02497nas a2200265   4500008004100000022001400041245016000055210006900215260000800284300001500292490000700307520156200314653002301876653001301899653002501912653001801937653002301955100002101978700002201999700002502021700002502046700002502071700001602096856011902112       2025                        eng d  a2192-650600aSynergistic effect of acidic-basic features of copper-doped layered double hydroxides nanocatalysts in valorization of biomass-derived furfural to biofuels0 aSynergistic effect of acidicbasic features of copperdoped layere  cDEC  ae2025004160 v903 a<p>
	Valorization of biomass-derived chemicals into high-quality compounds and biofuels is enormously fundamental to diminish dependence on fossil-based resources. Furfural is a bio-based valuable compound which can be proficiently upgraded to 4-(2-furyl)-3-buten-2-one (FAc) and 1,4-pentadiene-3-one, 1,5-di-2-furanyl (F 2 Ac) via aldol condensation of furfural with acetone. In the present work, efficient Cu-doped Mg-Al layered double hydroxides (LDH) nanocatalysts are fabricated by coprecipitation and are exploited for furfural conversion to obtained FAc and F 2 Ac. The structure-activity relationship is scrutinized by characterizing fresh and spent nanocatalysts via numerous techniques. The good correlation between the amount of weak acidic-weak basic catalytic sites and nanocatalysts performance is established. The superior performance of Cu-0.1 nanocatalyst (Cu-content = 1.85 wt%) in aldol condensation is attributed to the presence of optimum weak acidic sites (0.21 mmol g-1) and weak basic sites (0.36 mmol g-1), synergistic acidic-basic effect, nano-sized Cu(OH) 2 nanoparticles (1.6 nm), high BET surface area (181 m2 g-1), and mesoporous architecture of material. Cu-0.1 nanocatalyst delivered 98% FAc selectivity with 100% furfural conversion at 85 degrees C. Furthermore, at 100 degrees C, the nanocatalyst gives 55% F 2 Ac selectivity with 73% furfural conversion. The catalyst displays good recyclability (7 recycles) and stability. Plausible mechanistic pathway for transformation of furfural to FAc and F 2 Ac is proposed.</p>
10aAldol condensation10abiofuels10abiomass valorization10ananocatalysis10asynergistic effect1 aGode, Nilesh, G.1 aNagpure, Atul, S.1 aRewatkar, Suresh, B.1 aBhagat, Shailesh, K.1 aDeshmukh, Ganpat, D.1 aSaini, Ajay  uhttps://library.ncl.res.in/content/synergistic-effect-acidic-basic-features-copper-doped-layered-double-hydroxides02641nas a2200265   4500008004100000022001400041245015200055210006900207260000800276300001100284490000800295520166500303653002301968653003001991653003102021653002802052653003402080100002502114700002202139700002502161700002102186700002502207700001602232856012702248       2025                        eng d  a1387-700300aUpgradation of biomass-derived furfural by nanostructured layered double hydroxides: Influence of stirring rate on structural features of materials0 aUpgradation of biomassderived furfural by nanostructured layered  cFEB  a1137560 v1723 a<p>
	The proficient conversion of biomass-derived compounds into the high-quality platform chemicals and bio-fuels is enormously imperative to decrease dependence on fossil feedstock. Furfural is a significant bio-based chemical which can be efficiently converted to valuable 4-(2-furyl)-3-buten-2-one (FAc) via aldol condensation. In this work, we have developed prominent layered double hydroxides (LDHs) catalysts for mild aldol condensation of furfural and acetone to acquired high performance with admirable FAc selectivity. Various nanostructured Mg-Al LDHs were synthesized through co-precipitation procedure under different stirring rate conditions. The structural, morphological and optical attributes of materials as well as recyclability aspect and structure-activity relationship was examined by characterizing the fresh and spent catalysts via numerous techniques (XRD, N2 sorption, DLS, CO2-TPD, NH3-TPD, FT-IR, UV-Visible spectroscopy, TGA, SEM, TEM, ICP-OES, 27Al NMR spectroscopy, XPS, Raman spectroscopy, etc). Several reaction parameters were also optimized. Among the catalysts tested, LDH-1200 catalyst exhibits outstanding performance by delivering 100% furfural conversion with 99% FAc selectivity. Moreover, catalyst illustrates excellent recyclability and stability. The mechanistic insight for aldol condensation was also investigated by monitoring the intermediates at different stages and intervals during the course of the reaction. This study confirms that stirring rate has significant influence on physico-chemical attributes of materials and the amount of weak basic sites plays imperative role in catalytic performance.</p>
10aAldol condensation10aBiomass-derived compounds10aFlower-shaped nanocrystals10aheterogeneous catalysis10aNanostructured mesoporous LDH1 aBhagat, Shailesh, K.1 aNagpure, Atul, S.1 aLanjewar, Mamata, R.1 aGode, Nilesh, G.1 aDeshmukh, Ganpat, D.1 aSaini, Ajay  uhttps://library.ncl.res.in/content/upgradation-biomass-derived-furfural-nanostructured-layered-double-hydroxides-influence