Abstract

In this manuscript, the preparation and the comparison of the photocatalytic activity of novel TiO2@copper porphyrin composites obtained by impregnation of (5-(4-hydroxy) phenyl-10,15,20-triphenyl copper porphyrin 1a, 5-(4-ethylacetatatomethoxy) phenyl-10,15,20-triphenylcopper porphyrin 1b, and 5-(4-carboxylatomethoxy) phenyl-10,15,20-triphenyl copper porphyrin 1c respectively onto the surface of different TiO2 samples, commercial (cTiO2) and home-prepared (pTiO2), has been reported. The TiO2@copper porphyrin composites were characterized by XRD, BET, UV–vis, FT-IR and SEM-EDS techniques. For the first time, the formation of aggregated porphyrin, most likely in form of dimers 1a-1a, 1b-1b and 1c-1c, were detected on the lower and less hydroxylated surface area of cTiO2. The photocatalytic activity of the samples was evaluated on the basis of the photodegradation of 4-nitrophenol (4-NP) in aqueous solution under metal halide lamp irradiation. The highest photocatalytic efficiency in the degradation of 4-NP, observed by using the carboxylporphyrin 1c as sensitizer supported onto the surface of both pTiO2 or cTiO2, was ascribed to the optimal combination of the anchoring mode with the efficient electron injection in the conduction band that carboxylic group produced at the surface of the TiO2 samples.

Autore Pugliese

• Mele Giuseppe Agostino

Tutti gli autori

• Lü, Xiang-fei , Qian, Hui , Mele, Giuseppe , De Riccardis, Alberto , Zhao, Ran , Chen, Jie , Wu, Hao , Hu, Nan-jiang

Titolo volume/Rivista

CATALYSIS TODAY

Anno di pubblicazione

2017

ISSN

0920-5861

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

2

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile