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ZrO2/MoS2 heterojunction photocatalysts for efficient photocatalytic degradation of methyl orange

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Abstract

We report a simple solution-chemistry approach for the synthesis of ZrO2/MoS2 hybrid photocatalysts, which contain MoS2 as a cocatalyst. The material is usually obtained by a wet chemical method using ZrO(NO3)2 or (NH4)6Mo7O24·4H2O and C8H6S as precursors. The structural features of obtained materials were characterized by X-ray diffraction (XRD), highresolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), thermal analysis (TG-DTA), N2 adsorption-desorption, and photoluminescence (PL). The influence on the photocatalytic activity of the MoS2 cocatalyst concentration with ZrO2 nanoparticles was studied. The MZr-2 hybrid sample had the highest photocatalytic activity for the degradation of methyl orange (MO), which was 8.45 times higher than that of pristine ZrO2 ascribed to high specific surface area and absorbance efficiency. Recycling experiments revealed that the reusability of the MZr-2 hybrid was due to the low photocorrosive effect and good catalytic stability. PL spectra confirmed the electronic interaction between ZrO2 and MoS2. The photoinduced electrons could be easily transferred from CB of ZrO2 to the MoS2 cocatalyst, which facilitate effective charge separation and enhanced the photocatalytic degradation in the UV region. A photocatalytic mechanism is proposed. It is believed that the ZrO2/MoS2 hybrid structure has promise as a photocatalyst with low cost and high efficiency for photoreactions.

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Authors and Affiliations

  1. School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, Korea

    Surya Veerendra Prabhakar Vattikuti, Chan Byon & Chandragiri Venkata Reddy

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  1. Surya Veerendra Prabhakar Vattikuti
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  2. Chan Byon
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  3. Chandragiri Venkata Reddy
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Correspondence to Surya Veerendra Prabhakar Vattikuti, Chan Byon or Chandragiri Venkata Reddy.

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Prabhakar Vattikuti, S.V., Byon, C. & Reddy, C.V. ZrO2/MoS2 heterojunction photocatalysts for efficient photocatalytic degradation of methyl orange. Electron. Mater. Lett. 12, 812–823 (2016). https://doi.org/10.1007/s13391-016-6267-y

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  • DOI: https://doi.org/10.1007/s13391-016-6267-y

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