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Application Cases | Application of EPR in Photocatalytic Material Research

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Application Cases | Application of EPR in Photocatalytic Material Research

Application of EPR in Photocatalytic Material Research

Electron paramagnetic resonance (EPR) technology is currently the only method that can directly, in-situ, and non-destructively detect unpaired electrons. EPR technology can directly detect vacancies (oxygen vacancies, nitrogen vacancies, sulfur vacancies, etc.) and doped electrons in photocatalytic materials. The valence state of heterotransition metals. In addition, EPR technology can also detect free radicals such as e-, h+, •OH, O2•-, 1O2, SO3•- generated on the surface of the photocatalyst.

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Application of EPR in Photocatalytic Material Research

Application of EPR in Photocatalytic Material Research

CN (Cu1/N2CV-CN) photocatalytic carbon dioxide reduction (1) EPR technology directly detects transition metal copper and N2C vacancies in the photocatalytic material CN; (2)EPR technology supports the analysis results of XAFS. The EPR spectrum shows three peaks corresponding to g‖ of Cu, indicating that the coordination of the Cu center with three identical N atoms is attributed to the ultra-fine interaction between Cu atoms and nearby N atoms. (3) EPR technology can detect the hydroxyl radicals generated on the surface of the photocatalyst to identify the photocatalyst performance; with the introduction of N2C vacancies, the intensity of hydroxyl radicals increases significantly, promoting the dissociation of water.

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Hefei, Anhui, China

CIQTEK Co., Ltd.

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EPR spectrometer - CIQTEK Co., Ltd.

EPR spectrometer

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