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Enhanced N 2 photofixation activity of flower-like BiOCl by in situ Fe(III) doped as an activation center

Journal of Colloid and Interface Science, ISSN: 0021-9797, Vol: 584, Page: 174-181
2021
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Article Description

Photocatalytic nitrogen fixation has been considered to be a safe, green, eco-friendly, and sustainable technology. However, photoinduced activation of inert dinitrogen is an important factor hindering the development of this technology. Herein, in-situ Fe 3+ doped flower-like BiOCl with highly active sites exposure was prepared by a solvent thermal method, which has excellent performance of N 2 photofixation. Compared with virgin BiOCl with no nitrogen fixation activity, Fe-BiOCl reached 30 μmol·L −1 ·h −1 ammonia evolution rate under simulated sunlight without any sacrificial reagent. Characterization results demonstrated that the enhancement of N 2 photofixation capacity was mainly attributed to the in-situ doped Fe 3+ in BiOCl, the doped Fe 3+ not only acts as a reaction center for N 2 activation also as an “electron transfer bridge” trapping and migrating electrons from BiOCl to N 2 molecules. Furthermore, the transformation of crystal facets from virgin BiOCl (0 0 1) to Fe-BiOCl (1 1 0) and (1 0 2) is more conducive for the exposure and accessibility of iron reactive sites. This work developed a potential strategy by in-situ introducing Fe 3+ active sites in BiOCl semiconductor substrate, which establishes a good basis for the application of semiconductor catalysts in nitrogen fixation.

Bibliographic Details

Shen, Zhengfeng; Li, Feifei; Lu, Jiangrui; Wang, Zhidan; Li, Rui; Zhang, Xiaochao; Zhang, Changming; Wang, Yawen; Wang, Yunfang; Lv, Zhiping; Liu, Jianxin; Fan, Caimei

Elsevier BV

Materials Science; Chemical Engineering

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