N, S-Codoped Carbon Quantum Dots with High Inhibition Efficiency: Implications for Corrosion Mitigation of Carbon Steel in Acidic Environments

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2024-10-29 DOI:10.1021/acs.langmuir.4c02552

Cong Shen, Shaomu Wen, Jing Yan, Zhipeng Ai, Lin Mo, Yang Qing

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Abstract

The environmental friendliness, economic feasibility, and high efficiency of carbon quantum dots (CQDs) render them as highly promising candidates for corrosion inhibitors. The present study proposed the fabrication of nitrogen- and sulfur-codoped CQDs via an one-step hydrothermal method using l-cysteine and 4-aminosalicylic acid as precursors. The structure, particle size, and surface ligands of the prepared CQDs were determined through spectroscopy and transmission electron microscopy characterization. Subsequently, the inhibition performance of the CQDs on carbon steel in a 0.5 M sulfuric acid solution was evaluated through weight loss measurement, electrochemical methods, and surface analysis. The CQDs exhibited remarkable inhibition efficiencies of 97.9% at 293 K and 98.9% at 313 K, with a concentration of 150 ppm. In addition, the obtained CQDs demonstrated a combined physisorption and chemisorption adsorption behavior, which complied with the Langmuir adsorption isotherm. These findings provide insight into the inhibition mechanism and highlight the potential of codoped CQDs for corrosion mitigation applications in acidic environments.

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具有高抑制效率的 N、S-掺杂碳量子点：在酸性环境中缓解碳钢腐蚀的意义

碳量子点（CQDs）具有环境友好性、经济可行性和高效性等特点，是一种极具潜力的缓蚀剂。本研究以 l-半胱氨酸和对氨基水杨酸为前驱体，通过一步水热法制备了掺氮和掺硫的碳量子点。通过光谱和透射电子显微镜表征确定了所制备 CQDs 的结构、粒度和表面配体。随后，通过失重测量、电化学方法和表面分析，评估了 CQDs 在 0.5 M 硫酸溶液中对碳钢的抑制性能。浓度为 150 ppm 的 CQDs 在开氏 293 度和开氏 313 度的抑制率分别为 97.9% 和 98.9%。此外，所获得的 CQDs 表现出物理吸附和化学吸附相结合的吸附行为，符合 Langmuir 吸附等温线。这些发现有助于深入了解抑制机理，并凸显了共掺杂 CQDs 在酸性环境中缓蚀应用的潜力。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).