Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume -, Issue -, Pages -Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670836.2023.2196478
Keywords
Dickite; urea intercalation; layer expansion; adsorption performance
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A dickite with an expanded layer structure was prepared by co-calcination of the dickite-urea intercalation complex, urea, and potassium chlorate. The expansion degree of the dickite layer was regulated by the mass ratio (P/I) of potassium chlorate to the intercalation complex. XRD and SEM results showed that with the increase of the P/I ratio, the (002) diffraction intensity of expanded dickite gradually weakened and the degree of layer expansion gradually increased. When the P/I ratio exceeded 0.375, the expanded dickite exhibited an accordion-like porous morphology. The layer expansion of dickite increased its specific surface area, mesopore volume, and absolute zeta-potential, enhancing the adsorption capacity of methylene blue.
A dickite with an expanded layer structure was prepared by the co-calcination of the dickite-urea intercalation complex, urea, and potassium chlorate at 450 degrees C. The expansion degree of the dickite layer could be regulated by the mass ratio (P/I) of potassium chlorate to the intercalation complex. XRD and SEM results showed that with the increase of the P/I ratio, the (002) diffraction intensity of expanded dickite gradually weakened and the degree of layer expansion gradually increased. When the P/I ratio exceeded 0.375, the expanded dickite exhibited an accordion-like porous morphology. The layer expansion of dickite exposed more internal layer surfaces, which was conducive to increasing the specific surface area, mesopore volume, and absolute zeta-potential, thus enhancing the adsorption capacity of methylene blue.
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