One stone, three birds: up-conversion, photothermal and p-n heterojunction to boost BiOBr:Yb3+,Er3+/Cu3Mo2O9 full spectrum photodegradation

IF 4.3 3区工程技术 Q2 ENGINEERING, CHEMICAL

Frontiers of Chemical Science and Engineering Pub Date : 2024-06-15 DOI:10.1007/s11705-024-2469-2

Xintong Yao, Dong Zhang, Yupeng Liu, Yanzhao Chen, Dafeng Zhang, Junchang Liu, Xue-Yang Ji, Hengshuai Li, Peiqing Cai, Xipeng Pu

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Abstract

Broadening spectral response range to realize the full spectrum photocatalysis is crucial to develop photocatalysts with satisfactory light-energy conversion ability. A full-spectrum driven p-n heterojunction photocatalytic system was rationally designed through introducing the Er³⁺/Yb³⁺ co-doped BiOBr with up-conversion effect as the collector of near infrared light and photocatalysts substrate. Meanwhile, Cu₃Mo₂O₉ with the photothermal effect as a heat source to accelerate the reaction at the surface through absorbing the near infrared light. The photocatalytic activity of BiOBr:Yb³⁺,Er³⁺/Cu₃Mo₂O₉ composite was markedly strengthened under visible and near infrared light irradiation, and the BiOBr:Yb³⁺,Er³⁺/Cu₃Mo₂O₉-5 composite displayed the optimal photodegradation activities for 0.03372 min⁻¹ and 0.058 h⁻¹, being 2.3-folds and 2.4-folds than that of pure BiOBr:Yb³⁺,Er³⁺ under the visible and near infrared light, respectively. The position of doped ions (Yb³⁺ and Er³⁺) in BiOBr:Yb³⁺,Er³⁺ was determined from the X-ray absorption fine structure spectra. And the reasonable mechanism of p-n heterojunction was proposed base on the results of experimental and density functional theory calculation. This work provides a rational strategy for the design and development of full-spectrum heterojunction photocatalysts with the up-conversion and photothermal effects to increase the photocatalytic performance.

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一石三鸟：上转换、光热和 p-n 异质结促进 BiOBr：Yb3+,Er3+/Cu3Mo2O9 全光谱光降解

拓宽光谱响应范围以实现全光谱光催化对于开发具有令人满意的光能转换能力的光催化剂至关重要。通过引入具有上转换效应的 Er3+/Yb3+ 共掺杂 BiOBr 作为近红外光的收集器和光催化剂基底，合理设计了一种全光谱驱动的 p-n 异质结光催化系统。同时，具有光热效应的 Cu3Mo2O9 作为热源，通过吸收近红外光加速表面反应。在可见光和近红外光照射下，BiOBr:Yb3+,Er3+/Cu3Mo2O9 复合材料的光催化活性明显增强，BiOBr:Yb3+,Er3+/Cu3Mo2O9-5 复合材料在 0.03372 min-1 和 0.058 h-1，分别是纯 BiOBr:Yb3+,Er3+在可见光和近红外光下的 2.3 倍和 2.4 倍。通过 X 射线吸收精细结构图确定了 BiOBr:Yb3+,Er3+ 中掺杂离子（Yb3+ 和 Er3+）的位置。根据实验和密度泛函理论计算的结果，提出了 p-n 异质结的合理机制。这项工作为设计和开发具有上转换效应和光热效应的全谱异质结光催化剂提供了合理的策略，从而提高了光催化性能。

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来源期刊

Frontiers of Chemical Science and Engineering ENGINEERING, CHEMICAL-

CiteScore

7.60

自引率

6.70%

发文量

868

审稿时长

1 months

期刊介绍： Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.