title: Cadmium-Aluminum Layered Double Hydroxide Microspheres for Photocatalytic CO2 Reduction.
abstract: We report the synthesis of cadmium-aluminum layered double hydroxide (CdAl LDH) using the reaction-diffusion framework. As the hydroxide anions diffuse into an agar gel matrix containing the mixture of aluminum and cadmium salts at a given ratio, they react to give the LDH. The LDH self-assembles inside the pores of the gel matrix into a unique spherical-porous shaped microstructure. The internal and external morphologies of the particles are studied by electron microscopy and tomography revealing interconnected channels and a high surface area. This material is shown to exhibit a promising performance in the photoreduction of carbon dioxide using solar light. Moreover, the palladium-decorated version shows a significant improvement in its reduction potential at room temperature.
authors.affiliation: Department of Chemistry, American University of Beirut, P.O.Box 11-0236, Riad El-Solh, 1107 2020, Beirut, Lebanon.
authors.forename: Daniel
authors.initials: D
authors.lastname: Saliba
authors.affiliation: Smart Hybrid Materials (SHMs) Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Alaa
authors.initials: A
authors.lastname: Ezzeddine
authors.affiliation: Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Rachid
authors.initials: R
authors.lastname: Sougrat
authors.affiliation: Smart Hybrid Materials (SHMs) Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Niveen M
authors.initials: NM
authors.lastname: Khashab
authors.affiliation: Department of Chemistry, American University of Beirut, P.O.Box 11-0236, Riad El-Solh, 1107 2020, Beirut, Lebanon. mohamad.hmadeh@aub.edu.lb.
authors.forename: Mohamad
authors.initials: M
authors.lastname: Hmadeh
authors.affiliation: Department of Chemistry, American University of Beirut, P.O.Box 11-0236, Riad El-Solh, 1107 2020, Beirut, Lebanon. mazen.ghoul@aub.edu.lb.
authors.forename: Mazen
authors.initials: M
authors.lastname: Al-Ghoul
mesh_terms: D000535:Aluminum / Q000737:chemistry* / Q000528:radiation effects; D002104:Cadmium / Q000737:chemistry* / Q000528:radiation effects; D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D006878:Hydroxides / Q000737:chemistry* / Q000528:radiation effects; D008863:Microspheres; D010084:Oxidation-Reduction; D013472:Sunlight
chemical_list: D006878:Hydroxides; D002104:Cadmium; D002245:Carbon Dioxide; D000535:Aluminum
keywords: cadmium/aluminum; carbon dioxide; layered double hydroxide; photoreduction; reaction diffusion framework