<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Gode, Nilesh G.</style></author><author><style face="normal" font="default" size="100%">Nagpure, Atul S.</style></author><author><style face="normal" font="default" size="100%">Chilukuri, Satyanarayana V.</style></author><author><style face="normal" font="default" size="100%">Bhagat, Shailesh K.</style></author><author><style face="normal" font="default" size="100%">Rewatkar, Suresh B.</style></author><author><style face="normal" font="default" size="100%">Saini, Ajay</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Aldol condensationof furfural to fuel precursor overCu-doped layered double hydroxide nanocatalysts</style></title><secondary-title><style face="normal" font="default" size="100%">Energy &amp; Fuels</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2026</style></year><pub-dates><date><style  face="normal" font="default" size="100%">JUL</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">40</style></volume><pages><style face="normal" font="default" size="100%">15267-15287</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;
	The conversion of biomass-derived molecules into high-value chemicals and biofuels represents a promising strategy to diminish dependence on nonrenewable fossil resources. Furfural, a lignocellulosic platform chemical, can undergo aldol condensation with acetone to yield valuable fuel precursor 4-(2-furyl)-3-buten-2-one (FAc). This work reports the nanotechnology-driven design and fabrication of active, recyclable, and structurally stable bifunctional Cu-doped layered double hydroxide (LDH) nanocatalysts (Cu = 1.73 wt %), developed via a memory-effect -assisted nanoscale reconstruction strategy. By integrating nanoscience-guided structural engineering with precise control over surface acidic-basic functionalities and material morphology, the resulting nanomaterials were exploited for the efficient conversion of furfural into FAc. The structure-activity relationships, recyclability, and catalytic robustness were assessed by characterizing the fresh and spent nanocatalysts using numerous techniques (XRD, N2 sorption, 27Al NMR, XPS, FE-SEM, EDX, TEM, ICP-OES, CO2-TPD, NH3-TPD, FT-IR, DLS, TGA, UV-Visible-DRS, and H2-TPR). These investigations provide fundamental nanoscience insight into how the rehydration process governs the physicochemical evolution of nanomaterials (acid-base, morphology, structure, and textural properties) and how these parameters collectively dictate the performance of reconstructed Cu-based nanocatalysts. A plausible mechanistic pathway for the cross-aldol condensation of furfural with acetone over the Cu-R24 nanocatalyst is proposed, wherein weak Br &amp;amp; oslash;nsted basic sites, weak acidic sites, and surface oxygen defect species serve as the key catalytically active sites. Rehydrated Cu-R24 gives 100% furfural conversion with 84% FAc selectivity (50 degrees C, 2.5 h). Moreover, the nanocatalyst retained activity and stability for five recycles. The superior activity of Cu-R24 with a good TOF value (1.1 mmol &amp;amp; centerdot;g-1 &amp;amp; centerdot;min-1) arises from acid-base synergy, flower-shaped nanocrystals, Cu-induced electronic structure modulation and oxygen-defect sites evolution, a high BET surface area (205 m2 g-1), uniformly dispersed ultrasmall Cu2+ nanoparticles (1.8 nm), optimal densities of active weak Br &amp;amp; oslash;nsted basic (0.62 mmol g-1) and weak acidic (0.26 mmol g-1) sites, and a mesoporous architecture (15.6 nm). XPS analysis revealed strong electronic coupling between Cu species and the Mg-Al host framework, along with the generation of surface oxygen defect sites, while CO2-TPD and NH3-TPD analyses confirmed well-balanced acidic-basic surface functionalities. Importantly, the combined XPS, CO2-TPD, and NH3-TPD results established that the synergistic modulation of electronic structure, oxygen defect density, and optimized acid-base characteristics played a decisive role in boosting the aldol condensation performance of the Cu-R24. By combining green, low-energy catalysis with biomass sustainability and nanoscale-engineered LDH memory-effect , this study delivers recyclable and stable Cu-based multifunctional nanocatalysts with industrial relevance for sustainable chemical manufacturing.&lt;/p&gt;
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	Foreign&lt;/p&gt;
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	6.0&lt;/p&gt;
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