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具有增强电荷分离和氧吸附性能的焦脱镁叶绿酸-a/(001)TiO纳米复合材料用于高效可见光降解莠灭净

Pyropheophorbide-a/(001) TiO Nanocomposites with Enhanced Charge Separation and O Adsorption for High-Efficiency Visible-Light Degradation of Ametryn.

作者信息

Liu Songtao, Yan Rui, Humayun Muhammad, Zhang Huanli, Qu Yang, Jin Yingxue

机构信息

Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin 150025, China.

Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, School of Optical & Electronics Information, Huazhong University of Science & Technology, Wuhan 430074, China.

出版信息

Molecules. 2022 Aug 30;27(17):5576. doi: 10.3390/molecules27175576.

DOI:10.3390/molecules27175576
PMID:36080345
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9458040/
Abstract

It is highly desired to enhance charge separation and O adsorption of the pyropheophorbide-a (Ppa) to promote visible-light activity and stability. Herein, Ppa modified 001-facet-exposed TiO nanosheets (Ppa/001T) nanocomposites with different weight ratios were fabricated via the self-assembly approach by OH induced. Compared with the bare Ppa, the 8% amount optimized 8Ppa/001T sample displayed 41-fold enhanced activity for degradation of Ametryn (AME) under visible-light irradiation. The promoted photoactivities could be attributed to the accelerated charge carrier's separation by coupling TiO as thermodynamic platform for accepting the photoelectrons with high energy from Ppa and the promoted O adsorption because of the residual fluoride on TiO. As for this, a distinctive two radicals (•O and •OH) involved pathway of AME degradation is carried out, which is different from the radical pathway dominated by •O for the bare Ppa. This work is of utmost importance since it gives us detailed information regarding the charge carrier's separation and the impact of the radical pathway that will pave a new approach toward the design of high activity visible-light driven photocatalysts.

摘要

迫切需要增强焦脱镁叶绿酸-a（Ppa）的电荷分离和氧吸附，以提高可见光活性和稳定性。在此，通过OH诱导的自组装方法制备了不同重量比的Ppa修饰的暴露001面的TiO纳米片（Ppa/001T）纳米复合材料。与裸Ppa相比，8%用量优化的8Ppa/001T样品在可见光照射下对莠灭净（AME）的降解活性提高了41倍。光活性的提高可归因于通过将TiO作为热力学平台与Ppa耦合来接受高能光电子从而加速了电荷载流子的分离，以及由于TiO上残留的氟化物而促进了氧吸附。据此，开展了一条独特的涉及两个自由基（•O和•OH）的AME降解途径，这与裸Ppa以•O为主导的自由基途径不同。这项工作至关重要，因为它为我们提供了有关电荷载流子分离以及自由基途径影响的详细信息，这将为设计高活性可见光驱动光催化剂开辟一条新途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/b4e121515230/molecules-27-05576-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/b4e0577174c9/molecules-27-05576-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/9e9b06557355/molecules-27-05576-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/431ce271da91/molecules-27-05576-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/db07cb9b041f/molecules-27-05576-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/44e3d4cd6a06/molecules-27-05576-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/e657e05c50ca/molecules-27-05576-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/0b3c10b49fc4/molecules-27-05576-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/908155747a66/molecules-27-05576-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/b4e121515230/molecules-27-05576-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/b4e0577174c9/molecules-27-05576-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/9e9b06557355/molecules-27-05576-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/431ce271da91/molecules-27-05576-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/db07cb9b041f/molecules-27-05576-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/44e3d4cd6a06/molecules-27-05576-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/e657e05c50ca/molecules-27-05576-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/0b3c10b49fc4/molecules-27-05576-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/908155747a66/molecules-27-05576-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29a7/9458040/b4e121515230/molecules-27-05576-sch002.jpg

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