In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue

Abstract

A novel ZnO–GO/CGH composite was prepared using an in situ synthesis process for photodegradation of methylene blue under visible light illumination.

Facile one-pot synthesis of heterostructure SnO2/ZnO photocatalyst for enhanced photocatalytic degradation of organic dye

“…In order to obtain visible light active photocatalyst, Di et al synthesized ZnO-GO coupled chitin graphene hydrogel (ZnO-GO/CGH) for degrading methylene blue. 38 The as-synthesized nanocomposite exhibited higher photocatalytic activity for the degradation of methylene blue under visible light irradiation. The higher activity was due to the improved charge separation resulting from the movement of the photogenerated holes and electrons to different locations on the surface of ZnO-GO/CGH, In another study, Wang et al fabricated ZnO p-n homojunctions by depositing n-type ZnO nanoparticles on the surface of p-type ZnO nanoparticles.…”

Nanochitin for sustainable and advanced manufacturing

“…Support or additive for inorganic photocatalysts. Metal oxides and other inorganic nanoparticles, such as titanium dioxide (TiO 2 ), 147,148 zinc oxide (ZnO), 143,149 copper oxide (Cu 2 O) 144 and carbon nitride (C 3 N 4 ), 145 can be deposited on the surface of nanochitin and used as a catalyst for various reactions. The biodegradability of nanochitin is advantageous, given that it reduces the environmental impact of catalyst synthesis and use.…”

Recent Advances in Biopolymer-Based Dye Removal Technologies

“…Their results demonstrated a 95% decolorization of the dye at 30 min of reaction, and significant mineralization of 80% was observed at 180 min. A novel chitin graphene hydrogel (CGH) supported zinc oxide-graphene oxide (ZnO–GO) composite was investigated by Di and coworkers for the removal of methylene blue (MB) under visible light and showed a photocatalytic performance of 99% after 150 min [ 93 ]. Their recyclability studies also showed a photodegradation efficiency of 93% after five repetitions.…”

“…The authors reported that the high oxidative decolorization efficiency of MB is due to increased dye adsorption by chitin [ 91 ]. Table 5 compares dye degradation efficiencies of the biopolymer-based AOP processes discussed in this review [ 78 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 ].…”