Abstract Two different stable forms of copper oxide (Cu2O and CuO) nanoparticles (NPs) were selectively synthesized through a smart approach using the same precursor but different reagent amounts. The fabrication strategy is cost-effective and relatively easy. The bandgap energies of the as-synthesized Cu2O- and CuO-NPs, as determined from Tauc plots, are 2.08 and 1.82 eV, respectively. The photocatalytic performance of these NPs was assessed through their use in the photodegradation of an organic-dye water contaminant under UV and solar-light illumination. Methylene blue (MB) was chosen as a representative dye because of its ubiquitous presence in industrial wastewater and its hazardous effects on human health. The results of experiments involving the photodegradation of MB by the synthesized Cu2O- and CuO-NPs revealed 97% and 81% photodecomposition efficiencies, respectively, during 60 min of UV-light illumination. When sunlight was used as a light source, and the duration was extended to 120 min, the photodecomposition efficiencies were 70% and 63% for the Cu2O- and CuO-NP photocatalysts, respectively. The efficient degradation of MB solution by the as-prepared NPs implies that they are potentially potent photocatalysts for the treatment of wastewater originating from industrial and domestic sources.

中文翻译：

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动力学控制选择性合成 Cu2O 和 CuO 纳米粒子以增强使用紫外线和太阳光降解亚甲基蓝

摘要 通过使用相同前体但试剂量不同的智能方法，选择性合成了两种不同稳定形式的氧化铜（Cu2O 和 CuO）纳米颗粒 (NPs)。制造策略具有成本效益且相对容易。从 Tauc 图中确定，合成的 Cu2O-和 CuO-NPs 的带隙能量分别为 2.08 和 1.82 eV。这些纳米颗粒的光催化性能是通过它们在紫外线和太阳光照射下用于有机染料水污染物的光降解来评估的。亚甲蓝 (MB) 被选为代表性染料，因为它普遍存在于工业废水中，并且对人类健康有害。合成的 Cu2O-和 CuO-NPs 光降解 MB 的实验结果表明，在 60 分钟的紫外光照射下，光分解效率分别为 97% 和 81%。当使用太阳光作为光源并将持续时间延长至 120 分钟时，Cu2O-和 CuO-NP 光催化剂的光分解效率分别为 70% 和 63%。所制备的 NPs 对 MB 溶液的有效降解意味着它们是处理工业和家庭废水的潜在有效光催化剂。分别。所制备的 NPs 对 MB 溶液的有效降解意味着它们是处理工业和家庭废水的潜在有效光催化剂。分别。所制备的 NPs 对 MB 溶液的有效降解意味着它们是处理工业和家庭废水的潜在有效光催化剂。