Abstract
A water-soluble carbon nitride (WSCN) was synthesized through a molten-salt assisted thermal polymerization method. The WSCN has a remarkable red-shifted absorption and could catalytically oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) without exogenous H2O2 to produce a color reaction under λ > 470 nm light illumination. The TMB/WSCN system can be employed for colorimetric detection of ascorbic acid.
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