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首页> 外文期刊>RSC Advances >Novel BiIO4/BiVO4 composite photocatalyst with highly improved visible-light-induced photocatalytic performance for rhodamine B degradation and photocurrent generation
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Novel BiIO4/BiVO4 composite photocatalyst with highly improved visible-light-induced photocatalytic performance for rhodamine B degradation and photocurrent generation

机译：新型BiIO4 / BiVO4复合光催化剂，具有明显改善的可见光诱导的若丹明B降解和光电流产生的光催化性能

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摘要

A novel BiIO4/BiVO4 heterojunction photocatalyst has been successfully developed by a facile hydrothermal route for the first time. X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectra (DRS) were utilized to characterize the crystal structures, morphologies and optical properties of the as-prepared products. Under visible light irradiation (lambda > 420 nm), the BiIO4/BiVO4 composite exhibits much better photoelectrochemical performance for rhodamine B (RhB) degradation and photocurrent (PC) generation compared to pure BiIO4 and BiVO4. This significant enhancement on visible-light-driven photocatalytic activity should be ascribed to the formation of the BiIO4/BiVO4 heterojunction, which can result in the high separation and transfer efficiency of photogenerated charge carriers. It was verified by electrochemical impedance spectra (EIS). The active species trapping experiment demonstrated that h(+) play a critical role during the photocatalytic process, which is consistent with the supposed photocatalytic mechanism.
机译：新型的BiIO4 / BiVO4异质结光催化剂已首次通过简便的水热途径成功开发。利用X射线衍射（XRD），扫描电子显微镜（SEM）和紫外可见漫反射光谱（DRS）来表征所制备产品的晶体结构，形态和光学性质。与纯BiIO4和BiVO4相比，在可见光照射下（λ> 420 nm），BiIO4 / BiVO4复合物对于若丹明B（RhB）降解和光电流（PC）生成具有更好的光电化学性能。 BiIO4 / BiVO4异质结的形成应归因于可见光驱动的光催化活性的显着提高，这可能导致光生载流子的高分离和转移效率。通过电化学阻抗谱（EIS）进行了验证。活性物种捕获实验表明，h（+）在光催化过程中起关键作用，这与假定的光催化机理是一致的。

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