MgO nanostructure via a sol-gel combustion synthesis method using different fuels: An efficient nano-adsorbent for the removal of some anionic textile dyes

Tunable auto-combustion preparation of TiO2nanostructures as efficient adsorbents for the removal of an anionic textile dye

“…Hence, TiCl 4 as a relatively inexpensive material was converted into TiO(NO 3 ) 2 . 37,38 The combustion reactions were performed using the in situ generated TiO(NO 3 ) 2 as an oxidizer and L-alanine, glycine, and urea as fuels, separately. Moreover, different fuel-to-oxidant equivalence ratios (F c ): 0.5, 1, 1.5, 2, and 2.5, have been examined to produce the most appropriate TiO 2 nanoparticles for the removal of RR195 textile dye from aqueous media.…”

“…Moreover, the point of zero charge (pH PZC ) of the as-prepared TiO 2 product (U1) was estimated because the surface charge of the nanoparticles suspended in a medium is dependent on the pH values of that medium as reported previously. 38 The point of zero charge value (pH pzc ) of TiO 2 nanoparticles was determined using the reported pH dri method 2,4,50 where we used TiO 2 suspensions in sodium chloride solutions (0.01 M) of various initial pH values in the range of 1.3-11. Then the pH pzc value is the intersection point between the pH initial À pH nal and pH initial ¼ pH nal curves, as displayed in Fig.…”

“…The inuence of these competing inorganic ions raises an essential issue since they can control both the electrostatic and non-electrostatic interactions which may be held between the adsorbate and the adsorbent surface. 38 We investigated the effect of KCl concentrations on the adsorption of RR195 dye using the as-prepared TiO 2 product as an adsorbent under the adsorption conditions: 100 mg L À1 initial dye concentrations, pH 2, temperature of 25 C, and 0.05 g adsorbent dose. The experimental results depicted in Fig.…”

Bottom-Up and Top-Down Approaches for MgO

“…Various kind of nanoparticles like titanates [58], ferrites [59], carbonates [60], hydroxide [61] and oxides [62] are grown using this approach. Combustion synthesis is utilized for growing different kind of MgO nanostructures [63,64] and its derivative [65][66][67].…”

Comparison of Reactive Blue 203 Dye Removal Using Ultraviolet Irradiation, Ferrate (VI) Oxidation Process and MgO Nanoparticles

“…Many researchers have studied various methods of dye removal from wastewater such as biological processes, advanced oxidation processes and absorption processes (14)(15)(16)(17). Recently, Rai et al found that ferrate(VI) has coagulant properties during the oxidation of various contaminants in wastewater under different conditions (18).…”