01927nas a2200217   4500008004100000022001400041245011600055210006900171260000800240300001600248490000700264520115800271100002101429700002101450700002101471700001801492700002301510700002501533700001901558856013201577       2019                        eng d  a0888-588500aPreparation and activity of copper-gallium nanocomposite catalysts for carbon dioxide hydrogenation to methanol0 aPreparation and activity of coppergallium nanocomposite catalyst  cNOV  a21331-213400 v583 a<p>Copper (Cu) nanocomposite catalysts with gallium (Ga) and aluminum (Al) were prepared using the simultaneous coprecipitation digestion method. The catalysts were characterized by N-2 adsorption, N2O titration, XRD (X-ray diffraction), H-2-TPR (H-2 temperature-programmed reduction), XPS (X-ray photoelectron spectroscopy), and CO2-TPD (CO2 temperature-programmed desorption) techniques, and CO2 hydrogenation to methanol synthesis was performed. The use of Ga in Cu catalysts enhanced the weak basic sites more than the Cu catalysts with Al. With the CuGa nanocomposite formation, the catalyst showed a sequential reduction of CuO, for example, Cu+2 to Cu+ to Cu-0, and the Cu surface area was also high in comparison with CuAl. These findings confirmed that both the Cu surface area and CuO reducibility in the catalyst helped to boost the conversion of CO2, whereas selectivity to methanol was associated with the basicity of the catalyst. CuAl catalysts showed very poor selectivity to methanol despite CO formation, which could be due to the weak interaction of the CuAl nanocomposite catalysts compared to the CuGa nanocomposite catalysts.</p>
1 aHengne, Amol, M.1 aYuan, Ding, Jier1 aDate, Nandan, S.1 aSaih, Youssef1 aKamble, Sanjay, P.1 aRode, Chandrashekhar1 aHuang, Kuo-Wei  uhttps://library.ncl.res.in/content/preparation-and-activity-copper-gallium-nanocomposite-catalysts-carbon-dioxide-hydrogenation01650nas a2200157   4500008004100000022001400041245010500055210006900160260000800229300001400237490000700251520104600258100003201304700002501336856013101361       2019                        eng d  a1463-926200aSelective hydrogenation of 5-HMF to 2,5-DMF over a magnetically recoverable non-noble metal catalyst0 aSelective hydrogenation of 5HMF to 25DMF over a magnetically rec  cDEC  a6390-64060 v213 a<p>A non-noble bimetallic catalyst Cu-Fe (1 : 2) was magnetically recoverable, highly selective and efficient for 5-(hydroxymethyl) furfural (5-HMF) hydrogenation to 2,5-dimethyl furan (DMF). The structure-activity correlation was established by characterising the prepared catalyst by XRD, XPS, TEM, ESEM, BET surface area, N-2-adsorption, NH3-TPD, pyridine-IR and H-2-TPR measurements. The high catalytic efficiency was attributed to the oxophilic nature and Lewis acidity of Fe, whereas the selectivity towards DMF was attributed to the Bronsted acidity of CuO and its affinity towards the C-O bond which was further confirmed by NH3-TPD and Py-IR analyses. XPS and XRD revealed the presence of Cu/CuFe2O4 species which catalyzed the hydrogenolysis pathway. TEM and SEM images evidenced the presence of a Cu-Fe nanomorph in which Cu/CuFe2O4 was present. The size of the Cu-Fe nanomorph was found to be between 15.4-17.6 nm. Under the optimised reaction conditions, the highest conversion of 97% and selectivity of 93% were achieved.</p>
1 aSolanki, Bhanupratap, Singh1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/selective-hydrogenation-5-hmf-25-dmf-over-magnetically-recoverable-non-noble-metal-catalyst01872nas a2200181   4500008004100000022001400041245008600055210006900141260000800210300001600218490000700234520123600241100002301477700002401500700002301524700002501547856011801572       2022                        eng d  a1144-054600aEnhanced anisole hydroxylation over a hierarchical micro/mesoporous TS-1 catalyst0 aEnhanced anisole hydroxylation over a hierarchical micromesoporo  cAUG  a14667-146750 v463 a<p>
	Hierarchical TS-1 materials were synthesized using hydrothermal synthesis and a post modification technique through desilication. They were evaluated for hydroxylation of anisole to produce industrially important chemicals, o-methoxyphenol (OMP) and p-methoxyphenol (PMP). The detailed characterization of the prepared catalysts, such as morphology, structure, nature of Ti and surface area were obtained by SEM, HR-TEM, XRD, UV-VIS spectroscopy and the BET technique. The effects of various operational parameters such as substrate/H2O2 molar ratio, reaction temperature, catalyst concentration and solvent effect on the hydroxylation of anisole have been studied in detail. The microporous TS-1 catalyst showed 32% anisole conversion with 34% selectivity to PMP, while the micro/mesoporous DTS-1 catalyst showed enhanced activity for anisole hydroxylation, i.e. 54% conversion with 55% selectivity towards PMP. The increased framework Ti and improved accessibility of the active sites located in the channels of DTS-1, which permit the mass transfer of reactants, transition states and products from the mesopores of DTS-1, were responsible for the enhanced catalytic activity and selectivity towards p-methoxyphenol.</p>
1 aPatil, Chetana, R.1 aNiphadkar, Prashant1 aKamble, Sanjay, P.1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/enhanced-anisole-hydroxylation-over-hierarchical-micromesoporous-ts-1-catalyst01750nas a2200241   4500008004100000022001400041245010900055210006900164260000800233300001500241490000600256520092800262653001001190653001101200653002401211653002801235653001701263100002301280700002901303700002301332700002501355856012801380       2022                        eng d  a2365-654900aHighly efficient chemoselective hydrogenation of 5-HMF to BHMF over reusable bimetallic Pd-Ir/C catalyst0 aHighly efficient chemoselective hydrogenation of 5HMF to BHMF ov  cJUN  ae2022004560 v73 a<p>
	Catalytic synergism was observed for a bimetallic Pd-Ir catalyst supported on activated carbon for chemoselective hydrogenation of 5-hydroxymetahyl furfural (5-HMF) to 2, 5-(bishydroxymethyl) furan (BHMF) with complete conversion and 97 % selectivity under very mild reaction conditions. The structural characterization like XRD, N-2 sorption, FE-SEM and TEM suggested formation of fine nanoparticles (1.95-3.08 nm) having very higher surface area, uniform distribution and mesoporous nature of the material. XPS spectra and Pyridine-IR spectroscopy revealed formation of Pd-PdO and Ir/IrO2/IrO3 interface on the catalytic surface along with strong Bronsted acidic sites which were responsible for high efficiency of catalyst at 80 degrees C, 100 psig H-2 pressure at 5-HMF/Catalyst=20 and within 2.5 h of reaction time. A plausible reaction mechanism is also elucidated based on structure activity correlation.</p>
10a5-HMF10aCarbon10aCatalytic synergism10aSelective hydrogenation10aValorization1 aRatrey, Geetanjali1 aSolanki, Bhanupratap, S.1 aKamble, Sanjay, P.1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/highly-efficient-chemoselective-hydrogenation-5-hmf-bhmf-over-reusable-bimetallic-pd-irc02391nas a2200229   4500008004100000022001400041245012500055210006900180260000800249300001100257490000800268520158000276653001701856653002801873653001201901653002201913653002701935100002201962700002301984700002502007856012902032       2022                        eng d  a0961-953400aIntegrated chemo and bio-catalyzed synthesis of 2,5-furandicarboxylic acid from fructose derived 5-hydroxymethylfurfural0 aIntegrated chemo and biocatalyzed synthesis of 25furandicarboxyl  cJUN  a1064740 v1613 a<p>
	Biomass being a renewable source of energy, has emerged as an attractive target for manufacturing valuable products. These possibilities can be explored to meet the current need for degradable plastic, 2,5-furandicarboxylic acid (FDCA). Integration of chemical and biological approaches for direct biomass conversion into FDCA was evaluated in this study. 5-hydroxymethylfurfural (5-HMF) was chemo-catalytically obtained from fructose using recyclable amberlyte IR-120 as a catalyst with &gt;98% purity. Klebsiella oxytoca NCIM 2694 bacterial strain showed the potential of converting 98% of 5-HMF into FDCA with 58% selectivity at 96 h. With optimized conditions of pH 7, 37 degrees C, 2 g whole cells, we reported 99% 5-HMF conversion to FDCA with 95% selectivity at 72 h and 2667 mg L-1 yield, with 39 mg L-1 h-1 productivity. This is the highest yield obtained with the substrate concentration as high as 3000 mg L-1 reported till date. While the bacterial tolerance to 5-HMF observed was for the highest 5-HMF concentration of 4000 mg L-1, with 99% conversion however, compromising the FDCA yield to 2447 mg L-1 and 32 mg L-1 h-1 productivity. Atom economy of 85% and E factor of 17.71 g g-1 was obtained as a measure of its efficiency and sustainability of the process. The developed process will decrease the cost by excluding any extra nutrient supplement, complete substrate utilization, highest FDCA selectivity/productivity and higher tolerance by K. oxytoca, sequentially catalyzing the oxidations by a single route for FDCA synthesis from renewables.</p>
10abiocatalysis10aBiodegradable polyester10aBiomass10aPlatform chemical10aSustainability metrics1 aParate, Roopa, D.1 aDharne, Mahesh, S.1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/integrated-chemo-and-bio-catalyzed-synthesis-25-furandicarboxylic-acid-fructose-derived-501726nas a2200169   4500008004100000245021200041210006900253260000900322300001400331490000700345520098300352100002601335700002501361700002401386700002201410856012401432       2022                        eng d00aSynthesis of indeno-[1,2-b]-quinoline-9,11(6H,10H)-dione and 7,7-dimethyl-10-aryl-7,8-dihydro-5H-indeno[1,2-b]quinoline-9,11(6H,10H )-dione derivatives in presence of heterogeneous Cu/zeolite-Y as a catalyst0 aSynthesis of indeno12bquinoline9116H10Hdione and 77dimethyl10ary  cJAN   a2083-20930 v123 aA simple method for the synthesis of indeno-[1,2-b]-quinoline-9,11-(6H,10H)-dione derivatives and 7,7-dimethyl-10-aryl-7,8-dihydro-5H-indeno[1,2-b]quinoline-9,11(6H,10H )-diones through the reaction of aromatic aldehydes, indan-1,3-dione, dimedone, and p-toluidine/ammonium acetate in the presence of heterogeneous CuO supported on a zeolite-Y catalyst has been investigated in ethanol under reflux conditions. By this method, the reaction time has been reduced, giving an excellent yield of the product. The catalyst was prepared by a hydrothermal method followed by a wet impregnation method. The catalyst had shown Bronsted acid sites and Lewis acid sites. The used catalyst could be actively recycled with a marginal decrease in yield up to five recycles. The prepared catalyst was characterized by FT-IR, pyridine FT-IR, XRD, SEM, EDS, XPS, TEM, and BET surface area analysis. The synthesized compounds were characterized by FT-IR, H-1 NMR, C-13 NMR and GC-MS spectroscopy.1 aDhengale, Shankar, D.1 aRode, Chandrashekhar1 aKolekar, Govind, B.1 aAnbhule, Prashant  uhttps://library.ncl.res.in/content/synthesis-indeno-12-b-quinoline-9116h10h-dione-and-77-dimethyl-10-aryl-78-dihydro-5h