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Two-dimensional porous Cu-CuO nanosheets: Integration of heterojunction and morphology engineering to achieve high-effective and stable reduction of the aromatic nitro-compounds

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Chinese Chemical Letters 2023年第2期34卷 598-603页

作者： Xinran Dong Zexu Fang Ying Gu Xiaoguang Zhou Chungui Tian College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of ChinaHeilongjiang UniversityHarbin 150080China

The morphology and heterojunction engineering are effective ways to boost the performance of Cubased catalysts. Herein, we have reported the designed synthesis of two-dimensional Cu-Cu O heterojunction nanosheets(2D Cu-Cu O NS) based on 3-aminopropyl-triethoxysilane(APTES, KH550) aided synthetic strategy. The APTES can act as both the ligand and alkali(-OH) source to guide the large-scale synthesis of 2D Cu-based precursor, which can transform into 2D Cu-Cu O NS by the controllable *** Si species from APTES can protect the particles from the severe aggregation and growth, guaranteeing the formation of 2D sheets composed of small-sized Cu-Cu O heterojunction(about 20 nm). The heterojunction interfaces can provide plentiful active sites to boost the catalytic ability. The 2D sheets can provide large accessible surface, being conducive to the contact of the catalyst and reactants. Benefiting from above virtues, the 2D Cu-Cu O NS showed the superior catalytic performance for the reduction of a series of nitro compounds, being superior to most reported non-noble metal-based catalysts. Notably,it exhibited good re-cycled performance with no obvious performance degradation after 10 consecutive catalysis. The present study will be promising to promote the application of the Cu-based catalysts, due to its ability to control the morphology and potential for the large-scale synthesis.

关键词： Cu-CuO heterojunction Two-dimensional sheets Porous nitro-compounds Hydrogenation

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Anaerobic Biotransformation of nitro-compounds to Amines by Bovine Rumen Fluid

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Green and Sustainable Chemistry 2011年第3期1卷 47-53页

作者： Alfonso Rodríguez Ignacio Irazoqui Guzmán álvarez Cecilia Cajarville José Luis Repetto Mercedes González Hugo Cerecetto 不详

Microorganims of the bovine rumen fluid biocatalyzed the reduction of nitro-compound substrates to yield the respective amines. This enzymatic process, using ruminal contents, has rarely been reported in associa- tion with the bioreduction of nitro groups. The biotransformation reactions catalyzed by this system were de- pendent of both the electronic characteristics and the area/volume of the nitro-substrates confirming the processes are enzymatic. The semi-preparative scale biotransformation went by in good yield showing the rumen fluid may be employed in the synthesis of amines under very mild conditions and, moreover, it may have application in the bioremediation of nitro-compounds.

关键词： Biotransformation nitro-compounds Amines Rumen Ruminal Fluid Bovine

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Fabrication of hierarchical MXene-based AuNPs-containing core-shell nanocomposites for high efficient catalysts

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Green Energy & Environment 2018年第2期3卷 147-155页

作者： Kaikai Li Tifeng Jiao Ruirui Xing Guodong Zou Qianran Zhao Jingxin Zhou Lexin Zhang Qiuming Peng Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University State Key Laboratory of Metastable Materials Science and Technology Yanshan University State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences

MXene is a new type of layered two-dimensional transition metal carbide materials differing from graphene, demonstrating intriguing chemical/physical properties. Here the chemical modification of MXene and next fabrication of core-shell MXene-COOH@(PEI/PAA)_n composites have been investigated. The obtained MXene-based composites were treated with gold nanoparticles to form MXene—COOH@(PEI/PAA)_n@AuNPs nanocomposites, and their catalytic properties for nitro-compounds were studied. The prepared nanocomposites demonstrated good catalytic activity and reproducibility, showing potential applications in composite catalysts and environmental fields.

关键词： MXene Core-shell composite nitro-compounds Gold nanoparticle Catalytic activity

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