Abstract

The growth of Cu₂O crystal planes was be controlled by adding surfactant to the NaCl solution in this manuscript. The structure and composition of the synthesized Cu₂O particles were characterized by X‑ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and specific surface area test method (BET). The photocatalytic activities were evaluated by degrading methyl orange (MO) solution under magnetic stirring. The results shown that the synthesized Cu₂O particle was spherical self-assembly structure when the surfactant was CTAB, and behaved higher degradation performance. Under dark conditions, the adsorption efficiency of 100 mg L^–1 MO solution reached 67.08% in the first 1 min by 0.33 g L^–1 CTAB-Cu₂O, and after 15 min, the adsorption degradation efficiency of MO had reached 99.17%. The maximum adsorption capacity of CTAB-Cu₂O was 297.28 mg g^–1. The adsorption kinetics obeyed pseudo-second-order kinetics and followed the Freundlich isotherm.

中文翻译：

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电化学法合成高活性Cu2O用于光和非光条件下降解MO染料

摘要

Cu₂O 晶面的生长是通过在本手稿的 NaCl 溶液中添加表面活性剂来控制的。通过X射线衍射(XRD)、X射线光电子能谱(XPS)、场分析等手段对合成的Cu₂O颗粒的结构和组成进行了表征。发射扫描电子显微镜（FESEM）和比表面积测试方法（BET）。通过在磁力搅拌下降解甲基橙（MO）溶液来评估光催化活性。结果表明，当表面活性剂为CTAB时，合成的Cu₂O颗粒呈球形自组装结构，具有较高的降解性能。黑暗条件下，100 mg·L^–1 MO溶液在前1 min吸附效率达到67.08%，吸附量减少了0.33 g·L< a i=9>–1 CTAB-Cu₂O，15 min后MO的吸附降解效率已达到99.17%。 CTAB-Cu₂O的最大吸附量为297.28 mg·g^–1.吸附动力学服从准二级动力学，遵循Freundlich等温线。