Abstract Doping bismuth oxychloride (BiOCl) with other elements can help improve its photocatalytic performance. The present study used a simple one-step hydrothermal method to synthesize tungsten-doped BiOCl nanosheets. The results showed the negligible effects of W-doping on the crystal structure, morphology and specific surface area of BiOCl. Diffuse reflectance spectroscopy (DRS), however, showed increases in light absorption and a shift in the absorption edge towards higher wavelengths in the presence of W. Measuring the photocatalytic performance of the samples in decomposing an aqueous solution of rhodamine B (RhB) under light irradiation showed that doping BiOCl with W preserves photocatalytic performance under both UV irradiation and visible-light irradiation, whereas pure BiOCl showed negligible photocatalytic activities under visible-light irradiation. The high photocatalytic activity of BiOCl doped with W compared to that of pure BiOCl is explained by the reduction in band gap and increase in light absorption due to the formation of W energy bands in the forbidden energy gap of BiOCl. A plausible mechanism was proposed for the photocatalytic activity of W-doped BiOCl in decomposing RhB under visible light.

中文翻译：

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水热合成W掺杂BiOCl纳米片在可见光下光催化降解罗丹明B

摘要 将氯氧化铋（BiOCl）与其他元素掺杂可以提高其光催化性能。本研究使用简单的一步水热法合成掺钨的 BiOCl 纳米片。结果表明，W掺杂对BiOCl的晶体结构、形貌和比表面积的影响可以忽略不计。然而，漫反射光谱 (DRS) 显示在 W 存在下光吸收增加和吸收边缘向更高波长移动。 测量样品在光下分解罗丹明 B (RhB) 水溶液的光催化性能辐照表明，用 W 掺杂 BiOCl 可以在紫外线照射和可见光照射下保持光催化性能，而纯 BiOCl 在可见光照射下的光催化活性可以忽略不计。与纯 BiOCl 相比，掺 W 的 BiOCl 的高光催化活性是由于在 BiOCl 的禁能隙中形成 W 能带导致带隙减小和光吸收增加。提出了 W 掺杂的 BiOCl 在可见光下分解 RhB 的光催化活性的合理机制。