Solvothermal synthesis of antimony sulfide dendrites for electrochemical detection of dopamine

Abstract

Sb2S3 dendrites composed of 1-dimensional rods were prepared by a facile solvothermal reaction. The dosage of the poly(acrylic acid) (PAA) morphology-controlling reagent and the reaction temperature are key factors determining the final morphology of the product. Temporal experiments revealed that the formation of Sb2S3 dendrites experienced successive stages including precipitate reaction, crystallization and tip splitting. The as-prepared Sb2S3 dendrites were further employed as sensing material for electrochemical detection of dopamine (DA). A cyclic voltammogram (CV) showed that an Sb2S3 dendrite modified electrode enables the selective electro-oxidation of DA in the presence of ascorbic acid (AA). The constructed biosensor demonstrated a linear response range of 0.125-160 μM and a detection limit of 0.1 μM, which suggests that the Sb2S3 dendrites are promising sensing materials in the electrochemical analysis of DA.

Revealing the formation mechanism and band gap tuning of Sb2S3 nanoparticles

“…Since the tips remained the bristle-like shape, even after the growth stopped after 18 h reaction time, a merging process was excluded. The growth of individual particle fragments, such as bristles, has been described in the literature as a dendrite-like splitting or branching of primary particles in an autoclave synthesis with ethylene glycol or polyethylene glycol as solvent [ 29 – 30 ]. The authors reasoned the cleavage at the particle tips by weak van der Waals forces between (Sb 4 S 6 ) n chains, of which the particles consisted, or by strongly bound ligands interfering with the crystal growth, respectively.…”

Covalently bonded compounds of heavy group 15/16 elements – Synthesis, structure and potential application in material sciences

“…Several synthetic pathways have been established over the years for the generation of binary Sb 2 E 3 and Bi 2 E 3 (E = S, Se, Te) nanoparticles such as polyol processes, [158] solvothermal routes, [149,159,160,161,162,163] glucose-assisted reduction routes, [164] and gas-induced reduction routes. [165] These general approaches have in common, that they typically use two different precursors as group 15 and group 16 element source.…”

Revealing the formation mechanism and band gap tuning of Sb2S3 nanoparticles

“…Since the tips remain their bristle-like shape, even after the growth stops after 18 h reaction time, a merging process is excluded. The growth of individual particle fragments, such as the bristles, was described in the literature as a dendrite-like splitting or branching of primary particles in an autoclave synthesis with ethylene glycol or polyethylene glycol as solvent [29,30]. The authors reasoned the cleavage at the particle tips by weak van-der-Waals forces between (Sb4S6)n chains, of which the particles consist, or by strongly bound ligands interfering with the crystal growth, respectively.…”