Relevant bibliographies by topics / 4-nitrophenol reduction

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  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic '4-nitrophenol reduction'

Author: Grafiati
Published: 26 June 2023
Last updated: 17 June 2025

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Journal articles on the topic "4-nitrophenol reduction"

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Serrà, Albert, Raül Artal, Maria Pozo, Jaume Garcia-Amorós, and Elvira Gómez. "Simple Environmentally-Friendly Reduction of 4-Nitrophenol." Catalysts 10, no. 4 (2020): 458. http://dx.doi.org/10.3390/catal10040458.

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The low molecular-mass organic compound 4-nitrophenol is involved in many chemical processes and is commonly present in soils and in surface and ground waters, thereby causing severe environmental impact and health risk. Several methods have been proposed for its transformation (bio and chemical degradation). However, these strategies not only produce equally or more toxic aromatic species but also require harsh operating conditions and/or time-consuming treatments. In this context, we report a comprehensive and systematic study of the electrochemical reduction of 4-nitrophenol as a viable alternative. We have explored the electrochemical reduction of this pollutant over different metallic and carbonaceous substrata. Specifically, we have focused on the use of gold and silver working electrodes since they combine a high electrocatalytic activity for 4-nitrophenol reduction and a low electrocatalytic capacity for hydrogen evolution. The influence of the pH, temperature, and applied potential have also been considered as crucial parameters in the overall optimization of the process. While acidic media and high temperatures favor the clean reduction of 4-nitrophenol to 4-aminophenol, the simultaneous hydrogen evolution is pernicious for this purpose. Herein, a simple and effective electrochemical method for the transformation of 4-nitrophenol into 4-aminophenol is proposed with virtually no undesired by-products.
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Chen, Jie, Rong Ji Dai, Bin Tong, Sheng Yuan Xiao, and Weiwei Meng. "Reduction of 4-nitrophenol catalyzed by nitroreductase." Chinese Chemical Letters 18, no. 1 (2007): 10–12. http://dx.doi.org/10.1016/j.cclet.2006.11.009.

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Konarev, A. A. "Electrochemical reduction of 4-chloro-2-nitrophenol." Russian Chemical Bulletin 72, no. 2 (2023): 500–506. http://dx.doi.org/10.1007/s11172-023-3813-4.

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Macho, Vendelín, Milan Kučera, and Milan Králik. "Carbonylative Reduction of Nitrophenols to Aminophenols." Collection of Czechoslovak Chemical Communications 60, no. 3 (1995): 514–20. http://dx.doi.org/10.1135/cccc19950514.

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Two- or three-component catalysts composed of (i) sulfur or sulfur compound (H2S, CS2, COS, Na2S), (ii) basic additive (triethylamine, CH3ONa, Na2S), and usually (iii) vanadium(V) compounds (e.g. NH4VO3) were found to catalyze efficiently the reaction of CO + H2O with isomeric nitrophenols to give the corresponding aminophenols. The reaction proceeds smoothly at 398 and 483 K and initial pressure of 7 MPa, and its rate increases from 2- to 4-nitrophenol. The selectivity to aminophenols exceeding 96 per cent was obtained at the water to nitrophenol molar ratio higher than 5. The solvents such as methanol and dioxane ensured better contact of the reactants, which was necessary for achievement of such a high selectivity. The effectiveness of the sulfur components (based on the S content) is expressed by the following sequence: S : CS2 : Na2S : H2 S : COS = 1 : 1.2 : 2.5 : 10 : 11. The reaction takes place also under the reduced CO pressure to 0.1 - 0.35 MPa. Formation of side products and mechanism of the reaction are discussed.
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Urkude, Kalyani, Sanjay R. Thakare, and Sandeep Gawande. "An energy efficient photocatalytic reduction of 4-nitrophenol." Journal of Environmental Chemical Engineering 2, no. 1 (2014): 759–64. http://dx.doi.org/10.1016/j.jece.2013.11.019.

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Roy, Anindita, Biplab Debnath, Ramkrishna Sahoo, Teresa Aditya, and Tarasankar Pal. "Micelle confined mechanistic pathway for 4-nitrophenol reduction." Journal of Colloid and Interface Science 493 (May 2017): 288–94. http://dx.doi.org/10.1016/j.jcis.2017.01.045.

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Sree, Vijaya Gopalan, Jung Inn Sohn, and Hyunsik Im. "Pre-Anodized Graphite Pencil Electrode Coated with a Poly(Thionine) Film for Simultaneous Sensing of 3-Nitrophenol and 4-Nitrophenol in Environmental Water Samples." Sensors 22, no. 3 (2022): 1151. http://dx.doi.org/10.3390/s22031151.

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A very simple, as well as sensitive and selective, sensing protocol was developed on a pre-anodized graphite pencil electrode surface coated using poly(thionine) (APGE/PTH). The poly(thionine) coated graphite pencil was then used for simultaneous sensing of 3-nitrophenol (3-NP) and 4-nitrophenol (4-NP). The poly(thionine) coated electrode exhibited an enhanced electrocatalytic property towards nitrophenol (3-NP and 4-NP) reduction. Redox peak potential and current of both nitrophenols were found well resolved and their simultaneous analysis was studied. Under optimized experimental conditions, APGE/PTH showed a long linear concentration range from 20 to 230 nM and 15 nM to 280 nM with a calculated limit of detection (LOD) of 4.5 and 4 nM and a sensitivity of 22.45 µA/nM and 27.12 µA/nM for 3-NP and 4-NP, respectively. Real sample analysis using the prepared sensor was tested with different environmental water samples and the sensors exhibited excellent recovery results in the range from 98.16 to 103.43%. Finally, the sensor exposed an promising selectivity, stability, and reproducibility towards sensing of 3-NP and 4-NP.
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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 biosynthesized silver and gold nanoparticles are nearly spherical in shape with a mean particle size distribution of 87.5 nm and 122.8 nm, respectively. XRD and SAED patterns confirmed the crystalline nanostructure of the metal nanoparticles. FTIR spectra revealed the functional groups of biomolecules presented in the extract possibly responsible for reducing metallic ions and stabilizing formed nanoparticles. The biosynthesized metal nanoparticles have potential application in catalysis. Compared to previous reports, Limnophila rugosa leaf-extract-capped silver and gold nanoparticles exhibited a good catalytic activity in the reduction of several derivatives of nitrophenols including 1,4-dinitrobenzene, 2-nitrophenol, 3-nitrophenol, and 4-nitrophenol.
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Zhang, Qi, Xinfei Fan, Hua Wang, Shuo Chen, and Xie Quan. "Fabrication of Au/CNT hollow fiber membrane for 4-nitrophenol reduction." RSC Advances 6, no. 47 (2016): 41114–21. http://dx.doi.org/10.1039/c6ra07705f.

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Yudha S, Salprima, Aswin Falahudin, Risky Hadi Wibowo, John Hendri, and Dennie Oktrin Wicaksono. "Reduction of 4-nitrophenol Mediated by Silver Nanoparticles Synthesized using Aqueous Leaf Extract of Peronema canescens." Bulletin of Chemical Reaction Engineering & Catalysis 16, no. 2 (2021): 253–59. http://dx.doi.org/10.9767/bcrec.16.2.10426.253-259.

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In this study, we developed an alternative of 4-nitrophenol reduction mediated by silver nanoparticles (AgNPs) which was synthesized using aqueous extract of the Peronema canescens leaf through an eco-friendly approach. The reducing 4-nitrophenol to 4-aminophenol mediated by AgNPS in the presence of sodium borohydride as a hydrogen source proceeded rapidly at room temperature without any additional treatments. The AgNPS synthesis was simple and was carried out under mild conditions. Ultraviolet–visible spectroscopy was performed to examine the properties of the obtained AgNPs, which displayed an absorption peak at 431 nm. A transmission electron microscopy analysis revealed that the AgNPs were spherical in shape and had an average particle size of 19 nm as determined by particle size analysis. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Dissertations / Theses on the topic "4-nitrophenol reduction"

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Kwon, Beatsam. "Catalytic reduction of organic pollutants using supported metal nanoparticles." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23190/.

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Metal nanoparticle catalysts have in the last decades been extensively researched for their enhanced performance compared to their bulk counterpart. Properties of nanoparticles can be controlled by modifying their size and shape as well as adding a support and stabilizing agent. In this study, preformed colloidal gold nanoparticles supported on activated carbon were tested on the reduction of 4-nitrophenol by NaBH4, a model reaction for evaluating catalytic activity of metal nanoparticles and one with high significance in the remediation of industrial wastewaters. Methods of wastewater remediation are reviewed, with case studies from literature on two major reactions, ozonation and reduction, displaying the synergistic effects observed with bimetallic and trimetallic catalysts, as well as the effects of differences in metal and support. Several methods of preparation of nanoparticles are discussed, in particular, the sol immobilization technique, which was used to prepare the supported nanoparticles in this study. Different characterization techniques used in this study to evaluate the materials and spectroscopic techniques to analyze catalytic activities of the catalyst are reviewed: ultraviolet-visible (UV-Vis) spectroscopy, dynamic light scattering (DLS) analysis, X-ray diffraction (XRD) analysis and transmission electron microscopy (TEM) imaging. Optimization of catalytic parameters was carried out through modifications in the reaction setup. The effects of the molar ratio of reactants, stirring, type and amount of stabilizing agent are explored. Another important factor of an effective catalyst is its reusability and long-term stability, which was examined with suggestions for further studies. Lastly, a biochar support was newly tested for its potential as a replacement for activated carbon.
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Iben, Ayad Anas. "Développement de nanocatalyse en flux continu : scale-up de la valorisation de la biomasse." Electronic Thesis or Diss., Compiègne, 2021. http://www.theses.fr/2021COMP2655.

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Les objectifs de ce travail de thèse étaient le développement de nouvelles Pd NPs (nanocatalyseurs) par des méthodes vertes et leur application en flux continu à la valorisation de dérivés de la biomasse. Nous avons d'abord développé la synthèse de nanocatalyseurs constitués de NPs de Pd, qui sont stabilisés avec des ligands oxygénés, la famille de l'acide hydroxyl méthylène bisphosphonique (HMBP). Ces molécules nous ont permis de maintenir les solutions de NPs de Pd stables dans l'eau et sous conditions aérobies à 4 °C pendant une période de temps supérieure à 6 mois après leur préparation sans aucune perte d'activité catalytique. Ces solutions de Pd NPs ont pu catalyser jusqu'à 6 réactions organiques différentes en milieu aqueux dans des conditions bénignes, comme la réduction du 4-nitrophénol. Les NPs de Pd présentent une efficacité catalytique élevée pour la réduction catalytique du 4-nitrophénol en utilisant du borohydrure de sodium comme réducteur, contrairement à de nombreux catalyseurs mNP différents. La cinétique complète de la procédure de réduction a été examinée en changeant un facteur particulier à chaque fois, comme la quantité de Pd NPs, la concentration de NaBH4 et le 4-nitrophénol initial dans plusieurs circonstances expérimentales. L'évaluation du contrôle de la diffusion a été montrée par le comptage des secondes Nombre de Damköhler. Les valeurs théoriques obtenues à partir de l'équation de Langmuir-Hinshelwood ont été ajustées avec succès aux données expérimentales. Le présent travail de thèse a évalué une approche alternative pour maximiser l'accessibilité des sites catalytiques et empêcher la lixiviation de Pd par l'utilisation de NPs de Pd non supportées dans un microréacteur. Cette étude a été réalisée en utilisant différentes configurations de microréacteurs tels que le microréacteur capillaire en spirale PTFE (SCM) et leurs applications sur le modèle de réaction de référence de la réduction du 4-nitrophénol. Brièvement, en termes de synthèse de furfuryl éthyl éther, nous avons testé différents catalyseurs hétérogènes en réacteur à flux continu. L'éthérification réductrice du furfural a été effectuée sur divers métaux supportés sur du charbon actif. En raison de la meilleure sélectivité de l'éther furfurylique éthylique, le catalyseur Pd/C commercial qui contient des NP de Pd a été choisi. Nous avons utilisé un réacteur à lit fixe commercial (H-cub) sur un catalyseur Pd/C commercial contenant des NP de Pd. Le catalyseur Pd/C a été conservé dans une cartouche qui est placée dans le module de réacteur, à travers laquelle le solvant avec les réactifs est passé. Dans toutes les études, les processus d'optimisation se sont concentrés sur plusieurs points clés tels que la température, le pourcentage d'acide TFA et les catalyseurs Pd/C. Indépendamment des résultats prometteurs et des avantages de l'étude, de nombreuses possibilités peuvent être recommandées pour poursuivre le travail commencé dans cette thèse. Ainsi, des recherches supplémentaires peuvent être effectuées pour découvrir des nanocatalyseurs alternatifs, idéalement hétérogènes lors de l'utilisation d'un flux continu<br>The objectives of this PhD work were the development of new Pd NPs (nanocatalysts) by green methods and their application on continuous flow to valorisation of biomass derivatives. We first developed the synthesis of nanocatalysts made up of Pd NPs, which are stabilized with oxygen-based ligands, the family of hydroxyl methylene bisphosphonic acid (HMBP). These molecules have enabled us to keep the solutions of Pd NPs stable in water and under aerobic conditions at 4 oc for a period of time more than 6 months after their preparation without any loss in catalytic activity. These solutions of Pd NPs were able to catalyse up to 6 different organic reactions in an aqueous medium under benign conditions, such as the reduction of 4-nitrophenol. The Pd NPs, show high catalytic efficiency for catalytic reduction of 4-nitrophenol by utilizing sodium borohydride as the reducer in contrast to numerous different mNPs catalysts. The complete kinetics of the reduction procedure has been examined by changing a particular factor each time, as the quantity of Pd NPs, NaBH4 concentration, and initial 4-nitrophenol at several experimental circumstances. The assessment of diffusion control was shown by the counting of second Damköhler number. The theoretical values obtained from the Langmuir-Hinshelwood equation were successfully fitted to the experimental data. The present thesis work evaluated an alternative approach to maximize the accessibility of catalytic sites and prevent Pd leaching by the use of unsupported Pd NPs in a microreactor. This study was done by using different microreactors configurations such as PTFE spiral capillary microreactor (SCM) and their applications on the benchmark reaction model of 4-nitrophenol reduction. Briefly, in terms of furfuryl ethyl ether synthesis, we tested different heterogeneous catalysts in continuous flow reactor. The reductive etherification of furfural was done over various metals supported on activated carbon. Due to the best furfuryl ethyl ether selectively, the commercial Pd/C catalyst that contains NPs of Pd was the chosen one. we used a commercial packed-bed reactor (H-cub) over a commercial Pd/C catalyst that contains NPs of Pd. The PUC catalyst was kept in a cartridge that is placed in the reactor module, through which the solvent with reagents is passed. In all studies, the optimization processes was focused on several key points such as temperature, percentage of TFA acid and Pd/C catalysts. Regardless of the study's promising results and advantages, numerous possibilities can be recommended to proceed with the work commenced in this PhD. Thus, additional research can be done to discover alternative nanocatal Sts, ideall hetero eneous ones when utilizin continuous flow
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Yeh, Yu-Lun, and 葉佑倫. "Nitrogen CNTs-Pt nanoparticles for Catalytic Reduction of 4-Nitrophenol (4-NP)." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/tb5k65.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>106<br>Heteroatom doping carbon materials can endow many properties. The improved features can be widely applied in different field. In this thesis, we follows our laboratory has previously developed an effective method to doping boron and nitrogen into the carbon nanotubes under atmospheric pressure, by controlling the temperature to achieve different levels of nitrogen content, and deposit the metal nanoparticles with high specific surface area and high activity on the tubes. The formation of nanocomposite as a catalyst to apply the reduction reaction of 4-nitrophenol(4-NP) to reduce the energy barrier of reaction. Because of synergy effect between the carbon materials and the metal nanoparticles can effectively and fast solve the problem of phenol pollution in waste water. This thesis is divided into the following parts, the Chapter 1 introduction of nanocomposite materials and the introduction of 4-NP reduction reaction and literature review, including the motivation, the experimental set up, the choice of synthesis methods, the improvement of the properties, the kinetics of the 4-NP; Chapter 2 are synthesis of nanocomposites, experimental procedures for the 4-NP reduction, and various instruments. In the Chapter 3, the analysis results of nanocomposite were analyzed by various instruments to obtain features such as morphology, size distribution, conductivity, etc., and this parts were extended to the Chapter 4; the performance of the various catalyst for the 4-NP reduction reaction. And the effect of the concentration of reactants and reducing agents; the final discussion of the application of nanocomposite in the reduction of phenols and the comparison of activity with references will be presented in Chapter 5.
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Lin, Ting Yi, and 林庭伊. "Synthesis of Fe3O4−Au nanocomposites and Application in 4-Nitrophenol Catalytic Reduction Reaction." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/72035744301585256462.

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碩士<br>東海大學<br>化學系<br>99<br>There is great interest in the development of nanoparticles that combine multiple function or properties not obtainable in individual materials. Fe3O4 nanoparticles were initially prepared by co-precipitation method, and with the average diameter around 7 nm. And subsequently immobilization of Au seeds onto the Fe3O4 nanoparticles. The nanoparticle loading needs prevent aggregation. The surface of the Fe3O4 particles was modified with organosilane molecules to generate an amine terminated surface. Therefore Au can be immobilization by N−Au bonding. The as-prepared Fe3O4−Au nanocomposites that can combine with magnetic and catalytic properties in a single nanostructure. The effectiveness of the Fe3O4−Au nanocomposites as a solid phase heterogeneous catalyst has been evaluated on the well-known 4−Nitrophenol (4−NP) reduction to 4−Aminophenol (4−AP) in the presence of excess borohydride. It was observed that the rate constant, k, of the reaction increases with the increase in catalyst loading and catalyst dose, while decreases as the particle size increase. Moreover magnetic properties can be easily observed with isolated by an exterior magnet, which also showed magnetic recoverable catalytic activity for the reduction of 4−Nitrophenol with NaBH4. The catalyst efficiency was examined on the basis of turnover frequency (TOF) and recyclability. The as-prepared Fe3O4−Au nanocomposites are very efficient, stable, easy to prepare, eco-friendly, and cost-effective, and they have the potential for industrial applications.
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LAI, YI-HUSAN, and 賴宜璇. "Electroactive Polyamide Doped with Gold and Silver Applied to Catalytic Reduction of 4-Nitrophenol." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5s9nfh.

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碩士<br>弘光科技大學<br>化妝品應用研究所<br>106<br>Nitro-aromatics are the most common substance of the wastewater produced by farmers and industry. Among them, 4-nitrophenol tends to remain in the soil and water sources due to environmental stability and is not easily eliminated, and its toxicity can injure the central nervous system of a human and lead to neuropathy. Therefore, detecting and eliminating 4-nitrophenol has become an important work. There are some studies have researched biodegradable or adsorption method to eliminate 4-nitrophenol. In this study, the electroactive polymer - electroactive polyamide based on aniline oligomer was synthesis. And it's adsorption of gold and silver nanoparticles can increase its ability to conduct electrons, to perform as a catalyst and catalysis reduction of 4-nitrophenol. The structure and morphology of the samples were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and High Resolution X-ray Diffractometer (HRXRD). Ultraviolet–Visible spectroscopy (UV-Vis) observed electroactive polyamine composite catalytic reduction of 4-nitrophenol process. The results showed that the electroactive polyamide composite could catalyze the reduction of 4-nitrophenol, the electroactive polyamide-silver nanoparticles composite catalysis time was 3 minutes, and the electroactive polyamide-gold nanoparticles composite catalysis time was 7 minutes.
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Hsia, Nu-An, and 夏汝安. "Synthesis of Ag/Ni Alloy Nanoparticles Confined in Carboxylic Acid Functionalized Cubic SBA-1 Mesoporous Silica Nanoparticle as Efficient Catalysts for Reduction of 4-Nitrophenol and Degradation Reactions." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ymkq4n.

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碩士<br>國立中央大學<br>化學學系<br>105<br>Silver nanoparticles (Ag NPs) with a particle size about 3 nm are successfully confined within the cage-type mesopores of cubic SBA-1 mesoporous silica nanoparticles (MSNs) functionalized with carboxylic acid (-COOH) groups (CS-1B-x). Under alkaline condition of pH 9, the –COOH groups deprotonate and become -COO- groups, and thus can effectively interact with the Ag+ ions and allow facile fabrication of Ag NPs. We also used Ag+ and Ni2+ to synthesis Ag/Ni alloy incorporated in CS-1B-10. The materials were characterized by powder X-ray diffraction (XRD), solid-state 13C and 29Si MAS NMR spectroscopy, nitrogen adsorption-desorption measurements, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). In the first project, the catalytic activity of these Ag NPs based SBA-1 materials were tested for reduction of 4-nitrophenol. As the catalyst for the reduction of 4-NP, the Ag-0.3-CS-1B-10 exhibit a very high catalytic activity with the activity parameter of 120 ( s-1 g-1 cat.), and Ag06Ni04-CS-1B-10 is 150 ( s-1 g-1 cat.). Then we further used Ag/Ni alloy incorporated in CS-1B-10 for dye degradation. The degradation of methyl orange and rhodamine b follows the pseudo first order kinetics. As the catalyst for the degradation of methyl orange, Ag06Ni04-CS-1B-10 exhibits a good catalytic activity with the activity parameter of 345.0 ( s-1 g-1 cat.), also processing rhodamine b degradation by using Ag08Ni02-CS-1B-10, the activity parameter is 135.0 ( s-1 g-1 cat.). This remarkable catalytic activity for the reduction of 4-nitrophenol and degradation of methyl orange/rhodamine b can be attributed to the ultra-small Ag/Ni NPs confined in cage-type mesopores of SBA-1 MSNs, which have the particle size around 500 nm.
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You, Jiun-Guo, and 游俊國. "(1)Platnium Nanoparticles as Oxidase and Peroxidase Mimic and Their Application in Heparin Sensing；(2) Role of Poly(diallyldimethylammonium chloride) in the Catalytic Reduction of 4-Nitrophenol by Metal Nanoparticle." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/u6j6ks.

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碩士<br>國立中山大學<br>化學系研究所<br>103<br>(a) Platnium Nanoparticles as Oxidase and Peroxidase Mimic and Their Application in Heparin Sensing In our first study, the Pt-NPs were synthesized using an one-pot method and were used to catalyze 2,2&apos;&apos;-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS), 3,3&apos;&apos;,5,5&apos;&apos;-Tetramethylbenzidine (TMB), and dopamine under oxygen. The size of Pt- NPs are approximately 6±1 nm. By using TMB as substrate, the Km and Vmax were obtained 0.9 mM and 0.0042 μM/s, respectively. In order to investigative the process of electrons transfer and whether oxygen is the medium for catalytic reaction on Pt-nanoparticles based system, rotating ring disk electrode and cyclic voltammetry were perform. The results prove that under aerobic conditions, Pt-NPs have highly catalytic activity for TMB, ABTS, and dopamine of redox reaction which occur via four electrons transfer. Therefore, we suggest that Citrate-Pt NPs have the properties of oxidase. We further apply Pt-NPs cooperated with potamine as probe to detect Heparin via the decreased absorbance of TMB which is due to absorption of heparin and potamine linking in Pt-NPs, resulting in the decreased catalytic activity of Pt-NPs for TMB. Linear range is between 1 and 10 nM, detection limit is 0.3 nM. This promising method is successfully applied in detecting Heparin in human serum. Finally, we prove that Citrate-Pt NPs have the properties of peroxidase via the catalytic reaction of TMB, ABTS, and dopamine when hydrogen peroxide exist. (b) Role of Poly(diallyldimethylammonium chloride) in the Catalytic Reduction of 4-Nitrophenol by Metal Nanoparticle Nitroaromatic compounds are widely used in the manufacture of pharmaceuticals、dyes、plasticides、pesticides and explsives, they are dangerous and toxicity for environment. 4-Nitrophenol belong to aromatic nitro-compounds. Due to the stability, 4-Nitrophenol is considered as priority pollutant by EPA. Therefore, it is necessary to develop technology for 4-Nitrophenol in water. In our second study, Au, Pt, Pd NPs were synthesized using PDDA or citric acid. According to the TEM, the size of nanoparticles synthesized by PDDA or citric acid are almost the same. Further, these nanoparticles cooperated with NaBH4 to reduce 4-Nitrophenol and generate 4-Aminophenol. The results reveal that the reaction rates of Au、Pt、Pd NPs synthesized by PDDA were 0.6 min-1、1.8 min-1、3.4 min-1, respectively. Comparatively, the reaction rates of Au、Pt、Pd NPs synthesized by citric acid were 0.1 min-1、0.03 min-1、0.6 min-1, respectively. The catalytic efficiency using Au、Pt、Pd NPs synthesized by PDDA are better than using Au、Pt、Pd NPs synthesized by citric acid. The likely reason is that the positive surface of metal nanoparticles which occurs through electron-transfer processes from metal nanoparticles to PDDA. The positive surface of metal nanoparticles are easier to absorb NaBH4 and 4-Nitrophenolate which is generated by 4-Nitrophenol under alkaline environment. This technology is fast and we can further apply metal nanoparticles synthesized by PDDA for reduction of aromatic nitro-compounds.
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Zong-Han-Shen and 沈宗翰. "Development of Pt-alloy/CMK-8 Composite Catalyst and its Application for 4-NP(4-nitropheno, 4-NP) Reduction." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/2zyzyy.

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碩士<br>國立勤益科技大學<br>化工與材料工程系<br>106<br>KIT-6 was synthesized by hydrothermal method to synthesize KIT-6 with different pore sizes by changing the temperature. However, the specific surface area decreased with the increase of temperature. The ordered mesoporous carbon CMK-8 was replicated by KIT6-40°as a template. The surface area was 1155 m2/g, and the platinum precursor was prepared in the pore cavity of CMK-8 by impregnation. It is applied to the reduction of p-nitrophenol (4-nitrophenol, 4-NP) to p-aminophenol (4-aminophenol, 4-AP), and the effects of the addition of different materials (Ag, SnO2) on the catalytic reduction performance of Pt/CMK-8 catalysts, and through specific surface area analyzer (BET), scanning electron microscope (FE-SEM), field emission penetrating electron display The structure and properties of nanocomposite catalysts were analyzed by micromirror (HR-TEM), high analytical X light diffraction (XRD) and X ray photoelectron spectroscopy (XPS). The relationship between the reaction process and time of the reduction of p-nitrophenol (1mM) with p-nitrophenol (1mM) was monitored by ultraviolet light / light spectrometer (UV-vis). The study showed that PtH/CMK-8 It takes only 4 minutes to complete the whole reaction process. PtB/CMK-8 (borohydride reduction method) and PtH/CMK-8 (hydrogen reduction method) are named respectively by different reduction methods, in which the particle size of platinum particles synthesized by PtH/CMK-8 (hydrogen reduction method) is the smallest and no agglomeration occurs. In order to reduce the use of platinum, the amount of silver (Ag) metal is mixed,the more the proportion of silver, the rate of reduction is accelerated.. If the metal oxide (SnO2) is used, the excess SnO2 reunion in Pt5Sn15 causes a reduction in the catalytic activity of the platinum catalyst, resulting in the reduction of the reduction reaction in 10 minutes. The ratio of Pt5Ag15 is added to different types of mesoporous carbon (CMK-3, CMK-5, CMK-9),and the catalytic effect is very stable and Pt5Ag15/CMK-3 takes 30 seconds. The reduction reaction can be completed. The reduction reaction can be completed. According to the reduction reaction time of different catalysts, it can be concluded that Pt5Ag15/CMK-3>Pt5Ag15/CMK-8>Pt5Ag15/CMK-5>Pt5Ag15/CMK-9>Pt10Ag10/CMK-8>Pt15Ag5/CMK-8>Pt15Sn5/CMK-8>Pt/CMK-8>Pt10Sn10/CMK-8=Ag/CMK-8>Au/CMK-8>Pt5Sn15/CMK-8.
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Book chapters on the topic "4-nitrophenol reduction"

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Noh, Jihyang, and Reinout Meijboom. "Reduction of 4-Nitrophenol as a Model Reaction for Nanocatalysis." In Application of Nanotechnology in Water Research. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118939314.ch13.

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Deka, Pangkita, Debajyoti Bhattacharjee, Pingal Sarmah, Ramesh C. Deka, and Pankaj Bharali. "Catalytic Reduction of Water Contaminant ‘4-Nitrophenol’ over Manganese Oxide Supported Ni Nanoparticles." In Trends in Asian Water Environmental Science and Technology. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39259-2_3.

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Zhang, Peina, Tao Liu, Xinyuan He, Shengnan Wang, Hao Kong, and Mingfei Li. "Synthesis of magnetic Pt/Fe3O4 nanomaterials as excellent nanocatalyst for ultrafast recyclable reduction of 4-nitrophenol." In Advances in Civil Engineering and Environmental Engineering, Volume 2. CRC Press, 2023. http://dx.doi.org/10.1201/9781003383031-77.

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Raza, Waseem. "Catalytic reduction of 4-nitrophenol to 4-aminphenol in water using metal nanoparticles." In Sustainable Materials and Green Processing for Energy Conversion. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-12-822838-8.00009-0.

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R. Waghmode, Samadhan, Amol A. Dudhane, and Vaibhav P. Mhaindarkar. "Syzygium cumini Mediated Green Synthesis of Silver Nanoparticles for Reduction of 4-Nitrophenol and Assessment of its Antibacterial Activity." In Noble Metals and Intermetallic Compounds - Recent Advanced Studies and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98473.

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The biosynthesis of silver nanoparticles (AgNPs) has become more significant in the recent years owing to its applications in catalysis, imaging, drug delivery, nano-device fabrication and in medicine. We propose the synthesis of silver nanoparticles from the plant extract of Syzygium cumini and evaluation of its antibacterial and chemocatalytic potential. Synthesis of AgNPs carried out by using aqueous silver nitrate. The UV–Vis absorption spectrum of the synthesized AgNPs showed a broad absorption peak at 470 nm. TEM analysis shows the morphology of AgNPs as a hexagonal matrix with average particle size is about 50 nm. XRD analysis displays the crystalline structure of AgNPs. The presence of elemental silver was confirmed with EDX analysis. FTIR analysis shows that amide groups present in proteins are dominant reducing agents and play an important role in the bioreduction of Ag+ ions to Ag0. The bioreduced AgNPs demonstrated significant catalytic properties in a reduction reaction of 4-nitrophenol to 4-aminophenol using NaBH4 in an aqueous condition. The biosynthesized AgNPs have potent antibacterial activity against common clinical pathogens. Considering the remarkable antibacterial activity against common pathogenic microorganisms, AgNPs can be used in the pharmaceutical industries.
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Conference papers on the topic "4-nitrophenol reduction"

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Radoń, Adrian, Rafał Babilas, and Dariusz Łukowiec. "Reduction of Methylene Blue, Methyl Orange and 4-Nitrophenol Using Ag Nanoparticles." In The 4th World Congress on Recent Advances in Nanotechnology. Avestia Publishing, 2019. http://dx.doi.org/10.11159/icnnfc19.130.

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Herbani, Yuliati, Affi N. Hidayah, Kirana Y. Putri, Nurfina Yudasari, Awalina, and Tjandra Chrismadha. "Photochemical synthesis of luminescent gold nanoclusters for catalytic reduction of 4-nitrophenol." In THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL AND TECHNOLOGY (ICAMT) 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0106549.

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Subalakshmi, K., K. Ashok Kumar, and J. Senthilselvan. "Reduction of 4-Nitrophenol using electrocatalytic ZnS nanoparticles for counter electrode application in dye-sensitized solar cells." In DAE SOLID STATE PHYSICS SYMPOSIUM 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4980681.

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Chou, Chih Wei, and Hui-Hsuan Hsieh. "Synthesis of nature polymer supported Au, Ag and Au-Ag nanoparticles in aqueous medium and catalytic activity towards 4-nitrophenol reduction." In 2011 IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2011. http://dx.doi.org/10.1109/nems.2011.6017520.

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Abdillah, Purnomo, and Yoki Yulizar. "Green Synthesis of Porous Fe2O3/Au Nanocomposite with Chitosan Template using Gliricidia Sepium Leaf Aqueous Extract and its Catalytic Activity for the Reduction of 4 Nitrophenols." In Proceedings of The 6th Asia-Pacific Education And Science Conference, AECon 2020, 19-20 December 2020, Purwokerto, Indonesia. EAI, 2021. http://dx.doi.org/10.4108/eai.19-12-2020.2309172.

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