Surfactant-free synthesis of a novel octahedral ZnFe2O4/graphene composite with high adsorption and good photocatalytic activity for efficient treatment of dye wastewater

Solvothermal synthesis of octahedral and magnetic CoFe2O4–reduced graphene oxide hybrids and their photo-Fenton-like behavior under visible-light irradiation

“…In addition, the adsorption and photodegradation rate of the CoFe 2 O 4 –RGO(70) hybrid for the anionic dye (MO) was lower when compared with that of the cationic dye (MB), and this was attributed to the repulsive forces that exist between MO and the –OH/R–COO − groups on the surface of CoFe 2 O 4 –RGO(70) hybrid. 48 Furthermore, the original photodegradation rate is high, i.e. without adding a quenching agent into the reaction solution, and the degree of MB photodegradation was as high as 53.3%.…”

“…Furthermore, the CoFe 2 O 4 –RGO(35) and CoFe 2 O 4 –RGO(70) exhibit classical type H3 hysteresis loops, arising from the capillary condensation and slit-shaped type pore structure of the RGO nanosheets. 48 In addition, the specific surface area of graphene oxide (GO) raw material was estimated to be as high as 556.38 m 2 g −1 (Fig. S3 † ).…”

“…All the samples exhibit typical II-type curves with steep uptakes (P/P 0 > 0.95) and distinct hysteresis loops (0.40 < P/P 0 < 0.95), indicating the co-existence of non-ordered mesopores (2-50 nm), and numerous macropores (>50 nm). 47 The 48 In addition, the specic surface area of graphene oxide (GO) raw material was estimated to be as high as 556.38 m 2 g À1 (Fig. S3 † The fabrication process of the octahedral CoFe 2 O 4 -RGO hybrids in this study is depicted in Fig.…”

Construction of adsorbents with graphene and its derivatives for wastewater treatment: a review

“…133) m 2 g −1 ) and actual ( e.g. , 624.0, 134 556.4, 135 and 412.7 (ref. 136) m 2 g −1 ) values of graphene and its derivatives.…”

Preparation and performance of CuFe2O4 and ZnFe2O4 magnetic nanocrystals

“…Nanoscale ferrite particles have unique optical, electrical, and magnetic properties dependent on their particles size, shape, and dispersion. Many methods e.g., co-precipitation, sol-gel, solid state reaction, microwave and hydrothermal methods have achieved nano/micro structures ZnFe 2 O 4 [10][11][12][13] and CuFe 2 O 4 [14,15] with virous size and shape. However, the expensive and complicated procedure, high reaction temperature can limit its large synthesis.…”