Size and shape controlled of α-Fe2O3 nanoparticles prepared via sol–gel technique and their photocatalytic activity

Green synthesis of iron-based nanoparticles using Chlorophytum comosum leaf extract: methyl orange dye degradation and antimicrobial properties

“…So far, a wide variety of NPs including Au [6], CdS [7], TiO 2 [8,9], Manganese-doped ZnO [10], zinc ferrite [11], and iron nanoparticles (INPs) have been successfully used for dye degradation purposes [12]. INPs have been intensively probed for the degradation and removal of organic wastes owing to their versatile properties, high catalytic activities, and highly reactive surface functional groups [13]. Environmental remediation [14], separations and analyses of various analysts [15,16], fungal, parasitic, and bacterial diseases therapies [17,18], drug delivery [19], biosensing [20], imaging [21], catalysis [22], and magnetic storage media [23] can be mentioned as some of the potential applications of NPs.…”

“…Among the organic pollutants, azo dyes are of particular concern, as the extensive application of these carcinogenic compounds in different industries has led to their resistance against biological and physicochemical treatments [26,27,28,29,30,31], making the conventional treatment methods ineffective [32]. Various techniques such as hydrothermal [33], sol-gel process [13], chemical co-precipitation [34], template-assisted method [35], thermal decomposition [36], and vapor-solid growth techniques [37] have been exploited for the synthesis of INPs, each suffering from several drawbacks, including a) toxic by-products whose removal requires special treatments, b) high temperature, c) the need for substrate or templates necessitating pre-manufacturing and post-removal difficulties, and d) contaminants which may cause further ecological damages [38,39]. Today, significant efforts have been dedicated to the expansion of green and more environmentally benign processes in the chemical industry.…”

Magnetic Nanoparticles as MRI Contrast Agents

“…They also observed differences in hematite particle size and morphology when using different precursors, with iron acetate giving rise to smaller spherical particles, while iron nitrate led to larger, quasi cubic particles. These differences were due to the water content as well as the presence of nitrate and carboxylate in the precursors [ 108 ]. More recently, Hu et al [ 109 ] reported a new explosion-assisted sol–gel method in which they used ferric nitrate as precursor and citric acid as chelating agent to form a gel.…”

Crystallographic phase formation of iron oxide particles produced from iron nitrate by liquid flame spray with a dual oxygen flow

“…Sol-gel and thermal decomposition syntheses from FeN-OxA mixtures have been performed at 400 o C, resulting in pure hematite. 33,34 A chemical synthesis at 250-450 o C from a FeN-OxA mixtures 35 , and thermolysis at 155 o C 36 , both also resulted in pure hematite. These studies did not Accepted Article involve a calcination period at a high temperature, so a transformation from maghemite to hematite was very unlikely.…”