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Title

Hybrid Ni@ZnO@ZnS‐microalgae for circular economy: A smart route to the efficient integration of solar photocatalytic water decontamination and bioethanol production

AuthorsSerrà, Albert; Artal, Raül; García‐Amorós, Jaume; Sepúlveda, Borja CSIC ORCID; Gómez, Elvira; Nogués, Josep CSIC ORCID; Philippe, Laetitia
Issue Date2020
PublisherWiley-VCH
CitationAdvanced Science 7(3): 1902447 (2020)
AbstractWater remediation and development of carbon‐neutral fuels are a priority for the evermore industrialized society. The answer to these challenges should be simple, sustainable, and inexpensive. Thus, biomimetic‐inspired circular and holistic processes combing water remediation and biofuel production can be an appealing concept to deal with these global issues. A simple circular approach using helical Spirulina platensis microalgae as biotemplates to synthesize Ni@ZnO@ZnS photocatalysts for efficient solar water decontamination and bioethanol production during the recycling process is presented. Under solar irradiation, the Ni@ZnO@ZnS‐Spirulina photocatalyst exhibits enhanced activity (mineralization efficiency >99%) with minimal photocorrosion and excellent reusability. At the end of its effective lifetime for water remediation, the microalgae skeleton (mainly glycogen and glucose) of the photocatalyst is recycled to directly produce bioethanol by simultaneous saccharification and fermentation process. An outstanding ethanol yield of 0.4 L kg−1, which is similar to the highest yield obtained from oxygenic photosynthetic microorganisms, is obtained. Thus, the entire process allows effective solar photocatalytic water remediation and bioethanol production at room temperature using simple and easily scalable procedures that simultaneously fixes carbon dioxide, thereby constituting a zero‐carbon‐emission circular process.
Publisher version (URL)https://doi.org/10.1002/advs.201902447
URIhttp://hdl.handle.net/10261/218769
DOI10.1002/advs.201902447
E-ISSN2198-3844
Appears in Collections:(CIN2) Artículos




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