SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 60 ›› Issue (8): 212-227.DOI: 10.1016/j.cjche.2023.01.015

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Enhanced adsorption of target branched compounds including antibiotic norfloxacin frameworks on mild steel surface for efficient protection: An experimental and molecular modelling study

Lingli Chen1, Yueting Shi1, Sijun Xu1, Junle Xiong2, Fang Gao1, Shengtao Zhang1, Hongru Li1   

  1. 1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;
    2. Chongqing Kunding Environmental Protection Technology, Co., Ltd, Chongqing 400044, China
  • Received:2022-08-27 Revised:2023-01-16 Online:2023-10-28 Published:2023-08-28
  • Contact: Fang Gao,E-mail:fgao@cqu.edu.cn;Shengtao Zhang,E-mail:stzhang@cqu.edu.cn;Hongru Li,E-mail:hrli@cqu.edu.cn
  • Supported by:
    We greatly thank the National Natural Science Foundation of China (21376282, 21676035, 21878029). We also thank Chongqing Science and Technology Commission (2022NSCQ-MSX1298), H. Li thanks China Postdoctoral Science Foundation (22012T50762 & 2011M501388). Y. Shi. thanks Graduate Student Research Innovation Project, Chongqing University (CYB18046). We also thank Dr. Shenying Xu for his warm help on the molecular geometry optimization. The authors thank the warm help from Analytical and Testing Center of Chongqing University.

Enhanced adsorption of target branched compounds including antibiotic norfloxacin frameworks on mild steel surface for efficient protection: An experimental and molecular modelling study

Lingli Chen1, Yueting Shi1, Sijun Xu1, Junle Xiong2, Fang Gao1, Shengtao Zhang1, Hongru Li1   

  1. 1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;
    2. Chongqing Kunding Environmental Protection Technology, Co., Ltd, Chongqing 400044, China
  • 通讯作者: Fang Gao,E-mail:fgao@cqu.edu.cn;Shengtao Zhang,E-mail:stzhang@cqu.edu.cn;Hongru Li,E-mail:hrli@cqu.edu.cn
  • 基金资助:
    We greatly thank the National Natural Science Foundation of China (21376282, 21676035, 21878029). We also thank Chongqing Science and Technology Commission (2022NSCQ-MSX1298), H. Li thanks China Postdoctoral Science Foundation (22012T50762 & 2011M501388). Y. Shi. thanks Graduate Student Research Innovation Project, Chongqing University (CYB18046). We also thank Dr. Shenying Xu for his warm help on the molecular geometry optimization. The authors thank the warm help from Analytical and Testing Center of Chongqing University.

Abstract: In this study, an approach was proposed to employ new target branched compounds (TBCs) including multiple antibiotic norfloxacin frameworks for intensified adsorption films to achieve super protection of mild steel in HCl medium. Thus, the TBCs containing bis/tri norfloxacin skeletons were synthesized by multi-step preparation route. In addition, the reference linear compound (RLC) including a single norfloxacin part was also synthesized. The chemical structures of these compounds were confirmed by various means. It was demonstrated that the TBCs could form the tough adsorption films on the surface of mild steel, which could be processed mainly through chemisorption effect. The electrochemical analysis suggested that the TBCs displayed superior corrosion inhibition performance for low carbon steel in 1.0 mol·L-1 HCl solution over the RLC (RLC, 87.80%; TBC1, 97.63%; TBC2, 98.35%), which was further understood by the molecular modelling. The isotherm adsorption plots were employed to analyze the spontaneous adsorption process of the TBCs on low carbon steel surface, and a prominent chemisorption could be inferred by the standard Gibbs free energy changes of the adsorption.

Key words: Branched compounds, Norfloxacin part, Adsorption, Anticorrosion, Mild steel

摘要: In this study, an approach was proposed to employ new target branched compounds (TBCs) including multiple antibiotic norfloxacin frameworks for intensified adsorption films to achieve super protection of mild steel in HCl medium. Thus, the TBCs containing bis/tri norfloxacin skeletons were synthesized by multi-step preparation route. In addition, the reference linear compound (RLC) including a single norfloxacin part was also synthesized. The chemical structures of these compounds were confirmed by various means. It was demonstrated that the TBCs could form the tough adsorption films on the surface of mild steel, which could be processed mainly through chemisorption effect. The electrochemical analysis suggested that the TBCs displayed superior corrosion inhibition performance for low carbon steel in 1.0 mol·L-1 HCl solution over the RLC (RLC, 87.80%; TBC1, 97.63%; TBC2, 98.35%), which was further understood by the molecular modelling. The isotherm adsorption plots were employed to analyze the spontaneous adsorption process of the TBCs on low carbon steel surface, and a prominent chemisorption could be inferred by the standard Gibbs free energy changes of the adsorption.

关键词: Branched compounds, Norfloxacin part, Adsorption, Anticorrosion, Mild steel