some other electrochemical methods, e.g., molecularly imprinted chitosangraphene composite modied electrode ($6 nM) 54 and almost similar to the results obtained using single-walled carbon nanotubes conjugated with b-cyclodextrin (1.0 nM) 55 or reduced graphene oxide/carbon nanotube/gold nanoparticles nanocomposite functionalized screen-printed electrode (0.8 nM). 36 The performance comparison of our sensor and several that have been reported in the literature (Table 2) indicate that our sensor reports low LOD and wide linear range and could potentially be used for sensitive detection of BPA. Furthermore, our sensor also exhibited better stability and reproducibility with relative standard deviation (RSD) of 0.46% for ve successive measurements of 10 mM BPA on the same electrode and in pH 7.0 PBS.…”

“…The observed oxidation peak could be attributed to the anodic oxidation of the aromatic ring in BPA and the formation of resonance via a two-electron and two-proton process, and can be illustrated by Scheme 2. 14 The resulting products form during the oxidation are very unstable in the presence of nucleophiles and react immediately with aqueous solvent to form (I), 36 which is a likely reason why electrochemically irreversible oxidation process was observed for BPA (Scheme 2).…”

Watermelon‐Like Structured SiOx–TiO2@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

“…After 600 cycles consisting of 20 pre‐cycling at 0.1 A g −1 followed by fast cycling at 1 A g −1 , the SiO x –TiO 2 @C electrode exhibits a stable reversible capacity of ≈700 mAh g −1 without any obvious degradation, demonstrating outstanding long‐term cyclability at high rate condition. Compared with the reported SiO x ‐based anodes prepared by wet‐chemistry routes recently (Table S1, Supporting Information), the prepared SiO x –TiO 2 @C electrode shows high specific capacity and superior rate capability. The excellent electrochemical performance suggests a great promise of the proposed particle architecture.…”

Silica from diatom frustules as anode material for Li-ion batteries

“…34,35 These structures might be benecial to Li-ion batteries by easing electrolyte penetration and shortening the diffusion path for Li-ions between the electrolyte and the active material. 36,37 One research group has previously reported the use of diatom frustules as active material in Li-ion batteries. [38][39][40] Here, the diatom frustules were used in combination with red algae as anode material.…”