Abstract In the present study, hydrothermal method (120 °C temperature, 24 h) for synthesis of ultra-layered sheet Cu-Co nanoparticles with various compositions (Cu/(Cu + Co) = 0.1, 0.3, 0.5, 0.7, 0.9) to degrade methyl orange (MO, C14H14N3SO3) organic dye via a catalytic sodium borohydride (NaBH4) reduction is carried out. The Box-Behnken design-response surface methodology (BBD-RSM) is employed for assessment and optimization of process conditions as catalyst composition (X1: 0.5, 0.7, 0.9 molar ratio), catalyst amount (X2: 0.0006, 0.0008, 0.0010 g) and reductant amount (X3: 0.003, 0.004, 0.005 g NaBH4). The interior and exterior features of all the nanoparticles are investigated by several physico-chemical techniques (HR-TEM/SAED, XPS, ICP-OES, XRD, N2 sorption, SEM, Zeta-sizer) that revealed oxide structure of mesoporous ultra-layered sheet nanoparticles. Meanwhile possible reduction products of MO are proposed based on LCMS-QTOF and UV–vis analysis results. The maximum reduction efficiency (97%) is achieved at the following conditions: MO (100 mg/L), in strong acidic (pH: 2.75) environment, Cu0.72Co0.28 catalyst (0.001 g), in presence of NaBH4 (0.0040 g) within Co nanoparticles can be applied in strong acidic wastewater in industrial applications.

中文翻译：

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超层状Cu Co纳米颗粒在有机染料催化还原中的优化应用

摘要 在本研究中，水热法（120 °C 温度，24 h）用于合成具有各种成分（Cu/(Cu + Co) = 0.1, 0.3, 0.5, 0.7, 0.9）的超层状片状 Cu-Co 纳米粒子通过催化硼氢化钠 (NaBH4) 还原降解甲基橙 (MO, C14H14N3SO3) 有机染料。Box-Behnken 设计-响应面方法 (BBD-RSM) 用于评估和优化工艺条件，如催化剂组成（X1：0.5、0.7、0.9 摩尔比）、催化剂量（X2：0.0006、0.0008、0.0010 g）和还原剂的量（X3：0.003、0.004、0.005 g NaBH4）。通过多种物理化学技术（HR-TEM/SAED、XPS、ICP-OES、XRD、N2 吸附、SEM、Zeta-sizer）揭示了介孔超层状片状纳米粒子的氧化物结构。同时根据LCMS-QTOF和UV-vis分析结果提出了MO可能的还原产物。最大还原效率 (97%) 在以下条件下实现：MO (100 mg/L)、强酸性 (pH: 2.75) 环境、Cu0.72Co0.28 催化剂 (0.001 g)、NaBH4 (0.0040 g) 内钴纳米颗粒可应用于工业应用中的强酸性废水。