Multifunctional Magnetic Oxide Nanoparticle (MNP) Core-Shell: Review of Synthesis, Structural Studies and Application for Wastewater Treatment

Abstract

The demand for water is predicted to increase significantly over the coming decades; thus, there is a need to develop an inclusive wastewater decontaminator for the effective management and conservation of water. Magnetic oxide nanocomposites have great potentials as global and novel remediators for wastewater treatment, with robust environmental and economic gains. Environment-responsive nanocomposites would offer wide flexibility to harvest and utilize massive untapped natural energy sources to drive a green economy in tandem with the United Nations Sustainable Development Goals. Recent attempts to engineer smart magnetic oxide nanocomposites for wastewater treatment has been reported by several researchers. However, the magnetic properties of superparamagnetic nanocomposite materials and their adsorption properties nexus as fundamental to the design of recyclable nanomaterials are desirable for industrial application. The potentials of facile magnetic recovery, ease of functionalization, reusability, solar responsiveness, biocompatibility and ergonomic design promote the application of magnetic oxide nanocomposites in wastewater treatment. The review makes a holistic attempt to explore magnetic oxide nanocomposites for wastewater treatment; futuristic smart magnetic oxides as an elixir to global water scarcity is expounded. Desirable adsorption parameters and properties of magnetic oxides nanocomposites are explored while considering their fate in biological and environmental media.

Environmentally Friendly Green Synthesis of Fine Particles by Dry Mechanical Processes Toward SDGs: A Review

“…1 and Table 1, 9 goals which are expected to be achieved in the near future are selected as an example. Some powder processes and products considering the SDGs have been reviewed: e.g., food (Bartolucci et al, 2020), pharmaceutical (Assali and Zaid, 2022), agricultural material (Swoboda et al, 2022), catalyst (Nawaz et al, 2021), antibacterial material (Bhardwaj et al, 2021;Parmar et al, 2022), environmental improvement material (Nnadozie and Ajibade, 2020;Rehman et al, 2021). The use of fine particles in the processes shows many merits such as uniformity and reactivity; however, some serious demerits such as safety, labor environment and air pollution are latent.…”

An Overview on Composite Sorbents Based on Polyelectrolytes Used in Advanced Wastewater Treatment

“…Many scientists conducted pollutant sorption studies on different types of small inorganic (SiO 2 , TiO 2 , Fe 3 O 4 , clays, minerals, etc.) and organic (active carbon, GO, biochar) solid surfaces [126]. The pollutant immobilization on a certain surface strongly depends on the nature, concentration, distribution and accessibility of material functional groups.…”

“…The core-shell architecture could be achieved by direct deposition of different types of natural/synthetic polyelectrolytes (CS, PEI, humic acid, PAH, PVAm, PAA, PSS etc.) on 2D-cores, such as GO [21][22][23]25,115,116] and Ti 3 C 2 -MXenes [117], or 3D-cores, including Fe 3 O 4 [57,108,122,123,126,127], SiO 2 [24,28,83,90,100,101,103,109], SiO 2 /Fe 3 O 4 [88,128], PS [91], FeS [129], clays [99,111,112], CaCO 3 [102], mesoporous diatomite [89], natural fibers [107] and sand [123]. The direct deposition of the organic or organic/inorganic "shell" onto inorganic or organic "core" could be carried out in (i) one-step, by physisorption [21,89,108,111,112], grafting [23,83,88,100,115,117], ionic or solvent gelation/precipitation [25,27,…”

Editorial for “Materials Chemistry” Sections on Molecules

“…A selection of cutting-edge “Hot Papers” in the field of renewable materials, published in the Materials Chemistry Sector of Molecules , is reported in the Reference section of this Editorial [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”