Camellia sinensis özütünde Cu nanopartiküllerinin yeşil sentezi ve amonyak boran dehidrojenasyonunda kullanımı

Abstract

Sunulan çalışmada, Camellia sinensis (yeşil çay) bitki özütü kullanılarak Cu nanopartiküllerinin yeşil sentezi gerçekleştirilmiştir. Camellia Sinensis özütünde bol miktarda bulunan polifenolik doğal bileşenler, çözeltideki Cu2+ iyonlarını biyolojik indirgeme yoluyla Cu0 nanopartiküllerine indirgemiş ve elde edilen Cu0 nanopartiküllerinin stabilizasyonunu sağlamıştır. Hazırlanan Camellia sinensis özütü ile stabilize edilmiş Cu nanopartikülleri, FT-IR, XRD ve TEM spektroskopik yöntemleri kullanılarak karakterize edilmiş ve amonyak boran hidroliz reaksiyonundaki katalitik aktivitesi incelenmiştir. Oldukça hızlı ve ucuz bir şekilde hazırlanan katalizör, herhangi bir ayırma veya saflaştırma işlemine tabi tutulmadan AB hidrolizi ile doğrudan hidrojen üretiminde kullanılmıştır. Katalizör miktarı, AB konsantrasyonu ve sıcaklık parametrelerinin Camellia sinensis özütü stabilize Cu nanopartikül katalizli AB hidroliz kinetiği üzerindeki etkileri ve katalizörün tekrar kullanılabilirliği test edilmiştir. Çevre dostu katalizör malzeme, herhangi bir kimyasal işleme gerek kalmadan, kolayca erişilebilen doğal bir üründen pratik şekilde in-situ olarak hazırlanmıştır ve AB hidroliz reaksiyonunun aktivasyon enerjisi (Ea) 69,96 kJ.mol-1 olarak hesaplanmıştır.

Keywords

• Camellia Sinensis
• Cu nanoparçacık
• yeşil sentez
• amonyak boran
• hidrojen

Supporting Institution

TÜBİTAK 2209-A Üniversite Öğrencileri Araştırma Projeleri Destekleme Programı

Project Number

1919B012334826

Ethical Statement

Yazarlar tüm etik standartlara uyduklarını beyan ederler.

Thanks

Yazarlar, 1919B012337422 proje numarası kapsamında sağladığı mali destek için TÜBİTAK'a teşekkür eder.

The green synthesis of Cu NPs in Camelia sinensis extract and their use in ammonia borane dehydrogenation

Abstract

In the presented study, green synthesis of Cu nanoparticles was achieved in Camellia sinensis (green tea) plant extract. The polyphenolic natural components abundant in Camellia sinensis extract reduced Cu2+ ions in the solution into Cu0 nanoparticles through bioreduction also ensured the stabilization of the resulting Cu0 nanoparticles. The prepared Camellia Sinensis extract stabilized Cu nanoparticles was characterized using FT-IR, XRD, and TEM spectroscopic methods, and its catalytic activity in the ammonia borane hydrolysis reaction was investigated. The rapid manufactured and quite inexpensive catalyst has been utilized on direct hydrogen production by AB hydrolysis without going through any separation or purification procedures. The effects of catalyst amount, AB concentration, and temperature parameters on Camellia sinensis extract stabilized Cu nanoparticles catalyzed AB hydrolysis kinetics, and the reusability of the catalyst were tested. An environmental friendly catalyst material has been prepared practically in-situ from an easily accessible natural product without requiring any chemical process, and the activation energy, Ea, of the AB hydrolysis reaction has been calculated as 69.96 kJ.mol-1.

Keywords

• Camellia Sinensis
• Cu nanoparticles
• green synthesis
• ammonia borane
• hydrogen

Supporting Institution

TÜBİTAK 2209-A University Student Research Projects Support Program

Project Number

1919B012334826

Ethical Statement

The authors declare that they comply with all ethical standards

Thanks

The authors would like to thank TÜBİTAK for the financial support under the Project number 1919B012337422

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