DataVXACS Applied Materials & InterfacesPaper
journal article·2024-05-15

Oxygen-Vacancy-Mediated Large Binding Energy Exciton Dissociation in Nb3O7(OH) Nanorods with High Electron Mobility for CO2 Photoreduction

Yongfang Jia, Juan Gao, Feng Yang, Yangmin Diao, Qijun Liu, Yong Zhang, Hongliang Sun, Min Pan, Mei Huang, Min Xu, Xuru Duan, Yong Zhao

ACS Applied Materials & Interfaces· Volume 16· Issue 19
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Source abstract

Abstract

Despite the excellent performance of Nb 3 O 7 (OH) in dye-sensitized solar cells and catalysis, its charge separation, transport, and structural properties remain poorly understood. Herein, the Nb 3 O 7 (OH) nanorods were prepared, and their structural characteristics, optoelectronic properties, and carrier mobility were also analyzed and investigated through a series of complex characterizations. Theoretical prediction suggested that the exciton binding energy of Nb 3 O 7 (OH) could be as high as 100.49 meV. The temperature-dependent photoluminescence (PL) of Nb 3 O 7 (OH) nanorods revealed two activation energies, and a higher proportion of long-lived components observed in the photoluminescence decay indicated effective electron trapping. That is, two energy states were present, hindering photogenerated charge recombination and promoting photocatalytic action. Current–voltage characteristics of the Nb 3 O 7 (OH) nanorod film were analyzed, revealing an ultrahigh carrier mobility of ∼310 cm 2 /V·s, ensuring fast and efficient electron transfer. Furthermore, Nb 3 O 7 (OH) nanorods were employed to reduce CO 2, resulting in the effective production of CO and CH 4 . Overall, considering the presence of hydroxyl pairs on the surface of Nb 3 O 7 (OH), which facilitate the formation of the frustrated Lewis acid–base pairs and the activation of CO 2, together with its effective electron trapping and charge transport, give Nb 3 O 7 (OH) nanorods a promising potential for CO 2 reduction.
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Research context

NanomaterialsElectronic materialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Perovskite Materials and Applications · Ga2O3 and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Advanced Technology of Materials (Ministry of Education of China), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Department of Electromechanical Engineering, Sichuan Engineering Technical College, Deyang, Sichuan 618000, China

Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle (Ministry of Education of China), School of Electrical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China

Southwestern Institute of Physics, Chengdu 610041, China

Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian 350117, China

Funding

Southwest Jiaotong University · Ministry of Education of the People's Republic of China · National Key Research and Development Program of China · National High-tech Research and Development Program · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · International Science and Technology Cooperation Programme · National Magnetic Confinement Fusion Science Program of China

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