Hydrothermal Synthesis of Terbium doped Antimony Selenide Nanomaterials and Investigation of Their Photocatalytic Performance

Document Type : Research Article


1 Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran.

2 Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad, Iran

3 School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea



Tb3+-doped antimony selenide nanomaterials were prepared via a hydrothermal route through the co-reduction method. The obtained products were characterized utilizing Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and X-ray powder diffraction (XRPD).  Powder XRD patterns indicate that the TbxSb2-xSe3 crystals (x = 0.00-0.1) are isostructural with Sb2Se3. SEM images show that doping of Tb3+ ions in the lattice of Sb2Se3 results in nanoparticles. The electrical conductance of terbium-doped antimony selenide is higher than undoped Sb2Se3 and increases with temperature. The synthesized nanomaterials were used as heterogeneous photocatalysts for the degradation of some water pollutant organic dyes under direct visible (with fluorescent light with 40 W Power). Rhodamine B (RB) was used as a typical dye to obtain the optimum photocatalytic degradation conditions. The photocatalytic reaction yield was 76% at the present conditions. The influence of radical scavengers on degradation percentage was investigated.


Main Subjects

In this research, pure and Tb3+–doped Sb2Se3 were prepared by a simple hydrothermal approach and were employed as photocatalysts under visible light irradiation for removal of Rhodamine B. XRD analysis displayed well crystalline cubic structure of Sb2Se3. The substitution of Tb3+ions into the Sb2Se3 lattice was validated by the EDS analysis. The surface morphology and size of the samples have obvious changes from rods to nanoparticles after incorporating Tb3+ into the lattice of Sb2Se3. Results indicated that the decolorization efficiency of Tb3+-doped Sb2Se3 was higher than pure Sb2Se3, and degradation efficiency was affected by the content of Tb dopant in Sb2Se3. The promoted decolorization efficiency was found in the presence of 10 % Tb3+-doped Sb2Se3 particles. The color removal percentage of Tb0.1Sb1.90Se3 and undoped Sb2Se3 was 77.15 and 11.37% after 120 min of treatment, respectively. Benzoquinone caused the highest negative effect on the photocatalysis of Rhodamine B. Generally, the application of Tb3+-doped Sb2Se3 particles can be a promising and effective approach for the elimination of colored effluents.

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