A New Approach of Synthesis of Micro/Nanoscale HgS Spheres

Abstract

Micro/nanoscale spherical HgS has been prepared by reaction of Na ₂ [Hg(HL) ₂ (H ₂ O) ₂ ]; 1:2 (M:L) chelate complex with alkaline solution of thiourea in aqueous solution phase. The metal chelate complex was prepared by reaction of Hg(II) ions with 2-hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulphonic acid sodium salt; eriochrome black T (EBT, NaH₂L) in alkaline medium. The chelate complex precursor thus prepared was characterized by various physico-chemical and spectral techniques for structure determination. The spherical HgS material was characterized by scanning electron microscopy and energy dispersive X-ray analysis to determine morphology and chemical composition. The optical property was determined by UV-Vis spectrum. A possible formation mechanism has also been discussed in this article.

Keywords:

• chemical synthesis
• EDX
• electron microscopy
• micro/nano HgS material
• optical properties

The authors are thankful to All India Council for Technical Education, New Delhi for providing RPS project grant. The authors also gratefully acknowledge DRDE, Gwalior for SEM (EDX) and IR analysis.