Ni2+ supported on hydroxyapatite-core-shell γ-Fe2O3 nanoparticles: a novel, highly efficient and reusable lewis acid catalyst for the regioselective azidolysis of epoxides in water

Synthesis, characterization, and application of α‐Fe2O3@TiO2@SO3H photo‐Fenton catalyst for photocatalytic degradation of biologically pre‐treated wood industry wastewater

“…The spectra of FT‐IR analysis of the α‐Fe 2 O 3 , α‐Fe 2 O 3 @TiO 2 , and α‐Fe 2 O 3 @TiO 2 @SO 3 H are shown in Figure 2. The spectrum of FT‐IR of α‐Fe 2 O 3 catalyst is similar to the previous result, shown in Figure 2a (Sajjadifar et al, 2014). The broadband at 3423 cm −1 is related to the fundamental stretching vibration of free or bonded hydroxyl groups.…”

“…The stretching modes of ( OH) and bending vibration due to the free or adsorbed water molecules were observed at 3417, 1726, and 1628 cm À1 peaks. Moreover, the characteristics of 544 and 457 cm À1 bonds were similar to (Fe O) bonds (Sajjadifar et al, 2014). The broad bond of the vibrational stretching (Ti O Ti) bonds in the TiO 2 lattice (450-750 cm À1 ) had overlapped with the stretching vibrations of (Fe O) bonds (Cheng et al, 2004).…”

“…The magnetic α‐Fe 2 O 3 @TiO 2 @SO 3 H photocatalyst was synthesized in three steps (Figure 1). Firstly, a co‐precipitation technique was performed to synthesize the magnetic Fe 2 O 3 nanoparticle (Sajjadifar et al, 2014). In this study, FeCl 2 ·4H 2 O (0.198 g, 1 mmol), FeCl 3 ·6H 2 O (0.540 g, 2 mmol), and 30 ml of DW were mixed in a 50‐ml magnetically stirred glass vial.…”

Preparation and application of α-Fe2O3@MIL-101(Cr)@TiO2 based on metal–organic framework for photocatalytic degradation of paraquat

“…In this research, a novel magnetic α-Fe 2 O 3 @MIL-101(Cr)@TiO 2 photocatalyst was successfully synthesized via two stages. First, the α-Fe 2 O 3 @MIL-101(Cr) particles were synthesized using MIL-101(Cr) as the framework (Bhattacharjee and Chena Ahn, 2014) and α-Fe 2 O 3 as magnetic properties by a coprecipitation method from previous work (Sajjadifar et al, 2014). Second, the anatase TiO 2 was coated on the α-Fe 2 O 3 @MIL-101(Cr) particle surface using TBOT as titanium source via sol–gel technology (He et al, 2012).…”

“…First, the magnetic Fe 2 O 3 @MIL-101(Cr) nanoparticle was prepared using a coprecipitation method (Sajjadifar et al, 2014). In a typical synthesis, FeCl 2 ·4H 2 O (0.198 g, 1 mmol), FeCl 3 ·6H 2 O (0.540 g, 2 mmol), and 30 mL DW were added to an aqueous suspension (10 mL) containing 0.5 g of MIL-101(Cr).…”