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In this work, the stability of different alginate hydrogels semi\u2010interpenetrated with poly(3,4\u2010ethylenedioxythiophene):polystyrene sulfonate conducting polymer (Alg\/PEDOT), which acts as a photothermal absorber is examined. More specifically, the behavior of Alg\/PEDOT hydrogels ionically and covalently crosslinked with Ca<jats:sup>2+<\/jats:sup> ions and glyoxal, respectively, has been compared when used as water purification platforms. The homogenous porosity and higher cycling capacity of the glyoxal\u2010crosslinked gels provide superior performance for water\u2010steam generation under sunlight irradiation than that of the ionically stabilized gel. Furthermore, increasing the glyoxal cross\u2010linking reaction time prove to have little effect on the porosity and the efficiency of freshwater supply from an artificial seawater solution. 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