Photodegradation of Phenol over a Hybrid Organo-Inorganic Material: Iron(II) Hydroxyphosphonoacetate

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• 作者：Montse Bazaga-Garcia ; Aurelio Cabeza ; Pascual Olivera-Pastor ; Isabel Santacruz ; Rosario M. P. Colodrero ; Miguel A. G. Aranda
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：July 12, 2012
• 年：2012
• 卷：116
• 期：27
• 页码：14526-14533
• 全文大小：437K
• 年卷期：v.116,no.27(July 12, 2012)
• ISSN：1932-7455

文摘

Water treatment is a hot topic, and it will become much more important in the decades ahead. Advanced oxidation processes are being increasingly used for organic contaminant removal, for example using photo-Fenton reactions. Here we report the use of an organo-inorganic hybrid, Fe[HO₃PCH(OH)COO]路2H₂O, as Fenton photocatalyst for phenol oxidation with H₂O₂ under UVA radiation. Preactivation, catalyst content, and particle size parameters have been studied/optimized for increasing phenol mineralization. Upon reaction, iron species are leached from the catalyst making a homogeneous catalysis contribution to the overall phenol photo-oxidation. Under optimized conditions, the mineralization degree was slightly larger than 90% after 80 min of irradiation. Analysis by X-ray photoelectron spectroscopy revealed important chemical modifications occurring on the surface of the catalyst after activation and phenol photodegradation. The sustained slow delivery of iron species upon phenol photoreaction is advantageous as the mixed heterogeneous鈥揾omogeneous catalytic processes result in very high phenol mineralization.