Home > News > Industry news
The "memory effect" represents LDH's most distinctive structural property, enabling thermally activated structural reconstruction that delivers adsorption performance unmatched by conventional adsorbents. When LDH undergoes controlled calcination at 400-550°C, it loses interlayer water and anions, decomposing into amorphous mixed metal oxides (LDO) with high specific surface area and abundant surface defects. When this calcined material contacts aqueous solutions containing anions, it spontaneously reconstructs the original layered hydroxide structure, forcibly incorporating target anions into the reforming interlayer galleries during this structural recovery process.
In industrial adsorption applications, this reconstruction-driven mechanism creates powerful thermodynamic driving force for anion capture—calcined Zn-Al LDH achieves over 120 mg/g adsorption capacity for hexavalent chromium, 3-4x higher than uncalcined LDH. Nanjing Mission New Materials Co.,Ltd has optimized calcination protocols for industrial LDO adsorbents, balancing crystallinity loss and reconstruction capability for maximum adsorption performance in heavy metal remediation, phosphate removal from eutrophic water, and radioactive waste treatment. Unlike MXene requiring oxidative stabilization or MOF materials sensitive to aqueous environments, LDH/LDO systems maintain performance through hundreds of adsorption-regeneration cycles.
Leave your message