Sharma Aarti, Sharotri Nidhi, Kandwal Pankaj, Sharma Rakesh Kumar, Sud Dhiraj, Rai Ritu, Hnydiuk-Stefan Anna
Department of Chemistry, Sant Longowal Institute of Engineering and Technology (Deemed University), Longowal, 148106, Sangrur, Punjab, India.
Department of Chemistry, NIT Uttarakhand, Srinagar, Garhwal, 246174, India.
Sci Rep. 2024 Jun 13;14(1):13677. doi: 10.1038/s41598-024-64167-5.
The present work describes the development of TiO/SeO nanostructure as a potential candidate for visible light photocatalysis as well as selective fluorophore for the sensing of picric acid. The obtained nanostructure consists of uniform globular nanoparticles having approximate size of 170 nm and possess an optical band gap of 2.33 eV with absorption maxima at 473 nm. The photocatalyst was able to achieve 90.34% degradation efficiency for 2, 4-dichlorophenol (2,4-DCP) with rate constant of 0.0046 min in the visible region. Further the nanostructure was able to serve as a selective fluorophore for sensing of Picric acid portraying more than 95% of fluorescence quenching when the concentration of PA is 10 M. Theoretical calculations indicate the interaction of organic pollutants with the nanostructure and reveal that both picric acid (- 66.21 kcal/mol) and 2,4-DCP (- 12.31 kcal/mol) possess more negative binding energy values demonstrating a strong interaction of both with the nanostructure, making it suitable for the degradation as well as sensing of organic pollutants. Thus this study explains the potential of prepared catalyst for waste water treatment.
本工作描述了TiO/SeO纳米结构的开发，其作为可见光光催化的潜在候选物以及用于苦味酸传感的选择性荧光团。所获得的纳米结构由尺寸约为170 nm的均匀球状纳米颗粒组成，其光学带隙为2.33 eV，吸收最大值在473 nm处。该光催化剂在可见光区域对2,4-二氯苯酚（2,4-DCP）的降解效率能够达到90.34%，速率常数为0.0046 min⁻¹。此外，当苦味酸（PA）浓度为10⁻⁶ M时，该纳米结构能够作为选择性荧光团用于苦味酸传感，表现出超过95%的荧光猝灭。理论计算表明有机污染物与纳米结构之间的相互作用，并揭示苦味酸（-66.21 kcal/mol）和2,4-DCP（-12.31 kcal/mol）都具有更负的结合能值，表明两者与纳米结构都有很强的相互作用，使其适用于有机污染物的降解以及传感。因此，本研究解释了所制备催化剂在废水处理方面的潜力。
