Kumari Sonia, Sandhu Navjot, Saraswat Vandana, Sarkar Tarun Kanti
Department of Chemistry, UIS, Chandigarh University, Mohali, Punjab 140413, India.
Division of Chemistry, School of Basic Sciences, Galgotias University, Greater Noida, Uttar Pradesh 203201, India.
Langmuir. 2025 May 20;41(19):12150-12165. doi: 10.1021/acs.langmuir.5c00885. Epub 2025 May 5.
l-Tyrosine-based eco-friendly nitrogen-doped carbon dots have been synthesized using citric acid and isoniazid as precursors along with l-tyrosine via a facile one-pot hydrothermal approach for the corrosion mitigation of mild steel (MS) in HCl solution (15%). The authenticity of the synthesized carbon dots has been established using various spectroscopic techniques such as X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), and Fourier transform infrared (FT-IR) spectroscopy. The inhibition behavior was studied using gravimetric analysis, electrochemical measurements, and surface analysis. The potentiodynamic polarization revealed that the N-doped carbon dots act as a mixed-type corrosion inhibitor; that is, it can act as both a cathodic as well as an anodic inhibitor, with the corrosion efficiency of 99.3% at the concentration of 150 ppm. N-CDs protect the metal surface by forming a layer that is particularly physisorbed as confirmed by Δ values.
以L-酪氨酸为基础的环保型氮掺杂碳点已通过简便的一锅水热法合成，该方法使用柠檬酸、异烟肼作为前驱体，并与L-酪氨酸一起用于在15%盐酸溶液中减缓低碳钢（MS）的腐蚀。已使用各种光谱技术（如X射线光电子能谱（XPS）、X射线衍射（XRD）、高分辨率透射电子显微镜（HR-TEM）和傅里叶变换红外（FT-IR）光谱）确定了合成碳点的真实性。使用重量分析、电化学测量和表面分析研究了缓蚀行为。动电位极化表明，氮掺杂碳点作为混合型缓蚀剂；也就是说，它既可以作为阴极缓蚀剂，也可以作为阳极缓蚀剂，在150 ppm浓度下腐蚀效率为99.3%。如Δ值所证实，N-CDs通过形成一层特别物理吸附的层来保护金属表面。
