A two component three degree simplex lattice experimental design was employed to evaluate the impact of different mixing ratios of TiO2 and ZnO on an ordered mesoporous SBA-15 support for CO2 photoreduction. It was anticipated that their combined advantages: low cost, non-toxicity and combined electronic properties would facilitate CO2 photoreduction. The ratio of TiO2 used had a statistically significant positive impact on CO (b1 = 9.71, p-value = 2.9310–4) and CH4 (b1 = 1.43, p-value = 1.3510–3) cumulative production. A negative impact, from the interaction term between the ratios of TiO2 and ZnO, was found for CH4 cumulative production (b3 = -2.64, p-value = 2.3010–2). The systematic study provided evidence for the possible loss in CO2 photoreduction activity from sulphate groups. The decrease in activity is attributed to the presence of sulphate species in the ZnO prepared, which may possibly act as charge carrier and/or radical intermediate scavengers.

A two component three degree simplex lattice experimental design was employed to evaluate the impact of different mixing fractions of TiO2 and ZnO on an ordered mesoporous SBA-15 support for CO2 photoreduction. It was anticipated that the combined advantages of TiO2 and ZnO: low cost, non-toxicity and combined electronic properties would facilitate CO2 photoreduction. The fraction of ZnO had a statistically dominant impact on maximum CO2 adsorption (beta(2) = 22.65, p-value = 1.39 x 10(-4)). The fraction of TiO2 used had a statistically significant positive impact on CO (beta(1) = 9.71, p-value = 2.93 x 10(-4)) and CH4 (beta(1) = 1.43, p-value = 1.35 x 10(-3)) cumulative production. A negative impact, from the interaction term between the fractions of TiO2 and ZnO, was found for CH4 cumulative production (beta(3) = -2.64, p-value = 2.30 x 10(-2)). The systematic study provided evidence for the possible loss in CO2 photoreduction activity from sulphate groups introduced during the synthesis of ZnO. The decrease in activity is attributed to the presence of sulphate species in the ZnO prepared, which may possibly act as charge carrier and/or radical intermediate scavengers.

Systematic study of TiO2/ZnO mixed metal oxides for CO2 photoreduction

Zanardo, Danny
Methodology
;
Menegazzo, Federica
Investigation
;
Signoretto, Michela
Supervision
;
2019

Abstract

A two component three degree simplex lattice experimental design was employed to evaluate the impact of different mixing ratios of TiO2 and ZnO on an ordered mesoporous SBA-15 support for CO2 photoreduction. It was anticipated that their combined advantages: low cost, non-toxicity and combined electronic properties would facilitate CO2 photoreduction. The ratio of TiO2 used had a statistically significant positive impact on CO (b1 = 9.71, p-value = 2.9310–4) and CH4 (b1 = 1.43, p-value = 1.3510–3) cumulative production. A negative impact, from the interaction term between the ratios of TiO2 and ZnO, was found for CH4 cumulative production (b3 = -2.64, p-value = 2.3010–2). The systematic study provided evidence for the possible loss in CO2 photoreduction activity from sulphate groups. The decrease in activity is attributed to the presence of sulphate species in the ZnO prepared, which may possibly act as charge carrier and/or radical intermediate scavengers.
File in questo prodotto:
File Dimensione Formato  
RSC_advances_MO_paper_2_color_changes.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Accesso gratuito (solo visione)
Dimensione 6.44 MB
Formato Adobe PDF
6.44 MB Adobe PDF Visualizza/Apri

I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10278/3719005
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 14
social impact