title: Hexagonal mesoporous silica modified with copper phthalocyanine as a photocatalyst for pesticide 2,4-dichlorophenoxiacetic acid degradation.
abstract: A new mesoporous catalyst was prepared by the reaction between 3-aminopropyltrimethoxisylane and Cu(II)-hexadecafluorophthalocyanine, followed by co-condensation of tetraethylorthosilicate around a micelle formed by n-dodecylamine. The surfactant was removed from the pores by continuous extraction with ethanol, giving the Si-CuF16Pc catalyst. This catalyst was characterized by SEM, FTIR, TGA, 29Si NMR, N2 adsorption and X-ray diffraction. SEM images confirmed that the catalyst material is formed by nanoaggregates with a diameter of 100 nm. N2 adsorption isotherms showed that Si-CuF16Pc has a surface area of approximately 200 m2 g(-1) and a porous diameter of 7.7 nm, characterizing the mesoporosity of this product. This novel material shows an excellent photocatalytic activity, degrading almost 90% of 2,4-dichlorophenoxyacetic acid (2,4-D) up to 30 min, while only approximately 40% of photodegradation was obtained in its absence.
authors.affiliation: Laboratórios de Terras Raras e Bioinorgânica, Departamento de Química, FFCLRP-USP, Av. Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil.
authors.forename: Edimar
authors.initials: E
authors.lastname: DeOliveira
authors.forename: Cláudio R
authors.initials: CR
authors.lastname: Neri
authors.forename: Anderson O
authors.initials: AO
authors.lastname: Ribeiro
authors.forename: Vinícius S
authors.initials: VS
authors.lastname: Garcia
authors.forename: Leonardo L
authors.initials: LL
authors.lastname: Costa
authors.forename: Aline O
authors.initials: AO
authors.lastname: Moura
authors.forename: Alexandre G S
authors.initials: AG
authors.lastname: Prado
authors.forename: Osvaldo A
authors.initials: OA
authors.lastname: Serra
authors.forename: Yassuko
authors.initials: Y
authors.lastname: Iamamoto
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000737:chemistry*; D000327:Adsorption; D000588:Amines / Q000737:chemistry; D001671:Biochemistry / Q000379:methods; D002384:Catalysis; D007211:Indoles / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000737:chemistry*; D010575:Pesticides / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry*; D013501:Surface-Active Agents; D014961:X-Ray Diffraction
chemical_list: D000588:Amines; D007211:Indoles; D009942:Organometallic Compounds; D010575:Pesticides; D013501:Surface-Active Agents; D015084:2,4-Dichlorophenoxyacetic Acid; C015445:copper phthalocyanine; D012822:Silicon Dioxide; C003935:dodecylamine