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Effect of Ag2S shell thickness on the photocatalytic properties of ZnO/Ag2S core–shell nanorod arrays
- Li, Xiuyan, Liu, Dongxu, Shi, Zhu, Yang, Jinghai
- Journal of materials science 2019 v.54 no.2 pp. 1226-1235
- absorption, adsorption, aqueous solutions, irradiation, lighting, nanorods, photocatalysis, rhodamines, zinc oxide
- ZnO/Ag₂S core–shell nanorod arrays (NRAs) are successfully fabricated via chemical bath deposition procedure and subsequent successive ionic layer adsorption and reaction (SILAR) technique. The average diameter of ZnO core is about 100 nm, and the thicknesses of Ag₂S shell are adjusted from 6 to 35 nm by varying the time of SILAR. ZnO/Ag₂S NRAs show an enhancement of absorption in the visible region, and the absorption intensity in the visible region enhances with the increase in Ag₂S shell thickness. Compared with pure ZnO NRAs, ZnO/Ag₂S NRAs exhibit outstanding photocatalytic activity for degradation of rhodamine B (RhB) aqueous solution under simulated sunlight irradiation. In addition, ZnO/Ag₂S NRAs with Ag₂S shell thickness of 6 nm display the highest photocatalytic activity, which is 6.0 times higher than that of pure ZnO NRAs.