Abstract
Exploring the design of zinc molybdate pigments to optimize their properties is an interesting work. Three types of zinc molybdate, amorphous ZnMoO4, Zn5Mo2O11·5H2O, and β-ZnMoO4, were synthesized by regulating the synthesis conditions. Experimental results revealed that the monoclinic β-ZnMoO4 possessing a distorted octahedral [ZnO6]/[MoO6] cluster structure exhibited the optimal anticorrosion and photocatalytic properties. Then, the synergistic anticorrosion mechanisms of β-ZnMoO4 were proposed: multilayer shielding layer protection and photoelectrons suppression effect of anodic reaction. Next, three surfactants, sodium dodecyl sulfate (SDS), cetyltrimethylammonium bromide (CTAB), and polyvinylpyrrolidone (PVP-K30), were employed to modulate the growth of β-ZnMoO4. Experimental data showed that the induced modulation of PVP-K30 could greatly increase the specific surface area and photoelectrons production efficiency of β-ZnMoO4. Besides, the charge transfer resistance of β-ZnMoO4-P (synthesized with PVP-K30) was 25.58 times higher than that of β-ZnMoO4-0 (synthesized without surfactant) after 72 h of immersion in 3.50 wt.% NaCl solution. Consequently, the design strategy of zinc molybdate pigments provides a reference for the improvement of performance of other inorganic anticorrosion pigments in industry.
Published Version
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