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Issue 45, 2017
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Generation of Image ID:c7ta08117k-t1.gif defect clusters for 1O2 production for molecular oxygen activation in photocatalysis

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Abstract

Defect engineering on a semiconductor surface can provide coordinatively unsaturated sites for molecular oxygen activation in photocatalysis. In this work, we demonstrated that the vacancy type was key to modulate the molecular oxygen activation process on BiOBr nanosheets. By regulating the reaction time, an oxygen vacancy Image ID:c7ta08117k-t3.gif, a double atom defect cluster Image ID:c7ta08117k-t4.gif and triple atom clusters Image ID:c7ta08117k-t5.gif were accordingly generated on the surface, subsurface and bulk of BiOBr. More importantly, the newly-discovered Image ID:c7ta08117k-t6.gif defect cluster was highly related to the singlet oxygen (1O2) production ability of BiOBr. Meanwhile, the excellent photocatalytic selective oxidation reactions were successfully realized over BiOBr with the Image ID:c7ta08117k-t7.gif defect cluster. In addition, time-dependent defect cluster generation and the associated molecular oxygen activation were discussed.

Graphical abstract: Generation of defect clusters for 1O2 production for molecular oxygen activation in photocatalysis

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Publication details

The article was received on 14 Sep 2017, accepted on 24 Oct 2017 and first published on 25 Oct 2017


Article type: Communication
DOI: 10.1039/C7TA08117K
Citation: J. Mater. Chem. A, 2017,5, 23453-23459
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    Generation of Image ID:c7ta08117k-t1.gif defect clusters for 1O2 production for molecular oxygen activation in photocatalysis

    J. Ding, Z. Dai, F. Tian, B. Zhou, B. Zhao, H. Zhao, Z. Chen, Y. Liu and R. Chen, J. Mater. Chem. A, 2017, 5, 23453
    DOI: 10.1039/C7TA08117K

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