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Gentle preparation of layered perovskite oxyfluoride nanosheets and exploration of excellent catalytic activity
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2025-01-24 , DOI: 10.1016/j.surfin.2025.105898
Xiaofeng Yin, Yiwen Li, Dongxiao Yang, Junya Shen, Wenqi Han, Manjia Zhang, Mengting Zhuang, Xiaoying Tang, Runhan Gao, Xiaoning Li, Shujie Sun
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2025-01-24 , DOI: 10.1016/j.surfin.2025.105898
Xiaofeng Yin, Yiwen Li, Dongxiao Yang, Junya Shen, Wenqi Han, Manjia Zhang, Mengting Zhuang, Xiaoying Tang, Runhan Gao, Xiaoning Li, Shujie Sun
Bismuth layered perovskite oxyfluorides have garnered significant attention due to its excellent photocatalytic activity. However, conventional synthesis of these materials often relies on the hazardous use of hydrofluoric acid, posing considerable risks. Achieving a gentle and controllable synthesis of high-purity oxyfluoride with well-defined morphology and excellent activity remains challenging. Here, we developed a modified molten salt method to gently prepare Bi2 NbO5 F (BNOF-M) and Bi2 TiO4F2 (BTOF-M) nanosheets. Using BNOF-M as a model catalyst, high-resolution electron microscopy reveals that the top and lateral exposed facets exposed in the nanosheet corresponds to {001} and {100}, respectively. The optimized catalyst, BNOF-M4, exhibits superior hydrogen evolution and photodegradation activities that were 129 and 15.6 times higher than those of the traditional solid-phase sample (BNOF-S). Further physical characterization indicates that the enhanced activity of BNOF-M4 could be attributed to its larger specific surface area, improved surface hydrophilicity, and favorable grain size, despite BNOF-S showing a longer carrier lifetime. Comparative experiments further demonstrate that the pollutant degradation activity of BNOF-M4 is comparable to the benchmark performance of commercial TiO2 (P25). This work introduces a safe and reliable preparation method that not only enables in-depth exploration of bismuth-based perovskite oxyfluoride materials, but also holds promise for real-world applications.
中文翻译:
层状钙钛矿氧氟化物纳米片的温和制备和优异催化活性的探索
铋层状钙钛矿氟氧烷因其优异的光催化活性而受到广泛关注。然而,这些材料的常规合成通常依赖于氢氟酸的危险使用,这带来了相当大的风险。实现具有明确形态和出色活性的高纯度氧氟化物的温和可控合成仍然具有挑战性。在这里,我们开发了一种改进的熔盐方法来温和制备 Bi2NbO5F (BNOF-M) 和 Bi2TiO4F2 (BTOF-M) 纳米片。使用 BNOF-M 作为模型催化剂,高分辨率电子显微镜显示,纳米片中暴露的顶部和侧面暴露面分别对应于{001}和{100}。优化的催化剂 BNOF-M4 表现出优异的析氢和光降解活性,分别是传统固相样品 (BNOF-S) 的 129 倍和 15.6 倍。进一步的物理表征表明,尽管 BNOF-S 显示出更长的载流子寿命,但 BNOF-M4 活性的增强可能归因于其更大的比表面积、更好的表面亲水性和有利的晶粒尺寸。比较实验进一步表明,BNOF-M4 的污染物降解活性与商用 TiO2 (P25) 的基准性能相当。这项工作介绍了一种安全可靠的制备方法,不仅可以深入探索铋基钙钛矿氟氧化合物材料,而且有望在实际应用中应用。
更新日期:2025-01-24
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
层状钙钛矿氧氟化物纳米片的温和制备和优异催化活性的探索
铋层状钙钛矿氟氧烷因其优异的光催化活性而受到广泛关注。然而,这些材料的常规合成通常依赖于氢氟酸的危险使用,这带来了相当大的风险。实现具有明确形态和出色活性的高纯度氧氟化物的温和可控合成仍然具有挑战性。在这里,我们开发了一种改进的熔盐方法来温和制备 Bi2NbO5F (BNOF-M) 和 Bi2TiO4F2 (BTOF-M) 纳米片。使用 BNOF-M 作为模型催化剂,高分辨率电子显微镜显示,纳米片中暴露的顶部和侧面暴露面分别对应于{001}和{100}。优化的催化剂 BNOF-M4 表现出优异的析氢和光降解活性,分别是传统固相样品 (BNOF-S) 的 129 倍和 15.6 倍。进一步的物理表征表明,尽管 BNOF-S 显示出更长的载流子寿命,但 BNOF-M4 活性的增强可能归因于其更大的比表面积、更好的表面亲水性和有利的晶粒尺寸。比较实验进一步表明,BNOF-M4 的污染物降解活性与商用 TiO2 (P25) 的基准性能相当。这项工作介绍了一种安全可靠的制备方法,不仅可以深入探索铋基钙钛矿氟氧化合物材料,而且有望在实际应用中应用。