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Journal articles on the topic 'Catalytic gold nanoparticles'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Nuti, Silvia, Javier Fernández-Lodeiro, Jose M. Palomo, José-Luis Capelo-Martinez, Carlos Lodeiro, and Adrián Fernández-Lodeiro. "Synthesis, Structural Analysis, and Peroxidase-Mimicking Activity of AuPt Branched Nanoparticles." Nanomaterials 14, no. 13 (2024): 1166. http://dx.doi.org/10.3390/nano14131166.

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Bimetallic nanomaterials have generated significant interest across diverse scientific disciplines, due to their unique and tunable properties arising from the synergistic combination of two distinct metallic elements. This study presents a novel approach for synthesizing branched gold–platinum nanoparticles by utilizing poly(allylamine hydrochloride) (PAH)-stabilized branched gold nanoparticles, with a localized surface plasmon resonance (LSPR) response of around 1000 nm, as a template for platinum deposition. This approach allows precise control over nanoparticle size, the LSPR band, and the

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2

Wang, Yanwei, and Michael Seidel. "Integration of 3D Hydrodynamic Focused Microreactor with Microfluidic Chemiluminescence Sensing for Online Synthesis and Catalytical Characterization of Gold Nanoparticles." Sensors 21, no. 7 (2021): 2290. http://dx.doi.org/10.3390/s21072290.

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Chemiluminescence assays have shown great advantages compared with other optical techniques. Gold nanoparticles have drawn much attention in chemiluminescence analysis systems as an enzyme-free catalyst. The catalytic activity of gold nanoparticles for chemiluminescence sensing depends on size, shape and the surface charge property, which is hard to characterize in batches. As there is no positive or negative correlation between chemiluminescence signals and sizes of gold nanoparticles, the best way to get optimal gold nanoparticles is to control the reaction conditions via online chemilumines

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3

Abkhalimov, Evgeny V., and Boris G. Ershov. "Difference in the Catalytic Activity of Atoms in the Corners and at the Edges of Gold Nanoparticles: Hydrogen Isotope Exchange Reaction." International Journal of Molecular Sciences 25, no. 22 (2024): 12022. http://dx.doi.org/10.3390/ijms252212022.

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The goal of this work is to investigate the catalytic activities of low-coordination atoms located in gold nanoparticles. Gold nanoparticles with sizes from 0.7 to 40 nm deposited on γ-Al2O3 were used as a catalyst. Synthesized gold nanoparticles and prepared catalysts were characterized by HRTEM, SEM, XRD, DLS, and UV-Vis spectroscopy. The specific activity of gold nanoparticles towards the isotope exchange reaction at 77 K was studied as a function of nanoparticle size. The catalytic activity increases significantly when the particle size is less than 3 nm. The activities of low-coordination

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4

Stolle, Heike Lisa Kerstin Stephanie, Jonas Jakobus Kluitmann, Andrea Csáki, Johann Michael Köhler, and Wolfgang Fritzsche. "Shape-Dependent Catalytic Activity of Gold and Bimetallic Nanoparticles in the Reduction of Methylene Blue by Sodium Borohydride." Catalysts 11, no. 12 (2021): 1442. http://dx.doi.org/10.3390/catal11121442.

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In this study the catalytic activity of different gold and bimetallic nanoparticle solutions towards the reduction of methylene blue by sodium borohydride as a model reaction is investigated. By utilizing differently shaped gold nanoparticles, i.e., spheres, cubes, prisms and rods as well as bimetallic gold–palladium and gold–platinum core-shell nanorods, we evaluate the effect of the catalyst surface area as available gold surface area, the shape of the nanoparticles and the impact of added secondary metals in case of bimetallic nanorods. We track the reaction by UV/Vis measurements in the ra

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Lee, You Jeong, Song-Hyun Cha, Kyoung Jin Lee, Yeong Shik Kim, Seonho Cho, and Youmie Park. "Plant Extract (Bupleurum falcatum) as a Green Factory for Biofabrication of Gold Nanoparticles." Natural Product Communications 10, no. 9 (2015): 1934578X1501000. http://dx.doi.org/10.1177/1934578x1501000927.

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This work describes a biofabrication process for gold nanoparticles in which the plant extract ( Bupleurum falcatum) is used as a reducing agent to convert gold ions to gold nanoparticles. Biofabricated gold nanoparticles with spherical shapes were observed with an average diameter of 10.5 ± 2.3 nm. The color of the gold nanoparticles was purple, with a surface plasmon resonance peak at 542 nm. The face-centered cubic structure of crystalline gold was confirmed by high-resolution X-ray diffraction patterns. The biofabricated gold nanoparticles demonstrated excellent catalytic activity towards

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6

Cui, Yanshuai, Shukai Li, Ning Yu, Xiaodong Yu, Xianbing Ji, and Longgang Wang. "Highly Biocompatible Hemoglobin-Stabilized Gold Nanoparticles for an Enhanced Catalytic Reduction of 4-Nitrophenol." Inorganics 12, no. 5 (2024): 136. http://dx.doi.org/10.3390/inorganics12050136.

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4-nitrophenol (4-NP) is a frequently encountered toxic phenolic organic pollutant in water. It is important to develop a simple method to treat 4-NP. Small and monodispersed gold nanoparticles often have good catalytic performance of 4-NP. Hemoglobin (Hb) is a kind of common and important protein in organisms. Herein, highly biocompatible bovine hemoglobin-stabilized gold nanoparticles (Aun-Hb NPs) were synthesized using hemoglobin as a biological template. Then, the size, zeta potential, and composition of Aun-Hb NPs were investigated by transmission electron microscopy, dynamic light scatter

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7

Lee, You Jeong, and Youmie Park. "Green Synthetic Nanoarchitectonics of Gold and Silver Nanoparticles Prepared Using Quercetin and Their Cytotoxicity and Catalytic Applications." Journal of Nanoscience and Nanotechnology 20, no. 5 (2020): 2781–90. http://dx.doi.org/10.1166/jnn.2020.17453.

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Quercetin is a flavonoid and is abundant in the plant kingdom. Green nanoparticles (gold and silver) were synthesized by using quercetin as a reductant via a green route for their potential nanoarchitechtonic applications. There were no toxic chemicals involved during the synthesis. The gold and silver nanoparticles exhibited surface plasmon resonance at 527 nm and 401 nm, respectively. Both nanoparticle solutions retained excellent colloidal shelf stability for 7 days and in cell culture medium. The crystal structure of the nanoparticles was observed by X-ray diffraction analysis. Field emiss

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8

Deshpande, Dipali Dinkar, Varsha Pandit, Dhananjay Gunawat, and Gauri Sanpurkar. "Nanoparticles revolution: The role of gold and chitosan in endodontics irrigation." Bioinformation 21, no. 05 (2025): 1239–44. https://doi.org/10.6026/973206300211239.

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The field of endodontic irrigation has seen nanoparticle innovations which offer improved disinfection together with better clinical treatment results. Nanoparticles composed of gold and chitosan show significant antibacterial properties as well as anti-inflammatory characteristics and biocompatibility potential. The photo thermal properties and catalytic properties are limited to gold nanoparticles whereas the natural antimicrobial capabilities and adhesive properties are limited to chitosan nanoparticles. Nanoparticles play an essential role in endodontic irrigation. However, more clinical w

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9

Dutta, Sutapa, Stefano Corni, and Giorgia Brancolini. "Molecular Dynamics Simulations of a Catalytic Multivalent Peptide–Nanoparticle Complex." International Journal of Molecular Sciences 22, no. 7 (2021): 3624. http://dx.doi.org/10.3390/ijms22073624.

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Molecular modeling of a supramolecular catalytic system is conducted resulting from the assembling between a small peptide and the surface of cationic self-assembled monolayers on gold nanoparticles, through a multiscale iterative approach including atomistic force field development, flexible docking with Brownian Dynamics and µs-long Molecular Dynamics simulations. Self-assembly is a prerequisite for the catalysis, since the catalytic peptides do not display any activity in the absence of the gold nanocluster. Atomistic simulations reveal details of the association dynamics as regulated by de

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10

Kudaibergenov, S., B. Selenova, G. A. Mun, N. Yesmurzayeva, and E. Nurgaziyeva. "Catalytic activity of poly(N-vinylpyrrolidone) protected gold nanoparticles deposited on ZnO." International Journal of Biology and Chemistry 7, no. 2 (2014): 65–68. http://dx.doi.org/10.26577/2218-7979-2014-7-2-65-68.

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11

Chang, Chia-Chen, Chie-Pein Chen, Tzu-Heng Wu, Ching-Hsu Yang, Chii-Wann Lin, and Chen-Yu Chen. "Gold Nanoparticle-Based Colorimetric Strategies for Chemical and Biological Sensing Applications." Nanomaterials 9, no. 6 (2019): 861. http://dx.doi.org/10.3390/nano9060861.

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Gold nanoparticles are popularly used in biological and chemical sensors and their applications owing to their fascinating chemical, optical, and catalytic properties. Particularly, the use of gold nanoparticles is widespread in colorimetric assays because of their simple, cost-effective fabrication, and ease of use. More importantly, the gold nanoparticle sensor response is a visual change in color, which allows easy interpretation of results. Therefore, many studies of gold nanoparticle-based colorimetric methods have been reported, and some review articles published over the past years. Mos

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Slepička, Petr, Nikola Slepičková Kasálková, Jakub Siegel, Zdeňka Kolská, and Václav Švorčík. "Methods of Gold and Silver Nanoparticles Preparation." Materials 13, no. 1 (2019): 1. http://dx.doi.org/10.3390/ma13010001.

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The versatile family of nanoparticles is considered to have a huge impact on the different fields of materials research, mostly nanoelectronics, catalytic chemistry and in study of cytocompatibility, targeted drug delivery and tissue engineering. Different approaches for nanoparticle preparation have been developed, not only based on “bottom up” and “top down” techniques, but also several procedures of effective nanoparticle modifications have been successfully used. This paper is focused on different techniques of nanoparticles’ preparation, with primary focus on metal nanoparticles. Disperga

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Li, Zi Jing, Yan Jiang, Li Da Sun, et al. "Study on Synthesis and Catalysis Application of Nano-Au/C Catalyst." Key Engineering Materials 636 (December 2014): 15–18. http://dx.doi.org/10.4028/www.scientific.net/kem.636.15.

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The size controlled colloidal gold nanoparticles were prepared by sodium citrate photochemical system. The size and morphology of the gold nanoparticles were characterized by TEM and UV-Vis spectroscopy. nanoAu/C catalysts were obtained by loading the gold nanoparticles. The catalysts were used for the catalytic oxidation reaction of glyoxal and glucose in liquid phase. The research results showed that the catalysts had higher catalytic activity, and this preparation method is successful.

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14

Mikami, Yusuke, Amarajothi Dhakshinamoorthy, Mercedes Alvaro, and Hermenegildo García. "Catalytic activity of unsupported gold nanoparticles." Catal. Sci. Technol. 3, no. 1 (2013): 58–69. http://dx.doi.org/10.1039/c2cy20068f.

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15

Thaxton, C. Shad, Nathaniel L. Rosi, and Chad A. Mirkin. "Optically and Chemically Encoded Nanoparticle Materials for DNA and Protein Detection." MRS Bulletin 30, no. 5 (2005): 376–80. http://dx.doi.org/10.1557/mrs2005.101.

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AbstractNanoscale materials are beginning to have an impact in the field of molecular diagnostics. In particular, gold nanoparticles surface-functionalized with DNA have garnered much recent interest. Due to the unusual optical and catalytic properties of gold nanoparticle labels, several distinct advantages for assay readout have been realized. This review focuses on the progress made in our group over the past seven years in the development of particle surface chemistry and ultrasensitive protein and nucleic acid assays based upon DNA-functionalized gold nanoparticles. For DNA targets, exper

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Liu, Guangyang, Meng Lu, Xiaodong Huang, Tengfei Li, and Donghui Xu. "Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening." Sensors 18, no. 12 (2018): 4166. http://dx.doi.org/10.3390/s18124166.

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Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is s

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17

Watanabe, Hideo, Masayoshi Fuji, Atsuko Tada, and Minoru Takahashi. "Electrophoretic and Electrolytic Deposition of Gold Nanoparticles on a Graphite Carbon Plate." Key Engineering Materials 412 (June 2009): 71–75. http://dx.doi.org/10.4028/www.scientific.net/kem.412.71.

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Nobel metal particles with nanometer size have attracted keen interest because of, for example, their high catalytic activity to be applied for industrial applications. In this study, nano-sized gold particles were deposited onto a graphite carbon plate by two approaches: 1) electrophoresis of colloidal gold nanoparticles, 2) electrolysis of chlorauric acid. For former case, commercially-available gold nanoparticle and anionic mercapto ligand-stabilized gold nanoparticles, synthesized by citric acid reduction of chlorauric acid, were used. Size and morphology of the gold particles deposited we

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18

Librando, Ivy L., Abdallah G. Mahmoud, Sónia A. C. Carabineiro, et al. "Heterogeneous Gold Nanoparticle-Based Catalysts for the Synthesis of Click-Derived Triazoles via the Azide-Alkyne Cycloaddition Reaction." Catalysts 12, no. 1 (2021): 45. http://dx.doi.org/10.3390/catal12010045.

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A supported gold nanoparticle-catalyzed strategy has been utilized to promote a click chemistry reaction for the synthesis of 1,2,3-triazoles via the azide-alkyne cycloaddition (AAC) reaction. While the advent of effective non-copper catalysts (i.e., Ru, Ag, Ir) has demonstrated the catalysis of the AAC reaction, additional robust catalytic systems complementary to the copper catalyzed AAC remain in high demand. Herein, Au nanoparticles supported on Al2O3, Fe2O3, TiO2 and ZnO, along with gold reference catalysts (gold on carbon and gold on titania supplied by the World Gold Council) were used

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19

Mubarik, Nadia, Gulelala Gulelala, Shahid Iqbal, et al. "Different Methods, Novel Tools towards the Synthesis of Nanoparticles and Applications in Engineering, Chemical, Physical Sciences and Technology." Scholars Bulletin 8, no. 2 (2022): 71–74. http://dx.doi.org/10.36348/sb.2022.v08i02.004.

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Nano particles have gained special attention in recent years due to their remarkable electrical, magnetic, optical, and mechanical capabilities, and they offer a variety of uses in all sectors of engineering. Gold nanoparticles, for instance, are catalytic when they are 10 nm in size, whereas nanoparticles with a short radius of curvature and angular forms have better catalytic capabilities. Co-precipitation nanoparticle production is a simple approach that results in a wide range of nanoparticle sizes. Top-down and bottom-up techniques used to create mono-dispersed spherical bismuth (Bi) NPs.

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20

Ghadamgahi, Sedigheh. "The Role of Particles and Clusters Size on the Catalytic Activity of Different Types of Gold Nanocatalysts for Benzyl Alcohol Oxidation." Journal of Nano Research 69 (August 30, 2021): 67–76. http://dx.doi.org/10.4028/www.scientific.net/jnanor.69.67.

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: In this paper, activation procedures under size effects of some gold nanoparticles (Au101, Aunaked and Aucitrate) and nanoclusters (Au8 and Au9) immobilized on powder Norit® activated carbon (abbreviated to AC) and/or Vulcan carbon (abbreviated to VC) on the catalytic activity of gold nanocatalysts were studied. The gold nanostructures were activated through the washing procedure with a base in MilliQ water or hot toluene and then followed by heating in static air (abbreviated to W+S) or under vacuum (abbreviated to W+V) at 100 °C for 3 h. The highest activity of gold nanocatalysts for benzy

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Wei, Chao, Zhenzhen Chen, Chao Hu, and Haitao Wang. "Highly active catalysts of iron-based materials with Au nanoparticles for soot oxidation." E3S Web of Conferences 136 (2019): 06029. http://dx.doi.org/10.1051/e3sconf/201913606029.

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Gold nanoparticles supported on transition metal oxide catalysts have been prepared by deposition-precipitation. Their catalytic activity with or without Au doped has been tested for soot oxidation. Au improves the catalytic activity of transition metal oxide for the oxidation of soot particles. Under the catalysis of Au/Co3O4, the initial oxidation temperature of soot is 354 ℃.

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22

Gerelbaatar, Khongorzul, Ariunzaya Tsogoo, Rentsenmyadag Dashzeveg, Ninjbadgar Tsedev, and Erdene Ochir Ganbold. "Reduction of 2,4-Dinitrophenol to 2,4-Diaminophenol Using AuNPs and AgNPs as Catalyst." Solid State Phenomena 271 (January 2018): 76–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.271.76.

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In this study, colloidal metal nanoparticles have been prepared by the wet-chemical synthesis method. Gold and silver nanoparticles with approximate sphere shape were synthesized through the citrate-reduction method. The colloidal metal nanoparticles were characterized by using UV-vis absorption spectroscopy, photon cross-correlation spectroscopy (PCCS) and transmission electron microscope (TEM). Catalytic activities of the metal nanoparticles were investigated through reduction of 2,4-dinitrophenol to 2,4-diaminophenol in the presence of NaBH4 at room temperature. Both gold and silver nanopar

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Jurkiewicz, Karolina, Michał Kamiński, Wojciech Glajcar, et al. "Paracrystalline structure of gold, silver, palladium and platinum nanoparticles." Journal of Applied Crystallography 51, no. 2 (2018): 411–19. http://dx.doi.org/10.1107/s1600576718001723.

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Metallic nanoparticles are of great importance because of their unique physical, chemical, antimicrobial, diagnostic, therapeutic, biomedical, sensing, biosensing, catalytic and optical properties. Detailed knowledge of the atomic scale structure of these materials is essential for understanding their activities and for exploiting their potential. This paper reports structural studies of silica-supported silver, gold, palladium and platinum nanoparticles using X-ray diffraction and high-resolution transmission electron microscopy. Electron microscopy observation allowed the determination of na

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24

Tzani, Marina A., Catherine Gabriel, and Ioannis N. Lykakis. "Selective Synthesis of Benzimidazoles from o-Phenylenediamine and Aldehydes Promoted by Supported Gold Nanoparticles." Nanomaterials 10, no. 12 (2020): 2405. http://dx.doi.org/10.3390/nano10122405.

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We investigated the catalytic efficacy of supported gold nanoparticles (AuNPs) towards the selective reaction between o-phenylenediamine and aldehydes that yields 2-substituted benzimidazoles. Among several supported gold nanoparticle platforms, the Au/TiO2 provides a series of 2-aryl and 2-alkyl substituted benzimidazoles at ambient conditions, in the absence of additives and in high yields, using the mixture CHCl3:MeOH in ratio 3:1 as the reaction solvent. Among the AuNPs catalysts used herein, the Au/TiO2 containing small-size nanoparticles is found to be the most active towards the present

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Han, Qiuwan, Dongyang Zhang, Jiuli Guo, Baolin Zhu, Weiping Huang та Shoumin Zhang. "Improved Catalytic Performance of Au/α-Fe2O3-Like-Worm Catalyst for Low Temperature CO Oxidation". Nanomaterials 9, № 8 (2019): 1118. http://dx.doi.org/10.3390/nano9081118.

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The gold catalysts supported on various morphologies of α-Fe2O3 in carbon monoxide (CO) oxidation reaction have been studied for many researchers. However, how to improve the catalytic activity and thermal stability for CO oxidation is still important. In this work, an unusual morphology of α-Fe2O3 was prepared by hydrothermal method and gold nanoparticles were supported using a deposition-precipitation method. Au/α-Fe2O3 catalyst exhibited great activity for CO oxidation. The crystal structure and microstructure images of α-Fe2O3 were carried out by X-ray diffraction (XRD) and scanning electr

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Siyal, Lovnish, Benu Kumar, Ranjit Kumar, and Rachana Sahney. "Synthesis of Horseradish Peroxidase-Gold Nanoparticle Conjugate through Green Route." Asian Journal of Chemistry 32, no. 5 (2020): 1243–47. http://dx.doi.org/10.14233/ajchem.2020.22608.

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Synthesis of horseradish peroxidase-gold nanoparticle conjugates (HRP-AuNPs) has been studied for the development of biofunctionalized gold nanoparticles (AuNPs) through biogenic route. Herein, horseradish peroxidase enzyme has been used to synthesize gold nanoparticles at room temperature in tricine buffer. The morphology and size distribution of HRP-AuNPs conjugates were obtained by different techniques including dynamic light scattering (DLS), UV-visible (UV-vis) spectrophotometry, scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). The enzyme activity of HRP-AuNP

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Carabineiro, Sónia A. C. "Special Issue: Gold Nanoparticles for Catalytic Applications." Applied Sciences 9, no. 14 (2019): 2890. http://dx.doi.org/10.3390/app9142890.

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Turaeva, N. "SIZE EFFECTS IN THE D-BAND MODEL OF CO OXIDATION BY GOLD NANOPARTICLES." «Узбекский физический журнал» 20, no. 4 (2018): 236–42. http://dx.doi.org/10.52304/.v20i4.98.

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The volcano-type size dependence of the extraordinary catalytic activity of gold nanoparticles in CO oxidation is discussed on the basis of combination of the d-band model, the jellium model of metal clusters and the role of Fermi level in catalytic activity. The reaction rate depends non-monotonically upon the size of nanoparticles, due to exponential dependences of adsorption of reagents and desorption of products on the differences of the Fermi level of the metal cluster and antibonding states of CO and CO2 molecules forming chemical bonds with the nanoparticle, respectively. The origin of

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Shanthi, C., T. Sumathi, R. Mayildurai, P. Kavitha, and R. Kannan. "Synthesis and applications of Au-Ag bimetal impregnated layered manganese oxide nanocomposite." Digest Journal of Nanomaterials and Biostructures 20, no. 1 (2025): 253–63. https://doi.org/10.15251/djnb.2025.201.253.

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In present study, gold and silver metal nanoparticles were prepared and pillared on the manganese oxide octahedral molecular sieve type layered material. This method helps to stabilize the metal nanoparticles and for the synergetic catalytic effect of both manganese oxide and noble metal catalyst towards catalysis. Formation of layered manganese oxide in pure form and with pillaring was confirmed by XRD. Surface topology and chemical state were studied by SEM with EDS, TEM and XPS respectively. Batch studies have been conducted to evaluate the catalytic oxidative degradation of methylene blue

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Huang, Tiefan, Guan Sheng, Priyanka Manchanda, et al. "Cyclodextrin polymer networks decorated with subnanometer metal nanoparticles for high-performance low-temperature catalysis." Science Advances 5, no. 11 (2019): eaax6976. http://dx.doi.org/10.1126/sciadv.aax6976.

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The synthesis of support materials with suitable coordination sites and confined structures for the controlled growth of ultrasmall metal nanoparticles is of great importance in heterogeneous catalysis. Here, by rational design of a cross-linked β-cyclodextrin polymer network (CPN), various metal nanoparticles (palladium, silver, platinum, gold, and rhodium) of subnanometer size (<1 nm) and narrow size distribution are formed via a mild and facile procedure. The presence of the metal coordination sites and the network structure are key to the successful synthesis and stabilization of the ul

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Cook, Elijah, Kelly Moran, Qiaxian R. Johnson, Asmaa Lakhal, and Bhanu P. S. Chauhan. "A Facile One-Pot Preparation and Catalytic Application of Tunable Silica-Coated Aqueous Gold Nanoparticles." Molecules 30, no. 6 (2025): 1355. https://doi.org/10.3390/molecules30061355.

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It is known that designer polymers can be used for the synthesis and stabilization of metallic nanoparticle systems, providing new, tailorable properties. In this work, we demonstrate the trifold utility of a designer polymer, trimethoxysilylpropyl-(polyethylenimine) (TMSP-PEI), providing reduction, stabilization, and protection in a single step. Our facile and unique synthesis affords gold nanoparticles with varying sizes and morphologies in a range of solvents without the need for additional reducing agents. The use of this substituted polymer was manipulated in terms of the metal-to-ligand

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Boruah, Jayanta S., Chayanika Devi, Upasana Hazarika, et al. "Green synthesis of gold nanoparticles using an antiepileptic plant extract: in vitro biological and photo-catalytic activities." RSC Advances 11, no. 45 (2021): 28029–41. http://dx.doi.org/10.1039/d1ra02669k.

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Wongyai, Kamonpan, Phitchayapak Wintachai, Rasimate Maungchang, and Parawee Rattanakit. "Exploration of the Antimicrobial and Catalytic Properties of Gold Nanoparticles Greenly Synthesized by Cryptolepis buchanani Roem. and Schult Extract." Journal of Nanomaterials 2020 (July 20, 2020): 1–11. http://dx.doi.org/10.1155/2020/1320274.

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A green, simple, and rapid synthesis of gold nanoparticles using plant extract, Cryptolepis buchanani Roem. and Schult, and their applications are first described in this paper. The formation of gold nanoparticles was visually observed by the appearance of a ruby red color, which was further indicated by an absorption peak at 530 nm in UV-Vis spectroscopy. Optimization of reaction parameters for the gold nanoparticles was also investigated. Various analytical techniques were employed as part of the process of characterizing the resulting gold nanoparticles. Fourier transform infrared (FTIR) an

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Liang, Chen, Jun Young Cheong, Gabriel Sitaru, et al. "Size‐Dependent Catalytic Behavior of Gold Nanoparticles." Advanced Materials Interfaces 9, no. 4 (2021): 2100867. http://dx.doi.org/10.1002/admi.202100867.

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Nagano, Kohei, Wilfred Villariza Espulgar, Hiroyuki Yoshikawa, Masato Saito, and Eiichi Tamiya. "Gold Nanoparticles' Catalytic Electrochemiluminescence for Digital Sensing." ECS Meeting Abstracts MA2020-01, no. 27 (2020): 2016. http://dx.doi.org/10.1149/ma2020-01272016mtgabs.

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Pieters, Grégory, and Leonard J. Prins. "Catalytic self-assembled monolayers on gold nanoparticles." New Journal of Chemistry 36, no. 10 (2012): 1931. http://dx.doi.org/10.1039/c2nj40424a.

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Ramírez, Jesus, Mercedes Sanaú, and Elena Fernández. "Gold(0) Nanoparticles for Selective Catalytic Diboration." Angewandte Chemie International Edition 47, no. 28 (2008): 5194–97. http://dx.doi.org/10.1002/anie.200800541.

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Ramírez, Jesus, Mercedes Sanaú, and Elena Fernández. "Gold(0) Nanoparticles for Selective Catalytic Diboration." Angewandte Chemie 120, no. 28 (2008): 5272–75. http://dx.doi.org/10.1002/ange.200800541.

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David, Melinda, Teodor A. Enache, Lucian Barbu-Tudoran, Camelia Bala, and Monica Florescu. "Biologically Synthesized Gold Nanoparticles with Enhanced Antioxidant and Catalytic Properties." Pharmaceuticals 17, no. 9 (2024): 1105. http://dx.doi.org/10.3390/ph17091105.

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Increasing levels of reactive oxygen species generate oxidative stress in the human body that can lead to various medical conditions. The use of nanomaterials exhibiting antioxidant properties may prevent these effects. The biological synthesis of metallic nanoparticles using plant extracts with antioxidant properties can offer benefits due to their active compounds. The used extracts contained reducing and stabilizing agents, which were shown to be transferred onto the gold nanoparticles, functionalizing them. Herin, we report a gold nanoparticle synthesis by eco-friendly biological methods (

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Jalani, Mohamad Azani, Leny Yuliati, Siew Ling Lee, and Hendrik Oktendy Lintang. "Highly ordered mesoporous silica film nanocomposites containing gold nanoparticles for the catalytic reduction of 4-nitrophenol." Beilstein Journal of Nanotechnology 10 (July 5, 2019): 1368–79. http://dx.doi.org/10.3762/bjnano.10.135.

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We report that transparent mesostructured silica/gold nanocomposite materials with an interpore distance of 4.1 nm, as-synthesized from a templated sol–gel synthesis method using discotic trinuclear gold(I) pyrazolate complex, were successfully utilized for the fabrication of thin film mesoporous silica nanocomposites containing gold nanoparticles. The material exhibited a highly ordered hexagonal structure when subjected to a thermal hydrogen reduction treatment at 210 °C. In contrast, when the material was subjected to calcination as a heat treatment from 190 to 450 °C, the thin film nanocom

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Zhang, Qiang, Biao Zang, and Shaozhen Wang. "Surfactant-free synthesis of porous Au by a urea complex." RSC Advances 9, no. 40 (2019): 23081–85. http://dx.doi.org/10.1039/c9ra04372a.

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Elouarzaki, Kamal, Alan Le Goff, Michael Holzinger, et al. "From gold porphyrins to gold nanoparticles: catalytic nanomaterials for glucose oxidation." Nanoscale 6, no. 15 (2014): 8556–60. http://dx.doi.org/10.1039/c4nr02015d.

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Ahmad, Aftab, Yun Wei, Fatima Syed, et al. "Size dependent catalytic activities of green synthesized gold nanoparticles and electro-catalytic oxidation of catechol on gold nanoparticles modified electrode." RSC Advances 5, no. 120 (2015): 99364–77. http://dx.doi.org/10.1039/c5ra20096b.

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Le, Van Thuan, Ngoc Nhu Quynh Ngu, Tan Phat Chau, et al. "Silver and Gold Nanoparticles from Limnophila rugosa Leaves: Biosynthesis, Characterization, and Catalytic Activity in Reduction of Nitrophenols." Journal of Nanomaterials 2021 (May 20, 2021): 1–11. http://dx.doi.org/10.1155/2021/5571663.

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This study describes a simple green method for the synthesis of Limnophila rugosa leaf-extract-capped silver and gold nanoparticles without using any expensive toxic reductant or stabilizer. The noble metal nanoparticles were characterized by Fourier transform infrared (FTIR) microscopy, powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray analysis (EDX), high-resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), and dynamic light scattering (DLS) method. It has been found that the biosynthesize

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Scurti, Stefano, Eleonora Monti, Elena Rodríguez-Aguado, Daniele Caretti, Juan Antonio Cecilia, and Nikolaos Dimitratos. "Effect of Polyvinyl Alcohol Ligands on Supported Gold Nano-Catalysts: Morphological and Kinetics Studies." Nanomaterials 11, no. 4 (2021): 879. http://dx.doi.org/10.3390/nano11040879.

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The effect of polyvinyl alcohol (PVA) stabilizers and gold nanoparticles supported on active carbon (AuNPs/AC) was investigated in this article. Polymers with different molecular weights and hydrolysis degrees have been synthesized and used, like the stabilizing agent of Au nano-catalysts obtained by the sol-immobilization method. The reduction of 4-nitrophenol with NaBH4 has been used as a model reaction to investigate the catalytic activity of synthesized Au/AC catalysts. In addition, we report several characterization techniques such as ultraviolet-visible spectroscopy (UV-Vis), dynamic lig

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Ramírez, Oscar, Matías Leal, Ximena Briones, et al. "New Hybrid Nanocomposites with Catalytic Properties Obtained by In Situ Preparation of Gold Nanoparticles on Poly (Ionic Liquid)/Poly (4-Vinylpyridine) Nanofibers." Polymers 14, no. 18 (2022): 3782. http://dx.doi.org/10.3390/polym14183782.

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In this work, we report the obtaining of new hybrid nanocomposites with catalytic activity formed by nanofibers of polymer blends and gold nanoparticles. The nanofibers were obtained by electrospinning blends of a poly (ionic liquid) (PIL) and its precursor polymer, poly (4-vinyl pyridine) (P4VPy). The characteristics of the nanofibers obtained proved to be dependent on the proportion of polymer in the blends. The nanofibers obtained were used to synthesize, in situ, gold nanoparticles on their surface by two-step procedure. Firstly, the adsorption of precursor ions on the nanofibers and then

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Sarhid, Iyad, Isabelle Lampre, Diana Dragoe, Patricia Beaunier, Bruno Palpant, and Hynd Remita. "Hexacyano Ferrate (III) Reduction by Electron Transfer Induced by Plasmonic Catalysis on Gold Nanoparticles." Materials 12, no. 18 (2019): 3012. http://dx.doi.org/10.3390/ma12183012.

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Redox reactions are of great importance in environmental catalysis. Gold nanoparticles (Au-NPs) have attracted much attention because of their catalytic activity and their localized surface plasmon resonance (LSPR). In the present study, we investigated, in detail, the reduction of ferricyanide (III) ion into a ferrocyanide (II) ion catalyzed by spherical gold nanoparticles of two different sizes, 15 nm and 30 nm, and excited at their LSPR band. Experiments were conducted in the presence (or absence) of sodium thiosulfate. This catalysis is enhanced in the presence of Au- NPs under visible lig

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Yang, Xin, Wen Jin Yang, Lian Jin Weng, Yuan Yuan Han, and Di Geng. "Syzygium Samarangense Leaf Mediated Biosynthesis of Gold Nanoparticles and its Application in Catalysis." Advanced Materials Research 399-401 (November 2011): 747–50. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.747.

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In this study, we report one-pot biological fabrication of gold nanoparticles by a facile procedure using lixivium of Syzygium samarangense leaf without extra surfactant, capping agent, and/or template. The resulting gold nanoparticles showed good performance in the catalytic reduction of 4-nitrophenol.

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Isozaki, Katsuhiro, Tomoya Taguchi, Kosuke Ishibashi, et al. "Mechanistic Study of Silane Alcoholysis Reactions with Self-Assembled Monolayer-Functionalized Gold Nanoparticle Catalysts." Catalysts 10, no. 8 (2020): 908. http://dx.doi.org/10.3390/catal10080908.

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The self-assembled monolayer (SAM)-modified metallic nanoparticles (MNPs) often exhibit improved chemoselectivity in various catalytic reactions by controlling the reactants’ orientations adsorbed in the SAM; however, there have been a few examples showing that the reaction rate, i.e., catalytic activity, is enhanced by the SAM-modification of MNP catalysts. The critical parameters that affect the catalytic activity, such as the supports, nanoparticle size, and molecular structures of the SAM components, remain uninvestigated in these sporadic literature precedents. Here, we report the mechani

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Yu, Juyoung, and Jongsung Kim. "Synthesis and Characterization of ZnO Doped with Gold Nanoparticles for Improved Photocatalytic Activity." Science of Advanced Materials 13, no. 5 (2021): 944–48. http://dx.doi.org/10.1166/sam.2021.3980.

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Recently, gold nanoparticles have been widely employed to achieve the activation of the catalytic properties of semiconductors for the decomposition of organic dyes. In this study, gold nanoparticles were prepared by Turke-vich method using HAuCl4 and trisodium citrate dehydrate. gold nanoparticles with size of 18, 20, and 22 nm were prepared by controlling the trisodium citrate dehydrate concentration and reaction time. Furthermore, ZnO nanorods were prepared using zinc nitrate hexahydrate through a hydrothermal process. Finally, ZnO doped with gold nanoparticles nanocomposite photocatalysts

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