Characterization of the structural, optical, photocatalytic and and anti-inflammatory properties of Mn doped ZnGeO nanorods

• Published in: Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2019-07, Vol.7 (27), p.8216-8225
• Main Authors: Suzuki, V. Y, Amorin, L. H. C, Lima, N. M, Machado, E. G, Carvalho, P. E, Castro, S. B. R, Alves, C. C. Souza, Carli, A. P, Li, Maximo Siu, Longo, Elson, La Porta, Felipe A
• Format: Article
• ISSN: 2050-7526; 2050-7534
• DOI: 10.1039/c9tc01189g

The effect of Mn incorporation on the structural, optical, and photocatalytic properties of Zn 2 GeO 4 (ZGO) host matrices was investigated. Moreover, the ability to modulate in vitro inflammatory mediators and in vivo acute inflammation of Mn-doped ZGO (ZGO:Mn) was evaluated for the first time. We used a one-pot hydrothermal approach for preparing shape-controlled ZGO nanorods with 0, 1, 2, and 4% Mn 2+ (ZGO:Mn). Both the ZGO and ZGO:Mn nanorods showed a rhombohedral structure and excellent optical properties with photoluminescence (PL) emission in the visible region at 543 nm attributed to the electronic transitions ( 4 T 1 → 6 A 1 ) among the 3d 5 orbitals of the incorporated Mn 2+ ions in [MnO 4 ] clusters. The nanorods were found to be efficient photocatalysts for the ultraviolet degradation of methylene blue in the presence of H 2 O 2 . The ZGO:Mn nanorod catalyst with 2% Mn showed the best methylene blue degradation (complete degradation within 10 min). The surface acidity of the ZGO:Mn nanorods also contributed to their photocatalytic ability. Meanwhile, the ZGO:Mn nanorods significantly reduced the tumor necrosis factor and nitric oxide content. Hence, the 4%-doped nanorods were found to be highly effective in the reduction of carrageenan-induced paw edema. The acute inflammation (on macrophages) results revealed that the nanorods with 4% Mn 2+ exhibited promising anti-inflammatory properties. The effect of Mn incorporation on the structural, optical, and photocatalytic properties of Zn 2 GeO 4 (ZGO) host matrices was investigated.