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首页> 外文期刊>Applied Surface Science >Nickel-Doping accelerated charge separation in flower ball-like Bi_4O_5I_2 for efficient visible-light photocatalytic performance
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Nickel-Doping accelerated charge separation in flower ball-like Bi_4O_5I_2 for efficient visible-light photocatalytic performance

机译：镍掺杂加速在花球状Bi_4O_5i_2中的加速分离，以实现高效的可见光光催化性能

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摘要

Ion-doped semiconductor photocatalysts were considered to be an important strategy to improve photocatalytic performance. A simple one-step solvothermal method was used to prepare flower ball-shaped Bi4O5I2 nano materials modified by Nickel. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), Xray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectra, photocurrent response and EIS Nyquist plots were used to explore its structural composition and photoelectrochemical properties. The photocatalytic activity was studied by simulating the degradation of tetracycline under visible light. The degradation results showed that photocatalytic effect of 5 wt% Ni-doped Bi4O5I2 was the best among the samples, and the degradation rate was 91%. The capture experiment shown that the vital active radical is center dot O-2(-). The final results shown that Ni-doping improved the charge separation efficiency and the specific surface area of the material, and it is proved by Raman that Ni-doping formed shallow traps on the surface of Bi4O5I2, which promoted the separation and transfer of carriers and improved the photocatalytic activity. This work can provide a reference for the subsequent development of bismuth-based photocatalysts.
机译：认为离子掺杂的半导体光催化剂是改善光催化性能的重要策略。一种简单的一步溶剂热法用于制备由镍改性的花球形Bi4O5i2纳米材料。扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射（XRD），X射线光电子能谱（XPS），UV-VI扩散反射光谱，光电流响应和EIS奈奎斯特图探讨其结构组成和光电化学性质。通过在可见光下模拟四环素的降解来研究光催化活性。降解结果表明，样品中5wt％Ni-掺杂Bi4O5i2的光催化作用是最佳的，降解速率为91％。捕获实验表明，生命活动的基团是中心点O-2（ - ）。最终结果表明，Ni掺杂改善了材料的电荷分离效率和比表面积，并且通过拉曼证明了诸如Bi4O5i2表面上的Ni-掺杂形成的浅疏水阀，这促进了载体的分离和转移改善了光催化活性。这项工作可以为后续发展的基于铋的光催化剂提供参考。

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