Highly fluorescent nickel based metal organic framework for enhanced sensing of Fe3+ and Cr2O72- ions

Jasjot Kaur; Manjot Kaur; Sushil Kumar Kansal; Ahmad Umar; Hassan Algadi

doi:10.1016/j.chemosphere.2022.136832

Highly fluorescent nickel based metal organic framework for enhanced sensing of Fe³⁺ and Cr₂O₇^2- ions

Chemosphere. 2023 Jan;311(Pt 1):136832. doi: 10.1016/j.chemosphere.2022.136832. Epub 2022 Oct 15.

Authors

Jasjot Kaur¹, Manjot Kaur¹, Sushil Kumar Kansal², Ahmad Umar³, Hassan Algadi⁴

Affiliations

¹ Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh, 160014, India.
² Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh, 160014, India. Electronic address: sushilkk1@pu.ac.in.
³ Department of Chemistry, College of Science and Arts, Najran University, Najran, 11001, Saudi Arabia; Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran, 11001, Saudi Arabia; Department of Materials Science and Engineering, The Ohio State University, Columbus, 43210, OH, USA. Electronic address: ahmadumar786@gmail.com.
⁴ Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran, 11001, Saudi Arabia; Department of Electrical Engineering, College of Engineering, Najran University, Najran, 11001, Saudi Arabia.

PMID: 36257400
DOI: 10.1016/j.chemosphere.2022.136832

Abstract

Heavy metal contamination has sparked widespread concern among the populace. The significant issues necessitate the creation of high-performance fluorescent pigments that can identify harmful elements in water. The present study deals with metal organic framework [MOF] based on nickel [Ni-BDC MOF]. The Ni-BDC MOF was prepared by facile solvothermal method using nickel nitrate hexahydrate and terephthalic acid ligand as precursors. The MOF was characterized by various techniques in order to examine the crystal, morphological, structural, composition, thermal and optical properties. The detailed characterizations revealed that the synthesized Ni-BDC MOF are well-crystalline with high purity and possessing 3D rhombohedral microcrystals with rough surface. The MOF demonstrate good luminescence performance and excellent water stability. According to the Stern Volmer plot, the tests set up under optimized conditions demonstrate a linear correlation between the fluorescence intensity and concentration of both ions, i.e. Fe³⁺, and Cr₂O₇^2- ions. The linear range and detection limit for Fe³⁺ and Cr₂O₇^2- were found to be 0-1.4 nM and 0.159 nM, and 0-1 nM and 0.120 nM, respectively. The mechanisms for the selective detection of cations and anions were also explored. The recyclability for the prepared MOF was checked up to five cycles which showed excellent stability with just a slight reduction in efficiency. The constructed sensor was also used to assess the presence of Fe³⁺ and Cr₂O₇^2- ions in actual water samples. The results of the different experiments revealed that the prepared MOF is a good material for detecting Fe³⁺ and Cr₂O₇^2- ions.

Keywords: Fe(3+) cation and Cr(2)O(7)(2−) anion; Luminescence detection; Ni-organic framework.

MeSH terms

Cations
Fluorescent Dyes / chemistry
Metal-Organic Frameworks* / chemistry
Nickel
Water / chemistry

Substances

Metal-Organic Frameworks
Nickel
Fluorescent Dyes
Water
Cations