Novel onion-like carbon structures modified with iron oxide as photocatalysts for the degradation of persistent pollutants

Autor(es)

Renda, C. G. ^[1] ; Goulart, L. A. ^[2] ; Fernandes, C. H. M. ^[3] ; Mascaro, L. H. ^[3] ; de Aquino, J. M. ^[3] ; Bertholdo, R. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Mat Engn Dept, Washington Luiz Highway Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Chem, Trabalhador Sao Carlense Ave 400, BR-13566590 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Chem Dept, Washington Luiz Highway Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Fed Alfenas, Inst Sci & Technol, Jose A Vilela Highway 11999, BR 267, Km 533, BR-37715400 Pocos De Caldas, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 9, n. 1 FEB 2021.
• Citações Web of Science: 0

Resumo

A new photocatalyst based on onion-like carbon structures has been designed by heat-treating a modified phenolic resin (PR) modified with ferrocene (Fc). Its photocatalytic activity was investigated by degrading the methylene blue (MB) dye in the presence of UV-vis light. The catalyst was characterized by X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Diffuse Reflectance Spectroscopy (DRS) moreover, the Brunauer-Emmett-Teller (BET) method was used to calculate the surface area. The carbon-iron catalyst (PR-Fc) presents high surface area and its structure is composed of amorphous carbon, graphite, gamma-iron, Fe3C (cementite), alpha-Fe2O3 (hematite), and gamma-Fe2O3 (maghemite). The results indicate 100% of dye degradation and removal of 97% of the organic load after just 60 min of reaction. The catalytic efficiency of PR-Fc for degradation was maintained in reuse experiments, with a decrease of only 23% after the third cycle. The PR-Fc photocatalyst is reusable and quite stable, thus it has enormous potential for treating organic pollutants. (AU)

• Processo FAPESP: 18/16401-8 - Fotocatalisadores e fotoeletrodos para obtenção de combustíveis renováveis
• Beneficiário: Lucia Helena Mascaro Sales
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/11986-5 - Geração e Armazenamento de Novas Energias: trazendo desenvolvimento tecnológico para o país
• Beneficiário: Ana Flávia Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock
• Beneficiário: Arlene Gonçalves Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs