In:
RSC Sustainability, Royal Society of Chemistry (RSC), Vol. 1, No. 6 ( 2023), p. 1511-1521
Abstract:
Environmental pollution due to dye industries is a major concern as it affects both aquatic and human life. Among various processes, photocatalysis involving the advanced oxidation process (AOP) that employs semi-conductor based photocatalysis is popular and this process degrades dyes into CO 2 and H 2 O. The currently used TiO 2 based photocatalysis requires ultra-violet (UV) light irradiation for activation. There is always a need for a catalyst that works under natural sunlight so that the dye degradation process is economical. Towards this objective, we have developed Zn doped metal peroxides as efficient photocatalysts towards rhodamine B (RhB) dye degradation. A new family of zinc-doped barium peroxide (Ba 1- x Zn x O 2 x = 0, 0.2, 0.4, 0.6, and 0.8) and zinc-doped strontium peroxide (Sr 1− x Zn x O 2 x = 0, 0.2, 0.4, 0.6, and 0.8) photocatalysts were prepared by the co-precipitation technique for the photocatalytic degradation of RhB under UV and natural sunlight irradiation. In particular, Ba 0.4 Zn 0.6 O 2 ( x = 0.6) and Sr 0.6 Zn 0.4 O 2 ( x = 0.4) photocatalysts exhibit higher photodegradation efficiency than the pure peroxides both under UV and sunlight irradiation. Ba 0.4 Zn 0.6 O 2 and Sr 0.6 Zn 0.4 O 2 photocatalysts show a degradation efficiency of 99.9% and 99.8% within 15 min and 10 min under UV light, respectively. The rate constants of degradation by doped peroxides, in particular Ba 0.4 Zn 0.6 O 2 and Sr 0.6 Zn 0.4 O 2, are 100 times higher than those of the parent peroxides.
Type of Medium:
Online Resource
ISSN:
2753-8125
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
3161312-3
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