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One-pot synthesis of ZnO nanoparticles supported on halloysite nanotubes for catalytic applications
https://orcid.org/0000-0002-0836-9318
https://orcid.org/0000-0003-1953-5817
https://orcid.org/0000-0003-4183-2252
https://orcid.org/0000-0001-8705-8763
Abstract A versatile catalyst based on halloysite and zinc oxide (HNT@ZnO) was prepared, for the first time, starting from ZnO commercial bulk form as Zn precursor source, in a one-pot procedure. This strategy gives the possibility to obtain small ZnO nanoparticles loaded on the HNT surface without the use of inorganic salts which envisage the removal of undesired anions and therefore a calcination process at high temperature. It was found that the presence of halloysite improved the UV–vis spectral absorption ability of ZnO. The hybrid was successful used as photocatalyst for the methylorange and rhodamine B degradation. In addition, after eight consecutive cycles for the methylorange photodegradation, the hybrid did not exhibit significant reduction in its photocatalytic performances confirming its stability. Based on trapping experiments and calculated energy bands we also proposed a photocatalytic mechanism. Furthermore, to evaluate the versatility of the synthetized HNT@ZnO hybrid, we used it as catalyst for biodiesel production from soybean oil, too. Also, in this case, the hybrid showed good catalytic performance and recyclability.
Graphical abstract Display Omitted
Highlights A heterogeneous catalyst based on halloysite and ZnO was prepared and characterized. The hybrid showed excellent photocatalytic activity towards dyes degradation. The hybrid showed good performances in biodiesel production from natural oils. The catalyst was successful recycled in both reactions.
One-pot synthesis of ZnO nanoparticles supported on halloysite nanotubes for catalytic applications
https://orcid.org/0000-0002-0836-9318
https://orcid.org/0000-0003-1953-5817
https://orcid.org/0000-0003-4183-2252
https://orcid.org/0000-0001-8705-8763
Abstract A versatile catalyst based on halloysite and zinc oxide (HNT@ZnO) was prepared, for the first time, starting from ZnO commercial bulk form as Zn precursor source, in a one-pot procedure. This strategy gives the possibility to obtain small ZnO nanoparticles loaded on the HNT surface without the use of inorganic salts which envisage the removal of undesired anions and therefore a calcination process at high temperature. It was found that the presence of halloysite improved the UV–vis spectral absorption ability of ZnO. The hybrid was successful used as photocatalyst for the methylorange and rhodamine B degradation. In addition, after eight consecutive cycles for the methylorange photodegradation, the hybrid did not exhibit significant reduction in its photocatalytic performances confirming its stability. Based on trapping experiments and calculated energy bands we also proposed a photocatalytic mechanism. Furthermore, to evaluate the versatility of the synthetized HNT@ZnO hybrid, we used it as catalyst for biodiesel production from soybean oil, too. Also, in this case, the hybrid showed good catalytic performance and recyclability.
Graphical abstract Display Omitted
Highlights A heterogeneous catalyst based on halloysite and ZnO was prepared and characterized. The hybrid showed excellent photocatalytic activity towards dyes degradation. The hybrid showed good performances in biodiesel production from natural oils. The catalyst was successful recycled in both reactions.
One-pot synthesis of ZnO nanoparticles supported on halloysite nanotubes for catalytic applications
https://orcid.org/0000-0002-0836-9318
https://orcid.org/0000-0003-1953-5817
https://orcid.org/0000-0003-4183-2252
https://orcid.org/0000-0001-8705-8763
Abstract A versatile catalyst based on halloysite and zinc oxide (HNT@ZnO) was prepared, for the first time, starting from ZnO commercial bulk form as Zn precursor source, in a one-pot procedure. This strategy gives the possibility to obtain small ZnO nanoparticles loaded on the HNT surface without the use of inorganic salts which envisage the removal of undesired anions and therefore a calcination process at high temperature. It was found that the presence of halloysite improved the UV–vis spectral absorption ability of ZnO. The hybrid was successful used as photocatalyst for the methylorange and rhodamine B degradation. In addition, after eight consecutive cycles for the methylorange photodegradation, the hybrid did not exhibit significant reduction in its photocatalytic performances confirming its stability. Based on trapping experiments and calculated energy bands we also proposed a photocatalytic mechanism. Furthermore, to evaluate the versatility of the synthetized HNT@ZnO hybrid, we used it as catalyst for biodiesel production from soybean oil, too. Also, in this case, the hybrid showed good catalytic performance and recyclability.
Graphical abstract Display Omitted
Highlights A heterogeneous catalyst based on halloysite and ZnO was prepared and characterized. The hybrid showed excellent photocatalytic activity towards dyes degradation. The hybrid showed good performances in biodiesel production from natural oils. The catalyst was successful recycled in both reactions.
One-pot synthesis of ZnO nanoparticles supported on halloysite nanotubes for catalytic applications
Massaro, Marina (author) / Casiello, Michele (author) / D'Accolti, Lucia (author) / Lazzara, Giuseppe (author) / Nacci, Angelo (author) / Nicotra, Giuseppe (author) / Noto, Renato (author) / Pettignano, Alberto (author) / Spinella, Corrado (author) / Riela, Serena (author)
Applied Clay Science ; 189
2020-02-19
Article (Journal)
Electronic Resource
English
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