Novel photoactive inorganic polymer composites of inorganic polymers with copper(I) oxide nanoparticles
Source abstract
Abstract
Novel photoactive composites of cubic Cu2O nanoparticles with aluminosilicate geopolymers were prepared and their structure was shown by SEM/EDS and TEM. XRD, FTIR, 27Al and 29Si MAS NMR to consist of a well-reacted geopolymer matrix containing homogeneously dispersed Cu2O nanoparticles. Under dark conditions, both the geopolymer matrix and the composites were shown to adsorb a model organic compound (methylene blue, chosen for its colour stability at high pH) by a process which follows pseudo-first-order kinetics and can be described by Langmuir-type isotherms. At concentrations >20 wt%, the oxide decreases the adsorption rate by blocking the active adsorption sites of the geopolymer. Under UV radiation, the composites remove the methylene blue by a combination of adsorption and photodegradation, without deterioration of the geopolymer structure or the photoactive Cu2O component, as evidenced by 63Cu NQR spectroscopy, suggesting that these geopolymer composites should function as useful new materials for the removal of organic pollutants from water or the atmosphere.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Electronic and Structural Properties of Oxides
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