RT journal article
T1 Exploring the Photocatalytic Efficiency of Gold Nanoparticles Deposited on Ni-Al-Zr-Layered Double Hydroxides for Selective Glucose Oxidation
A1 Dib, Nihel
A1 Sauvage, Frédéric
A1 Quéhon, Lucie
A1 Khaldi, Khadidja
A1 Bedrane, Sumeya
A1 Calvino Gámez, José Juan
A1 Bachir, Redouane
A1 Blanco Montilla, Ginesa
A1 Pourceau, Gwladys
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 photocatalysis
K1 layered double hydroxides
K1 gold nanoparticles
K1 glucose oxidation
AB Confronting escalating challenges in energy security and environmental sustainability has intensified interest in renewable sources for fuels and chemicals. Among themost promising alternatives, sugars derived from biomass are emerging as a cornerstonein advancing an environmentally sustainable economy. Within this framework, the development of sunlight-driven carbohydrate oxidation is of significant interest, as it enablesthe production of a broad spectrum of high-value, bio-sourced chemicals through ecofriendly processes. Gold nanoparticles (Au NPs) immobilized on inorganic supports havedemonstrated considerable potential in this area, although the methodology still requiresfurther exploration. In this study, we explored the selective oxidation of glucose into thecorresponding gluconic acid salt in presence of a novel Au/Ni-Al-Zr-layered double hydroxide (LDH) photocatalyst under standardized A.M. 1.5 G light illumination. To optimizethe photocatalytic conditions, an experimental plan is herein proposed, highlighting thecritical influences of both catalyst loading and pH. In optimal conditions, the Au catalystdemonstrated a high efficiency, achieving 87% glucose conversion and 100% selectivitytowards gluconic acid in only 90 min. By means of long-pass filters to select the incidentlight energy to the photocatalytic reactor, we evidenced that the charge transfer processeswere occurring from the Ni-Al-Zr LDH support to the gold nanoparticles, thus openingnew directions towards further photocatalyst modifications. This work underlines thepotential of Au/LDH materials for sunlight-driven photocatalysis and provides a pathwayfor the sustainable production of high-value chemicals from renewable biomass sources.
PB MDPI
SN 1420-3049
YR 2025
FD 2025
LK http://hdl.handle.net/10498/36419
UL http://hdl.handle.net/10498/36419
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026