探索新型2D/1D-NiFe2O4/Bi2O4杂化光催化剂对亚甲基蓝的高效降解

IF 2 3区化学 Q4 CHEMISTRY, PHYSICAL

Chemical Physics Pub Date : 2025-01-23 DOI:10.1016/j.chemphys.2025.112618

Parthasarathy Sasikala , Jagannathan Madhavan , Thirugnanam Bavani , Mani Preeyanghaa , Bernaurdshaw Neppolian

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引用次数: 0

摘要

一种很有前途的可见光驱动光催化剂Bi2O4具有宽带光谱响应范围。然而，光生成的e - /h+对的快速重组严重阻碍了裸Bi2O4的光催化活性。反尖晶石结构的NiFe2O4光催化活性较低，但具有铁磁性和良好的化学稳定性。这些特性促使制备了NiFe2O4/Bi2O4复合材料。采用一锅水热法制备了不同掺量的NiFe2O4/Bi2O4复合材料。优化后的NiFe2O4/Bi2O4纳米复合材料在可见光照射60 min后对亚甲基蓝（MB）的光催化降解效率达到94%。回收实验和自由基捕获实验表明，优化后的NiFe2O4/Bi2O4复合材料具有高度的稳定性，并保证了活性物质O2•−和•OH的光催化降解能力。在此基础上，提出了NiFe2O4/Bi2O4复合材料在模拟VLI条件下光催化分解MB的合理机理。

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Exploring superior photocatalytic behaviour of novel 2D/1D-NiFe2O4/Bi2O4 hybrid photocatalyst for efficacious degradation of methylene blue

A promising visible-light driven photocatalyst Bi₂O₄ possess broadband spectral response range. Nevertheless, the speedy recombination of photogenerated e⁻/h⁺ pairs of bare Bi₂O₄ highly hampers its photocatalytic activities. An inverse spinel structure NiFe₂O4 has lesser photocatalytic activities but it owns ferromagnetic nature and virtuous chemical stability. These properties instigates to fabricate NiFe₂O₄/Bi₂O₄ composite. A series of NiFe₂O₄/Bi₂O₄ composites are obtained by distinct amount of NiFe₂O₄, via one-pot hydrothermal route. The optimized NiFe₂O₄/Bi₂O₄ nanocomposite contributed to an excellent photocatalytic degradation efficiency of 94 % for methylene blue (MB) under visible light irradiation after 60 min. The recycling experiment and radical trapping tests specified that the optimized NiFe₂O₄/Bi₂O₄ hybrid has highly stable and ensured the prominent capacity of the active species O₂^•− and ^•OH for photocatalytic degradation respectively. On the basis of above observations, a plausible mechanism of NiFe₂O₄/Bi₂O₄ composite towards the photocatalytic decomposition of MB under simulated VLI has been presented.

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.