A Simple Approach of CQDs@MoS₂ Nanosheets for Turn-On Fluorescence Sensor for Detection of Pb²⁺ Ions

Abstract:

The 2-Dimennsionnal nanocomposites are applied for the ennhannced fluorescence sensor for analysing heavy metal ions is explored using a simple novel technique based on green manufactured (CQDs@MoS₂) nanocomposite. The emission intensity of CQDs have a better dispersibility, and MoS₂ nanosheets have an excellent exfoliation, allowing the CQDs to adhere to the surface and form a label-free sensors. The emission peak of CQDs was quenched by transferring non-radiative energy as of CQDs to MoS₂ sheets in an excited state. However, when metal ions are included in the CQDs@MoS₂ nanocomposite, it develops a solid surface combined with the carbon dots nanosheets, that might aid in CD recovery. More intriguingly, the sensing performance of MoS₂ nanosheets were examined at various pH levels to better recognize the change in surface charge, which resulted in significantly improved responsiveness for identification of Pb (II) ions with LODs of 0.9 nM. Furthermore, it is suggested that present method are intended to be quick, easy, cost effective, environmental friendly for sensing heavy metal ions.

• Periodical: Key Engineering Materials (Volume 928)
• Pages: 33-38
• DOI: https://doi.org/10.4028/p-6o533s
• Online since: August 2022
• Authors: Anshul Singh, R. Rathinam*, Anil Kumar Yadav, Rajkumar Vasudevan, Indhumathi Kulandhaisamy, Malleboina Purushotham, Pandurang Y. Patil
• Keywords: CQDs Dots, CQDs@MoS2, Fluorescence, Free Sensors, Pb (II) Ions

References

[1] A. Lee, J. Chin, O.K. Park, H. Chung, J.W. Kim, S.-Y. Yoon and K. Park, A novel near-infrared fluorescence chemosensor for copper ion detection using click ligation and energy transfer, Chem. Commun., 49, (2013), p.5969.

DOI: 10.1039/c3cc42059k

[2] R. Zhou, B. Li, N. Wu, G. Gao, J. You, and J. Lan, Cyclen-functionalized perylenebisimides as sensitive and selective fluorescent sensors for Pb2+ in aqueous solution, Chem. Commun., 47, (2011), p.6668–6670.

DOI: 10.1039/c1cc11200g

[3] K. Radhakrishanan, P. S. Kumar. Target-receptive structural switching of ssDNA as selective and sensitive biosensor for subsequent detection of toxic Pb2+ and organophosphorus pesticide. Chemosphere, 287(2021) 132163.

DOI: 10.1016/j.chemosphere.2021.132163

[4] A. Barba-Bon, A.M. Costero, S. Gil, M. Parra, J. Soto, R. Martınez-Manez and F. Sancenon, A new selective fluorogenic probe for trivalent cations, Chem. Commun., 48, (2012), p.3000–3002.

DOI: 10.1039/c2cc17184h

[5] J. Wang, Y. Li, N.G Patel, G. Zhang, D. Zhoub and Y. Pang, A single molecular probe for multi-analyte (Cr3+, Al3+ and Fe3+) detection in aqueous medium and its biological application, Chem. Commun., 50,(2014), pp.12258-12261.

DOI: 10.1039/c4cc04731a

[6] J. Liang, M. Qin, R. Xu, X. Gao, Y. Shen, Q. Xu, Y. Cao and W. Wang, A genetically encoded copper (I) sensor based on engineered structural distortion of EGFP, Chem. Commun., 48, (2012), p.3890–3892.

DOI: 10.1039/c2cc30531c

[7] B. Wu, L. Xu, S. Wang, Y. Wang and W. Zhang, A PEGylated colorimetric and turn-on fluorescent sensor based on BODIPY for Hg (II) detection in water, Polym. Chem., 6(2015), pp.4279-4289.

DOI: 10.1039/c5py00390c

[8] T. Lan, K. Furuya and Y. Lu, A highly selective lead sensor based on a classic lead DNAzyme, Chem. Commun., 46 , (1210), pp.3896-3898.

DOI: 10.1039/b926910j

[9] F. Salimi, M. Kiani, C. Karami, M. AliTaher, Colorimetric sensor of detection of Cr (III) and Fe (II) ions in aqueous solutions using gold nanoparticles modified with methylene blue, OPtik. 158, (2018), pp.813-825.

DOI: 10.1016/j.ijleo.2018.01.006

[10] M. Ismail, M.I. khan, M. Alikhan, A. M. Asiri, and S. Bahadarkhan, Biosynthesis of silver nanoparticles for detection of hexavalent chromium and ammonia in aqueous solution, Physica E: Loe-dimensional Systems and Nanostructures, 103, (2018), pp.367-376.

DOI: 10.1016/j.physe.2018.06.015

[11] F. Sang, X. Li, Z. Zhang, J. Liu, and G. Chen, Recyclable colorimetric sensor of Cr3+ and Pb2+ ions simultaneously using a zwitterinic amino acid modified gold nanoparticles, Spectochimica Acta Part A: Molecular Spectroscopy. 193, (2017), pp.109-116.

DOI: 10.1016/j.saa.2017.11.048

[12] Y. Choi, Y. Park, T. Kang, and L.P. Lee, Selective and sensitive detection of metal ions by plasmonic resonance energy transfer-based nano-spectroscopy, Nature Nanotechnology, 4, (2009), pp.742-746.

DOI: 10.1038/nnano.2009.258

[13] K. Radhakrishanan, P. Panneerselvam, and S. Sivanesan, Fluorescence switching of green synthesized carbon dots@ g-C3N4nanosheet as a label-free sensor for detection of multiple metal ions," J PhotochemPhotobiol A.,389 (2020) 112204-112215.

[14] B-F.Ye, Y-J. Zhao, Y. Chen, T-T. Li, Z-Y. Xie, X-W. Zhao, and Z-Z. Gu, Colorimetric photonic hydrogel aptasensor for the screening of heavy metal ions, Nanoscale. 4, (2012), pp.5998-6003.

DOI: 10.1039/c2nr31601c

[15] C. Hao., L. Xua., C. Xing., H. Kuang., L. Wang., C. Xu., Oligonucleotide-based Fluorogenic sensor for simultaneous detection of heavy metal ions, Biosensors and Bioelecronics, 36, (2012), pp.174-178.

DOI: 10.1016/j.bios.2012.04.008

[16] S. Su, B. Chen.,M. He., B. Hu., Graphene oxide-silica composite coating hollow fiber solid phase microextraction online coupled with inductively coupled plasma mass spectrometry for the determination of trace heavy metals in environmental water samples, Talanta. 123, (2014), pp.1-9.

DOI: 10.1016/j.talanta.2014.01.061

[17] M. Mizaei., M. Behzadi., N. M. Abadi., A. Beizaei, Simultaneous sepration/ preconcentration of ultra trace heavy metals in industrial wastewaters by dispersive liguid-liquid microextaction based on solidification of floating organic drop prior to determination by graphite furnace atomic absorption spectrometry, Journal of Hazardous Materials.186, (2011), pp.1739-1743.

DOI: 10.1016/j.jhazmat.2010.12.080