具有高抑制效率的N,S-编码碳量子点:在酸性环境中对碳钢的腐蚀缓解的影响
Cong Shen1,2,3, Shaomu Wen2,3,4, Jing Yan1,2,3
1Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu 610213, China.
Langmuir : the ACS journal of surfaces and colloids
|October 29, 2024
概括
和硫编的碳量子点 (CQD) 能够有效地抑制碳钢在硫酸中的腐蚀. 这些环保的CQD通过联合物理吸收和化学吸收显示出高效率,为减轻腐蚀提供了有前途的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 腐蚀科学 腐蚀科学
背景情况:
- 碳量子点 (CQD) 以其环保性,经济可行性和高效率而闻名.
- CQD显示出作为腐蚀抑制剂的巨大潜力,特别是在酸性环境中.
研究的目的:
- 通过简单的一步热水方法合成和硫编的CQD (N,S-CQD).
- 为了评估N,S-CQDs在0.5M硫酸溶液中的碳钢上的防腐性能.
- 阐明N,S-CQDs的吸附机制和抑制行为.
主要方法:
- 使用l-cysteine和4-aminosalicylic acid进行N,S-CQDs的一步热水合成.
- 使用光谱学和传输电子显微镜 (TEM) 进行N,S-CQD的表征.
- 通过减重测量,电化学技术 (例如,电动极化,电化学阻抗光谱) 和表面分析来评估腐蚀抑制.
主要成果:
- 成功合成和表征了N,S-CQDs.
- 实现了高抑制效率:97.9%在293K和98.9%在313K与150ppm的N,S-CQDs.
- 吸附行为遵循兰格穆尔等温法,表明了物理吸附和化学吸附的组合.
结论:
- 密封式CQD是碳钢在酸性介质中的高度有效的腐蚀抑制剂.
- 抑制机制涉及物理吸收和化学吸收.
- 在工业应用中,N,S-CQD为减轻腐蚀提供了一个有希望的,可持续的解决方案.
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