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Multisite photocatalytic depolymerization of lignin model compound utilizing full-spectrum light over magnetic microspheres.

ABSTRACT: Photocatalytic depolymerization is a high value-added approach for utilization of lignin. In this study, magnetic microspheres of FeCoRu@SiO2-TiO2 were synthesized by a co-precipitation method. Doping with CoOx and RuOx was used to improve the response to visible light, and doping with TiO2 was used to improve the response to ultraviolet light (λ < 380 nm). The lignin model compound depolymerization rate was >90%. The electron paramagnetic resonance results showed that the reaction occurred in two steps (aerobic phase and oxygen-free phase). Most of the O2- was produced in the first step by cleavage of C-O bonds. The second step was inhibited in an oxygen-free atmosphere. This research provides a valid method for enhancing the photocatalytic properties using full-spectrum light and exploring the lignin photocatalytic depolymerization mechanism. Further research is required to develop the catalyst properties and performance to produce radicals.

SUBMITTER: Suo C 

PROVIDER: S-EPMC10618704 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature

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Multisite photocatalytic depolymerization of lignin model compound utilizing full-spectrum light over magnetic microspheres.

Suo Chengcheng C   Li Wei W   Luo Sha S   Ma Chunhui C   Liu Shouxin S  

iScience 20231023 11

Photocatalytic depolymerization is a high value-added approach for utilization of lignin. In this study, magnetic microspheres of FeCoRu@SiO<sub>2</sub>-TiO<sub>2</sub> were synthesized by a co-precipitation method. Doping with CoO<sub><i>x</i></sub> and RuO<sub><i>x</i></sub> was used to improve the response to visible light, and doping with TiO<sub>2</sub> was used to improve the response to ultraviolet light (<i>λ</i> < 380 nm). The lignin model compound depolymerization rate was >90%. The el  ...[more]

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