Photocatalytically active ZnO flaky nanoflowers for environmental remediation under solar light irradiation: effect of morphology on photocatalytic activity

Autor: K. Jayaprakash, G.A. Suganya Josephine, R. N. Viswanath, Arumugam Sivasamy, G Nirmala Devi, G Meenakshi
Rok vydání: 2021
Předmět:
Zdroj: Bulletin of Materials Science. 44
ISSN: 0973-7669
0250-4707
DOI: 10.1007/s12034-021-02531-1
Popis: ZnO-flaky-like nanoflowers with enhanced photocatalytic activity were synthesized by a new hydrothermal technique. The material was characterized and the photocatalytic studies were conducted under solar light irradiation for a model azo dye, Orange G. The material was compared with ZnO nanosphere and nanorod. The results showed the particle size of the nanostructures as a nanorod is 62–81 nm, as a nanosphere is 40–70 nm and as flaky nanoflowers is 20–30 nm (thickness of the flake). The photocatalytic activity showed an enhanced 2-fold increase in the activity for nanoflowers when compared to nanorods and spheres. The Brauner–Emmett–Teller results showed that the nanoflowers (14.197 m2 g−1) had a higher surface area nearly 3.5 times when compared to the nanospheres (4.06 m2 g−1) and seven times with nanorods (2.1 m2 g−1) which is the possibility of such high photocatalytic activity. The smaller particle size and the arrangement of nanoflowers play an important role in enhanced photocatalytic activity. ZnO flaky-nanoflowers as enhanced photocatalyst for the degradation of organics under solar light irradiation. It showed a two-fold increase in activity than ZnO nanospheres and nanorods.
Databáze: OpenAIRE
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