Synthesis of ZnO/CuO nanocomposite immobilized on γ-Al 2 O 3 and application for removal of methyl orange
Synthesis of ZnO/CuO nanocomposite immobilized on γ-Al 2 O 3 and application for removal of methyl orange
复制标题
DOI：
10.1016/j.apsusc.2016.04.165
复制
发表时间：
2016-10
影响因子：
6.7
通讯作者：
S. A. Hassanzadeh-Tabrizi;Mahboube Mohaghegh Motlagh;Saman Salahshour
中科院分区：
文献类型：
--
作者：
S. A. Hassanzadeh-Tabrizi;Mahboube Mohaghegh Motlagh;Saman Salahshour
采用非均相沉淀法制备了以γ-Al 2 O3为载体的ZnO/CuO纳米复合材料。将该复合材料作为吸附剂用于去除水溶液中的阴离子染料甲基橙子（MO）。用X射线衍射（XRD）、扫描电镜（SEM）和透射电镜（TEM）对合成的纳米复合材料进行了表征.扫描电镜结果表明，纳米复合材料形成了由纳米片层组成的层状结构。同时，还研究了热焓变（ΔH°）、熵变（ΔS°）和自由能变（ΔG°）等热力学参数。自由能变化表明吸附过程是自发的。吸附量随CuO含量的增加而增加，在400 °C焙烧时吸附量最大，为341 mg/g。研究表明，这种纳米复合材料可以被认为是一种有前途的吸附剂，净化水。
ZnO/CuO nanocomposite immobilized on γ-Al2O3was prepared by heterogeneous precipitation method. The composite was used as an adsorbent for the removal of anionic dye methyl orange (MO) from aqueous solution. The synthesized nanocomposites were studied by X- ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The SEM results showed that a layered structure was formed which was composed of nanostructured sheets. Thermodynamic parameters such as enthalpy change (ΔH°), entropy change (ΔS°) and free energy change (ΔG°) were also investigated. Free energy change showed that adsorption of methyl orange was spontaneous. The adsorption capacity increased with increasing CuO content, and the highest adsorption capacity of 341 mg/g was obtained at calcination temperature of 400 °C. The study showed that this nanocomposite can be considered a promising adsorbent to decontaminate water.