TY - JOUR
T1 - Solar photocatalytic application of NbO2OH as alternative photocatalyst for water treatment
AU - Batista, Luana Márcia Bezerra
AU - dos Santos, Alexsandro Jhones
AU - da Silva, Djalma Ribeiro
AU - Alves, Ana Paula de Melo
AU - Garcia-Segura, Sergi
AU - Martínez-Huitle, Carlos Alberto
N1 - Funding Information:
Financial support from National Council for Scientific and Technological Development (CNPq - 465571/2014-0; CNPq - 446846/2014-7 and CNPq - 401519/2014-7) and FAPESP (2014/50945-4) are gratefully acknowledged. A. J. dos Santos and L.M.B. Batista gratefully acknowledge the PhD grants awarded from CAPES. S. Garcia-Segura also acknowledge the post-doctoral grant of PNPD/CAPES.
Publisher Copyright:
© 2017
PY - 2017/10/15
Y1 - 2017/10/15
N2 - Water recycling and industrial effluents remediation are a hot topic of research to reduce the environmental impact of the human activity. Persistent organic pollutants are highly recalcitrant compounds with hazardous effects associated to their fate in water bodies. Several novel technologies have been developed during the last decades to deal with this novel contamination. However, the natural sources and idiosyncrasy of each country lead to the potential application of different technologies. In this context, we have focused on the development of phocotalytic treatment of solutions containing dyes using a novel photocatalytic material, the NbO2OH. The NbO2OH was synthesized and characterized with different techniques. Several assays demonstrated the solar photoactivity of this novel oxyhydroxide catalyst, achieving complete decolorizations after 10 min of treatment under optimal conditions of 1.0 g L− 1 NbO2OH photocatalyst loading, 0.1 M of H2O2 as electron scavenger, pH 4.0 and methyl orange concentrations up to 15 mg L− 1. Also, the catalyst recuperation demonstrated the potential reuse of this photocatalyst without losing catalytic response after five cycles. This work is of significant importance because niobium is a natural resource, mainly extracted in Brazil and the annual global sunlight irradiation in the near-equatorial region of northeast Brazil is over the average solar irradiation of the planet. Thus, the solar photocatalytic treatment using NbO2OH in northeast Brazil appears as a highly potential environmental-friendly nanotechnology to mitigate the water pollution.
AB - Water recycling and industrial effluents remediation are a hot topic of research to reduce the environmental impact of the human activity. Persistent organic pollutants are highly recalcitrant compounds with hazardous effects associated to their fate in water bodies. Several novel technologies have been developed during the last decades to deal with this novel contamination. However, the natural sources and idiosyncrasy of each country lead to the potential application of different technologies. In this context, we have focused on the development of phocotalytic treatment of solutions containing dyes using a novel photocatalytic material, the NbO2OH. The NbO2OH was synthesized and characterized with different techniques. Several assays demonstrated the solar photoactivity of this novel oxyhydroxide catalyst, achieving complete decolorizations after 10 min of treatment under optimal conditions of 1.0 g L− 1 NbO2OH photocatalyst loading, 0.1 M of H2O2 as electron scavenger, pH 4.0 and methyl orange concentrations up to 15 mg L− 1. Also, the catalyst recuperation demonstrated the potential reuse of this photocatalyst without losing catalytic response after five cycles. This work is of significant importance because niobium is a natural resource, mainly extracted in Brazil and the annual global sunlight irradiation in the near-equatorial region of northeast Brazil is over the average solar irradiation of the planet. Thus, the solar photocatalytic treatment using NbO2OH in northeast Brazil appears as a highly potential environmental-friendly nanotechnology to mitigate the water pollution.
KW - Advanced oxidation process
KW - Azo dye
KW - Methyl orange
KW - Nanotechnology
KW - Niobium
KW - Solar photocatalysis
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U2 - 10.1016/j.scitotenv.2017.04.019
DO - 10.1016/j.scitotenv.2017.04.019
M3 - Article
C2 - 28426988
AN - SCOPUS:85017568784
SN - 0048-9697
VL - 596-597
SP - 79
EP - 86
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -