title: Synthesis of silver sulfide modified carbon materials for adsorptive removal of dibenzothiophene in n-hexane.
abstract: Carbon nanotube (CNT) and graphene oxide (GO) as common nanostructures were modified with silver sulfide (Ag2S) using chemical vapor deposition. The raw and modified materials were tested for the removal of Dibenzothiophene (DBT) from a model fuel in batch mode adsorption experiments. The maximum adsorption capacities of DBT were 52.18 and 49.65 mg g-1, using CNT-Ag2S and GO-Ag2S, respectively. The adsorption isotherm was modeled using Freundlich, Langmuir and Temkin models using linear and non-linear regression. The squared correlation coefficient (R2) and HYBRID error function were used to determine the best adsorption model. IR spectroscopy was used to study the DBT adsorption mechanism, and it was found that the DBT molecules lie flat on the surface of the developed adsorbents. Significant improvement was achieved in the adsorption of DBT using CNT-Ag2S and GO-Ag2S, where the maximum adsorption capacity increased by 127% and 117% respectively, which indicates a stronger interaction between DBT and the modified adsorbents.
authors.affiliation: a Chemistry Department , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.|b Center for Environment & Water (CEW) , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.
authors.forename: Mazen K
authors.identifier: http://orcid.org/0000-0001-5673-1900
authors.initials: MK
authors.lastname: Nazal
authors.affiliation: a Chemistry Department , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.
authors.forename: Mazen
authors.initials: M
authors.lastname: Khaled
authors.affiliation: c Chemical Engineering Department , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.|d Center of Excellence in Nano Technology (CENT) , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.
authors.forename: Isam H
authors.initials: IH
authors.lastname: Aljundi
authors.affiliation: e Qatar Environment and Energy Research Institute, Qatar Foundation , Doha , Qatar.
authors.forename: Muataz
authors.initials: M
authors.lastname: Atieh
authors.affiliation: a Chemistry Department , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.
authors.forename: Ghassan A
authors.initials: GA
authors.lastname: Oweimreen
authors.affiliation: a Chemistry Department , King Fahd University of Petroleum & Minerals (KFUPM) , Dhahran , Saudi Arabia.
authors.forename: Abdalla M
authors.initials: AM
authors.lastname: Abulkibash
mesh_terms: D000327:Adsorption; D004787:Environmental Pollution / Q000517:prevention & control*; D005742:Gasoline / Q000032:analysis*; D006108:Graphite / Q000032:analysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000032:analysis; D010087:Oxides / Q000032:analysis; D018030:Silver Compounds / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D005742:Gasoline; D037742:Nanotubes, Carbon; D010087:Oxides; D018030:Silver Compounds; D013876:Thiophenes; D006108:Graphite; C013251:silver sulfide; C016366:dibenzothiophene
keywords: Sulfur removal; adsorption; carbon nanotube; graphene oxide; nanoparticles