Sustainable biowaste-derived TiO2@CDs nanocomposite for photocatalytic dye degradation

IF 5.8 Q2 CHEMISTRY, MULTIDISCIPLINARY

Results in Chemistry Pub Date : 2026-05-05 Epub Date: 2026-02-25 DOI:10.1016/j.rechem.2026.103160

Krishna kanthi Gudimella , Ronak Lazarus , Wubshet Mekonnen Girma , Yoo-Jin Park , Balakishan Gorre , Amit Nag , Myung-Geol Pang , Gangaraju Gedda

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Abstract

Wastewater treatment is a crucial global concern with substantial environmental and public health ramifications. The degradation of carcinogenic impurities from industrial and domestic effluents has become challenging with conventional methods. Titanium dioxide‑carbon dots (TiO₂@CDs) nanocomposite was synthesized from bulk TiO₂ employing Ananas comosus as carbon source via simple ultrasonication for photocatalytic degradation of pollutants. The present work highlights the tailored bandgap of TiO₂@CDs specifically tuned to 2.31 eV, making it suitable for utilizing visible light radiation. The structural, electrochemical and optical characteristics of the synthesized TiO₂@CDs nanocomposite were characterised using Ultraviolet-visible spectroscopy, X-ray photoelectron spectroscopy, Scanning electron microscopy, Fourier-transform infrared, and X-ray diffraction. Results showed that TiO₂@CDs nanocomposite achieved 81% photocatalytic degradation of MB dye in 120 mins. Thus, this study opens a new possibility for developing effective semiconductor nanoparticles for applicability in photo-catalysis.

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可持续生物废物衍生的TiO2@CDs光催化染料降解纳米复合材料

废水处理是一个至关重要的全球性问题，具有重大的环境和公共卫生影响。从工业和生活污水中降解致癌杂质已成为传统方法的挑战。以红豆为碳源，通过简单超声法合成二氧化钛-碳点纳米复合材料（TiO2@CDs），用于光催化降解污染物。目前的工作重点是将TiO2@CDs的带隙调整到2.31 eV，使其适合利用可见光辐射。利用紫外可见光谱、x射线光电子能谱、扫描电镜、傅里叶变换红外光谱和x射线衍射对合成的TiO2@CDs纳米复合材料的结构、电化学和光学特性进行了表征。结果表明，TiO2@CDs纳米复合材料在120 min内对MB染料的光催化降解率达到81%。因此，该研究为开发适用于光催化的有效半导体纳米颗粒开辟了新的可能性。

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