Journal
JOURNAL OF MATERIALS SCIENCE
Volume 53, Issue 1, Pages 409-422Publisher
SPRINGER
DOI: 10.1007/s10853-017-1507-6
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Funding
- National Natural Science Foundation of China [21273080]
- Guangdong Natural Science Foundation [2014A03031 1039]
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In this paper, an efficient approach to modify graphitic carbon nitride (g-C3N4) by simple treatment using low-concentration acid under heating was developed. The obtained acidified g-C3N4 sample exhibits about fivefold improvement in the rate of H-2 evolution compared to the pristine g-C3N4. The prepared catalysts retained the framework of g-C3N4 but with enhanced separation of photogenerated charge carriers and longer lifetime as well. In addition, according to solid H-1 NMR and theoretical calculation, the formed hydrogen bond is enhanced, which can reduce the distance between g-C3N4 and water molecules effectively. The enhanced H-bonding and the formed H-bonding networks are deemed to be the main factors for the improvement of hydrogen evolution.
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