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采用燃烧技术制备CuO纳米粒子:一种高效且环境友好的用于芳族醛合成芳族腈催化剂(英文)

催化学报 2013年第4期34卷 704-710页

作者： belladamadu siddappa anandakumar Muthukur Bhojegowd Madhusudana REDDY Chikka Nagaiah THARAMANI Mohamed Afzal PASHA Gujjarahalli Thimmanna CHANDRAPPA Department of Chemistry Bangalore University Department of Chemistry Ruhr Universit t Bochum

CuO nanoparticles were synthesized using an energy-efficient and rapid solution combustion technique with malic acid employed as a fuel. The combustion-derived CuO nanoparticles were used as catalysts in a one-pot synthesis of aromatic nitriles from aromatic aldehydes and hydroxylamine hydrochloride. The catalyst was characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, transmission electron microscopy, and Brunauer-Emmett-Teller surface area analysis. The catalytic activity of the CuO nanoparticles in the synthesis of aromatic nitriles from aromatic aldehydes was evaluated. The present protocol offers the advantages of a clean reaction, simple methodology, short reaction duration (1-2 min), and high yield (85%-98%). The catalytic activity of the CuO nanoparticles was found to be higher than that of bulk CuO powder under the same conditions. The catalyst can also be recovered and reused up to four times with no significant loss of catalytic activity. The present approach is inexpensive and is a convenient technique suitable for industrial production of CuO nanoparticles and nitriles.

关键词： Copper oxide Nanoparticle Solution combustion Nitrile Aldehyde Hydroxyl amine

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Combustion Derived Nanocrystalline-ZrO2 and Its Catalytic Activity for Biginelli Condensation under Microwave Irradiation

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Chinese Journal of Chemistry 2011年第9期29卷 1863-1868页

作者： Bhojegowd, Madhusudana Reddy M. Siddaramanna, Ashoka siddappa, anandakumar B. Thimmanna, Chandrappa G. Pasha, Mohamed A. Department of Studies in Chemistry Central College Campus Bangalore University Bengaluru-560001 India

Nanocrystalline zirconium（IV） oxide （nc-ZrO2） possessing high surface area was synthesized by a low tem- perature eco-friendly solution combustion method using a new organic fuel alanine. The powder XRD, SEM and surface area measurements were carried out for characterization of nc-ZrO2. The powder XRD results revealed that, the nc-ZrO2 has the pure tetragonal phase. The crystallite size calculated by Scherrer＇s formula and BET surface area were found to be ca. 53--57 nm and ca. 275 m2/g, respectively. SEM micrograph exhibited the macroporous nature of the powder, nc-ZrO2 has been employed as a catalyst for the solvent-free synthesis of 3,4-dihydro- pyrimidin-2-ones （DHPMs） by a microwave （MW） assisted one-pot, multicomponent Biginelli condensation reaction of araldehydes, ethylacetoacetate and urea or thiourea. DHPMs are obtained in good to excellent yields （85%-- 96%） under this reaction condition within short interval of time （10--20 min）.

关键词： nanocrystalline-ZrO2 solution combustion araldehydes ethylaceto acetate nano materials greenchemistry catalysis 3,4-dihydropyrimidinones

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