Adsorption Mechanisms and Electrochemical Properties of Methyl Blue onto Magnetic Ni x Mg y Zn (1-x-y) Fe 2 O 4 Nanopart
- PDF / 1,934,237 Bytes
- 12 Pages / 547.087 x 737.008 pts Page_size
- 0 Downloads / 165 Views
Adsorption Mechanisms and Electrochemical Properties of Methyl Blue onto Magnetic NixMgyZn(1-x-y)Fe2O4 Nanoparticles Fabricated Via the Ethanol-Assisted Combustion Process Lulu Yu & You Li & Shuai Pan & Wei Huang & Ruijiang Liu Received: 25 March 2020 / Accepted: 31 May 2020 # Springer Nature Switzerland AG 2020
Abstract Magnetic NixMgyZn(1-x-y)Fe2O4 nanoparticles were fabricated via the ethanol-assisted combustion process. The characterizations of the nanoparticles were illuminated by SEM, EDS, XRD, and VSM. The specific surface area and pore diameter distribution were measured by the Brunauer–Emmett–Teller (BET) measurement. Magnetic Ni0.4Mg0.3Zn0.3Fe2O4 nanoparticles calcined at 400 °C for 2 h with anhydrous ethanol of 20 mL were chosen to remove methyl blue (MB), and their adsorption performances for removal of MB from water environment were evaluated. Adsorption kinetics and adsorption isotherm experiments had been carried out; the adsorption mechanisms were well demonstrated by the pseudo-second-order kinetics model and Temkin isotherm model, respectively, which indicated that the removal of MB by Ni0.4Mg0.3Zn0.3Fe2O4 adsorbent was multimolecular layer chemisorption mechanism. The pH effect of the dye solutions was explored to reveal that the adsorption capacity remained a solidly high
Highlights • NixMgyZn(1-x-y)Fe2O4 nanoparticles were fabricated by the ethanol-assisted combustion method. • The pseudo-second-order kinetics model could expound the adsorption process of MB onto them. • The adsorption isotherm of MB onto them could be well fitted by Temkin model. • The adsorption characteristics were further illuminated by CV and EIS. L. Yu : Y. Li : S. Pan : W. Huang : R. Liu (*) School of Pharmacy, Jiangsu University, Zhenjiang 212013, People’s Republic of China e-mail: [email protected]
level when pH was above 5. After three times of recycling, the relative removal activity of MB onto the nanoparticles remained above 97.6% of its original removal activity. The adsorption process of MB removed by Ni0.4Mg0.3Zn0.3Fe2O4 adsorbent was further illuminated by cyclic voltammetry (CV) and electrochemical impedance spectra (EIS).
Keywords Ni-Mg-Zn ferrites . Ethanol-assisted combustion . Methyl blue . Electrochemical property . Adsorption mechanism
1 Introduction Organic dyes are widely applied in various fields, such as textile, paint, and pigment, and many of them are found to be toxic, teratogenic, and carcinogenic pollutants (Zhou et al. 2020; Patil et al. 2020), so they have potential negative effects on the water environment, causing serious environmental pollution problems (Yang et al. 2018). At the same time, many dyes are stable and recalcitrant molecules. It is difficult to degrade dye due to the complexity of their components (Zhang et al. 2020; Wang et al. 2017). Owing to the adverse effects of contaminants, the aquatic environment is no longer safe enough, and the wastewater is even difficult to completely purify into clean water (Isosaari et al. 2019). Hence, it is urgent to eliminate dyes’
Data Loading...
