Modulation of titanium dioxide/graphene interface by Mg2+doping: Titanium dioxide coatings with conductive, corrosion-resistant and superhydrophobic features

作     者：Liu, Ze Zhou, Kexin Wang, Junbo Peng, Chong Li, Yun Yang, Shuyi Tao, E. 

作者机构：Bohai Univ Inst Ocean Res Inst Environm Res Coll Chem & Mat EngnLiaoning Key Lab Chem Clean P Jinzhou 121013 Liaoning Peoples R China Baoti Huashen Titanium Ind Co Ltd Jinzhou 121000 Liaoning Peoples R China Yantai Univ Chem & Chem Engn Coll Yantai 264005 Shandong Peoples R China Dalian Univ Technol Sch Chem Engn State Key Lab Fine Chem Dalian 116024 Liaoning Peoples R China 

出 版 物：《ENERGY》 (Energy)

年 卷 期：2025年第317卷

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：Liaoning Province (Jinzhou) Fur Green Manufacturing Industry Technology Innovation Strategic Alliance Application basic projects of the Science and Technology Department of Liaoning: Development and application of purification technology of titanium tetrachloride via boiling chlorination [2023020228-JH2/1013] 

主　　题：Mg 2+doping Graphene Coating Electrical conductivity First-principles computation 

摘      要：Conductive coatings show great application potential in the fields of electronic devices, energy storage and conversion, and primers for new energy vehicles, but their performance bottlenecks such as corrosion resistance, hydrophobicity, and dispersibility limit their wide applications. In order to solve these problems, this paper innovatively proposes a conductive coating (Mg-TG) composite of titanium dioxide and graphene via Mg2+ modification in the acetic acid system. By precisely modulating the doping amount of Mg2+, the electronic structure and physical properties of titanium dioxide are significantly optimised, and an efficient conductive network is formed with graphene, successfully constructing a high-performance composite powder with a low resistivity as low as 0.083 Omega cm. Advanced characterisation techniques (XPS) and density-functional-theoretic calculations (DFT) indicate that the formation of defective engineering activates lattice oxygens, leading to electronic structure modulation and material valence bonding changes, thus constructing efficient electron transport channels (Ti-O-C, Mg-O-C) and ensuring uniform distribution and fast electron circulation in the coating. In addition, through the Tafel curve test, water contact angle test (WCA) and coating experiments, it was demonstrated that the Mg2+ modification effectively improved the corrosion resistance, hydrophobicity and dispersibility of the material. In this way, the coating not only effectively resists the ability of corrosive media and extends its service life, but also maintains stable electrical properties in humid environments and avoids performance degradation due to moisture penetration. At the same time, the modification of Mg2+ also promotes the uniform dispersion of the material and improves the activity and stability of the coating, laying a solid foundation for efficient performance in a variety of application scenarios.