Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 13, Pages 11689-11695Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b01721
Keywords
graphitic carbon nitride; composited materials; polyoxometalates; photocatalysis; reduction of carbon dioxide
Funding
- NSFC of China [21471027, 21671034]
- National Key Basic Research Program of China [2013CB834802]
- Fundamental Research Funds for the Central Universities [2412016KJ041]
- Changbai Mountain Scholars of Jilin Province
- Foundation of Jilin Educational Committee [2016498]
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Developing a photocatalysis system for converting CO2 to valuable fuels or chemicals is a promising strategy to address global warming and fossil fuel consumption: Exploring photocatalysts with high-performance and low -,cost has been two ultimate goals toward photoreduction of CO2. Herein, noble -Metal -free polyoxometalates :(Co-4) with oxidative ability was first introduced into g-C3N4 resulted in inexpensive hybrid materials (Co-4@g-C3N4) with staggered band alignment. The staggered composited' materials show a higher activity of CO, reduction than bare g-C3N4. An optimized CO4@g-C3N4 hybrid sample exhibited a high yield (107 mu mol g(-1) h(-1)) tinder visible -light irradiation (lambda >= 420 nm), meanwhile maintaining high selectivity for CO production (94%). After 10 h of irradiation, the production of CO reached 896 mu mol g(-1). Mechanistic studies revealed the introduction of Co4 not only facilitate the charge transfer of g-C3N4 but greatly increased the surface catalytic oxidative ability. This work creatively combined g-C3N4 with oxidative polyoxometalates which provide novel insights irito 'the design of low -Cost photocatalytic materials for CO2 reduction.
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