Degradation and hydrogen production studies of B-doped g-C3N4 photocatalysts

B/g-C 3 N 4 was successfully prepared by thermal polymerization, and its photocatalytic performance was investigated through the degradation of methylene blue (MB) and hydrogen production. The experimental results showed that B/g-C 3 N 4 exhibited good photocatalytic performance in both MB degradation and hydrogen production. The 1% B/g-C 3 N 4 sample degraded 5 ppm MB by 97.8% in 40 min, and its degradation rate constant k was about 3 times higher than that of g-C 3 N 4 . The hydrogen production rate was 693.03 μmol g −1 h −1 , which was about 5 times higher than that of g-C 3 N 4 . The 1% B/g-C 3 N 4 sample retained most of its photocatalytic activity after five cycles. The possible degradation and hydrogen production mechanisms of B/g-C 3 N 4 were also proposed.