1
|
Xia X, Zhou T, Zhang H, Cui H, Zhang F, Hayat K, Zhang X, Ho CT. Simultaneously Enhanced Formation of Pyrazines and Furans during Thermal Degradation of the Glycyl-l-glutamine Amadori Compound by Selected Exogenous Amino Acids and Appropriate Elevated Temperatures. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4346-4357. [PMID: 36880130 DOI: 10.1021/acs.jafc.3c00085] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The Amadori compound of glucose and glycyl-l-glutamine (Gly-Gln-ARP) was prepared and characterized by UPLC-MS/MS and NMR. Gly-Gln-ARP could be thermally degraded into Gly-Gln and other secondary reaction products like glycyl-l-glutamic acid and its ARP via deamidation. The thermal processing temperature exerted a tremendous influence on the flavor formation of ARP. Furans were mainly formed at 100 °C, while an elevated temperature of 120 °C facilitated the massive accumulation of α-dicarbonyl compounds through the retro-aldolization of deoxyglucosone, and then increased the formation of pyrazines. The extra-added amino acids further promoted the formation of pyrazines at 120 °C, especially Glu, Lys, and His, further increasing the total concentration of pyrazines to 457 ± 6.26, 563 ± 65.5, and 411 ± 59.2 μg/L, respectively, exceeding the pure heated control at 140 °C (296 ± 6.67 μg/L). The total concentration of furans was enhanced to (20.7 × 103) ± 8.17 μg/L by extra-added Gln. Different increasing effects were observed on the type and flavor intensity of formed pyrazines and furans from different extra-added amino acids.
Collapse
Affiliation(s)
- Xue Xia
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, P. R. China
| | - Tong Zhou
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, P. R. China
| | - Han Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, P. R. China
| | - Heping Cui
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, P. R. China
| | - Foxin Zhang
- Anhui Province Key Laboratory of Functional Compound Seasoning, Anhui Qiang Wang Flavouring Food Co., Ltd., No. 1 Shengli Road, Jieshou, Fuyang 236500, Anhui, P. R. China
| | - Khizar Hayat
- Department of Kinesiology, Nutrition, and Health, Miami University, Oxford, Ohio 45056, United States
| | - Xiaoming Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu, P. R. China
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901, United States
| |
Collapse
|
2
|
Zhang Y, Li A, Kubů M, Shamzhy M, Čejka J. Highly selective reduction of biomass-derived furfural by tailoring the microenvironment of Rh@BEA catalysts. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.09.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
3
|
Zu Y, Wang Y, Yao H, Yan L, Yin W, Gu Z. A Copper Peroxide Fenton Nanoagent-Hydrogel as an In Situ pH-Responsive Wound Dressing for Effectively Trapping and Eliminating Bacteria. ACS APPLIED BIO MATERIALS 2022; 5:1779-1793. [PMID: 35319859 DOI: 10.1021/acsabm.2c00138] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bacterial infection has been a great threat to wounds due to the abuse of antibiotics and drug resistance. Elaborately constructing an efficient antibacterial strategy for accelerated healing of bacteria-infected wounds is of great importance. Herein, we develop a transferrin-conjugated copper peroxide nanoparticle-hydrogel (denoted as CP@Tf-hy) wound dressing with no toxicity to mammalian cells at a test dosage. When exposed to an initial acidic wound environment, the CP@Tf-hy simultaneously displays in situ self-supplied H2O2 and pH-responsive release of Fenton catalytic copper ions accompanied by highly toxic hydroxyl radical (•OH) generation against antibiotic-resistant bacteria. Meanwhile, the positively charged CP@Tf-hy can efficiently trap and restrain negatively charged bacteria to the range of •OH destruction to greatly overcome its intrinsic disadvantages of short life and diffusion distance. Importantly, the CP@Tf-hy consumes the bacterial overexpressed antioxidant glutathione while boosting Fenton catalytic copper(I) ions to generate more •OH. The synergistic effects of the enhanced Fenton reaction, responsive copper ion release, and bacterial trapping can achieve high bacterial elimination efficacy (7 log reduction). In vivo investigations demonstrate that the porous CP@Tf-hy significantly promotes hemostasis, cell proliferation, and migration of the wound, consequently accelerating bacteria-infected wound healing. The safe, low-cost, and all-in-one CP@Tf-hy holds great prospects as an antibacterial dressing for rapid resistant bacteria-infected purulent wound healing.
Collapse
Affiliation(s)
- Yan Zu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100049, China
| | - Yifan Wang
- College of Pharmacy, School of Basic Medicine, Ningxia Medical University, Yinchuan, Ningxia 750004, China
| | - Huiqin Yao
- College of Pharmacy, School of Basic Medicine, Ningxia Medical University, Yinchuan, Ningxia 750004, China
| | - Liang Yan
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100049, China
| | - Wenyan Yin
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhanjun Gu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
4
|
Laourari I, Lakhdari N, Belgherbi O, Medjili C, Berkani M, Vasseghian Y, Golzadeh N, Lakhdari D. Antimicrobial and antifungal properties of NiCu-PANI/PVA quaternary nanocomposite synthesized by chemical oxidative polymerization of polyaniline. CHEMOSPHERE 2022; 291:132696. [PMID: 34718011 DOI: 10.1016/j.chemosphere.2021.132696] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/09/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Increasing antimicrobial resistance has led to use of novel technologies such as nanomaterials and nanocomposites that have shown effective antimicrobial and/or antifungal activities against several gram-positive and gram-negative bacteria. There have been limited studies on antimicrobial properties of the combined polymer nanocomposites with transitional bimetallic nanoparticles such as nickel (Ni) and copper (Cu). Thus, the main objective of this study was to synthesis, characterize and investigate the antibacterial and antifungal properties of NiCu-PANI/PVA nanocomposite. The nanocomposite films with different amount of Ni and Cu salts were synthesized by chemical oxidative polymerization of polyaniline using HCl as oxidant and PVA as a stabilizer. Optical, chemical composition, and morphological characteristics as well as thermal stability were evaluated using UV-Visible, FTIR, SEM-EDX, and TGA analyses. Antimicrobial properties were then determined using the disc diffusion assay against gram-negative bacteria (i.e., Escherichia coli ATCC 25922, Klebsiella pneumonia ATCC 700603, Proteus sp.,) and gram-positive bacteria (i.e., Staphylococcus aureus ATCC 2593). Fungal plant pathogens including Aspergillus niger and Fusarium oxysporum f. sp. pisi were also evaluated for determination of antifungal activity of NiCu-PANI/PVA films. Among the synthesized films, Ni65Cu35-PANI/PVA showed excellent antibacterial activity against all the bacteria strains examined in this study. The diameters of inhibition zones for Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 700603, Proteus sp., and Staphylococcus aureus ATCC 2593 were 23, 23, 17, and 18 mm, respectively indicating good antibacterial activities. Additionally, NiCu-PANI/PVA, particularly the films with higher Cu intake, showed better antifungal activity against Fusarium oxysporum f. sp. pisi. However, NiCu-PANI/PVA was ineffective against Aspergillus niger.
Collapse
Affiliation(s)
- Ines Laourari
- Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66, 25100, Constantine, Algeria
| | - Nadjem Lakhdari
- Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66, 25100, Constantine, Algeria.
| | - Ouafia Belgherbi
- Research Center in Industrial Technologies CRTI, P.O. Box 64, Cheraga, 16014, Algiers, Algeria
| | - Chahinaz Medjili
- Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66, 25100, Constantine, Algeria
| | - Mohammed Berkani
- Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66, 25100, Constantine, Algeria.
| | - Yasser Vasseghian
- Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran.
| | - Nasrin Golzadeh
- Science, Technology, Engineering, and Mathematics (STEM) Knowledge Translations Institute, Montreal, Quebec, Canada
| | - Delloula Lakhdari
- Research Center in Industrial Technologies CRTI, P.O. Box 64, Cheraga, 16014, Algiers, Algeria.
| |
Collapse
|
5
|
The Nature of Active Sites in the Pd/C-Catalyzed Hydrogenation/Hydrodeoxygenation of Benzaldehyde. Catalysts 2022. [DOI: 10.3390/catal12030251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hydrogenations and hydrodeoxygenations represent two of the most important reactions in the production of both bulk and fine chemicals. Despite the wide and long use of metal-based catalysts for this reaction, there is still some uncertainty with respect to the properties governing the catalyst activity. Using the hydrogenation of benzaldehyde as a model reaction, in this paper, we disclose the dominant parameters determining catalyst activity of Pd nanoparticles supported on a carbonaceous material (carbon nanoplates, GNP). In particular, several operating parameters of the catalyst synthesis were varied in order to obtain materials with differences in such physico-chemical properties as nanoparticle size, Pd oxidation state and Pd surface exposure. A linear correlation between catalyst activity and the amount of surface Pd(0) atoms was found; this dependence, maintained after catalyst recycling, pointed out the nature of the active site of the Pd/GNP catalyst represented by exposed Pd(0) species.
Collapse
|
6
|
Drews M, Büttner J, Bauer M, Ahmed J, Sahu R, Scheu C, Vierrath S, Fischer A, Biro D. Spruce Hard Carbon Anodes for Lithium‐Ion Batteries. ChemElectroChem 2021. [DOI: 10.1002/celc.202101174] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mathias Drews
- Fraunhofer Institute for Solar Energy Systems, ISE Heidenhofstraße 2 79110 Freiburg Germany
| | - Jan Büttner
- Institute for Inorganic and Analytical Chemistry University of Freiburg Albertstraße 21 79104 Freiburg Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies FIT University of Freiburg Georges-Köhler-Allee 105 79110 Freiburg Germany
- Cluster of Excellence livMatS University of Freiburg 79104 Freiburg Germany
| | - Manuel Bauer
- Fraunhofer Institute for Solar Energy Systems, ISE Heidenhofstraße 2 79110 Freiburg Germany
| | - Junaid Ahmed
- Fraunhofer Institute for Solar Energy Systems, ISE Heidenhofstraße 2 79110 Freiburg Germany
| | - Rajib Sahu
- Max Planck Institute for Iron Research Max-Planck-Straße 1 40237 Düsseldorf Germany
- Materials Analytics RWTH University of Aachen Kopernikusstraße 10 52074 Aachen Germany
| | - Christina Scheu
- Max Planck Institute for Iron Research Max-Planck-Straße 1 40237 Düsseldorf Germany
- Materials Analytics RWTH University of Aachen Kopernikusstraße 10 52074 Aachen Germany
| | - Severin Vierrath
- Freiburg Center for Interactive Materials and Bioinspired Technologies FIT University of Freiburg Georges-Köhler-Allee 105 79110 Freiburg Germany
- Electrochemical Energy Systems IMTEK - Department of Microsystems Engineering University of Freiburg Georges-Köhler-Allee 103 79110 Freiburg Germany
| | - Anna Fischer
- Institute for Inorganic and Analytical Chemistry University of Freiburg Albertstraße 21 79104 Freiburg Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies FIT University of Freiburg Georges-Köhler-Allee 105 79110 Freiburg Germany
- Cluster of Excellence livMatS University of Freiburg 79104 Freiburg Germany
- Freiburg Materials Research Center, FMF University of Freiburg Stefan-Meier-Straße 21 79104 Freiburg Germany
| | - Daniel Biro
- Fraunhofer Institute for Solar Energy Systems, ISE Heidenhofstraße 2 79110 Freiburg Germany
| |
Collapse
|
7
|
Qu Y, Zheng Z, Yu Z, Song M, Zhang Y, Zhao Y, Yu J. Chain-like PtPd nanoparticles with a long-time stability as an efficient electrocatalyst for alcohols oxidation reaction. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
8
|
Potter ME, Le Brocq JJM, Oakley AE, McShane EB, Mhembere PM, Carravetta M, Vandegehuchte BD, Raja R. Thiol Functionalised Supports for Controlled Metal Nanoparticle Formation for Improved C-C Coupling. Chem Asian J 2021; 16:3610-3614. [PMID: 34506678 DOI: 10.1002/asia.202100732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/08/2021] [Indexed: 11/07/2022]
Abstract
The myriad applications of metal nanoparticle systems have individual demands on their size, shape and electronic states, demanding novel synthetic methods to optimise these properties. Herein we report our method of exploiting strong thiol-Pd binding as a precursor for forming small, uniform Pd nanoparticles on activation. We validate our approach with a range of characterisation techniques and contrast our design strategy with an analogous wetness impregnation method, showing the drastic improvements for catalytic C-C coupling. The presence of the thiol groups offers greater control over nanoparticle formation, particularly temperature resolution on activation, potentially allowing more targeted nanoparticle formation procedures.
Collapse
Affiliation(s)
- Matthew E Potter
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| | - Joshua J M Le Brocq
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| | - Alice E Oakley
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| | - Evangeline B McShane
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| | - Panashe M Mhembere
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| | - Marina Carravetta
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| | - Bart D Vandegehuchte
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181, Seneffe, Belgium
| | - Robert Raja
- Department of Chemistry, University of Southampton, Southampton, HANTS, SO17 1BJ, UK
| |
Collapse
|
9
|
Affiliation(s)
- Linfang Lu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Shihui Zou
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Baizeng Fang
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada
| |
Collapse
|
10
|
Catalytic Transformation of Renewables (Olefin, Bio-Sourced, et al.). Catalysts 2021. [DOI: 10.3390/catal11030364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The objective of this Special Issue is to provide new diverse contributions that can demonstrate recent applications in biomass transformation using heterogeneous catalysts [...]
Collapse
|
11
|
Weng R, Lu X, Ji N, Fukuoka A, Shrotri A, Li X, Zhang R, Zhang M, Xiong J, Yu Z. Taming the butterfly effect: modulating catalyst nanostructures for better selectivity control of the catalytic hydrogenation of biomass-derived furan platform chemicals. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01708j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This minireview highlights versatile routes for catalyst nanostructure modulation for better hydrogenation selectivity control of typical biomass-derived furan platform chemicals to tame the butterfly effect on the catalytic selectivity.
Collapse
Affiliation(s)
- Rengui Weng
- Indoor Environment Engineering Research Center of Fujian Province, Fujian University of Technology, Fuzhou 350118, P.R. China
| | - Xuebin Lu
- School of Science, Tibet University, Lhasa 850000, P.R. China
| | - Na Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
| | - Atsushi Fukuoka
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Abhijit Shrotri
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Xiaoyun Li
- School of Agriculture, Sun Yat-sen University, Guangdong 510275, P.R. China
| | - Rui Zhang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, P.R. China
| | - Ming Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
| | - Jian Xiong
- School of Science, Tibet University, Lhasa 850000, P.R. China
| | - Zhihao Yu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, P.R. China
| |
Collapse
|
12
|
Janani B, Alarjani KM, Raju LL, Thomas AM, Das A, Khan SS. A potent multifunctional Ag/Co-polyvinylpyrrolidone nanocomposite for enhanced detection of Cr(III) from environmental samples and its photocatalytic and antibacterial applications. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 243:118766. [PMID: 32799187 DOI: 10.1016/j.saa.2020.118766] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
Trivalent chromium (Cr(III)) is considered to exhibit hormesis (bi-phasic dose-response) property, where low dose be beneficial and high dose shows toxic effect. The present work describe the development of a bimetallic Ag/Co-polyvinylpyrrolidone nanocomposite (Ag/Co-PVP NPs) probe to detect and quantify Cr(III) ions from aqueous samples. The hydrodynamic size and zeta potential of the particle was determined to be 29 ± 1.3 nm and -37.19 ± 2.4 mV respectively. The interaction of Cr(III) with Ag/Co-PVP probe showed drastic change in colour of NPs from dark brown to pale yellow, with corresponding blue shift, tapering width and increased peak intensity. The probe showed high specificity towards Cr(III) among the tested metal ions. A linearity was observed between various dilutions of Cr(III) ions (10 to 50 nM) and the absorbance of Ag/Co-PVP NPs at 428 nm with R2 value of 0.998. The minimum detectable limit of Cr(III) was calculated to be 0.6 nM. The influence of salinity, temperature and pH on detection was studied. The probe was found to detect Cr(III) at acidic pH effectively. Competitive metal ions did not interfere the detection of Cr(III). The water sample collected from Noyyal river was taken to estimate Cr(III) by using the prepared probe to ensure practical applicability. The sample contains 9.3 nM of Cr(III) that was cross verified with AAS analysis. Hence, it is understood that the reported probe can be used to detect Cr(III) selectively with high accuracy from aqueous samples. In addition, the particles also exhibited excellent photocatalytic activity under visible light. Ag/Co-PVP nanocomposites exhibited excellent antibacterial activity against both gram +ve (B. subtilis) and gram -ve (E. coli) bacteria.
Collapse
Affiliation(s)
- B Janani
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Khaloud Mohammed Alarjani
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Lija L Raju
- Department of Zoology, Mar Ivanios College, Nalanchira, Thiruvananthapuram, India
| | - Ajith Mesmin Thomas
- Department of Botany and Biotechnology, St Xavier's College, Thumba, Thiruvananthapuram, India
| | - Arunava Das
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - S Sudheer Khan
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
| |
Collapse
|
13
|
Warczinski L, Hu B, Eckhard T, Peng B, Muhler M, Hättig C. Anchoring of palladium nanoparticles on N-doped mesoporous carbon. Phys Chem Chem Phys 2020; 22:21317-21325. [PMID: 32935678 DOI: 10.1039/d0cp03234d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pd nanoparticles deposited on nitrogen-doped mesoporous carbon are promising catalysts for highly selective and effective catalytic hydrogenation reactions. To design and utilize these novel catalysts, it is essential to understand the effect of N doping on the metal-support interactions. A combined experimental (X-ray photoelectron spectroscopy) and computational (density functional theory) approach is used to identify preferential adsorption sites and to give detailed explanations of the corresponding metal-support interactions. Pyridinic N atoms turned out to be the preferential adsorption sites for Pd nanoparticles on nitrogen-doped mesoporous carbon, interacting through their lone pairs (LPs) with the Pd atoms via N-LP - Pd dσ and N-LP - Pd s and Pd dπ - π* charge transfer, which leads to a change in the Pd oxidation state. Our results evidence the existence of bifunctional palladium nanoparticles containing Pd0 and Pd2+ centers.
Collapse
Affiliation(s)
- Lisa Warczinski
- Chair of Theoretical Chemistry, Ruhr-University Bochum, 44780 Bochum, Germany.
| | | | | | | | | | | |
Collapse
|
14
|
Capelli S, Motta D, Evangelisti C, Dimitratos N, Prati L, Pirola C, Villa A. Effect of Carbon Support, Capping Agent Amount, and Pd NPs Size for Bio-Adipic Acid Production from Muconic Acid and Sodium Muconate. NANOMATERIALS 2020; 10:nano10030505. [PMID: 32168904 PMCID: PMC7153248 DOI: 10.3390/nano10030505] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/02/2020] [Accepted: 03/06/2020] [Indexed: 11/21/2022]
Abstract
The effect of support, stabilizing agent, and Pd nanoparticles (NPs) size was studied for sodium muconate and t,t-muconic acid hydrogenation to bio-adipic acid. Three different activated carbons (AC) were used (Norit, KB, and G60) and carbon morphology did not affect the substrate conversion, but it greatly influenced the adipic acid yield. 1% Pd/KB Darco catalyst, which has the highest surface area and Pd surface exposure, and the smallest NPs size displayed the highest activity. Furthermore, the effect of the amount of the protective agent was studied varying metal/protective agent weight ratios in the range of 1/0.00–1/1.20, using KB as the chosen support. For sodium muconate reduction 1% Pd/KB_1.2 catalyst gave the best results in terms of activity (0.73 s−1), conversion, and adipic acid yield (94.8%), while for t,t-muconic acid hydrogenation the best activity result (0.85 s−1) was obtained with 1% Pd/KB_0.0 catalyst. Correlating the results obtained from XPS and TEM analyses with catalytic results, we found that the amount of PVA (polyvinyl alcohol) influences mean Pd NPs size, Pd(0)/Pd(II) ratio, and Pd surface exposure. Pd(0)/Pd(II) ratio and Pd NPs size affected adipic acid yield and activity during sodium muconate hydrogenation, respectively, while adipic acid yield was related by exposed Pd amount during t,t-muconic acid hydrogenation. The synthesized catalysts showed higher activity than commercial 5% Pd/AC.
Collapse
Affiliation(s)
- Sofia Capelli
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milan, Italy; (L.P.); (C.P.)
- Correspondence: (S.C.); (A.V.); Tel.: +39-025-031-4365 (S.C.); +39-025-031-4361 (A.V.)
| | - Davide Motta
- School of Chemistry, Cardiff Catalysis Institute, Cardiff University, Park Place, Cardiff CF10 3AT, UK;
| | - Claudio Evangelisti
- National Council of the Research, CNR-Istituto di Chimica dei Composti Organometallici, Via G. Moruzzi 1, 20124 Pisa, Italy;
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale “Toso Montanari”, Università degli Studi di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy;
| | - Laura Prati
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milan, Italy; (L.P.); (C.P.)
| | - Carlo Pirola
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milan, Italy; (L.P.); (C.P.)
| | - Alberto Villa
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milan, Italy; (L.P.); (C.P.)
- Correspondence: (S.C.); (A.V.); Tel.: +39-025-031-4365 (S.C.); +39-025-031-4361 (A.V.)
| |
Collapse
|