Magnetic semiconductor nano-photocatalysts for the degradation of organic pollutants

Novel magnetically separable g-C3N4/AgBr/Fe3O4 nanocomposites as visible-light-driven photocatalysts with highly enhanced activities

“…Separation of the suspended photocatalysts from large volumes of the treated solutions by filtration and centrifugation is the second drawback because it hinders practical applications at an industrial scale, owing to long operation times and high costs of required equipment. Magnetic photocatalysts, as new generation of photocatalysts, have provided an effective way for removing nanosized photocatalysts using an external magnetic field [7]. These photocatalysts are composed of magnetic and photoactive materials.…”

Fabrication of GO/magnetic graphitic nanocapsule/TiO2 assemblies as efficient and recyclable photocatalysts

“…The recyclability of GMG-TiO 2 in acidic solution was also investigated. As shown in Figure 4(a), the GMG-TiO 2 composite retained 100 wt% of its original photocatalytic activity, and about 91 wt% composite could be reused after ten recycle experiments (Figure 4(c)) [28][29][30][31]. Compared to the GMG-TiO 2 composite, the GF-TiO 2 composite could not be collected magnetically after only three recycle experiments in an acidic environment ( Figure 4(b) and (d)).…”

“…Figure 1(d) is the TEM image of GMGTiO 2 . TiO 2 and MGN modified onto the two dimensional graphene oxide surface [28][29][30], and the composites could be easily dispersed in water (inset image). The results of energy dispersive X-ray (EDX) confirm the existence of Ti, O, C, Fe, Co and Si elements (Figure 1(e)).…”

“…MGN was synthesized from a chemical vapor deposition (CVD) system as reported previously [28][29][30][31]. In brief, we dispersed fumed silica (1.00 g) with Fe(NO 3 ) 3 ·9H 2 O (0.145 g) and Co(NO 3 ) 2 ·6H 2 O (0.105 g) in 80 mL of methanol and sonicated the mixture for 1 h. The methanol was removed and the mixture was dried at 70 °C.…”

Preparation of TiO2/C/Fe3O4 Magnetic Composite Catalyst and Research of its Photocatalytic Performance

“…The first magnetic photocatalyst was prepared through the deposition of titanium dioxide onto a magnetite core in 1994 by Hiroshi F et al [2]. Liu S Q [3] reviewed the photocatalytic principle, structure and application of the magnetic semiconductor catalysts in his article. Based on the purpose of environmental protection and sewage treatment, this paper aims at magnetic TiO 2 photodegradation of organic dyes.…”