钴和镍离子取代的介孔ZnMAlO的合成及其在罗丹明B光降解中的应用
Synthesis of Mesoporous ZnMAlO Substituted by Co and Ni Ions and Application in the Photodegradation of Rhodamine B.
作者信息
Nascimento Nilson Machado Pontes do, Lima Bárbara Ronara Machado de, Zamian José Roberto, Costa Carlos Emmerson Ferreira da, Nascimento Luís Adriano Santos do, Luque Rafael, Filho Geraldo Narciso da Rocha
机构信息
Graduation Program in Chemistry, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém-PA 66075-110, Brazil.
Laboratory of Catalysis and Oilchemistry, Federal University of Pará, Street Augusto Correia, Guamá, Belém-PA 66075-110, Brazil.
出版信息
Materials (Basel). 2020 May 6;13(9):2150. doi: 10.3390/ma13092150.
A new mesoporous ZnMAlO photocatalyst was prepared using the metal-chitosan complexation method with different degrees of Zn cation substitution with cobalt and nickel ions (M = Co and Ni). Characterization using X-ray diffraction (XRD), Infrared absorption spectrometry (FTIR), energy dispersion spectroscopy (EDS), diffuse reflectance spectrometry (DRS), scanning electron miscoscopy (SEM), transmission electron miscroscopy (TEM), N adsorption- desorption isotherms using the Barrett-Joyner-Halenda (BJH) method, thermogravimetric analysis (TG) and differential thermal analysis (DTA) confirmed the formation of the spinel phase and high purity for all samples. N adsorption/desorption and size pore distribution confirmed the high surface area. The photocatalytic activity of ZnMAlO and the effect of replacing Zn ions with Ni and Co on the degradation of rhodamine B under ultraviolet light were studied in detail. The sample containing 0.1 mol of cobalt had the highest removal rate reaching 83%, favored by surface area and material bandgap (109 m g and 2.19 eV, respectively).
采用金属-壳聚糖络合法，用钴离子和镍离子（M = Co和Ni）以不同程度取代锌阳离子，制备了一种新型介孔ZnMAlO光催化剂。通过X射线衍射（XRD）、红外吸收光谱（FTIR）、能量色散光谱（EDS）、漫反射光谱（DRS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、采用巴雷特-乔伊纳-哈伦达（BJH）方法的N吸附-脱附等温线、热重分析（TG）和差示热分析（DTA）对样品进行表征，证实了所有样品均形成了尖晶石相且纯度较高。N吸附/脱附及孔径分布证实了其具有高比表面积。详细研究了ZnMAlO的光催化活性以及用Ni和Co取代Zn离子对罗丹明B在紫外光下降解的影响。含0.1 mol钴的样品去除率最高，达到83%，这得益于其比表面积和材料带隙（分别为109 m²/g和2.19 eV）。
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