Heterogeneous photocatalytic degradation of pesticides using decatungstate intercalated macroporous layered double hydroxides

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Da Silva, ES (Autor) FEUP; Prevot, V (Autor) Outra; Forano, C (Autor) Outra; Wong Wah Chung, P (Autor) Outra; Burrows, HD (Autor) Outra; Sarakha, M (Autor) Outra

Revista

Título: Environmental Science and Pollution Research

Vol. 21

ISSN: 0944-1344

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-009-VR2

DOI: 10.1007/s11356-014-2971-z

Abstract (EN): Decatungstate W10O324- was efficiently intercalated between the layers of three-dimensionally ordered macroporous Mg2Al-layered double hydroxide. The structural and textural properties of as-prepared intercalated compound were characterized using different solid-state characterization techniques such as X-ray powder diffraction, FTIR and Raman spectroscopies and electronic microscopy. The photocatalytic properties of immobilized W10O324- within Mg2Al structure were investigated using 2-(1-naphthyl) acetamide (NAD) as a model of pesticide. The influence of different parameters such as amount of catalyst, pH and oxygen concentration were investigated. An optimal NAD degradation was obtained for a photocatalyst concentration of 60 mg l(-1). Under our experimental conditions, this heterogeneous photocatalyst induces photodegradation of 60 % of NAD after 17 h of irradiation at 365 nm and at pH 6.6. Interestingly, pesticide photodegradation leads to the mineralization of substrates to H2O and CO2 and the photocatalyst can be recycled and reused without any loss of activity over four cycles.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10