| Due to excellent photoelectric properties, Zinc telluride(ZnTe) as an importantⅡ-Ⅵ semiconductor has been widely used in the green light-emitting diodes, solar cells, lithium batteries, and terahertz devices, etc. However, its fast electronic-hole recombination rate limites its application at photocatalytic field. Improving Zn Te morphology or Zn Te matrix composites was used to develop the photocatalytic activity of sample so that expanded its application field. In the manuscript, different morphology of Zn Te and Zn Te based composite nanostructures were synthesized by solvothermal. And the morphologies, optical and catalytic properties of samples had been analyzed. The main research contents are divided into the following several aspects:(1) Along with Zn Te nanoparticles synthesized by one-pot facile solvothermal approach successfully, GO was reduced to RGO. The results explicitly revealed that cubic sphalerite Zn Te nanoparticles were distributed on the wrinkled RGO sheets.Due to effective electron transfer between Zn Te and RGO, the Zn Te/RGO nanocomposites showed enhanced photodegradation performance. The degradation of methylene blue can reach 56% under 4 hours visible-light irradiation. The expansion in visible light makes that the Zn Te/RGO nanocompounds of photocatalytic performance is a potential application in wastewater treatment.(2) ZnTe was successfully synthesized by solvothermal method with Na2TeO3 and Zn(CH3COO)2·2H2O as tellurium source and source of zinc with hydrazine hydrate as reductant. The effects of different amount of surfactant PVP and reaction time on the Zn Te morphologies were discussed. When adding 0.8 g PVP, samples could grow 3D nanoflowers. When the reaction time was 72 hours, samples could grow Zn Te rods. Due to specific surface area enlargement and visible-light response enhancement, the Zn Te nanoflowers showed enhanced photodegradation performance under UV light irradiation. The degradation of methylene blue can reach 54% under 2 hours UV light irradiation.(3) Zn Te/Zn O globular-like composites were synthesized by the solvothermal method using Na2 Te O3 and Zn O as precursor. The photocatalytic activity of Zn Te/Zn O globular-like composites were studied by adjusting the ratio of the amount of synthetic Zn Te particles. The XRD results showed the samples ascribed to Zn Te/Zn O composite. The SEM results showed that the morphologies of the composite were globular-like. UV-Vis used to test optical properties. PL and EIS explained the reason why photocatalytic activity of composites developed. The experimental results showed that photocatalytic activity of Zn Te/Zn O compositions were better than pure phase. In addition, when the molar ratio of Na2 Te O3 and Zn O was 1:0.4, the obtained composite showed the best photocatalytic performance because of degradation efficiency of methylene blue reached to 91% after 40 minutes UV irradiation. |
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