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Artículos de revistas sobre el tema "Nano-catalysis"

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Autor: Grafiati
Publicado: 6 de septiembre de 2023

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1

Yentekakis, Ioannis V., Dimitrios P. Gournis y Michael A. Karakassides. "Nanomaterials in Catalysis Applications". Catalysts 13, n.º 3 (21 de marzo de 2023): 627. http://dx.doi.org/10.3390/catal13030627.

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The interconnected rapid development of nanomaterials science and advanced analysis and imaging techniques at the nano-level scale (some “operando”) fostered the parallel growth of heterogeneous catalysis and its evolution into “nano-catalysis” [...]
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2

Yang, Fan, Dehui Deng, Xiulian Pan, Qiang Fu y Xinhe Bao. "Understanding nano effects in catalysis". National Science Review 2, n.º 2 (11 de mayo de 2015): 183–201. http://dx.doi.org/10.1093/nsr/nwv024.

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Abstract Catalysis, as a key and enabling technology, plays an increasingly important role in fields ranging from energy, environment and agriculture to health care. Rational design and synthesis of highly efficient catalysts has become the ultimate goal of catalysis research. Thanks to the rapid development of nanoscience and nanotechnology, and in particular a theoretical understanding of the tuning of electronic structure in nanoscale systems, this element of design is becoming possible via precise control of nanoparticles’ composition, morphology, structure and electronic states. At the same time, it is important to develop tools for in situ characterization of nanocatalysts under realistic reaction conditions, and for monitoring the dynamics of catalysis with high spatial, temporal and energy resolution. In this review, we discuss confinement effects in nanocatalysis, a concept that our group has put forward and developed over several years. Taking the confined catalytic systems of carbon nanotubes, metal-confined nano-oxides and 2D layered nanocatalysts as examples, we summarize and analyze the fundamental concepts, the research methods and some of the key scientific issues involved in nanocatalysis. Moreover, we present a perspective on the challenges and opportunities in future research on nanocatalysis from the aspects of: (1) controlled synthesis of nanocatalysts and rational design of catalytically active centers; (2) in situ characterization of nanocatalysts and dynamics of catalytic processes; (3) computational chemistry with a complexity approximating that of experiments; and (4) scale-up and commercialization of nanocatalysts.
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3

Sulikowski, B. "Nano-structured materials for catalysis". Catalysis Today 114, n.º 2-3 (mayo de 2006): 125. http://dx.doi.org/10.1016/j.cattod.2006.03.002.

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4

Molenbroek, Alfons M., Stig Helveg, Henrik Topsøe y Bjerne S. Clausen. "Nano-Particles in Heterogeneous Catalysis". Topics in Catalysis 52, n.º 10 (26 de junio de 2009): 1303–11. http://dx.doi.org/10.1007/s11244-009-9314-1.

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5

Polshettiwar, Vivek y Rajender S. Varma. "Green chemistry by nano-catalysis". Green Chemistry 12, n.º 5 (2010): 743. http://dx.doi.org/10.1039/b921171c.

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6

Lou, Bai Yang, Han Zhou y Bin Xu. "The Effects of Nano Pt/Carbon Black Compound Coating on the Electro-Catalysis Properties of the Graphite Electrode". Applied Mechanics and Materials 55-57 (mayo de 2011): 1774–77. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.1774.

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The modification of Nano Pt and carbon black compound coating on the fuel cell’s graphite electrode by the method of vacuum ion plating and ethanol catalytic combustion. The microstructures and the electro catalysis properties of the electrode surface before and after the modification were analyzed and tested with the methods of scanning electron microscope(SEM), transmission electron microscope(TEM), electrochemical workstation and so on. The effects of nano Pt and carbon black on the electrode’s electro catalysis properties were investigated. The Study results have shown that carrying on electrochemical properties test to the graphite electrode which has been treated with nano Pt and carbon black compound surface modification, there will be three oxidation peaks in its cyclic voltammograms and the background current will be higher. Compared with the nano Pt surface modification, the electrode which has been treated with nano Pt and carbon black compound surface modification has better ethanol electro catalysis properties. The high specific surface area acquired from the nano carbon black surface modification and the synergic action of the catalytic material Pt can improve the ethanol electro catalysis properties of the electrode effectively.
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7

Theofanidis, Stavros, Vladimir Galvita, Christos Konstantopoulos, Hilde Poelman y Guy Marin. "Fe-Based Nano-Materials in Catalysis". Materials 11, n.º 5 (17 de mayo de 2018): 831. http://dx.doi.org/10.3390/ma11050831.

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8

TONG, MIN-MING, MU NIU y TAO LIU. "A SENSOR OF ACETONE BASED ON ION-SENSITIVE FIELD-EFFECT TRANSISTOR". International Journal of Information Acquisition 06, n.º 02 (junio de 2009): 127–32. http://dx.doi.org/10.1142/s0219878909001813.

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With ion-sensitive field-effect transistor (ISFET) studied in this paper, nano- TiO 2- Al 2 O 3 insulation film was used as the gate electrode of ISFET. By this means, acetone was analyzed indirectly by detecting hydrogen ion dissociated from acetone solution. Under electric field function, the improvement of decomposition efficiency of acetone and the catalysis of nano- TiO 2 improved the sensitivity of sensor greatly. Based on experiments, the paper verified the effect of electric field and catalysis of nano- TiO 2.
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9

Ba, Shu Hong, Zhe Zhang, Ming Hui Yan, Zhe Xing Sun y Xin Peng Teng. "Effect of Nano-CuO on Luminous Intensity of Pyrotechnics Composite Containing KClO4 and Al". Applied Mechanics and Materials 217-219 (noviembre de 2012): 669–72. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.669.

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Nano-CuO had been successfully synthesized by using direct precipitation method. The prepared sample was characterized by XRD. The luminous intensities of pyrotechnics composite containing KClO4, Mg and nano-CuO were measured. The catalysis of CuO nanocrystal on KClO4 was investigated by thermal analysis instrument. The results show that the average size of nano-CuO is 19 nm and has spherical-shape. When nano-CuO is added into the pyrotechnics composites containing KClO4 and Al, it can improve the igniting and burning performance. The luminous intensity of trinary pyrotechnics composite is also greatly increased. On the other hand, nano-CuO can make thermal decomposition temperature of KClO4 to decrease 97.7 °C, the decalescence amount also reduced to 79.07 J/g. It is obviously that nano-CuO has strong catalysis to KClO4 thermal decomposition. The conclusion is consistent with the measure results of luminous intensity.
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10

Zhang, Yan, Xinjiang Cui, Feng Shi y Youquan Deng. "Nano-Gold Catalysis in Fine Chemical Synthesis". Chemical Reviews 112, n.º 4 (23 de noviembre de 2011): 2467–505. http://dx.doi.org/10.1021/cr200260m.

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11

Polshettiwar, Vivek y Rajender S. Varma. "ChemInform Abstract: Green Chemistry by Nano-Catalysis". ChemInform 41, n.º 40 (9 de septiembre de 2010): no. http://dx.doi.org/10.1002/chin.201040236.

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12

Molenbroek, Alfons M., Stig Helveg, Henrik Topsoe y Bjerne S. Clausen. "ChemInform Abstract: Nano-Particles in Heterogeneous Catalysis". ChemInform 41, n.º 33 (24 de julio de 2010): no. http://dx.doi.org/10.1002/chin.201033224.

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13

Liu, Tong, Nan Chen, Yang Deng, Fangxin Chen y Chuanping Feng. "Degradation of p-nitrophenol by nano-pyrite catalyzed Fenton reaction with enhanced peroxide utilization". RSC Advances 10, n.º 27 (2020): 15901–12. http://dx.doi.org/10.1039/d0ra01177k.

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Fenton oxidation of p-nitrophenol was accelerated 3 times using a nano-pyrite catalyst. Homogeneous Fenton rather than surface catalysis dominated the ˙OH generation. Nano-pyrite supported fast Fe2+ regeneration strengthens H2O2 utilization.
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14

Kaur, Manvir, Harmandeep Kaur, Manpreet Singh, Gagandeep Singh y Tejwant Singh Kang. "Biamphiphilic ionic liquid based aqueous microemulsions as an efficient catalytic medium for cytochrome c". Physical Chemistry Chemical Physics 23, n.º 1 (2021): 320–28. http://dx.doi.org/10.1039/d0cp04513f.

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15

Jiao, Xue, Eden E. L. Tanner, Stanislav V. Sokolov, Robert G. Palgrave, Neil P. Young y Richard G. Compton. "Understanding nanoparticle porosity via nanoimpacts and XPS: electro-oxidation of platinum nanoparticle aggregates". Physical Chemistry Chemical Physics 19, n.º 21 (2017): 13547–52. http://dx.doi.org/10.1039/c7cp01737e.

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16

Bertram, John R., Yuchen Ding y Prashant Nagpal. "Gold nanoclusters cause selective light-driven biochemical catalysis in living nano-biohybrid organisms". Nanoscale Advances 2, n.º 6 (2020): 2363–70. http://dx.doi.org/10.1039/d0na00017e.

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17

Cristino, Ana F., Inês A. S. Matias, David E. N. Bastos, Rui Galhano dos Santos, Ana P. C. Ribeiro y Luísa M. D. R. S. Martins. "Glycerol Role in Nano Oxides Synthesis and Catalysis". Catalysts 10, n.º 12 (2 de diciembre de 2020): 1406. http://dx.doi.org/10.3390/catal10121406.

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The transformation of biomass and the utilization of all the by products derived from chemical conversion of biomass resources is one of the most important challenges nowadays. The impact in society and the level of awareness that already exists inside and outside the scientific community, makes the challenge of improving conversion of biomass to commodities a hot topic. Glycerol, a by-product obtained from the biodiesel production, is a key player compound due to its chemical versatility. The possibility of being used as solvent, reagent, reducing agent (in the polyol method), and so forth, makes glycerol an extremely appealing commodity. When used within nanotechnology, namely combined with nanomaterials, its potential becomes even higher. This review summarizes the work developed by the scientific community, during the last five years, in the use of glycerol with nano oxides. The analysis goes from the simple role of solvent to the oxidation of glycerol by nano oxides.
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18

Zhang, Lingyu, Siyu Long, Huibin Jiao, Zhuoyue Liu, Ping Zhang, Aiwen Lei, Wei Gong y Xianglin Pei. "Cellulose derived Pd nano-catalyst for efficient catalysis". RSC Advances 12, n.º 29 (2022): 18676–84. http://dx.doi.org/10.1039/d2ra02799b.

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19

Suchorski, Yuri y Günther Rupprechter. "Catalysis by Imaging: From Meso- to Nano-scale". Topics in Catalysis 63, n.º 15-18 (2 de julio de 2020): 1532–44. http://dx.doi.org/10.1007/s11244-020-01302-2.

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AbstractIn-situ imaging of catalytic reactions has provided insights into reaction front propagation, pattern formation and other spatio-temporal effects for decades. Most recently, analysis of the local image intensity opened a way towards evaluation of local reaction kinetics. Herein, our recent studies of catalytic CO oxidation on Pt(hkl) and Rh(hkl) via the kinetics by imaging approach, both on the meso- and nano-scale, are reviewed. Polycrystalline Pt and Rh foils and nanotips were used as µm- and nm-sized surface structure libraries as model systems for reactions in the 10–5–10–6 mbar pressure range. Isobaric light-off and isothermal kinetic transitions were visualized in-situ at µm-resolution by photoemission electron microscopy (PEEM), and at nm-resolution by field emission microscopy (FEM) and field ion microscopy (FIM). The local reaction kinetics of individual Pt(hkl) and Rh(hkl) domains and nanofacets of Pt and Rh nanotips were deduced from the local image intensity analysis. This revealed the structure-sensitivity of CO oxidation, both in the light-off and in the kinetic bistability: for different low-index Pt surfaces, differences of up to 60 K in the critical light-off temperatures and remarkable differences in the bistability ranges of differently oriented stepped Rh surfaces were observed. To prove the spatial coherence of light-off on nanotips, proper orthogonal decomposition (POD) as a spatial correlation analysis was applied to the FIM video-data. The influence of particular configurations of steps and kinks on kinetic transitions were analysed by using the average nearest neighbour number as a common descriptor. Perspectives of nanosized surface structure libraries for future model studies are discussed.
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20

Makgwane, Peter R. y Suprakas Sinha Ray. "A Special Section on Nano-Catalysis". Journal of Nanoscience and Nanotechnology 13, n.º 7 (1 de julio de 2013): 4759–60. http://dx.doi.org/10.1166/jnn.2013.7566.

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21

Su, Dang Sheng, Siglinda Perathoner y Gabriele Centi. "Catalysis on nano-carbon materials: Going where to?" Catalysis Today 186, n.º 1 (junio de 2012): 1–6. http://dx.doi.org/10.1016/j.cattod.2012.04.002.

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22

Zhu, Tao, Yan Dong Wan, Chun Hui Zhang, Ming Han Sun, Xu Wen He, Dong Yao Xu y Xin Qian Shu. "VOCs Decomposition Using Multiple Catalysis in Non-Thermal Plasma Processing". Advanced Materials Research 152-153 (octubre de 2010): 973–77. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.973.

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A series of experiments were performed for toluene removal from a gaseous influent at normal temperature and atmospheric pressure by adsorption & non-thermal plasma strength & nano-catalysis technology. Non-thermal plasma was generated by dielectric barrier discharge. Sorbent & nano-catalyst were called combined catalyst which included MnO2/γ-Al2O3 and nano-Ba0.8Sr0.2Zr0.1Ti0.9O3 catalyst. MnO2/γ-Al2O3 has an advantage for ozone removal, while nano-Ba0.8Sr0.2Zr0.1Ti0.9O3 is a kind of good material for improving energy utilize rate. The results showed the synergistic technology resulted in greater enhancement of toluene removal efficiency and energy efficiency and a better inhibition for O3 formation in the gas exhaust. Based on data analysis of FT-IR, the experiment discussed decomposition mechanism and reaction process of toluene. The results showed that synergic effect could control byproducts effectively.
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23

Bakthavatsalam, Rangarajan, Subrata Ghosh, Ratul Kumar Biswas, Aayushi Saxena, Alagar Raja, Musthafa Ottakam Thotiyl, Sandip Wadhai, Arun G. Banpurkar y Janardan Kundu. "Solution chemistry-based nano-structuring of copper dendrites for efficient use in catalysis and superhydrophobic surfaces". RSC Advances 6, n.º 10 (2016): 8416–30. http://dx.doi.org/10.1039/c5ra22683j.

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24

Ito, Kyosuke, Hui Jang, Koji Sakashita y Sachio Asaoka. "Catalysis at the interface of nano-oxides and nanozeolites". Pure and Applied Chemistry 80, n.º 11 (1 de enero de 2008): 2273–82. http://dx.doi.org/10.1351/pac200880112273.

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The catalysts that can efficiently hydro-reform higher n-paraffin to lower isoparaffins for environmentally friendly gasoline were studied. The catalysts were examined by the conversion of n-hexadecane, n-C16H34 to i-C6H14~i-C12H26. The tri-modally nanoporous (nanometer-size) catalysts composed of (Ni-Mo)/[γ-Al2O3], nano-oxide, and nanocrystalline zeolite have some active and selective performances because of the cooperation between (Ni-Mo)/[γ-Al2O3] and the composite of nano-oxide-nanozeolite. The (Ni-Mo)/[γ-Al2O3] component holding the skeletal isomerization activity enhances the cracking activity on the composite of nanoporous (np)-Al2O3-USY (ultra-stable Y-type zeolite) to result in i-C6H14~i-C12H26 as the isomerization of n-hexadecane followed the cracking reaction. The catalyst composed of nanocrystalline BEA (beta-type zeolite) or MFI (ZSM-5-type zeolite) zeolite can be more activated with the nano-SiO2 than with the nano-Al2O3. The catalyst composed of the dealuminated zeolite, USY (SiO2/Al2O3 = 12) cannot be activated with the nano-SiO2 but with the nano-Al2O3. This activation depends on the SiO2/Al2O3 ratio of the USY. It is considered that the catalytic property of the three components is partially due to the novel active sites formed concertedly at the interface of the nano-oxides and the nanozeolites. The novel sites have a major role for the isomerization and cracking as the moderate and strong acids and are generated when Si-OH in the nanopores of the USY resulted from the dealumination catches Al-OH in the nano-Al2O3 to form Si-O-Al-O-Al-O-Si instead of Si-O-Al-O-Si-O-Si-O.
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25

Li, Zhanfeng, Jun Dong, Huixin Zhang, Yongqiang Zhang, Huiqi Wang, Xuejun Cui y Zonghua Wang. "Sonochemical catalysis as a unique strategy for the fabrication of nano-/micro-structured inorganics". Nanoscale Advances 3, n.º 1 (2021): 41–72. http://dx.doi.org/10.1039/d0na00753f.

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26

Chen, Lifu, Eden E. L. Tanner, Chuhong Lin y Richard G. Compton. "Impact electrochemistry reveals that graphene nanoplatelets catalyse the oxidation of dopamineviaadsorption". Chemical Science 9, n.º 1 (2018): 152–59. http://dx.doi.org/10.1039/c7sc03672h.

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27

Yang, Wei-Jun, Can-Cheng Guo, Zi-Yang Li y Neng-Ye Tao. "Aerobic oxidation of α-pinene catalyzed by nano-titania-supported manganese tetraphenylporphyrin". Journal of Porphyrins and Phthalocyanines 13, n.º 08n09 (agosto de 2009): 973–79. http://dx.doi.org/10.1142/s1088424609001273.

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Manganese tetraphenylporphyrin supported on nano- TiO2 has been synthesized and structurally characterized. It has been shown to have excellent catalytic activity for the aerobic oxidation of α-pinene. Experimental results showed that this much-enhanced activity could arise from possible co-catalysis between metalloporphyrin and the nano- TiO2 support. The catalyst can be reused several times with minor loss to its catalytic activity.
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28

Astruc, Didier, Abdou K. Diallo, Sylvain Gatard, Liyuan Liang, Cátia Ornelas, Victor Martinez, Denise Méry y Jaime Ruiz. "Olefin metathesis in nano-sized systems". Beilstein Journal of Organic Chemistry 7 (19 de enero de 2011): 94–103. http://dx.doi.org/10.3762/bjoc.7.13.

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The interplay between olefin metathesis and dendrimers and other nano systems is addressed in this mini review mostly based on the authors’ own contributions over the last decade. Two subjects are presented and discussed: (i) The catalysis of olefin metathesis by dendritic nano-catalysts via either covalent attachment (ROMP) or, more usefully, dendrimer encapsulation – ring closing metathesis (RCM), cross metathesis (CM), enyne metathesis reactions (EYM) – for reactions in water without a co-solvent and (ii) construction and functionalization of dendrimers by CM reactions.
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29

Nehlig, E., L. Motte y E. Guénin. "Magnetic nano-organocatalysts: impact of surface functionalization on catalytic activity". RSC Advances 5, n.º 127 (2015): 104688–94. http://dx.doi.org/10.1039/c5ra20644h.

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Nano-organocatalysts were synthesized using controlled click chemistry and studied in aldolization and Michael addition reactions. It was shown that small modifications of the nanosurface can have a drastic effect on the catalysis.
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30

Wen, Cun, Yi Liu y Franklin Tao. "Integration of surface science, nanoscience, and catalysis". Pure and Applied Chemistry 83, n.º 1 (6 de diciembre de 2010): 243–52. http://dx.doi.org/10.1351/pac-con-10-11-04.

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This article briefly reviews the development of surface science and its close relevance to nanoscience and heterogeneous catalysis. The focus of this article is to highlight the importance of nanoscale surface science for understanding heterogeneous catalysis performing at solid–gas and solid–liquid interfaces. Surface science has built a foundation for the understanding of catalysis based on the studies of well-defined single-crystal catalysts in the past several decades. Studies of catalysis on well-defined nanoparticles (NPs) significantly promoted the understanding of catalytic mechanisms to an unprecedented level in the last decade. To understand reactions performed on catalytic active sites at nano or atomic scales and thus reach the goal of catalysis by design, studies of the surface of nanocatalysts are crucial. The challenges in such studies are discussed.
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31

Meng, Tao, Zhen Zhen Huang, Xiao Qian Qian, Peng Lai Zhu y Ya Chao Yu. "Study on the Photo-Catalytic Properties of Nano-TiO2 Cementitious Materials". Advanced Materials Research 168-170 (diciembre de 2010): 1561–65. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1561.

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The photo-catalytic efficiency and durability of nano-TiO2 photo-catalytic cementitious materials for oxidizing nitrogen dioxide were investigated under simulated sunlight irradiation. The experimental results showed that the photo-catalytic efficiency increased with increase of the content of nano-TiO2. When 15wt% nano-TiO2 was added, the photo-catalytic efficiency was equal to 223% of that of standard cement. When activated carbon was used as the carrier of nano-TiO2, the photo-catalytic efficiency of cementitious nano-TiO2 could be enhanced markedly. For example, the photo-catalytic efficiency could reach to 85.7%, which was as much as 359% of that of standard cement when the contents of activated carbon and nano-TiO2 were both 10wt%. Compared with nano-TiO2 powder, the photo-catalysis durability of cementitious nano-TiO2 supported by activated carbon could be improved clearly for that activated carbon could absorb nitrogen dioxide effectively, which was favored to the photo-oxidation of nano-TiO2 on nitrogen dioxide.
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32

Liu, Juewen y Juewen Liu. "Freezing DNA for Controlling Bio/nano Interfaces and Catalysis". General Chemistry 5, n.º 4 (2019): 190008. http://dx.doi.org/10.21127/yaoyigc20190008.

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33

Zhu, JunHua, Kangjian Tang, Yingchun Ye, Xiaohong Yuan, Weimin Yang y Yi Tang. "Mesoporous nano-WOx/ZrO2: facile synthesis and improved catalysis". RSC Advances 6, n.º 86 (2016): 82537–40. http://dx.doi.org/10.1039/c6ra14951k.

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34

Freund, H. J., N. Nilius, T. Risse y S. Schauermann. "A fresh look at an old nano-technology: catalysis". Physical Chemistry Chemical Physics 16, n.º 18 (2014): 8148. http://dx.doi.org/10.1039/c3cp55231d.

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35

Polychronopoulou, Kyriaki y Maguy Abi Jaoudé. "Nano-architectural advancement of CeO2-driven catalysis via electrospinning". Surface and Coatings Technology 350 (septiembre de 2018): 245–80. http://dx.doi.org/10.1016/j.surfcoat.2018.07.014.

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36

Emam, Hossam E., Mary M. Mikhail, Samya El-Sherbiny, Khaled S. Nagy y Hanan B. Ahmed. "Metal-dependent nano-catalysis in reduction of aromatic pollutants". Environmental Science and Pollution Research 27, n.º 6 (23 de diciembre de 2019): 6459–75. http://dx.doi.org/10.1007/s11356-019-07315-z.

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37

He, Jiating, Weijie Ji, Lin Yao, Yawen Wang, Bahareh Khezri, Richard D. Webster y Hongyu Chen. "Strategy for Nano-Catalysis in a Fixed-Bed System". Advanced Materials 26, n.º 24 (9 de abril de 2014): 4151–55. http://dx.doi.org/10.1002/adma.201306157.

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38

Zhang, Yan, Xinjiang Cui, Feng Shi y Youquan Deng. "ChemInform Abstract: Nano-Gold Catalysis in Fine Chemical Synthesis". ChemInform 43, n.º 24 (21 de mayo de 2012): no. http://dx.doi.org/10.1002/chin.201224248.

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39

Ahmadian, Mahsa, Kurosh Rad-Moghadam, Arash Dehghanian y Majedeh Jafari. "A novel domino protocol for three-component synthesis of new dibenzo[e,g]indoles: flexible intramolecular charge transfers". New Journal of Chemistry 46, n.º 6 (2022): 2940–51. http://dx.doi.org/10.1039/d1nj05341h.

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New and electronically interesting 2-aryl-3-nitrodibenzo[e,g]indoles were synthesized effectively via a hitherto unreported three-component domino reaction under catalysis of a superparamagnetic nano-composite.
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40

Choi, Youngbo, Yang Sik Yun, Hongseok Park, Dae Sung Park, Danim Yun y Jongheop Yi. "A facile approach for the preparation of tunable acid nano-catalysts with a hierarchically mesoporous structure". Chem. Commun. 50, n.º 57 (2014): 7652–55. http://dx.doi.org/10.1039/c4cc01881h.

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41

Hoshino, Yu, Takaaki Miyoshi, Masahiko Nakamoto y Yoshiko Miura. "Wide-range pKa tuning of proton imprinted nanoparticles for reversible protonation of target molecules via thermal stimuli". Journal of Materials Chemistry B 5, n.º 46 (2017): 9204–10. http://dx.doi.org/10.1039/c7tb02107k.

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42

Alvarado Rupflin, Luis, Chiara Boscagli y Stephan Schunk. "Platinum Group Metal Phosphides as Efficient Catalysts in Hydroprocessing and Syngas-Related Catalysis". Catalysts 8, n.º 3 (20 de marzo de 2018): 122. http://dx.doi.org/10.3390/catal8030122.

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Platinum group metal phosphides are reviewed as catalytic materials for hydroprocessing and syngas-related catalysis. Starting from synthetic procedures leading to highly disperse nano-particular compounds, their properties in the applications are discussed and compared with relevant benchmarks, if available. Regarding their mode of action, two confronting mechanistic scenarios are presented: (i) a cooperative scenario in which catalytic sites of different functionalities are active in hydroprocessing and (ii) single site catalysis, which appears to be the relevant mode of action in syngas-related catalysis and which occurs over “frustrated” active sites.
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43

Lomic, Gizela, Erne Kis, Goran Boskovic y Radmila Marinkovic-Neducin. "Application of scanning electron microscopy in catalysis". Acta Periodica Technologica, n.º 35 (2004): 67–77. http://dx.doi.org/10.2298/apt0435067l.

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A short survey of various information obtained by scanning electron microscopy (SEM) in the investigation of heterogeneous catalysts and nano-structured materials have been presented. The capabilities of SEM analysis and its application in testing catalysts in different fields of heterogeneous catalysis are illustrated. The results encompass the proper way of catalyst preparation, the mechanism of catalyst active sites formation catalysts changes and catalyst degradation during their application in different chemical processes. Presented SEM pictures have been taken on a SEM JOEL ISM 35 over 25 years of studies in the field of heterogeneous catalysis.
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44

Cao, Xun, Chaojiang Li, Yu Lu, Bowei Zhang, Yu Wu, Qing Liu, Junsheng Wu, Jiao Teng, Weiguo Yan y Yizhong Huang. "Catalysis of Au nano-pyramids formed across the surfaces of ordered Au nano-ring arrays". Journal of Catalysis 377 (septiembre de 2019): 389–99. http://dx.doi.org/10.1016/j.jcat.2019.07.038.

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45

Rolly, Gifty Sara, Dan Meyerstein, Guy Yardeni, Ronen Bar-Ziv y Tomer Zidki. "New insights into HER catalysis: the effect of nano-silica support on catalysis by silver nanoparticles". Physical Chemistry Chemical Physics 22, n.º 11 (2020): 6401–5. http://dx.doi.org/10.1039/c9cp06820a.

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46

ROZHKOVA, E. A., I. V. ULASOV, D. H. KIM, N. M. DIMITRIJEVIC, V. NOVOSAD, S. D. BADER, M. S. LESNIAK y T. RAJH. "MULTIFUNCTIONAL NANO–BIO MATERIALS WITHIN CELLULAR MACHINERY". International Journal of Nanoscience 10, n.º 04n05 (agosto de 2011): 899–908. http://dx.doi.org/10.1142/s0219581x11009350.

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Functional nanoscale materials that possess specific physical or chemical properties can leverage energy transduction in vivo. Once these materials integrate with biomolecules they combine physical properties of inorganic material and the biorecognition capabilities of bio-organic moieties. Such nano–bio hybrids can be interfaced with living cells, the elementary functional units of life. These nano–bio systems are capable of bio-manipulation or actuation via altering intracellular biochemical pathways. Thus, nano–bio conjugates are appealing for a wide range of applications from the life sciences and nanomedicine to catalysis and clean energy production. Here we highlight recent progress in our efforts to develop smart nano–bio hybrid materials, and to study their performance within cellular machinery under application of external stimuli, such as light or magnetic fields.
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47

Thakur, Pallavi, Jamsad Mannuthodikayil, Golap Kalita, Kalyaneswar Mandal y Tharangattu N. Narayanan. "Correction: In situ surface modification of bulk or nano materials by cytochrome-c for active hydrogen evolution catalysis". Materials Chemistry Frontiers 5, n.º 5 (2021): 2470. http://dx.doi.org/10.1039/d1qm90017j.

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Correction for ‘In situ surface modification of bulk or nano materials by cytochrome-c for active hydrogen evolution catalysis’ by Pallavi Thakur et al., Mater. Chem. Front., 2021, 5, 1295–1300, DOI: 10.1039/D0QM00627K.
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48

Tang, Lin, Yu Yang, Lixian Wen, Sheng Zhang, Zhenggen Zha y Zhiyong Wang. "Supported gold-catalyzed and ammonia-promoted selective synthesis of quinazolines in aqueous media". Organic Chemistry Frontiers 2, n.º 2 (2015): 114–18. http://dx.doi.org/10.1039/c4qo00278d.

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A highly efficient and selective synthesis of 2,4-disubstituted quinazolines via a hydrogen-transfer strategy was developed under the catalysis of nano-Au/TiO2 and the assistance of nitrogen source-promotion.
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49

Li, Hao, Linsen Li y Yadong Li. "The electronic structure and geometric structure of nanoclusters as catalytic active sites". Nanotechnology Reviews 2, n.º 5 (1 de octubre de 2013): 515–28. http://dx.doi.org/10.1515/ntrev-2012-0069.

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AbstractIn the past few decades, metal nanoparticles applied in heterogeneous catalysis have attracted extensive attention. The term nanocatalysis is broadly referred to as the unique catalytic effect of this series of materials. Although considerable progress has been made in nanocatalysis, it still remains a great challenge to fully understand the nature of active sites in the nanoscale. Many concepts and models have been put forwarded to describe the properties and performances of nano- and subnanoparticles in catalysis. In this review, we propose our perspective on the active sites of heterogeneous catalysis from the aspects of electronic structure and geometric structure of nanoclusters and consider briefly how these clusters function in catalysis. The challenge in nanocatalysis research methods is also discussed.
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50

Rao, Rameshwar, C. Shilpa Chakra y K. Venkateswara Rao. "Eco-Friendly Synthesis of Silver Nanoparticles Using Carica Papaya Extract for Anti Bacterial Applications". Advanced Materials Research 629 (diciembre de 2012): 279–83. http://dx.doi.org/10.4028/www.scientific.net/amr.629.279.

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Nanobiotechnology emerged as integration of nanotechnology and biotechnology for developing bioactive, biosynthetic and eco -friendly technology for synthesis of nanomaterials. Nanostructures have great demand in areas such as chemistry, catalysis, electronics, energy, and medical applications. Metallic nano-particles are normally synthesized by wet chemical synthesis techniques using the toxic and inflammable chemicals. Present research work on preparation of silver nano-particles by green nano synthesis method and has advantages over conventional methods involving chemical agents which can cause environmental toxicity. The synthesis technique is a cost effective and environment friendly technique for green nano synthesis of silver nano-particles from varying concentrations of AgNO3 solution and extract of Carica papaya fruit of different concentrations which acts as reducing and capping agent. Characterizations has been done using UV–Vis absorption spectroscopy, XRD, particle size analyser and SEM with EDX. Antimicrobial activity was done using Escherichia coli and Pseudomonas.
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