ZnO Polymeric Composite Films for n-Decane Removal from Air Streams in a Continuous Flow NETmix Photoreactor under UVA Light

Autor(es)

Zanrosso, Crissie D. ^[1] ; Miranda, Sandra M. ^[2] ; M. da Costa Filho, Batuira ^[2] ; Espindola, Jonathan C. ^{[2, 3]} ; Piazza, Diego ^[4] ; J. P. Vilar, Vitor ^[2] ; A. Lansarin, Marla ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio Grande do Sul, Chem Engn Dept, R Ramiro Barcelos 2777, BR-90035007 Porto Alegre, RS - Brazil

^[2] Univ Porto, Fac Engn, Lab Catalysis & Mat LSRE LCM, Lab Separat & React Engn, Dept Chem Engn, Rua Dr Roberto Frias, P-4200465 Porto - Portugal

^[3] Univ Estadual Campinas, Sch Civil Engn Architecture & Urban Design, BR-13083852 Campinas - Brazil

^[4] Univ Caxias do Sul, Ctr Exact Sci & Technol, Lab Polymers, R Francisco Getulio Vargas 1130, BR-95070560 Caxias Do Sul, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NANOMATERIALS; v. 11, n. 8 AUG 2021.
• Citações Web of Science: 0

Resumo

Polymeric composite films have been explored for many photocatalytic applications, from water treatment to self-cleaning devices. Their properties, namely, thickness and porosity, are controlled mainly by the preparation conditions. However, little has been discussed on the effect of thickness and porosity of polymeric composite films for photocatalytic processes, especially in gas phase. In the present study, different preparation treatments of ZnO-based polymeric composite films and their effects on its performance and stability were investigated. The polymeric composites were prepared by solution mixing followed by non-solvent induced phase separation (NIPS), using poly(vinylidene fluoride) (PVDF) as the matrix and ZnO-based photocatalysts. Different wet thickness, photocatalyst mass, and treatments (e.g., using or not pore-forming agent and compatibilizer) were assessed. A low ZnO/PVDF ratio and higher wet thickness, together with the use of pore-forming agent and compatibilizer, proved to be a good strategy for increasing photocatalytic efficiency given the low agglomerate formation and high polymer transmittance. Nonetheless, the composites exhibited deactivation after several minutes of exposure. Characterization by XRD, FTIR-ATR, and SEM were carried out to further investigate the polymeric film treatments and stability. ZnO film was most likely deactivated due to zinc carbonate formation intensified by the polymer presence. (AU)

• Processo FAPESP: 21/01416-2 - Conjugação de processos avançados de tratamento para produção de água de reuso: ensaios de bancada e em estação piloto
• Beneficiário: Jonathan Cawettiere Almeida Espíndola
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado