Synthesis and properties of carbon–metal oxide nanomaterials

Авторы: Навроцкая А.Г., Кривошапкина Е.Ф., Перовский И.А., Бауман Ю.И., Мишаков И.В., Ведягин А.А., Исаенко С.И., Кривошапкин П.В.

Abstract

In this paper, the sorption of the heavy metal ions (Sr²⁺, Ba²⁺, and Cs⁺) on the hybrid CNF/TiO₂ and CNF/Fe₂O₃ materials is considered. The colloid–chemical properties of the TiO₂ and Fe₂O₃ nanoparticles and carbon nanofibers in the dispersions were studied, and interaction between nanoparticles and nanofibers in accordance with the hetero-coagulation principle was estimated. The carbon nanofibers used were prepared by catalytic chemical vapor deposition of a propane–butane mixture over the nickel–copper catalyst and then functionalized by boiling in a mixture of concentrated hydrochloric and nitric acids. The TiO₂ and Fe₂O₃ nanoparticles were synthesized via a sol–gel technique. The sol was mixed with carbon nanofibers. After drying, the hybrid materials with a uniform distribution of the oxide NPs along the nanofiber’s surface were obtained. The CNF-to-metal oxide ratios were 10:1 and 1:1. The samples were characterized by a set of physicochemical methods. The hybrid CNF/TiO₂ system was found to have a synergetic effect toward the sorption of the metal ions from their aqueous solutions.

DOI: 10.1007/s10971-019-04974-9

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