Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation

Ponjavić, Marijana; Stevanović, Sanja; Nikodinović‐Runić, Jasmina; Jeremić, Sanja; Ćosović, Vladan; Maksimović, Vesna

doi:10.1016/j.ijbiomac.2022.10.278

Cited by 7 publications

(4 citation statements)

References 75 publications

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“…Pt-based catalysts were successfully synthesized based on the results obtained. As a result of electrocatalytic testing, it was found that Pt/BNC catalyst exhibits high electrocatalytic performance in methanol oxidation with promising application as fuel cells [94] . In a previous review, cellulose-derived nanostructures (CNS) or carbonized-CNS based materials have been demonstrated to be effective in the development of sustainable energy storage devices.…”

Section: Bnc For Energy Storagementioning

confidence: 99%

Bacterial nanocellulose-Robust preparation and application—A literature review

Thirumalai,

Girigoswami,

Girigoswami

2023

Appl. Chem. Eng.

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Increasing attention is being paid to bacterial nanocellulose (BNC) because of its environment-friendly properties. Researchers investigated the role of microbial hosts in BNC production due to the benefits of cellulose produced by microbes. Several research groups have developed techniques to make BNC on a large scale with the goal of developing new methods. A 3D network of micro and nanofibrils in BNC synthesized from several bacterial strains makes these BNC useful for reinforcing nanostructured composites that have increased Young’s modulus, tensile strength, purity, crystallinity, and water holding capacity. To overcome the barriers associated with the industrial scale production of BNC, different production techniques will be used, including static culture, cell-free production, agitated/shaking culture, using a variety of receptors for fermentation, and low-cost substrates as carbon sources. By in-situ and ex-situ fermentation processes, metal/metal oxide nanoparticle composites are among the most widely used materials in diagnostic and regenerative medicine. The purpose of the review is to update the researchers regarding the lucid production process and versatile applications of bacterial nanocellulose in biomedical field. We shall mainly discuss about the different methods for bacterial cellulose production and some of its applications in this mini-review.

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Section: Bnc For Energy Storagementioning

confidence: 99%

Bacterial nanocellulose-Robust preparation and application—A literature review

Thirumalai,

Girigoswami,

Girigoswami

2023

Appl. Chem. Eng.

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“…Platinum nanoparticles (PtNPs) have garnered extensive attention due to their diverse applications across fields like biomedicine, energy conversion, storage, environmental cleanup, sensing, and catalysis [1][2][3][4][5][6][7][8][9][10][11][12]. Via the customization of synthesis techniques and conditions, a wide array of platinum nanoparticle shapes can be achieved, each possessing distinct attributes and potential uses [2].…”

Section: Introductionmentioning

confidence: 99%

“…Via the customization of synthesis techniques and conditions, a wide array of platinum nanoparticle shapes can be achieved, each possessing distinct attributes and potential uses [2]. Platinum can be harnessed in the form of nanoparticles dispersed within aqueous or organic mediums, or it can be distributed onto different substrates [2][3][4][5][6][7][8][9][10][11]. While PtNPs in a medium can aggregate, proving challenging to stabilize, dispersing PtNPs on substrates offers versatility for multiple applications.…”

Section: Introductionmentioning

confidence: 99%

“…Intriguingly, while CO oxidation turnover frequency (TOF) remained consistent across Pt/Al 2 O 3 catalysts, C 3 H 6 oxidation TOF surged with increased Pt dispersion. In a distinct context, Ponjavic et al [6] showcased bacterial nanocellulose (BNC) as an effective eco-friendly support for high-performance PtNPs, particularly in methanol oxidation reactions. This sustainable catalytic system, leveraging BNC instead of conventional carbon-based materials, holds promise for broader implementation.…”

Section: Introductionmentioning

confidence: 99%

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Microwave-Assisted Synthesis of Pt/SnO2 for the Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol

Đurasović,

Štefanić,

Dražić

et al. 2023

Nanomaterials

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In this study, we present a new approach for the synthesis of Pt/SnO2 catalysts using microwave radiation. Pt(IV) and Sn(IV) inorganic precursors (H2PtCl6 and SnCl4) and ammonia were used, which allowed the controlled formation of platinum particles on the anisotropic SnO2 support. The synthesized Pt/SnO2 samples are mesoporous and exhibit a reversible physisorption isotherm of type IV. The XRD patterns confirmed the presence of platinum maxima in all Pt/SnO2 samples. The Williamson-Hall diagram showed SnO2 anisotropy with crystallite sizes of ~10 nm along the c-axis (< 00l >) and ~5 nm along the a-axis (< h00 >). SEM analysis revealed anisotropic, urchin-like SnO2 particles. XPS results indicated relatively low average oxidation states of platinum, close to Pt metal. 119Sn Mössbauer spectroscopy indicated electronic interactions between Pt and SnO2 particles. The synthesized samples were used for the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of excess NaBH4. The catalytic activity of the Pt/SnO2 samples for the reduction of 4-NP to 4-AP was optimized by varying the synthesis parameters and Pt loading. The optimal platinum loading for the reduction of 4-NP to 4-AP on the anisotropic SnO2 support is 5 mol% with an apparent rate constant k = 0.59 × 10–2 s–1. The Pt/SnO2 sample showed exceptional reusability and retained an efficiency of 81.4% after ten cycles.

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Biotemplated Platinum Nanozymes: Synthesis, Catalytic Regulation and Biomedical Applications

Lei,

Yu,

Yang

et al. 2024

ChemBioChem

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Platinum (Pt) nanozymes with multiple intrinsic enzyme‐mimicking activities have attracted extensive attention in biomedical fields due to their high catalytic activity, ease of modification, and convenient storage. However, the Pt nanozymes synthesized by the traditional method often suffer from uncontrollable morphology and poor stability under physicochemical conditions, resulting in unsatisfactory catalytic behavior in practical applications. To optimize the catalytic ability, biological templates have been introduced recently, which can guide the deposition of platinum ions on their surface to form specific morphologies and then stabilize the resulting Pt nanozymes. Given the promising potential of biotemplated Pt nanozymes in practical applications, it is essential to conduct a systematic and comprehensive review to summarize their recent research progress. In this review, we first categorize the biological templates and discussed the mechanisms as well as characteristics of each type of biotemplate in directing the growth of Pt nanozyme. Factors that impact the growth of biotemplated Pt nanozymes are then analyzed, followed by summarizing their biomedical application. Finally, the challenges and opportunities in this field are outlined. This review article aims to provide theoretical guidance for developing Pt nanozymes with robust functionalities in biomedical applications.

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Bacterial nanocellulose as green support of platinum nanoparticles for effective methanol oxidation

Cited by 7 publications

References 75 publications

Bacterial nanocellulose-Robust preparation and application—A literature review

Bacterial nanocellulose-Robust preparation and application—A literature review

Microwave-Assisted Synthesis of Pt/SnO2 for the Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol

Biotemplated Platinum Nanozymes: Synthesis, Catalytic Regulation and Biomedical Applications

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