One-pot synthesis of ZnO nanoparticles supported on halloysite nanotubes for catalytic applications

Serena Riela, Giuseppe Lazzara, Alberto Pettignano, Marina Massaro, Renato Noto, Angelo Nacci, Michele Casiello, Lucia D'Accolti, Giuseppe Nicotra, Corrado Spinella

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalApplied Clay Science
Volume189
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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