Facile synthesis of magnetic hydroxyapatite-supported nickel oxide nanocomposite and its dye adsorption characteristics

被引:29
|
作者
Phasuk, Apakorn [1 ]
Srisantitham, Suppachai [1 ]
Tuntulani, Thawatchai [1 ]
Anutrasakda, Wipark [1 ]
机构
[1] Chulalongkorn Univ, Dept Chem, Fac Sci, Payathai Rd, Bangkok 10330, Thailand
来源
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2018年 / 24卷 / 02期
关键词
Nickel oxide; Hydroxyapatite; Magnetic materials; Nanocomposites; Dye adsorption; METHYLENE-BLUE ADSORPTION; CLINOPTILOLITE NANO-PARTICLES; AQUEOUS-SOLUTION; ACTIVATED CARBON; HIGHLY EFFICIENT; WASTE-WATER; CONGO RED; REMOVAL; NANOPARTICLES; KINETICS;
D O I
10.1007/s10450-017-9931-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel magnetic hydroxyapatite-supported nickel oxide nanocomposite (NiO-HAP@gamma-Fe2O3) was successfully prepared using a combination of co-precipitation and wet impregnation methods and was applied to the adsorption of methylene blue from aqueous solution. The presence of HAP, gamma-Fe2O3, NiO and all elements in NiO-HAP@gamma-Fe2O3 was confirmed by XRD, SEM-EDX and ICP-AES. The structure of the resulting nanocomposite was shown by TEM and SEM-EDX to be rod-shaped, measuring 55.8 +/- 16.5 nm in length and 27.1 +/- 6.2 nm in width, and on the surface of which was uniformly interspersed with NiO nanoparticles (about 21.4 nm average crystallite size) and gamma-Fe2O3 nanoparticles (6.7 +/- 2.6 nm in diameter). The novel NiO-HAP@gamma-Fe2O3 exhibited a high adsorption rate during the first 20 min and reached an equilibrium within 3 h. The adsorption capacity of NiO-HAP@gamma-Fe2O3 was significantly higher than that of its precursors (7.20 mg g(-1) vs 0.79-1.31 mg g(-1)). The superior adsorption performance of the novel nanocomposite, which occurred despite its relatively low surface area, is likely attributable to the synergistic mechanisms facilitated by the presence of mixed metal oxides (NiO and gamma-Fe2O3) on the adsorbent as well as by the Lewis acidity and basicity of the components of the adsorbent and the adsorbate. The adsorption kinetics and isotherms were well-fitted by the pseudo-second-order kinetic model and the Langmuir isotherm model, respectively.
引用
收藏
页码:157 / 167
页数:11
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