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  1. Article ; Online: Monodisperse Ag, Au Nanoparticles via Solvated Metal Atom Dispersion and Digestive Ripening in Ionic Liquid.

    Sarkar, Saibalendu / Jagirdar, Balaji R

    Langmuir : the ACS journal of surfaces and colloids

    2024  Volume 40, Issue 14, Page(s) 7620–7631

    Abstract: Digestive ripening (DR) is a postsynthetic protocol for the transformation of a colloid consisting of polydisperse metal nanoparticles (NPs) into a colloid composed of nearly monodisperse metal nanoparticles. This process is brought about by the ... ...

    Abstract Digestive ripening (DR) is a postsynthetic protocol for the transformation of a colloid consisting of polydisperse metal nanoparticles (NPs) into a colloid composed of nearly monodisperse metal nanoparticles. This process is brought about by the digestive ripening agent, typically an organic ligand with a long alkyl chain at one end and a functional group at the other, at the boiling point of the solvent in which it is carried out, requiring long periods of time. In this work, digestive ripening of polydisperse Ag and Au nanoparticles brought about by ionic liquids (ILs) under very mild conditions (∼273 K, ∼30 min) to obtain nearly monodisperse nanoparticles has been demonstrated. Herein, the ionic liquid plays a dual role, as a digestive ripening and a stabilizing agent for the nanoparticles. Ionic liquid-assisted digestive ripening under such mild temperatures and short period of time has hitherto not been reported.
    Language English
    Publishing date 2024-03-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.4c00284
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Phase-Controlled Pd-Sn Nanostructures via Co-Digestive Ripening: Catalytic Performance for Base-Free Oxidation of Benzyl Alcohol.

    Bhatia, Geetanjali / Jagirdar, Balaji R

    Chemistry, an Asian journal

    2023  Volume 18, Issue 14, Page(s) e202300343

    Abstract: Diluting the precious metal to be used for catalysis with an abundant and non-precious metal to form alloy/intermetallic nanostructures is of great interest owing to the cost-effectiveness of the catalyst. The physicochemical properties of such ... ...

    Abstract Diluting the precious metal to be used for catalysis with an abundant and non-precious metal to form alloy/intermetallic nanostructures is of great interest owing to the cost-effectiveness of the catalyst. The physicochemical properties of such bimetallic nanostructures are influenced by the atomic ordering of different atoms in the system, generally enhancing the catalytic activity, selectivity, and durability compared to their monometallic counterparts. To understand the relationship between the structure and the activity of the catalyst, phase-controlled synthesis of alloy/intermetallic nanostructures is crucial. Easy and scalable synthesis of such nanostructures with phase control presents a true challenge. We exploited a colloidal-based synthetic route termed 'co-digestive ripening' to prepare Pd-Sn alloy/intermetallic nanostructures. Oleylamine capped Pd and Sn colloids were utilized to obtain network-like Pd
    Language English
    Publishing date 2023-06-06
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2233006-9
    ISSN 1861-471X ; 1861-4728
    ISSN (online) 1861-471X
    ISSN 1861-4728
    DOI 10.1002/asia.202300343
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  3. Article ; Online: Co-digestive ripening assisted phase-controlled synthesis of Ag-Sn intermetallic nanoparticles and their dye degradation activity.

    Bhatia, Geetanjali / Jagirdar, Balaji R

    Dalton transactions (Cambridge, England : 2003)

    2022  Volume 51, Issue 32, Page(s) 12147–12160

    Abstract: The Ag-Sn based system in the nano-size regime is one of the strongest candidates for lead-free solders. Besides, the investigation of several other applications of Ag-Sn nanostructures, especially in catalysis, remains scarce which makes it an ... ...

    Abstract The Ag-Sn based system in the nano-size regime is one of the strongest candidates for lead-free solders. Besides, the investigation of several other applications of Ag-Sn nanostructures, especially in catalysis, remains scarce which makes it an interesting system to synthesize and explore its chemistry. In this report, nearly monodisperse ε-Ag
    Language English
    Publishing date 2022-08-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d2dt01438f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Multi-functional palladium-ruthenium nanocomposites: an approach towards semi-hydrogenation catalysis and hydrogen sorption.

    Bhattacharya, Chirasmita / Netam, Kamla D / Jagirdar, Balaji R

    Physical chemistry chemical physics : PCCP

    2022  Volume 24, Issue 47, Page(s) 29043–29056

    Abstract: Development of heterogeneous metal catalysts with superior activity and high selectivity towards the semi-hydrogenation of alkynes is of significant industrial importance. Bimetallic Pd-Ru nanocomposites were synthesized over the entire composition range ...

    Abstract Development of heterogeneous metal catalysts with superior activity and high selectivity towards the semi-hydrogenation of alkynes is of significant industrial importance. Bimetallic Pd-Ru nanocomposites were synthesized over the entire composition range using a capping-agent assisted solution-based approach. The as-prepared nanocomposites demonstrated excellent catalytic activity towards the hydrogenation of a wide range of olefinic substrates and exceptional selectivity towards styrene in a phenylacetylene semi-hydrogenation reaction under mild conditions. In addition, hydrogen sorption studies were performed on the as-prepared bimetallic Pd-Ru nanomaterials, where an increase in the incorporation of Ru atoms into the bimetallic structure resulted in a decrease in the hydrogen storage capacity of the resulting material. Comprehensive structural characterization and insights obtained from the hydrogen sorption studies revealed that the presence of weakly bound hydrogen atoms in the hydride phase of the bimetallic species contributes to its excellent selectivity in hydrogenation reactions.
    Language English
    Publishing date 2022-12-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp03865j
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: H-atom site exchange in an iridium

    Agrawal, Nisha K / Gayathridevi, S / Dash, Soumya R / Vanka, Kumar / Jagirdar, Balaji R

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 39, Page(s) 13858–13863

    Abstract: Treatment ... ...

    Abstract Treatment of
    Language English
    Publishing date 2023-10-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt02366d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: A capping agent dissolution method for the synthesis of metal nanosponges and their catalytic activity towards nitroarene reduction under mild conditions.

    Ghosh, Sourav / Jagirdar, Balaji R

    Dalton transactions (Cambridge, England : 2003)

    2018  Volume 47, Issue 48, Page(s) 17401–17411

    Abstract: We report a general strategy for the synthesis of metal nanosponges (M = Ag, Au, Pt, Pd, and Cu) using a capping agent dissolution method where addition of water to the M@BNHx nanocomposite affords the metal nanosponges. The B-H bond of the BNHx polymer ... ...

    Abstract We report a general strategy for the synthesis of metal nanosponges (M = Ag, Au, Pt, Pd, and Cu) using a capping agent dissolution method where addition of water to the M@BNHx nanocomposite affords the metal nanosponges. The B-H bond of the BNHx polymer gets hydrolysed upon addition of water and produces hydrogen gas bubbles which act as dynamic templates leading to the formation of nanosponges. The rate of B-H bond hydrolysis has a direct impact on the final nanostructure of the materials. The metal nanosponges were characterized using powder XRD, electron microscopy, XPS, and BET surface area analyzer techniques. The porous structure of these nanosponges offers a large number of accessible surface sites for catalytic reactions. The catalytic activity of these metal nanosponges has been demonstrated for the reduction of 4-nitrophenol where palladium exhibits the highest catalytic activity (k = 0.314 min-1). The catalytic activity of palladium nanosponge was verified for the tandem dehydrogenation of ammonia borane and the hydrogenation of nitroarenes to arylamines in methanol at room temperature. The reduction of various substituted nitroarenes was proven to be functional group tolerant except for a few halogenated nitroarenes (X = Br and I) and >99% conversion was noted within 30-60 min with high turnover frequencies (TOF) at low catalyst loading (0.1 mol%). The catalyst could be easily separated out from the reaction mixture via centrifugation and was recyclable over several cycles, retaining its porous structure.
    Language English
    Publishing date 2018-11-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/c8dt03854f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Synthesis of mesoporous iridium nanosponge: a highly active, thermally stable and efficient olefin hydrogenation catalyst.

    Ghosh, Sourav / Jagirdar, Balaji R

    Dalton transactions (Cambridge, England : 2003)

    2017  Volume 46, Issue 34, Page(s) 11431–11439

    Abstract: Three dimensional porous structures offer high specific surface areas and large pore volumes, which enhance substrate diffusion within the porous structures and provide a large number of surface active sites. Such types of structures find applications in ...

    Abstract Three dimensional porous structures offer high specific surface areas and large pore volumes, which enhance substrate diffusion within the porous structures and provide a large number of surface active sites. Such types of structures find applications in catalysis. Herein, we report a simple synthetic strategy for the preparation of iridium nanosponges by the capping agent dissolution method. An Ir@BNH
    Language English
    Publishing date 2017-08-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/c7dt01358b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Acetylene Semi-Hydrogenation at Room Temperature over Pd-Zn Nanocatalyst.

    Tiwari, Garima / Sharma, Gunjan / Verma, Rishi / Gakhad, Pooja / Singh, Abhishek Kumar / Polshettiwar, Vivek / Jagirdar, Balaji R

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2023  Volume 29, Issue 63, Page(s) e202301932

    Abstract: A reaction of fundamental and commercial importance is acetylene semi-hydrogenation. Acetylene impurity in the ethylene feedstock used in the polyethylene industry poisons the Ziegler-Natta catalyst which adversely affects the polymer quality. Pd based ... ...

    Abstract A reaction of fundamental and commercial importance is acetylene semi-hydrogenation. Acetylene impurity in the ethylene feedstock used in the polyethylene industry poisons the Ziegler-Natta catalyst which adversely affects the polymer quality. Pd based catalysts are most often employed for converting acetylene into the main reactant, ethylene, however, it often involves a tradeoff between the conversion and the selectivity and generally requires high temperatures. In this work, bimetallic Pd-Zn nanoparticles capped by hexadecylamine (HDA) have been synthesized by co-digestive ripening of Pd and Zn nanoparticles and studied for semi-hydrogenation of acetylene. The catalyst showed a high selectivity of ~85 % towards ethylene with a high ethylene productivity to the tune of ~4341 μmol g
    Language English
    Publishing date 2023-10-04
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202301932
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  9. Article ; Online: Shape and Phase-Controlled One-Pot Synthesis of Air Stable Cationic AgCdS Nanocrystals, Optoelectronic and Electrochemical Hydrogen Evolution Studies.

    Chaturvedi, Jyotsna / Munthasir, Akkarakkaran Thayyil Muhammed / Nayak, Arpan Kumar / Tripathi, Laxmi Narayan / Thilagar, Pakkirisamy / Jagirdar, Balaji R

    Small methods

    2023  Volume 8, Issue 1, Page(s) e2300907

    Abstract: CdS-based materials are extensively studied for photocatalytic water splitting. By incorporating ... ...

    Abstract CdS-based materials are extensively studied for photocatalytic water splitting. By incorporating Ag
    Language English
    Publishing date 2023-10-17
    Publishing country Germany
    Document type Journal Article
    ISSN 2366-9608
    ISSN (online) 2366-9608
    DOI 10.1002/smtd.202300907
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  10. Article ; Online: Digestive-Ripening-Facilitated Nanoengineering of Diverse Bimetallic Nanostructures.

    Bhattacharya, Chirasmita / Arora, Neha / Jagirdar, Balaji R

    Langmuir : the ACS journal of surfaces and colloids

    2018  Volume 35, Issue 20, Page(s) 6493–6505

    Abstract: From an ingenious methodology for obtaining monodispersity, digestive ripening has advanced to become an outstanding solution-based synthesis route to realizing various bimetallic heterostructures. This feature article attempts to provide an overview of ... ...

    Abstract From an ingenious methodology for obtaining monodispersity, digestive ripening has advanced to become an outstanding solution-based synthesis route to realizing various bimetallic heterostructures. This feature article attempts to provide an overview of the various facets of the codigestive ripening process and the array of heterostructures that could be achieved by this technique. We briefly discuss the mechanism of digestive ripening in the case of monometallic elements and use that understanding to elucidate the mechanism of the less well established codigestive ripening strategy for designing bimetallic nanostructures. The systems studied by our group in the past decade for the fabrication of diverse heterostructures are highlighted in this article. The exploitation of digestive ripening to realize monodisperse bimetallic nanostructures by several other groups is also featured. In addition to digestive ripening agents, the significance of tuning various reaction parameters and its consequences on the final structure and morphology have also been discussed. Additionally, efforts based on theoretical studies to gain insight into the factors which dominate the mechanism of the digestive ripening process have also been covered. This article is a contribution to the understanding of the codigestive ripening methodology and a demonstration of its tremendous potential in achieving the desired bimetallic heteronanostructures.
    Language English
    Publishing date 2018-09-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.8b02208
    Database MEDical Literature Analysis and Retrieval System OnLINE

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