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首页> 外文期刊>Separation and Purification Technology >Deposition-precipitation synthesis of Yb3+/Er3+ co-doped BiOBr/AgBr heterojunction photocatalysts with enhanced photocatalytic activity under Vis/NIR light irradiation
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Deposition-precipitation synthesis of Yb3+/Er3+ co-doped BiOBr/AgBr heterojunction photocatalysts with enhanced photocatalytic activity under Vis/NIR light irradiation

机译：YB3 + / ER3 +共掺杂BioBR / AGBR异质结的沉积沉淀合成，在VIR / NIR光照射下具有增强的光催化活性的增强的光催化活性

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摘要

BiOBr:Yb3+,Er3+/AgBr (BYE/AgBr) heterojunction photocatalysts were successfully synthesized by a deposition-precipitation method. The characteristic of the as-obtained composites were tested by XRD, EDS, SEM, TEM, XPS, DRS and PL. As-obtained BYE/AgBr composites exhibit strong NIR light absorption and upconversion emission from NIR to UV-Vis due to the upconversion transition of Er3+. The heterojunction was constructed due to the appropriate band structures of BYE and AgBr, which distinctly improves the separation rate of electron-hole pairs. Compared with pure BYE and AgBr, as-synthesized BYE/AgBr samples exhibit distinctly improved photoactivities under the irradiation of Vis/NIR light, which can be attributed to the upconversion effect of Er3+ and the construction of heterojunction. This result provides a promising system for efficient harvest of the Vis-NIR light, which will contribute to the utilization of solar energy in the future.
机译：BioBR：YB3 +，ER3 + / AGBR（BYE / AGBR）通过沉积沉淀法成功地合成了异质结光催化剂。 通过XRD，EDS，SEM，TEM，XPS，DRS和PL测试AS获得的复合材料的特性。 由于ER3 +的上变化过渡，AS获得的BYE / AGBR复合材料表现出强烈的NIR光吸收和从NIR到UV-VI的升级发射。 由于BYE和AGBR的适当带结构，构造了异质结，其清楚地提高了电子孔对的分离率。 与纯BYE和AGBR相比，AS-合成的BYE / AGBR样品在VIS / NIR光照射下表现出明显改善的拍摄性，这可以归因于ER3 +的上增强效应和异质结的构造。 该结果提供了一个有希望的系统，用于有效收获Vis-Nir光，这将有助于未来太阳能的利用。

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