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Synthesis and photocatalytic activity of TiO.sub.2 nanowires in the degradation of p-aminobenzoic acid: A comparative study with a commercial catalyst
The photocatalytic degradation of p-aminobenzoic acid was studied using TiO.sub.2 nanowires as the catalyst synthesized through a hydrothermal procedure. The as-synthesized TiO.sub.2 nanowires were fully characterized by SEM, TEM, XRD and Raman with a very high surface area of 512 m.sup.2 g.sup.-1. The photocatalytic degradation of p-aminobenzoic acid was carried out under 180 min of constant radiation and the results were compared with P25 as commercial catalyst. Optimal experimental conditions were determined for TiO.sub.2 nanowires with a catalyst dosage of 1.0 g L.sup.-1 under acidic conditions with a 20 [mu]M p-aminobenzoic acid solution obtaining 95% of degradation. Under similar experimental conditions comparative studies were performed obtaining 98% of degradation when P25 is employed. In both systems, a pseudo first order reaction was found to provide the best correlations, with constant rates of 2.0 x 10.sup.-2 min.sup.-1 and 2.4 x 10.sup.-2 min.sup.-1 for TiO.sub.2 nanowires and P25, respectively.
Synthesis and photocatalytic activity of TiO.sub.2 nanowires in the degradation of p-aminobenzoic acid: A comparative study with a commercial catalyst
The photocatalytic degradation of p-aminobenzoic acid was studied using TiO.sub.2 nanowires as the catalyst synthesized through a hydrothermal procedure. The as-synthesized TiO.sub.2 nanowires were fully characterized by SEM, TEM, XRD and Raman with a very high surface area of 512 m.sup.2 g.sup.-1. The photocatalytic degradation of p-aminobenzoic acid was carried out under 180 min of constant radiation and the results were compared with P25 as commercial catalyst. Optimal experimental conditions were determined for TiO.sub.2 nanowires with a catalyst dosage of 1.0 g L.sup.-1 under acidic conditions with a 20 [mu]M p-aminobenzoic acid solution obtaining 95% of degradation. Under similar experimental conditions comparative studies were performed obtaining 98% of degradation when P25 is employed. In both systems, a pseudo first order reaction was found to provide the best correlations, with constant rates of 2.0 x 10.sup.-2 min.sup.-1 and 2.4 x 10.sup.-2 min.sup.-1 for TiO.sub.2 nanowires and P25, respectively.
Synthesis and photocatalytic activity of TiO.sub.2 nanowires in the degradation of p-aminobenzoic acid: A comparative study with a commercial catalyst
Cotto, MariA (author) / Marquez, Francisco / Soto-Vazquez, Loraine / Morant, Carmen / Duconge, Jose
2016
Article (Journal)
English
BKL:
43.00
Photocatalytic ozonation of aniline with TiO.sub.2-carbon composite materials
| Online Contents | 2017