Gold and Silver Bimetallic Core-shell Nanoparticles with a Polydopamine Interface as an Ideal Catalytic Nanosystem

Year 2021, Issue: 4, 375 - 383, 25.05.2021

Asli Yılmaz

https://doi.org/10.15671/hjbc.739446

Abstract

Çekirdek-kabuk nanopartikül sistemler esnek ve sıradışı özellikleri ile başta katalitik dönüşüm olmak üzere farklı alanlarda kullanılmaktadır. Fakat, bu nanosistemleri üretmek için basit, düşük maliyetli ve yenilikçi stratejiler sınırlı sayıda olup, etkin çekirdek-kabuk nanoyapılar yüksek oranda talep görmektedir. Bu çalışmada ince bir polidopamin (PDOP) tabakası ile oluşturulan bimetalik altın ve gümüş çekirdek-kabuk nanosistemin üretimini önermekteyim. PDOP tabakası bir ara tabaka olarak indirgeme ve stabilize ajan olarak etkin bir performans sunmuştur. Bimetalik çekirdek-kabuk sistemin üretimi elektron mikroskop görüntüleri ve UV-vis absorpsiyon spektrası ile doğrulanmıştır. Nanoyapıların katalitik aktivite testleri, 4-nitrofenolün (4-NP) 4-aminofenole (4-AP) indirgenmesi, çekirdek-kabuk sisteminin tepkimenin ilerlemesini arttırdığı gösterilmiştir. Ayrıca, gümüş indirgeme süresinin önerilen nanosistemin katalitik performansı üzerinde önemli etkiye sahip olduğu gözlenmiştir. 60 dakika gümüş indirgeme süresi için 4-NP’nin 4-AP’ye tamamen dönüşümünün sadece 20 dakikada gerçekleştiği görülmüştür.

Keywords

Bimetallic nanoparticles, , Core-shell nanoparticles, Polydopamine, Catalytic conversion, Reduction of 4-nitrophenol

Supporting Institution

TÜBİTAK

Project Number

119Z740

Thanks

This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK, No: 119Z740). The authors also kindly acknowledge the East Anatolia High Technology Application and Research Center (DAYTAM) at Ataturk University for providing laboratory spaces and the characterization devices.

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