Size-controlled synthesis of hierarchical NiO hollow microspheres and the adsorption for Congo red in water

Adsorption removal of Congo red over flower-like porous microspheres derived from Ni/Al layered double hydroxide

“…NiO microspheres featuring a macroporous core and microporous shell. 37 It is worth mentioning that little work has been reported on the preparation of metal oxide products, consisting of a mesoporous-macroporous structure, via the calcination of LDHs and their utilization in the removal of Congo red thus far.…”

Nonsolvent/solvent-induced phase separation to multi-porous sulfonated polystyrene/chitosan/silver particles and their application in adsorbing chromium ion(III) and reduction of methylene blue

“…Owing to the low density, higher specific surface area, delivering ability, surface performance, and lower internal diffusion resistance, absorbents with hollow structure showed better performance compared to the traditional adsorbents used in the separation process [14][15][16]. However, the hollow microsphere is intensely easy to collapse in the process of drying [17].…”

Synthesis, characterization and adsorptive application of ferrocene based mesoporous material for hazardous dye Congo red

“…Maximum adsorption capacity for present study comes out to be 312.5 mg/g at 323 K, which is quite high as compare to other adsorbents used for its removal. Comparison of adsorption capacity with different nano/composites/mesoporous materials [47][48][49][50][51][52][53][54][55][56][57] used in the literature for the removal of dye Congo red is contained in Table 3. The value of C m increases with increase in temperature demonstrated the endothermic nature of adsorption process.…”