化工学报 ›› 2023, Vol. 74 ›› Issue (8): 3446-3456.DOI: 10.11949/0438-1157.20230555

• 表面与界面工程 • 上一篇    下一篇

开心果壳基碳点的合成及其对Q235碳钢的缓蚀行为研究

陈佳起(), 赵万玉, 姚睿充, 侯道林, 董社英()   

  1. 西安建筑科技大学化学与化工学院,陕西 西安 710311
  • 收稿日期:2023-06-08 修回日期:2023-08-14 出版日期:2023-08-25 发布日期:2023-10-18
  • 通讯作者: 董社英
  • 作者简介:陈佳起(1999—),男,硕士研究生,chenjiaqi@xauat.edu.cn
  • 基金资助:
    国家自然科学基金项目(21575111);陕西省重点研发计划一般项目(2020GY-306)

Synthesis of pistachio shell-based carbon dots and their corrosion inhibition behavior on Q235 carbon steel

Jiaqi CHEN(), Wanyu ZHAO, Ruichong YAO, Daolin HOU, Sheying DONG()   

  1. School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an 710311, Shaanxi, China
  • Received:2023-06-08 Revised:2023-08-14 Online:2023-08-25 Published:2023-10-18
  • Contact: Sheying DONG

摘要:

为实现废弃果壳的合理利用及绿色缓蚀剂的制备,采用水热法分别合成了开心果壳碳点(pvs-CDs)及开心果壳-酒石酸复合碳点(pt-CDs),通过傅里叶红外光谱、X射线电子能谱、透射电子显微镜及荧光光谱对所制备的碳点进行表征,以电化学方法及失重法测试其缓蚀性能。结果表明,所制备的碳点对Q235碳钢在1 mol·L-1盐酸中的缓蚀效率均达90.0%以上,其中pt-CDs缓蚀性能更为优异。电化学阻抗谱表明pt-CDs对浸泡6 h后碳钢的缓蚀效率可达94.5%,这主要归因于其在碳钢表面吸附形成保护膜,显著增加了碳钢腐蚀反应活化能。同时荧光光谱和差分紫外光谱法证实pt-CDs与Fe3+的强相互作用,可进一步促进其在碳钢表面的吸附,这为探索生物质碳点类缓蚀剂的研究提供了思路。

关键词: 生物质, 碳点, 腐蚀, 纳米材料, Q235碳钢

Abstract:

To achieve the sustainable utilization of waste shells and develop eco-friendly carbon dots (CDs) corrosion inhibitors, the pistachio shell carbon dot (pvs-CDs) and pistachio shell-tartaric acid carbon dot (pt-CDs) were synthesized. The as-prepared CDs were characterized by using Fourier infrared spectroscopy, X-ray electron spectroscopy, transmission electron microscopy and fluorescence spectroscopy. The corrosion inhibition properties of synthesized CDs were evaluated by the electrochemical method. The results show that the corrosion inhibition efficiency of the prepared carbon dots on Q235 carbon steel in 1 mol·L-1 hydrochloric acid is above 90.0%, and the corrosion inhibition performance of pt-CDs is more excellent. Electrochemical impedance spectroscopy showed that the corrosion inhibition efficiency of pt-CDs on carbon steel after soaking for 6 h could reach 94.5%, which was mainly due to the formation of a protective film on the surface of carbon steel, which significantly increased the activation energy of corrosion reaction of carbon steel. The superior corrosion inhibition performance of pt-CDs can be attributed to the formation of a protective film on the surface of carbon steel, which is facilitated by the strong adsorption ability of pt-CDs. The established film effectively increases the activation energy of the carbon steel corrosion reaction, leading to superior corrosion inhibition properties. Fluorescence spectroscopy and differential UV-Vis spectra analyses were performed to investigate the interaction between pt-CDs and Fe3+, which can significantly enhance the adsorption of pt-CDs onto the carbon steel surface. This study will provide an idea to explore the research of biomass CDs-based corrosion inhibitors.

Key words: biomass, carbon dots, corrosion, nanomaterials, Q235 carbon steel

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