Journal
ACS CATALYSIS
Volume 3, Issue 5, Pages 912-919Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs4000624
Keywords
polyimide; photocatalysis; band structure; water splitting; dye degradation
Categories
Funding
- NSFC [21273111, 21273106]
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The electronic: band structure of a semiconductor photocatalyst intrinsically controls its level of conduction band (CB) and valence band (VB) and, thus, influences its activity for different photocatalytic reactions. Here, we report a simple bottom-up, strategy to rationally tune the band structure of graphitic carbon nitride (g-C3N4). By incorporating electron-deficient pyromellitic dianhydride (PMDA) monomer into the network of g-C3N4, the,VB position can be largely decreased and, thus, gives a strong photooxidation capability. Consequently, the modified photocatalyst shows preferential activity for water, oxidation over water reduction in comparison with g-C3N4. More strikingly, the active species involved in the photodegradation of methyl orange switches from photogenerated electrons to holes after band structure engineering. This Work may provide guidance on designing efficient polymer photocatalysts with the desirable electronic structure for specific photoreactions.
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