One-step hydrothermal synthesis of hydrophilic Fe₃O₄/carbon composites and their application in removing toxic chemicals

Abstract

Hydrophilic Fe3O4/C nanocomposites have been prepared by a simple one-step hydrothermal reaction route, and demonstrated a high Cr(vi) removal capacity.

Amending the Structure of Renewable Carbon from Biorefinery Waste-Streams for Energy Storage Applications

“…Ferric chloride, primarily used as a catalyst during HTC synthesis, plays a critical role in carbonization and aromatization 29 – 31 . When hydrolyzed, ferric chloride forms ferric hydroxide or oxide and hydrochloric acid (HCl) in water 31 .…”

“…Ferric chloride, primarily used as a catalyst during HTC synthesis, plays a critical role in carbonization and aromatization 29 – 31 . When hydrolyzed, ferric chloride forms ferric hydroxide or oxide and hydrochloric acid (HCl) in water 31 . As such the resulting acid catalyzes dehydration of the sugar; reducing sugar intermediates in this system could partially reduce ferric ions to ferrous ions and then be subsequently oxidized into various iron oxide species.…”

“…As such the resulting acid catalyzes dehydration of the sugar; reducing sugar intermediates in this system could partially reduce ferric ions to ferrous ions and then be subsequently oxidized into various iron oxide species. Therefore, it is possible that some spheres may have traces of iron oxide at the micelle core 29 , 31 . However, most iron was likely removed during final acid wash of the resulting carbon except any iron oxide protected within carbon shells.…”

Earthicle and Its Discontents: A Historical Critical Review of Iron (Oxide) Particles Singly and Doubly Shelled with Silica and/or Carbon

“…In 2015, however, graphitic carbon-coated magnetite nanoparticles exhibited a superior photothermal therapeutic effect after the near-infrared irradiation of tumor xenografts that had the nanoparticles distributed in them . Around the same time, in 2015 and 2016, respectively, carbon-coated metallic iron was shown to effectively degrade chlorophenol to concentrations below the detection limit of high-performance liquid chromatography (HPLC) and remove chromium ions and rhodamine B from wastewaters, eliciting properties of interest for water purification treatments. Taking advantage of the fact that Fe 3+ ions are acid-leaching, while Si 4+ ions are base-leaching, the two ions were selectively isolated from a roasted drinking water treatment sludge, otherwise a pollutant for waterbodies, in a study from 2016 and used as precursors for the synthesis of silica-coated iron oxide particles, which would then go on and be tested for the adsorption and separation of other sorbates .…”

Large-scale preparation of size-controlled Fe3O4@SiO2 particles for electrophoretic display with non-iridescent structural colors

“…Several synthesis routes have been developed to solve this problem. [14][15][16] Co-precipitation and microemulsion methods can produce large numbers of Fe 3 O 4 particles; however, their particles sizes are usually less than 20 nanometers, which are not suitable for EPD. Guan et al synthesized Fe 3 O 4 particles via a facile solvothermal method by adding poly(vinyl pyrrolidone, PVP), which resulted in approximately spherical clusters with only one diameter of around 150 nm.…”