Synthesis and evaluation of MSiO3 (M = Ba, Sr, Mg) for photocatalytic hydrogen generation under UV irradiation

Self-cleaning cellulose acetate/crystalline nanocellulose/polyvinylidene fluoride/Mg0.975Ni0.025SiO3 membrane for removal of diclofenac sodium and methylene blue dye in water

“…Mejia-Bernal et al prepared metal silicates, MSiO 3 (M = Ba, Sr and Mg) by combustion method to evaluate as photocatalyst in a hydrogen evolution, under UV light irradiation. The results showed that MgSiO 3 was the most promising silicate reaching 688 μmol.g −1 .h −1 [22]. According to these results obtained about the photocatalytic properties of MgSiO 3 , it is expected to be a good candidate for photocatalytic removal of pollutant in water.…”

“…The optical band gap (E g ) value for Mg 0.975 Ni 0.025 SiO 3 was determined by Kubelka-Munk method by extrapolation of the line of plot FR(hv) 1/2 versus energy and was found to be 2.65 eV (figure 4) [22]. Such band gap value reflects the effect of Ni doping in MgSiO 3 , since Ni doping leads to a band gap reduction of MgSiO 3 form its 3.99 eV value [22].…”

“…The optical band gap (E g ) value for Mg 0.975 Ni 0.025 SiO 3 was determined by Kubelka-Munk method by extrapolation of the line of plot FR(hv) 1/2 versus energy and was found to be 2.65 eV (figure 4) [22]. Such band gap value reflects the effect of Ni doping in MgSiO 3 , since Ni doping leads to a band gap reduction of MgSiO 3 form its 3.99 eV value [22]. This band gap reduction indicates that Ni doping leads to an effective absorption red shift towards the visible region, and in consequence Mg 0.975 Ni 0.025 SiO 3 is expected to be active under visible illumination as compared to the undoped MgSiO 3 nano-photocatalyst.…”

“…Furthermore, the photocatalytic membrane can be easily recovered from the solution to reuse next time, due to its self-cleaning properties. Nickel doped MgSiO 3 nano-photocatalyst was synthesized by combustion method [22]. The methodology consisted in dissolving 2.55 g of Mg(NO 3 ) 2 .H 2 O in 20 ml of deionized water under constant stirring.…”

Photocatalytic Removal of Ciprofloxacin in Water by Novel Sandwich-like CuFe2O4 on rGO/Halloysite Material: Insights into Kinetics and Intermediate Reactive Radicals

“…The reaction efficiency rises from 84% to 98% using the p-BQ trap (also known as the "•O 2 − "), and this phenomenon is caused by the trap's mechanism. The response is as follows [49]: The following empirical equations are used to determine the components' conduction band (CB) and valence band (VB) energy [50].…”