Photocatalytic performance of CuAl layered double hydroxide nanocomposites with AuPd bimetallic particles and cyclodextrins for dye degradation and nitro reduction under sunlight
Source abstract
Abstract
Environmental contamination caused by industrial dyes and nitro compounds has become a growing concern due to their negative effects on human health and aquatic ecosystems, due to their stability in water and harmful effects to health. This study developed the use of a ternary system composed of layered double hydroxide (LDH), gold/palladium (AuPd) bimetallic catalyst and cyclodextrins (CD) to photo-decompose a model dye (methyl orange) and photo-reduce a model nitro-compound (nitrobenzene). The ternary catalysts were characterized by powder X ray diffraction, Fourier-transform infrared spectroscopy, diffuse reflectance spectroscopy, scanning and transmission electron microscopies, and X rays photoelectron spectroscopy. The combined use of cyclodextrins, citrate and LDH partially influenced the stability of gold nanoparticles and the reduction of Pd2+. Additionally, beta-hydroxypropylated-CD at a molar ratio of CD:Pd = 5:1 as well as the CuAl LDH as support were crucial for achieving optimal catalytic results: 93.6% of dye removal (120 min, at 40 °C) and 98.5% of nitroaromatic reduction (180 min, at room-temperature) under substrate:reductant ratio as low as 1:2.5. The enhanced catalytic activity exhibited by the Ausingle bondPd NP supported on Cu/Al LDH demonstrated a remarkable synergy between the two noble metals (some alloy effects) and the copper-containing LDH support.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Layered Double Hydroxides Synthesis and Applications · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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