title: Cysteine-assisted tailoring of adsorption properties and particle size of polymer and carbon spheres.
abstract: A series of cysteine-stabilized phenolic resin-based polymer and carbon spheres were prepared by the modified Stöber method. Cysteine plays a very important role in the proposed one-pot synthesis of the aforementioned spheres; namely, it acts as a particle stabilizer and a source of heteroatoms (nitrogen and sulfur) that can be introduced into these spheres. The diameter of these spheres can be tuned in the range of 70-610 nm by adjusting the cysteine amount and reaction temperature. Since polymer spheres obtained in the presence of cysteine contain sulfur and nitrogen heteroatoms, they were tested for adsorption of copper ions. It is shown that adsorption isotherms recorded for copper ions can be well fitted by Langmuir equation, giving unprecedented adsorption capacities up to ~65 mg/g.
authors: Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242, United States.
authors: Nilantha P
authors: NP
authors: Wickramaratne
authors: Vindya S
authors: VS
authors: Perera
authors: James M
authors: JM
authors: Ralph
authors: Songping D
authors: SD
authors: Huang
authors: Mietek
authors: M
authors: Jaroniec
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D019327:Copper Sulfate / Q000302:isolation & purification*; D003545:Cysteine / Q000737:chemistry*; D005557:Formaldehyde / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010316:Particle Size; D010636:Phenols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry; D013696:Temperature; D018508:Water Purification / Q000379:methods
chemical_list: D010636:Phenols; D011108:Polymers; D005557:Formaldehyde; D013455:Sulfur; D002244:Carbon; C011529:phenol-formaldehyde resin; D003545:Cysteine; D019327:Copper Sulfate; D009584:Nitrogen