Recycling of the scrap LCD panels by converting into the InBO3 nanostructure product

Assefi, Mohammad; Maroufi, Samane; Sahajwalla, Veena

Recycling of the scrap LCD panels by converting into the InBO3 nanostructure product

2019

Assefi, Mohammad | Maroufi, Samane | Sahajwalla, Veena

Preparation of the value-added products from e-waste resources is an important step in the recycling process. The present paper aims to propose a methodology for the recovery of In from scrap LCD panel via preparation of InBO₃ nanostructure. Discarded LCD panel was subjected to a recycling process through crushing, milling, and oxalic acid leaching to prepare In₂(C₂O₄)₃·6H₂O. Through the leaching process, B(OH)₃ from glass part (alumina borosilicate) has been leached out along with indium oxalate hydrated. Further thermal treatment on these extracted materials at 600 °C could result in the formation of InBO₃ nanostructures with an average particle size of 20 nm. A multistep mechanism based on thermodynamic calculations for the recycling of the InBO₃ form extracted precursors was proposed. Graphical abstract

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