Details

Autor(en) / Beteiligte

• Tashkandi, Nada Y.
• Albukhari, Soha M.
• Ismail, Adel A.

Titel

Mesoporous TiO2 enhanced by anchoring Mn3O4 for highly efficient photocatalyst toward photo-oxidation of ciprofloxacin

Ist Teil von

• Optical materials, 2022-05, Vol.127, p.112274, Article 112274

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• We describe the synthesis of mesoporous Mn3O4/TiO2 nanocomposites in the occurrence soft template. TEM images exhibited the Mn3O4/TiO2 nanocomposites homogeneous morphology with a particle size of ∼10–15 nm with close contact between TiO2 anatase and Mn3O4 crystals. The mesoporous Mn3O4/TiO2 nanocomposites were assessed toward degradation of ciprofloxacin (CIP) under visible illumination, which achieved 98.6% CIP degradation within 120 min. The degradation efficiency over porous 3% Mn3O4/TiO2 was greater 18 fold than that bare TiO2. The apparent degradation rate of the optimum 3% Mn3O4/TiO2 photocatalyst was fostered 22 folds higher than that of bare TiO2 NPs. Interestingly, the enhanced photocatalytic ability for Mn3O4/TiO2 heterojunction was significantly referred to the high absorption of visible light, synergistic effect and the unique structure with large surface area, which improved the CIP adsorption on porous Mn3O4/TiO2. Besides, the Mn3O4/TiO2 photocatalysts displayed stability and recyclability toward degradation of CIP for 10 h illumination. The photoelectrochemical and photoluminescence measurements of Mn3O4/TiO2 nanocomposites revealed an enhanced light-harvesting and effective electron-holes separation compared with bare TiO2. The prospective mechanism for degradation of CIP over Mn3O4/TiO2 heterojunction was presented. [Display omitted] •Mesoporous Mn3O4/TiO2 was synthesized by novel soft chemical procedure.•The visible Mn3O4/TiO2 photocatalyst was assessed for ciprofloxacin degradation.•The degradation efficiency over 3% Mn3O4/TiO2 was ∼98.6% for 120 min.•The degradation efficiency over 3% Mn3O4/TiO2 was greater 18 fold than TiO2.•Mn3O4/TiO2 exhibited excellent stability even after five consecutive cycles.