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Fe δ+ diaspora titanium dioxide and graphene: A study of conductive powder materials and coating applications

Journal of Colloid and Interface Science, ISSN: 0021-9797, Vol: 684, Issue: Pt 1, Page: 512-522
2025
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Article Description

Developing new conductive primers to ensure electrostatic spraying is crucial in response to the call for lightweight production of new energy vehicles. We report a stabilized material, Fe–T/G, of Fe-doped TiO 2 composite graphene synthesized by a simple hydrothermal and electrostatic self-assembly method. The resistivity decreases from 0.9165 Ω·cm to 0.0943 Ω·cm for T/G. XPS and EPR confirm that Fe 3+ is doped into the TiO 2 lattice to generate OVs, and Fe δ+ is introduced to activate the surrounding Fe–Ti active sites to break the obstruction of the Ti–O bond and build the Ti–O–C and Fe δ+ –O–C bonds between TiO 2 and graphene to connect the two tightly. Multiple electron transfer channels promote Fe δ+ impurity energy levels in the TiO 2 valence and conduction bands to build electron leaping pathways, enhancing the electron transport ability. Based on this, Fe–T/G can be used as a conductive coating material to develop various insulator surfaces. With Fe–T/G powder material and PVDF, a conductive primer coating can be made and overlaid on a plastic plate to simulate actual applications. The resistance can still be maintained below 25 Ω·cm. Through contact angle experiments, it has been confirmed that the superhydrophobic surface has a water contact angle of 142.8°, with self-cleaning potential.

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