A Simple Solid-solid Reaction for the Synthesis of Lead sulfide-montmorillonite Hybrid
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Abstract
The hybrid materials of lead sulfide with montmorillonite were synthesized by a solid-solid reaction between lead-exchanged montmorillonite and sodium sulfide at ambient condition. The hybrids were characterized by powder X-ray diffraction (XRD), thermogravimetric-differential thermal analysis (TG-DTA). The basal spacing of heat-treated lead sulfide-montmorillonite-sodium sulfide (200oC) was 1.20 nm. The formation of lead sulfide in the hybrid confirmed by the non-resolved absorption band and absorption onset at 328 and 508 nm, respectively for heat-treated lead sulfide-montmorillonite-sodium sulfide. The dramatic blue-shifted in the absorption onset relative to that of bulk was observed.The heat treated lead sulfide-montmorillonite-sodium sulfide showed an emission peak at 367 nm. The removal of adsorbed water resulted in the increasing intensity of the hybrid.
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References
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