Abstract：
:Methods and mechanisms for improvement of photocatalytic activity, are important and popular research topics for renewable energy production and waste water treatment. Here, we demonstrate a facile laser drilling method for engineering well-aligned pore arrays on magnetron-sputtered WS2 nanofilms with increased active edge sites; the proposed method promotes partial oxidation to fabricate WS2/WO3 heterojunctions that enhance the separation of photogenerated electron-hole pairs. The WS2 film after one, two, and three treatments exhibited photocurrent density of 3.9, 6.2, and 8 μA/cm2, respectively, reaching up to 31 times larger than that of pristine WS2 film along with greatly improved charge recombination kinetics. The unprecedented combinational roles of laser drilling revealed in this study in regards to geometric tailoring, chemical transformation, and heterojunction positioning for WS2-based composite nanomaterials create a foundation for further enhancing the performance of other 2D transition metal dichalcogenides in photocatalysis via laser treatment.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Ma S,Zeng L,Tao L,Tang CY,Yuan H,Long H,Cheng PK,Chai Y,Chen C,Fung KH,Zhang X,Lau SP,Tsang YHdoi
10.1038/s41598-017-03254-2subject
Has Abstractpub_date
2017-06-09 00:00:00pages
3125issue
1issn
2045-2322pii
10.1038/s41598-017-03254-2journal_volume
7pub_type
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