Details

Autor(en) / Beteiligte

• Frazão, Ricardo Henrique Nascimento
• Della Rocca, Daniela Gier
• Amorim, Suelen Maria de
• Peralta, Rosely Aparecida
• Moura-Nickel, Camilla Daniela
• de Noni, Agenor
• Moreira, Regina de Fatima Peralta Muniz

Titel

Plastic optical fibres applied on the photocatalytic degradation of phenol with Ag2MoO4 and ß-Ag2MoO4/Ag3PO4 under visible light

Ist Teil von

• Environmental technology, 2021-04, Vol.42 (8), p.1271-1282

Ort / Verlag

Abingdon: Taylor & Francis

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Taylor & Francis Current Content Access

Beschreibungen/Notizen

• In this study, plastic optical fibre (POF) was considered as a light-transmitting medium and substrate for use in a photocatalytic environmental purification system, using Ag 2 MoO 4 and β-Ag 2 MoO 4 /Ag 3 PO 4 as photocatalysts. Pure Ag 2 MoO 4 and a β-Ag 2 MoO 4 /Ag 3 PO 4 composite were synthesized using a facile precipitation method. The composition, structures and optical properties of as-prepared catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), field-emission scanning electron microscopy (FESEM), UV/Vis diffuse reflectance spectroscopy (UV/Vis DRS), BET surface area and TGA/DTG. The catalysts were immobilized on POF and on the glass reactor surface and their efficiency in the phenol degradation was evaluated in a batch reactor under visible light. The use of POF offers advantages such as ease of handling and good adherence characteristics to support Ag 2 MoO 4. The photoactivity follows the order β-Ag 2 MoO 4 /Ag 3 PO 4 ≅ Ag 2 MoO 4  > TiO 2 P25, for photocatalysts immobilized on the glass reactor surface or in aqueous suspension. The immobilization of Ag 2 MoO 4 on POF revealed that thinner Ag 2 MoO 4 coatings achieved faster pollutant removal rates from solution, and the optimal catalyst deposition is 0.64 mg/cm 2 , causing maximum the light penetration and electron-hole generation close to the solid-liquid interface.