title: Photocatalytic activity and antimicrobial properties of paper sheets modified with TiO2/Sodium alginate nanocomposites.
abstract: Photocatalytic paper sheets were prepared by addition of different ratios of TiO2/Sodium alginate (TSA) nanocomposite. The modified paper sheets were characterized by XRD, TGA. Their morphology was studied by scanning electron microscope (SEM) and energy dispersive X-ray (EDX). Photocatalytic activity of modified paper has been studied by analysis of chemical oxygen demand (COD) of waste-water. The results confirmed the mineralization of the waste-water and enhanced removal of chemical oxygen demand (COD) by increasing the amount of photocatalyst in the paper. Moreover, the results also confirmed that presence of sodium alginate as biopolymer increased adhesion of nanoparticles to paper fibers and reduced the harmful effect of the photocatalyst on them. The paper sheets containing 7% as well as 15% TSA showed high photocatalytic activity and anti-bacterial effect against Salmonella typhimurium higher than standard antibiotic beside other microorganisms such as Candida albicans. The maximum antimicrobial effect was found in case of specimen loaded with 15% TSA. Moreover, it was found that by adding 20% TSA to the paper matrix, the properties of the paper composite collapse. The obtained results confirm the possible utilization of the modified paper in both hygienic and food packaging applications.
authors.affiliation: Packing and Packaging Materials Department, Division of chemical Industries Research. Electronic address: monaabdelrehim23@gmail.com.
authors.forename: Mona H
authors.initials: MH
authors.lastname: Abdel Rehim
authors.affiliation: Packing and Packaging Materials Department, Division of chemical Industries Research.
authors.forename: Magda A
authors.initials: MA
authors.lastname: El-Samahy
authors.affiliation: Physical Chemistry Department, Inorganic Chemical Industries and Mineral Resources Division.
authors.forename: Abdelrahman A
authors.initials: AA
authors.lastname: Badawy
authors.affiliation: Department of Microbial Chemistry, Genetic Engineering and Biotechnology Division National Research Centre, 33 El Behooth St., Dokki, Giza, Egypt.
authors.forename: Maysa E
authors.initials: ME
authors.lastname: Mohram
mesh_terms: D000464:Alginates / Q000737:chemistry / Q000494:pharmacology*; D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D002176:Candida albicans / Q000187:drug effects; D002384:Catalysis / Q000187:drug effects; D020723:Glucuronic Acid / Q000737:chemistry / Q000494:pharmacology; D006603:Hexuronic Acids / Q000737:chemistry / Q000494:pharmacology; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry / Q000648:ultrastructure; D010209:Paper; D010777:Photochemistry; D013052:Spectrometry, X-Ray Emission; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000464:Alginates; D000890:Anti-Infective Agents; D006603:Hexuronic Acids; C009495:titanium dioxide; D020723:Glucuronic Acid; D014025:Titanium
keywords: Antibacterial paper; Hygienic packaging; Nanocomposites; Photocatalyst