Fabrication of copper silicate microspheres using rice husk ash and its application for dearomatization of phenol derivatives.

ABSTRACT: In the present study, tubular copper silicate microspheres (CuSi-NTMs) were hydrothermally synthesized using high-silicon rice husk ash (RHA) as the raw material. Structural characterization reveals CuSi-NTMs have abundant mesopores, with a larger pore volume (0.367 cm³ g^-1) and specific surface area (375 m² g^-1) than the precursor RHA, facilitating active component dispersion. As expected, CuSi-NTMs exhibited superior catalytic performance in the dearomatization reaction between phenol derivatives and azodicarboxylates compared to other copper-based catalysts, achieving a 98% yield. The steric hindrance and electronic effects of phenolic substituents were also investigated. An ionic catalytic mechanism for CuSi-NTMs has been proposed. Cu(ii) coo

SUBMITTER: Li N 

PROVIDER: S-EPMC12700137 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature