Abstract

In recent years, BiOI has been extensively studied due to its excellent absorption ability of visible light. However, low energy conversion efficiency affects its potential for practical application. In this paper, MoS₂/BiOI composite was synthesized by two-step ways and applied to the photoelectrochemical (PEC) detection of hexavalent chromium (Cr (VI)). Through a series of optical characterization, the structure and morphology of the material were measured in detail. UV–Vis diffuse reflection spectra and photoluminescence (PL) further proved that MoS₂/BiOI have the excellent PEC properties. The PEC experiment proved that the prepared MoS₂/BiOI has a wide linear range (0.05–160 μM) and low detection limit (0.01 μM, at S/N = 3), moreover, it has great application potential in actual samples.

Graphic abstract

MoS₂/BiOI composite were synthesized by two-step ways and showed wide linear range, low detection limit and great application potential in the photoelectrochemical (PEC) detection of hexavalent chromium (Cr (VI)).

中文翻译：

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使用层状MoS 2修饰的BiOI进行光电化学检测铬（VI）

摘要

近年来，BiOI由于其对可见光的出色吸收能力而被广泛研究。但是，低的能量转换效率影响了其在实际应用中的潜力。本文通过两步法合成了MoS ₂ / BiOI复合材料，并将其应用于六价铬（Cr（VI））的光电化学（PEC）检测。通过一系列的光学表征，详细测量了材料的结构和形态。UV-Vis漫反射光谱和光致发光（PL）进一步证明MoS ₂ / BiOI具有优异的PEC性能。PEC实验证明所制备的MoS ₂/ BiOI具有宽线性范围（0.05–160μM）和低检测限（0.01μM，在S / N = 3时），此外，它在实际样品中具有巨大的应用潜力。

图形摘要

MoS ₂ / BiOI复合材料是通过两步法合成的，具有线性范围宽，检出限低，在六价铬（Cr（VI））的光电化学（PEC）检测中具有巨大的应用潜力。