Synthesis and Characterisation of Ligand Free Cadmium Imprinted Polymer for Sensing of Cd(II) from Aqueous Solution

Anuradha Baghel; Akula Bhuvaneswari; Virendra Vikram Singh; Mannan Boopathi; Beer Singh

doi:10.14429/dlsj.4.14180

Anuradha Baghel DRDE, Gwalior
Akula Bhuvaneswari DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India
Virendra Vikram Singh DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India
Mannan Boopathi DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India
Beer Singh DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India

DOI: https://doi.org/10.14429/dlsj.4.14180

Keywords: Cadmium; Imprinted polymer; Selective recognition; Interference; Polymer.

Abstract

Cadmium(II)-imprinted polymer [Cd(II)-IIP] was synthesized without using the conventional complexing ligand to reduce unnecessary step for complexing Cd(II). During synthesis of Cd(II)-IIP, the complete removal of Cd(II) from the polymer was confirmed using EDAX and AAS. Synthesized polymers ([Cd(II)-IIP], non-imprinted polymer (NIP) and polymer with cadmium (CdP) were also characterized and compared. SEM analysis of Cd(II)-IIP indicated the changes in surface morphology after imprinting, the polymer looked like a flaky material in comparison with NIP and CdP. BET surface area of Cd(II)-IIP (68 m²/g) was found to be more than that of NIP (24.6 m²/g) and CdP (17 m²/g). Cd(II)-IIP formed a complex with Cd(II) in the solution through carbonyl oxygen of the acrylamide as confirmed by FTIR. TGA analysis showed less char yield for Cd(II)-IIP than NIP. Cd(II)-IIP was further explored for the fabrication of ion selective electrode (ISE), which on binding with Cd(II) gave higher potential than NIP-ISE. Interference study was also performed using Cd(II)-IIP as such and also with fabricated ISE with Cd(II)-IIP using different cations such as Pb(II), Zn(II), Mn(II), Hg(II), and found that imprinted polymer showed more selectivity towards Cd(II) in aqueous solutions.

Author Biographies

Anuradha Baghel, DRDE, Gwalior

Dr Anuradha Baghel received her MSc (Chemistry) from Dr. B. R. Ambedkar University, Agra (U.P.) in 1999. She presently working as Scientist ‘D’ at DRDO-DRDE. She completed her Ph.D from Jiwaji University, Gwalior in 2011. Her research focuses on adsorptive removal and detection of toxicants present in water and in environment.

Akula Bhuvaneswari, DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India

Ms Akula Bhuvaneswari did her graduation from AN University in 2009. She worked in Indian Navy for two year and then joined Defence Research and Development Organisation in 2017. She is having interest in water analysis and instrumentation.

Virendra Vikram Singh, DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India

Dr Virendra V. Singh received his PhD from Jiwaji University, Gwalior, India in 2011. He did his Post doctoral from University of California, San Diego in 2014. His current research interests include self-propelled micro/nanomotors, fabrication of different reactive micromotors for remediation applications, and development of detection systems based on conducting polymers, graphene nanomaterials, and ionic liquids using electrochemical methods.

Mannan Boopathi, DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India

Dr M. Boopathi obtained his MSc, M Phil and PhD from University of Madras, India in 1993, 1994 and 2000, respectively. Presently, working as scientist at DRDO-DRDE, Gwarlior. His current fields of interest are the development of detection systems for chemical and biological agents using conducting polymers, molecularly imprinted polymers and ionic liquids based on electrochemical and optical methods.

Beer Singh, DRDO-Defence Research and Development Establishment, Gwalior - 474 002, India

Dr Beer Singh has completed his post graduation from Meerut University in chemistry, he did MPhil and PhD in chemistry from Delhi University. Presently working in DRDO-DRDE, Gwalior. He has over 37 years of research experience in the multi-disciplinary branch of chemistry. He has more than 125 research papers and 24 patents to his credit. He has received many prestigious awards including of scientist of the year in 2008.