Effect of impurity in Cu 2 O nanowires on the degradation of methyl orange
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Effect of impurity in Cu2O nanowires on the degradation of methyl orange Zhipeng Xie1 · Yan Zhou1 · Linlin Guan1 · Sajjad Muhammad1 · Yuhan Jiang1 · Shuyu Zhang1 · Chunxin Yu1 · Yangjing Jiao1 · Shuangshuang Zhang1 · Yang Ren1 · Xiaowei Zhou1 · Zhu Liu1 Received: 4 October 2019 / Accepted: 14 January 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Effect of the impurity in Cu2O nanowire on the degradation of methyl orange under light irradiation in dark circumstances was investigated. Here, we present the fabrication of C u2O nanowires at different temperatures (110, 130, 150, 170, and 190 °C) by a facile hydrothermal route. Meanwhile, at the synthesis temperature of 110–150 °C, the major impurity in Cu2O nanowires was Cu4O3, and a new Cu impurity was introduced in the Cu2O nanowires as the synthesis temperature increased from 170 to 190 °C. Overall, as the synthesis temperature increases from 110 to 190 °C, the total impurity decreases in Cu2O nanowires. The fast degradation rate in dark circumstances has been achieved in Cu2O nanowires for all synthesis temperatures, which can be attributed to the Cu2+ in the Cu4O3 impurity of Cu2O nanowires. This result shows that the Cu2O nanowires obtained at the synthesis temperature of 150 °C have the fastest degradation rate for both under light irradiation and in dark circumstances. It has been found that under light irradiation, the Cu impurity in C u2O nanowires plays a vital role in the degradation of methyl orange. In the current scenario, different impurity contents influence the catalyst activity of Cu2O nanowires under the visible light or dark, respectively.
1 Introduction Semiconductor materials are widely used in the field of photocatalytic degradation due to their good electronic structure, light absorption properties, and charge transport properties [1, 2]. Among them, Cu2O is the most widely used in the field of photocatalytic degradation due to its narrow bandgap, broaden absorption of sunlight, non-toxicity, and environmental friendliness [3–12]. However, Cu2O is unstable due to photogenerated electrons can result in the self-decomposition of Cu2O [13]. To address this issue, a heterojunction or a Schottky junction with other semiconductors or metals
Zhipeng Xie and Yan Zhou have contributed equally. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10854-020-02914-w) contains supplementary material, which is available to authorized users. * Zhu Liu [email protected] 1
Department of Physics, School of Physics and Astronomy, Yunnan University, Kunming 650091, Yunnan, People’s Republic of China
[14, 15] had been introduced in C u2O for a facile electrons and holes separation. Recently, the preparation of cuprous oxide is mostly carried out by the hydrothermal method due to the adjustable morphology of C u 2O, cost-effective, and simple preparation parameters to handle [16, 17]. However, it is difficult to obtained completely pure Cu2O during the
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