Abstract
Heterogeneous photocatalysis is highlighted to treat volatile organic compound (VOC) emission. Then, this work analysed the influence of palladium (Pd) content loaded in TiO2 on n-octane and iso-octane photodegradation. For this, TiO2 was loaded with Pd in different contents: 0.4%, 0.7%, and 1.0%. The samples were characterized, and the photodegradation experiments were conducted by Pd/TiO2/UV process. The characterization analyses showed that the metal presence did not change the catalyst structure or its surface area; however, it reduced the bandgap energy. The photocatalytic results proved that palladium improved n-octane degradation from 62% (pure TiO2) to 92.6% (0.4%Pd/TiO2) and, iso-octane degradation enhanced from 59% (pure TiO2) to 90.6% (0.7%Pd/TiO2); all results were obtained in the space time of 39 s. Therefore, 0.4%Pd/TiO2 and 0.7%Pd/TiO2 showed better oxidation results to degradation n-octane and iso-octane, respectively. The kinetic model of pseudo-first order showed a good fit for the data of both VOCs. Heterogeneous photocatalysis with Pd/TiO2 showed to be an adequate technique to reduce VOCs emission.
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Funding
This work was financed by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES) (Finance Code 001) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (Finance Code 153206/2013–6).
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Arnaldo Efigênio Castro da Silveira: review of literature, sampling and data collection, analysis, writing.
Bárbara Maria Borges Ribeiro: review of literature, analysis, MS drafting, MS editing.
Bianca Gvozdenovic Medina Bricio: review of literature, analysis, MS drafting.
Tânia Miyoko Fujimoto: review of literature, analysis.
Ursula Luana Rochetto Doubek: review of literature, analysis.
Edson Tomaz: overall guidance and support.
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da Silveira, A.E.C., Ribeiro, B.M.B., Bricio, B.G.M. et al. Influence of palladium content dispersed in the TiO2 photocatalyst for degradation of volatile organic compounds in gas emission. Environ Sci Pollut Res 29, 42242–42250 (2022). https://doi.org/10.1007/s11356-021-17075-4
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DOI: https://doi.org/10.1007/s11356-021-17075-4