Enhancing the Photo and Biomedical Activity of ZnO by Incorporation with Zinc Silicate Nanocomposites. (30th June 2020)

• Record Type: Journal Article
• Authors: El‐Shafey, H.M.; Saif, M.; Aly, M.H.; Hafez, H.S.
• Is Part Of: Applied organometallic chemistry. Volume 34:Number 11(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-06-30
• Subjects: bioactivity -- Nano composite -- Photocatalysis -- zinc silicate/ZnO; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.5902
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract : Highly active and non‐toxic ZnO incorporated with zinc silicate (zinc silicate/ZnO) nanocomposites are synthesized via a simple and low‐cost hydrothermal method followed by heat treatment. Different molar ratios from Si to Zn [1:20], [1:10], [1:8] and [1:6] are used to prepare different zinc silicate/ZnO nano composite materials which are assigned to ZS1, ZS2, ZS3 and ZS4 samples, respectively. The effect of calcination times and temperatures have been investigated on the crystallographic and morphological properties of the synthesized nano composite materials. The XRD analysis show that at very low molar ratios, zincite (ZnO) is the most predominant phase. However, at higher molar ratios, there are two phases coexist; hemimorphite (Zn4 Si4 O7 ) and zincite. The TEM images show a uniform nanoplate‐like shaped morphology from ZnO with well dispersed Zn2 SiO4 nanoparticles. The SBET is remarkably increased from 18.14 to 176.5 m 2 .g −1 by calcination up to 400 °C and then decreased to 72.2 m 2 . g −1 by further increasing in the calcinations temp up to 1, 000 °C. The bio and photocatalytic activities of the composite nanomaterials have been investigated. Compared with the pure ZnO, the nano composites have been demonstrated as better photocatalysts for the degradation of Levafex golden yellow (LGY) dye as a model of organic dye pollutant under simulated sunlight irradiation. Moreover, the nano composites were evidenced to possess better and non‐toxic antitumor activity towards hepatocellular carcinoma cell lines with (IC50 = 11.2 μg.ml −1 and LD50 ˃ 50 mg. Kg −1 ). Abstract : Simple, low cost and novel hydrothermal method have been used for synthesis of Zinc silicate/ZnO nano composite materials. Zinc silicate/ZnO nano composite materials are promising photoactive catalysts than pure ZnO. A better and non‐toxic antitumor activity of the Zinc silicate/ZnO nano composites.