title: Photocatalytic degradation of phenol using Ag core-TiO2shell (Ag@TiO2) nanoparticles under UV light irradiation.
abstract: Ag@TiO2nanoparticles were synthesized by one pot synthesis method with postcalcination. These nanoparticles were tested for their photocatalytic efficacies in degradation of phenol both in free and immobilized forms under UV light irradiation through batch experiments. Ag@TiO2nanoparticles were found to be the effective photocatalysts for degradation of phenol. The effects of factors such as pH, initial phenol concentration, and catalyst loading on phenol degradation were evaluated, and these factors were found to influence the process efficiency. The optimum values of these factors were determined to maximize the phenol degradation. The efficacy of the nanoparticles immobilized on cellulose acetate film was inferior to that of free nanoparticles in UV photocatalysis due to light penetration problem and diffusional limitations. The performance of fluidized bed photocatalytic reactor operated under batch with recycle mode was evaluated for UV photocatalysis with immobilized Ag@TiO2nanoparticles. In the fluidized bed reactor, the percentage degradation of phenol was found to increase with the increase in catalyst loading.
authors.affiliation: Department of Chemical Engineering, National Institute of Technology Karnataka Surathkal, Srinivasnagar Post, Mangalore, 575025, India.
authors.forename: Amruta
authors.initials: A
authors.lastname: Shet
authors.affiliation: Department of Chemical Engineering, National Institute of Technology Karnataka Surathkal, Srinivasnagar Post, Mangalore, 575025, India. vidyaks68@yahoo.com.
authors.forename: Vidya
authors.initials: V
authors.lastname: Shetty K
mesh_terms: D002384:Catalysis; D002482:Cellulose / Q000031:analogs & derivatives / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D019800:Phenol / Q000032:analysis* / Q000528:radiation effects; D012834:Silver / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D019800:Phenol; C005062:acetylcellulose; D012834:Silver; D002482:Cellulose; D014025:Titanium
keywords: Ag@TiO2; Fluidized bed reactor; Nanoparticles; Phenol; Photocatalysis