Novel magnetic semiconductor Na2Fe2Ti6O16: synthesis, double absorption and strong adsorptive ability. Issue 33 (10th August 2017)

• Record Type: Journal Article
• Authors: Guo, Ze-Qing; Miao, Nan-Xi; Zhou, Jian-Ping; Lei, Yu-Xi; Hassan, Qadeer Ul; Zhou, Mei-Mei
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 33(2017)
• Page Start: 17589
• Page End: 17600
• Publication Date: 2017-08-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta03739b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Na2 Fe2 Ti6 O16 demonstrates a strong adsorptive ability towards methylene blue and easy separation from aqueous solution due to its high saturation magnetization. Abstract : A multifunctional material, Na2 Fe2 Ti6 O16 (NFTO), was synthesized via a simple hydrothermal method for the first time. NFTO nanosheets with a long hexagonal plate shape enjoy double absorption, high magnetic moment and strong adsorption. The magnetic property allows for the convenient collection of the NFTO adsorbent from aqueous solution during recycling and double absorption in the visible-light region could be applied in visible-light harvesting. The double absorption and magnetic property originate from the d–d transitions of Fe 3+, due to the effect of the crystal field. The adsorption process was evaluated by a methylene blue removal experiment and was found to have good agreement with the pseudo-second-order kinetics model and Langmuir isotherm. The NFTO nanosheets exhibit excellent recyclability, a high kinetic adsorption rate and a maximum adsorption capacity of 165.8 mg g −1 at equilibrium pH. These results are greatly significant for multifunctional NFTO as a promising adsorbent material used in water purification.