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在超声辅助的条件下,通过共沉淀法制备了纳米镍/镁铝水滑石/活性炭复合材料(nano-Ni/Mg Al-LDHs/AC),并将其用于染料的催化降解。复合材料的制备分为2个步骤,首先在真空条件下,通过共沉淀法在活性炭载体上制备镁铝水滑石(Mg Al-LDHs);再通过抗坏血酸的还原作用将纳米镍沉积到Mg Al-LDHs/AC表面。采用场发射扫描电子显微镜(FE-SEM)、X射线能谱分析(EDS)、X-射线衍射仪(XRD)和傅里叶红外光谱(FT-IR)等测试方法表征了所制备样品。Mg Al-LDHs分布在活性炭表面,呈现花状平板结构,粒径大小为(80±30)nm,纳米镍修饰在Mg Al-LDHs/AC表面,平均粒径40 nm。所制备的复合材料对甲基橙、孔雀绿和亚甲基蓝的降解率均达到98%以上。
Under ultrasound-assisted condition, nano-Ni / MgAl-LDHs / AC composite was prepared by co-precipitation method and used for the catalytic degradation of dye. The preparation of composite material is divided into two steps. Firstly, MgAl-LDHs were prepared by coprecipitation method on activated carbon support under vacuum condition; and then nano-nickel was deposited on MgAl-LDHs by reductive action of ascorbic acid. LDHs / AC surface. The prepared samples were characterized by field emission scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) Mg Al-LDHs distributed on the surface of activated carbon, presenting a flower-like plate structure with a size of (80 ± 30) nm and a nano-nickel modified on the surface of Mg Al-LDHs / AC with an average particle size of 40 nm. The degradation rate of methyl orange, malachite green and methylene blue of the prepared composites reached more than 98%.