Antimony 3 acetate

Oleic acid (OAc, Sigma-Aldrich), oleylamine (OAm, Acros, 80–90%), octadecene (Sigma-Aldrich), octadecene (ODE, Sigma-Aldrich), antimony (III) chloride (ABCR), antimony (III) acetate (Sigma-Aldrich), bis[trimethylsilyl]sulfide (Sigma-Aldrich), chloroform and acetone were used as received.

The following reagents
were precursors for the modified polyol synthesis of tetrahedrite
nanoparticles and were used as received from Sigma-Aldrich Chemical
Co.: antimony(III) acetate, (Sb(C₂H₃O₂)₃, ≥99.99%), copper(II) acetate monohydrate (Cu(C₂H₃O₂)₂·H₂O, ≥98%), sulfur powder (99.98%), zinc(II) acetate (Zn(C₂H₃O₂)₂, 99.99%), iron(II)
acetate (Fe(C₂H₃O₂)₂,
95%), nickel(II) acetate tetrahydrate (Ni(C₂H₃O₂)₂·4H₂O, 98%), manganese(II)
acetate (Mn(C₂H₃O₂)₂,
98%), and cobalt(II) acetate (Co(C₂H₃O₂)₂, 99.99%). Tetraethylene glycol (99%) from Alfa Aesar
and ThermoScientific was the solvent, while sodium borohydride powder
(NaBH₄, ≥98.0%) from Sigma-Aldrich was used as the
reducing agent. Anhydrous ethanol (200 proof, USP grade) from Pharmco-Aaper
was utilized to isolate the product.

The N-S-RGO/Sb nanocomposite was prepared by following the synthesis procedure reported below. All the synthesis products were used as purchased without any additional treatments.
In a microwave 100 mL Teflon reactor, provided with pressure and temperature sensors (FlexyWave, Milestone Inc., Shelton, CT, USA), 50 mg of GO (Graphenea Inc., Donostia, Spain) were dissolved in 30 mL DI water, with 20 mg of thiourea (Sigma-Aldrich, Milano, Italy). Then, 21.5 mg of antimony (III) acetate (Sigma-Aldrich, Milano, Italy) were put and dissolved in the aforementioned mixture. Subsequently, the precursor mixture was sonicated for about 30 min and the resulting slurry was microwaved for 15 min at 180 °C (800 W maximum power). The vessel was then chilled to room temperature. The final suspension was then gathered in tiny vessels, washed using DI water and freeze-dried in order to remove all the water.