Nitrogen/Sulfur Co‐Doped Carbon Dots for Enhancing Anti‐Corrosion Performance of Mg Alloy in NaCl Solution

Abstract

To reduce the corrosion of Mg alloy, an environment-friendly Nitrogen/Sulfur co-doped carbon dots (N/S-CDs) was prepared using thiourea and 4-amino salicylic acid as precursors. The corrosion inhibition behavior of N/S-CDs for Mg alloy in 3.5 wt.% NaCl solution was systematically investigated by electrochemical measurements. The results shown that N/S-CDs could suppress the corrosion of Mg alloy and the inhibition efficiency reached 86.6 % at 50 mg L À 1 . The low energy gap (0.156 eV) and high dipole moment (11.19 D) indicated that N/ S-CDs has a strong chemical adsorption on Mg by quantum chemistry calculation. Meanwhile, the adsorption process is conformed to the Langmuir adsorption isotherm, belonging to the physical/chemical mixed adsorption.

Fluorescent Carbon Dots from Bamboo Stem Waste: Synthesis, Characterization, and Inkjet Printing

“…in 2004, during the synthesis and purification of single‐walled carbon nanotubes, has attracted much interest during the last two decades [1] . The CDot structure with a spherical carbon core surrounded by various chemical functional groups and size below 10 nm [1–2] has aroused interest as a fluorophore in a multitude of applications, including optoelectronics, [2b] energy conversion/storage, [3] bioimaging, [4] sensing, [5] anti‐counterfeiting, [6] anti‐corrosion, [7] etc. Currently, research to improve the material properties of CDot by varying solvents, synthesis conditions, dopants, and fluorescence enhancement occupies a crucial pursuit [1] .…”