A high yield of environmentally friendly N,S-codoped (N,S-CDs) and N-doping carbon points (N-CDs) carbon dots was achieved through a biochemical oxidation reaction at room temperature in this study. Acetaldehyde, sodium hydroxide, benzotriazole (BTA), and 2-mercaptobenzimidazole (MB) with a similar structure were used as raw materials. The microstructure and properties of the corrosion inhibitor for Q235 steel were evaluated by various experiments. The results demonstrated enhanced corrosion inhibition rates of the N,S-CDs compared to the N-CDs using electrochemical tests (93.83% vs 77.65%) and weight loss experiments (96.35% vs 91.65%) at 50 mg/L, respectively, compared to the blank material, indicating that N,S codoping can significantly improve the corrosion inhibition effect of carbon dots. The significant improvements were attributed to the formation of dense adsorption films and the hydrophobic properties of N and S-CDs nanoparticles on the steel surface, leading to an effective barrier against corrosion. The findings from this study provide important experimental data for potential industrial applications and hold important practical value in the field of pickling corrosion inhibitors.

中文翻译：

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N,S 共掺杂碳点增强 Q235 钢的腐蚀抑制：工业酸洗缓蚀剂的可持续方法

本研究通过室温下的生化氧化反应实现了高产率的环保型N,S共掺杂（N,S-CDs）和氮掺杂碳点（N-CDs）碳点。以乙醛、氢氧化钠、苯并三唑（BTA）和结构相似的2-巯基苯并咪唑（MB）为原料。通过各种实验评价了Q235钢缓蚀剂的显微组织和性能。结果表明，与 N-CD 相比，在 50 mg/L 浓度下，N,S-CD 的腐蚀抑制率分别为 93.83% 和 77.65%，重量损失实验（96.35% 和 91.65%）。与空白材料相比，表明N、S共掺杂可以显着提高碳点的缓蚀效果。显着的改善归因于钢表面致密吸附膜的形成以及N和S-CD纳米颗粒的疏水特性，从而形成有效的防腐蚀屏障。该研究结果为潜在的工业应用提供了重要的实验数据，在酸洗缓蚀剂领域具有重要的实用价值。