Novel Graphene/In2O3 Nanocubes Preparation and Selective Electrochemical Detection for L-Lysine of Camellia nitidissima Chi

Abstract

In this work, novel graphene/In2O3 (GR/In2O3) nanocubes were prepared via one-pot solvothermal treatment, reduction reaction, and successive annealing technology at 600 °C step by step. Interestingly, In2O3 with featured cubic morphology was observed to grow on multi-layered graphene nanosheets, forming novel GR/In2O3 nanocubes. The resulting nanocomposites were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), etc. Further investigations demonstrated that a selective electrochemical sensor based on the prepared GR/In2O3 nanocubes can be achieved. By using the prepared GR/In2O3-based electrochemical sensor, the enantioselective and chem-selective performance, as well as the optimal conditions for L-Lysine detection in Camellia nitidissima Chi, were evaluated. The experimental results revealed that the GR/In2O3 nanocube-based electrochemical sensor showed good chiral recognition features for L-lysine in Camellia nitidissima Chi with a linear range of 0.23–30 μmol·L−1, together with selectivity and anti-interference properties for other different amino acids in Camellia nitidissima Chi.

Facile Synthesis of Solvent Sensitive Fluorinated Graphene Nanoscrolls and Application as a Cathode Material for Lithium Ion Batteries

“…In this work, we used graphite fluoride (C1Fx) as the starting material. By using modified Hummers method [20][21] , fluorinated graphene oxide (FGO) nanosheets with abundant oxygen-containing groups was obtained. The obtained FGO intermediate was reduced by hydrazine hydrate under reflux conditions, giving commonly reported fluorinated graphene nanosheets (Scheme 1) [22] .…”

“…Fluorinated graphene oxide (FGO, showed in Scheme 1) was prepared by modified Hummers method [21][22] . In a typical procedures, graphite fluoride powder (1.5 g, 325 mesh, C1Fx, x=0.5, 0.6, 0.8 and 1.1 etc.)…”

A New Pyrroloquinoline-Derivative-Based Fluorescent Probe for the Selective Detection and Cell Imaging of Lysine

“…Thus, the development of analytical methods for the detection of lysine is of significance for medical and biological research. Some analytical techniques have been used to detect lysine, including colorimetric method [11][12][13][14], liquid chromatography [15] and thin-layer chromatography [16], mass spectrometry [17], luminescent sensors [18], amperometric biosensors [19,20], electrochemical detection [21][22][23][24], and fluorescent probes [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. In these methods, fluorescent probes feature high sensitivity and selectivity-satisfactory capability compared with other complicated methods-having been studied by more researchers.…”