Yan et al. Calcined melamine at different temperatures to prepare g-c3n4, and degraded methyl orange under visible light. The test results showed that the samples calcined at 520 ℃ had higher photocatalytic degradation efficiency than those calcined at different temperatures. In addition, it was found that when Ag was deposited on the surface of g-c3n4 as an auxiliary catalyst, its photocatalytic activity could be significantly improved.<br>
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