Fine tuning of the face orientation of ZnO crystals to optimize their photocatalytic activity

Advanced Materials

Volumn 18, Issue 24, 2006, Pages 3309-3312

  Jang, Eue Soon ^b   Won, Jung Hee ^c   Hwang, Seong Ju ^a   Choy, Jin Ho ^a  

^a Ewha Womans University   (South Korea)

^b KT Cooperation   (South Korea)

^c Seoul National University   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYST ACTIVITY; ENERGY GAP; HYDROGEN PEROXIDE; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; ZINC OXIDE;

FIELD-EMISSION SCANNING ELECTRON MICROSCOPY (FESEM); ORGANIC POLLUTANTS; PHOTOCATALYTIC ACTIVITY; SOFT SOLUTION;

CRYSTAL STRUCTURE;

EID: 33846147647     PISSN: 09359648     EISSN: None     Source Type: Journal    
DOI: 10.1002/adma.200601455     Document Type: Article

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11. Please see Supporting Information.
12. 2 than the nanostructured ZnO compounds. However, due to the very small surface area of the microcrystalline ZnO, a quantity more than 16 times larger is required in order to have the equivalent total surface area to that of nanocrystalline ZnO. In light of this, the observed higher activity of the microcrystalline zinc oxides in the surface-area-normalized plot (not shown in the text) should be interpreted as a result of their larger quantity rather than of their intrinsic high activity. Although normalization by the total surface area makes the amount of zinc oxide on the surface identical for all the materials under investigation, the quantity of zinc oxide in the bulk becomes much larger for the microcrystalline samples than for the nanocrystalline homologues. It is well known that holes and excited electrons can be formed not only on the surface but also in the bulk, and both can take part in photocatalysis.
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