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3D自支撑可见光光化学纳米催化剂

3D Self-Supported Visible Light Photochemical Nanocatalysts.

作者信息

Mikaeili Fateh, Rahaman Mohammad Mahafuzur, Gouma Pelagia-Irene Perena

机构信息

Department of Materials Science and Engineering, The Ohio State University, 140 W. 19th Avenue, Columbus, OH, 43210, USA.

Department of Mechanical and Aerospace Engineering, The Ohio State University, 201 W. 19th Avenue, Columbus, OH, 43210, USA.

出版信息

Adv Sci (Weinh). 2025 May;12(19):e2502981. doi: 10.1002/advs.202502981. Epub 2025 Mar 24.

DOI:10.1002/advs.202502981
PMID:40125619
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12097112/
Abstract

This work focuses on 3D, self-supported, nanofibrous TiO structures (nanogrids) prepared using blend electrospinning. The presence of anatase and brookite phases in Cu-doped TiO nanogrids significantly enhances the photocatalytic properties of the titania system. The absorption edge in Cu-doped TiO shifts to the visible due to the narrowed bandgap and efficient separation of photogenerated charge carriers facilitated by Cu doping. The presence of the brookite phase further contributes to the enhanced performance, by reducing electron-hole recombination. A wide range of characterization techniques, including cyclic voltammetry and chronoamperometry studies which show that the Cu doped TiO₂ sample generates a significant photocurrent under visible light, are employed to elucidate the role of Cu doping in enhancing the visible light photocatalytic efficiency of TiO nanogrids, offering valuable insights for developing advanced photochemical catalysts for environmental and energy applications. The nanogrids studied here are far superior to P25 Degussa and are activated by natural sunlight and do not require a filtration system to remove nanoparticles from the water. These self-supported nanofibrous photochemical catalysts offer all the benefits of nanomaterials while suffering from none of their drawbacks.

摘要

这项工作聚焦于使用共混静电纺丝制备的三维自支撑纳米纤维TiO结构（纳米网格）。铜掺杂TiO纳米网格中锐钛矿相和板钛矿相的存在显著增强了二氧化钛体系的光催化性能。由于带隙变窄以及铜掺杂促进光生载流子的有效分离，铜掺杂TiO的吸收边缘向可见光方向移动。板钛矿相的存在通过减少电子 - 空穴复合进一步有助于性能的提升。采用了多种表征技术，包括循环伏安法和计时电流法研究，这些研究表明铜掺杂的TiO₂样品在可见光下产生显著的光电流，以阐明铜掺杂在提高TiO纳米网格可见光光催化效率中的作用，为开发用于环境和能源应用的先进光化学催化剂提供有价值的见解。这里研究的纳米网格远优于德固赛P25，并且能被自然阳光激活，不需要过滤系统从水中去除纳米颗粒。这些自支撑纳米纤维光化学催化剂具有纳米材料的所有优点，同时没有其任何缺点。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/0601c7d5aa7d/ADVS-12-2502981-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/2ec52a27a97f/ADVS-12-2502981-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/ab3305ffd1f3/ADVS-12-2502981-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/d7f10f82cea3/ADVS-12-2502981-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/8293bca2b156/ADVS-12-2502981-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/afc1b7ce55c3/ADVS-12-2502981-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/0e8801d9024a/ADVS-12-2502981-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/c1c0c5fa62b9/ADVS-12-2502981-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/22806c3e2936/ADVS-12-2502981-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/0601c7d5aa7d/ADVS-12-2502981-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/2ec52a27a97f/ADVS-12-2502981-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/ab3305ffd1f3/ADVS-12-2502981-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/d7f10f82cea3/ADVS-12-2502981-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/8293bca2b156/ADVS-12-2502981-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/afc1b7ce55c3/ADVS-12-2502981-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/0e8801d9024a/ADVS-12-2502981-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/c1c0c5fa62b9/ADVS-12-2502981-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/22806c3e2936/ADVS-12-2502981-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a37c/12097112/0601c7d5aa7d/ADVS-12-2502981-g006.jpg

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本文引用的文献

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Molecules. 2024 May 16;29(10):2347. doi: 10.3390/molecules29102347.
2
Enhanced Photo/Electrocatalytic Hydrogen Evolution by Hydrothermally Derived Cu-Doped TiO Solid Solution Nanostructures.水热法制备的铜掺杂二氧化钛固溶体纳米结构增强光催化/电催化析氢性能
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Activating Lattice Oxygen in Perovskite Oxide by B-Site Cation Doping for Modulated Stability and Activity at Elevated Temperatures.
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