Synthesis and photocatalytic activity of TiO2 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 TiO2 nanowires as the catalyst synthesized through a hydrothermal procedure. The as-synthesized TiO2 nanowires were fully characterized by SEM, TEM, XRD and Raman with a very high surface area of 512 m2 g-1. In addition, 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 TiO2 nanowires with a catalyst dosage of 1.0 g L-1 under acidic conditions with a 20 μM p-aminobenzoic acid solution obtaining 95% of degradation. Under similar experimental conditions comparative studies were performed obtaining 98% of degradation when P25 is employed. Finally, in both systems, a pseudo first order reaction was found to provide the best correlations, with constant rates of 2.0 x 10-2 min -1 and 2.4 x 10-2 min-1 for TiO2 nanowires and P25, respectively.
- Research Organization:
- Universidad del Turabo, Gurabo, PR (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0000672
- OSTI ID:
- 1335957
- Alternate ID(s):
- OSTI ID: 1359333
- Journal Information:
- Journal of Environmental Management, Vol. 167, Issue C; ISSN 0301-4797
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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