Stachys Eudenia'dan Türetilmiş Karbon Kuantum Noktalarının Yeşil Sentezi ve Fotokatalitik Uygulamaları

Abstract

Bu çalışmada, karbon kuantum noktaları ve TiO2 kombinasyonu elde edilmiştir ve bu kompozit yapıların ultraviyole ışık altındaki fotoaktiviteleri rapor edilmiştir. Karbon kuantum noktası, sadece Türkiye'nin güneyinde bulunan endemik bir bitki olan Stachys euadenia'dan elde edilmiştir. Karbon kuantum nokta-TiO2 nanokompozitleri, çevre dostu, düşük maliyetli ve iyi kristalleşmiş nanoparçacıkların elde edilmesinde basit ve etkili bir yöntem olan kolay hidrotermal yaklaşımla üretilmiştir. Bu nanokompozitlerin yapısal ve morfolojik özellikleri; X-ışını kırınımı, tünelleme elektron mikroskopisi ve taramalı elektron mikroskopisi analizleri ile karakterize edilmiştir. Ayrıca, karbon kuantum noktalarının optiksel analizleri soğuurma ve floresans spektroskopisi ile gerçekleştirilmiştir. TiO2 ve karbon kuantum nokta-TiO2 nanokompozitlerinin fotokatalitik aktivitesi ultraviyole ışık aydınlatması altında metilen mavisi boyasının bozulmasıyla incelenmiştir. Karbon kuantum nokta-TiO2 nanokompozitleri, TiO2'den daha iyi bir aktivite göstermiştir.

Keywords

• Yeşil sentez
• Karbon kuantum noktalar
• fotokataliz

Green Preparation of Stachys Eudenia-Derived Carbon Quantum Dots and Their Photocatalytic Applications

Abstract

In this present work, the composites were obtained from carbon quantum dots and TiOf via green synthesis and the photoactivities of these composite structures were investigated under ultraviolet light. Carbon quantum dot was obtained from Stachys euadenia which is an endemic plant found only in southern Türkiye. Carbon quantum dot-TiO2 nanocomposites were fabricated via facile hydrothermal approach which is an easy and effectual method to obtaining of environmentally friendly, low cost and well crystallized nanoparticles. The structural and morphological characteristics of these nanocomposites were investigated by X-ray diffraction, tunneling electron microscopy and scanning electron microscopy. Also, optical analyses of carbon quantum dots were carried out by absorbance and fluorescence spectroscopy. Photocatalytic activity of TiO2 and carbon quantum dot-TiO2 nanocomposites were investigated under ultraviolet light illumination with the decomposition of methylene blue dye. Carbon quantum dot-TiO2 nanocomposites show a better activity than TiO2.

Keywords

• Green synthesis
• Carbon Quantum Dots
• Photocatalysis

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