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https://www.ias.ac.in/article/fulltext/jcsc/132/0107

Polyelectrolyte; phosphomolybdate nanoclusters; dye adsorption; Langmuir adsorption.

A polyelectrolyte complex (PEC) made up of poly(di-allyl di-methylammonium chloride) and poly(styrene sulphonate) polyelectrolytes has been synthesised and used for the immobilisation of phosphomolybdate (PMo), [PMo₁₂O₄₀]^3- nanoclusters. The material is characterised by FTIR, powder XRD, SEM, TEM and UV-Visible DRS spectroscopy. It was found that the PMo clusters are intact in the hybrid and are present as nanoaggregates within the layers of PEC. The amount of PMo present in the hybrid is estimated from thermal measurements and the optical band gap energy of the material is found to be in the semiconductor region. The presence of negatively charged PMo clusters helped in almost complete adsorption of cationic dyes, methylene blue and rhodamine B. The PMo/PEC hybrid has shown to follow Langmuir adsorption isotherm in case of both the dye molecules.

K SHAKEELA¹ SRUTHI GURU² G RANGA RAO²

1. Department of Chemistry, B.S. Abdur Rahman Crescent Institute of Science and Technology, Vandalur, Chennai 600048, India
2. Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India

Published

11 August 2020

Manuscript received

31 January 2020

Manuscript revised

9 April 2020

Accepted

19 April 2020