Fabrication of hierarchical CuO architectures displaying the (111) facets‐enhanced superior fenton‐like degradation of organic dyes

Autor: Kangze Ding, Hanmei Hu, Xinqing Ge, Mei Sun, Chonghai Deng, Zanzan Jiang, Hong Yu, Yaping Liao
Rok vydání: 2021
Předmět:
Zdroj: Journal of Materials Science: Materials in Electronics. 32:11989-12000
ISSN: 1573-482X
0957-4522
DOI: 10.1007/s10854-021-05829-2
Popis: Three types of hierarchical CuO architectures with the varying (111) facets exposure were controllably fabricated by a microwave-assisted wet chemical route. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy, transmission electron microscopy (TEM), and high-resolution TEM. The results demonstrate that the monoclinic hierarchical pumpkin-like CuO (p-CuO) crystals are self-assembled by 1D nanoribbons primarily exposed (111) lattice planes with diameters of 6–7 nm. Specifically, the XRD peak intensity ratios of I111/I− 111 were calculated to be 1.38 for p-CuO, which is much larger than that of the other shuttle-like CuO (s-CuO) (1.01) and CuO microspheres (m-CuO) (0.92). The possible growth mechanism for the three kinds of CuO microstructures was proposed. Interestingly, it is a finding for the first time that the Fenton-like catalytic activities of the as-prepared CuO catalysts are closely relied on their preferential (111) facets exposure, in which the order of degradation rates of RhB, MB, and MO accords with the following: p-CuO > s-CuO > m-CuO. Significantly, the decoloring efficiency of RhB over p-CuO in the assistant of H2O2 was up to 93.7% within the initial 1 min, and the total removal rate reached 98.5% after 5 min, exhibiting the rapid and superior Fenton-like catalysis activity.
Databáze: OpenAIRE
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