Synthesis Of Sb₂S₃Nanomaterials And Their Visible-light Photocatalytic Property

In this paper, Sb₂S₃nanomaterials with different morphologies were synthesizedby different method. This main content includes three parts: Synthesis of Sb₂S₃nano-flowers via refluxing approach; preparation of Sb₂S₃nanorods by microwaveirradiation method; synthesis of straw-bundled-like Sb₂S₃by hydrothermal method.Fower-like antimony trisulfide （Sb₂S₃） nanostructures have been successfullysynthesized under refluxing conditions using C₄H₂KO₆Sb·1.5H₂O， EDTA andthioacetamide as starting materials and ethylene glycol as the solvent. The as-preparedsamples were characterized by means of XRD, SEM, HRTEM, UV-Vis techniques.X-ray diffraction （XRD） indicates that the obtained sample is orthorhombic-phaseSb₂S₃with calculated lattice parameters a=1.123nm, b=1.131nm, c=0.3833nm.Scanning electron microscopy （SEM） and transmission electron microscopy （TEM）images show that the flower-like Sb₂S₃is composed of nanorods with170–550nm indiameter and1.5–5.4μm in length. UV-Vis analysis exhibits that the band gap ofSb₂S₃nanoflowers is1.90eV. The visible-light photocatalytic tests show that theas-prepared Sb₂S₃nanoflowers have high visible-light photocatalytic activity for thedegradation of rhodamine B under300W Xe lamp irradiation. The degradation rate ofrhodamine B is up to93.3%after9h degradation.Antimony trisulfide （Sb₂S₃） nanorods have been successfully synthesized undermicrowave irradiation by the reaction of antimony potassium tartrate, thiourea （Tu）and EDTA with ethylene glycol as solvent. The crystal structures, compositions,morphologies and optical properties of the as-prepared samples were characterized byXRD, SEM, HRTEM and UV-Vis techniques. It was studied that microwavefirepower, microwave time, EDTA and surfactant have an effect on the morphology ofthe samples. The300W Xe lamp was used as light source to investigate thephotocatalytic activity of Sb₂S₃nanorods for the degradation of rhodamine B. Theresults indicate that the obtained sample is orthorhombic-phase single-crystallineSb₂S₃nanorods with calculated lattice parameters a=1.128nm, b=1.131nm, c=0.3835nm, and155nm in average diameter and3.5μm in length. UV-Vis analysis indicatesthat the band gap of Sb₂S₃nanorods is1.54eV. The photocatalytic tests show that thedegradation rate of rhodamine B is up to94.1%after9h under300W Xe lampirradiation. Straw-bundled-like Sb₂S₃nanostructures have been successfully synthesized viahydrothermal method by the reaction of antimony potassium tartrate, EDTA andL-cysteine. The phases, elements, morpholgies and optical properties of the sampleswere investigated by XRD, SEM, HRTEM and UV-Vis techniques. The photocatalyticactivity of Sb₂S₃was evaluated by the decomposition of rhodamine B in aqueoussolution. The results demonstrated that as-prepared product is orthorhombic-phaseSb₂S₃with calculated lattice parameters a=1.125nm, b=1.131nm, c=0.3835nm.Straw-bundled-like Sb₂S₃nanostructure is composed of nanorods with the averagediameter of250nm and the length of5.8μm. It is found that the reaction time,temperature, EDTA, solvent and sulfur source play important roles in the synthesis ofSb₂S₃nanostructures. UV-Vis analysis indicates that Straw-bundled-like Sb₂S₃nanostructures are a semiconductor with the band gap Eg=1.90eV.