The novel and economical way to synthesize CuS nanomaterial of different morphologies by aqueous medium employing microwaves irradiation

Abstract

CuS nano/submicro materials with different morphologies were synthesized with spherical, tubular, leaflike and strip type structures in a simple aqueous system under microwave irradiation and sunlight and employing Cu (CH 3 COO) 2 , CuSO 4 Á5H 2 O, CuCl 2 , and as copper source and H 2 NCSNH 2 , Na 2 S 2 O 3 Á5H 2 O and CH 3 CSNH 2 as sulfur sources. The starting materials were used without assistance of any surfactant or template. An X-ray powder diffraction pattern confirms that the product was CuS with hexagonal phase. Scanning electron microscopy was used to observe the morphologies of the product. Different Phase transitions in CuS with respect to temperature are studied by DSC/TGA. The dependence of morphologies of product on different experimental conditions was also discussed.

Thermal stability of lead sulfide and lead oxide nano-crystalline materials

“…7. This initial mass loss involves multiple transitions occurring during the heating process (Nafees et al 2011(Nafees et al , 2012. As observed from differential thermogravimetric (DTGA) curve, dehydration takes place first resulting in the removal of water of crystallization around 100°C while a hump between 200 and 250°C corresponds to (2017) A sharp endothermic peak observed in DSC curve at 880°C indicates melting of PbO without the involvement of any mass loss as supported by TGA and DTGA curves.…”

“…Utilization of PbO and PbS nanostructures for potential applications is strongly subjected to their thermal stability in air and inert atmosphere. Structural phase transitions, oxidation, and recrystallization occur rapidly in metal sulfides upon small increments of temperature (Nafees et al 2011(Nafees et al , 2012(Nafees et al , 2015Qadri et al 2003;Sadovnikov et al , 2011. Therefore, a better understanding of oxidation temperature/resistance and thermal stability of PbO and PbS is crucial for realizing potential applications these materials promise.…”

A simple microwave assists aqueous route to synthesis CuS nanoparticles and further aggregation to spherical shape

“…However, copper sulfide has multifarious crystal chemistry due to its capability to form a variety of stoichiometric copper sulfide compounds. Jumble phase copper sulfides are generally synthesized in many synthetic means (Yang and Xiang 2005;Zou et al 2007;Tan et al 2005;Zhu et al 2007;Wang et al 2007;Zhang et al 2004;Nafees et al 2011). Ni et al (2004) reported the formation of CuS nanotubes using aqueous phase technique with different starting materials of diameter ranging from 350 to 1,000 nm.…”

Fast sono assisted ferrofluid mediated silver super – Adsorption over magnesium ferrite-copper sulfide chalcogenide with the aid of multivariate optimization

“…In the other hand, thiosulfate has ability to release H 2 S by reacting with H 2 O, then H 2 S react with copper ions and make CuS as black nanoparticles [56][57][58]. A reducing agent was needed to produce S 2À which EG helped.…”