Flower-like hierarchical h-MoO3: new findings of efficient visible light driven nano photocatalyst for methylene blue degradation
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- 12 February 2013
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Catalysis Science & Technology
- Vol. 3 (5), 1405-1414
- https://doi.org/10.1039/c3cy20764a
Abstract
Hexagonal molybdenum oxide (h-MoO3) nanocrystals with a flower-like hierarchical structure have been successfully synthesized by a solution based self assembly route. The as-synthesized h-MoO3 was recognized as a photocatalyst for the photocatalytic degradation of methylene blue (MB) under various experimental conditions. Initially, the as-synthesized h-MoO3 was characterized by different physico-chemical techniques in order to study and reveal the structural, functional, morphological, and optical properties. The results indicated that the photocatalyst has a hexagonal crystal structure with an average crystallite size of 46 nm. The morphology analysis has proved that the h-MoO3 comprises one dimensional (1D) rods with a hexagonal cross section. The possible formation mechanism is proposed as a self assembly process for nucleation and an Ostwald ripening mechanism for particle growth. The optical band gap investigation showed that the Eg value of h-MoO3 (2.94 eV) lies in the visible region and can be an appropriate candidate for visible light photocatalytic application. Furthermore, the experimental observations demonstrate an excellent photocatalytic performance of h-MoO3 in the degradation of MB under visible light irradiation.Keywords
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