title: Novel guar gum/Al2O3 nanocomposite as an effective photocatalyst for the degradation of malachite green dye.
abstract: Guar gum/Al2O3 (GG/AO) nanocomposite was prepared using simple and cost effective sol-gel method. This nanocomposite was characterized by several analytical techniques viz. scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermal analysis (TGA/DTA), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible spectroscopy (UV-vis). The FTIR analysis confirmed that GG/AO composite material was formed. TEM images inferred the particle size in the range between 20 and 45nm. GG/AO nanocomposite exhibited good photocatalytic performance for malachite green (MG) dye (dye initial concentration 1.5×10(-5)M) degradation from aqueous phase. The adsorption followed by photocatalysis and coupled adsorption/photocatalysis reaction achieved about 80% and 90% degradation of MG dye under solar irradiation. Antibacterial test showed the excellent activity of GG/AO nanocomposite against Staphylococcus aureus.
authors.affiliation: School of Chemistry, Shoolini University, Solan, 173212 Himachal Pradesh, India.
authors.forename: Deepak
authors.initials: D
authors.lastname: Pathania
authors.affiliation: School of Chemistry, Shoolini University, Solan, 173212 Himachal Pradesh, India.
authors.forename: Rishu
authors.initials: R
authors.lastname: Katwal
authors.affiliation: School of Chemistry, Shoolini University, Solan, 173212 Himachal Pradesh, India. Electronic address: gaurav8777@gmail.com.
authors.forename: Gaurav
authors.initials: G
authors.lastname: Sharma
authors.affiliation: Department of Chemistry, College of Science, Building #5, King Saud University, Riyadh, Saudi Arabia. Electronic address: shad123@gmail.com.
authors.forename: Mu
authors.initials: M
authors.lastname: Naushad
authors.affiliation: Department of Chemistry, College of Science, Building #5, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Mohammad Rizwan
authors.initials: MR
authors.lastname: Khan
authors.affiliation: Department of Petroleum and Chemical Engineering, Faculty of Engineering, Sultan Qaboos University, Muscat, Oman.
authors.forename: Ala'a H
authors.initials: AH
authors.lastname: Al-Muhtaseb
mesh_terms: D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D005685:Galactans / Q000737:chemistry* / Q000494:pharmacology; D008351:Mannans / Q000737:chemistry* / Q000494:pharmacology; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010782:Photolysis; D053149:Plant Gums / Q000737:chemistry* / Q000494:pharmacology; D012394:Rosaniline Dyes / Q000737:chemistry* / Q000302:isolation & purification; D013211:Staphylococcus aureus / Q000187:drug effects; D013472:Sunlight
chemical_list: D000900:Anti-Bacterial Agents; D004396:Coloring Agents; D005685:Galactans; D008351:Mannans; D053149:Plant Gums; D012394:Rosaniline Dyes; C005095:malachite green; C007894:guar gum; D000537:Aluminum Oxide
keywords: Antibacterial activity; Dyes; Nanocomposite; Photodegradation