Journal
JOURNAL OF CATALYSIS
Volume 339, Issue -, Pages 93-101Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2016.03.021
Keywords
Graphitic carbon nitride; Dye; Methyl orange; Broad spectral responsive range; Hydrogen evolution
Categories
Funding
- National Natural Science Foundation [51172187]
- SPDRF of MOE [20116102130002]
- 111 Program of MOE [B08040]
- Xi'an Science and Technology Foundation [CXY1510-2]
- Fundamental Research Funds for the Central Universities of China [3102014JGY01004]
- NPU
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The precursor of carbon nitride pretreated with dye sensitization (methyl orange) before condensation would possess a spectral response of the resultant product extended even to the near-infrared range. The color of the products, in this case, can be delicately controlled by the amount and kind of dyes, so the process is termed dyeing. Their corresponding absorption edge would reach 560 and 675 nm after introduction of 0.05 and 0.15 g dye, respectively. It is assumed that the chromophores and auxochromes that impart color to the molecules are introduced into the pi-conjugated system and also extend delocalization. The highest hydrogen evolution rate of the dyed carbon nitride reached 470 mu mol/g h, compared with an increase by a factor of 1.7 for bulk carbon nitride. This new concept of dyeing will inspire further investigation on developing broad spectral light-responsive photocatalysts for hydrogen production. (C) 2016 Elsevier Inc. All rights reserved.
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