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将SrTi O_3、g-C_3N_4与Bi(NO_3)_3·5H_2O混合煅烧制备了SrTi O_3/g-C_3N_4/Bi_2O_3复合物。对其结构形貌进行了表征,研究了硝酸铋的加入量对样品结构和光催化性能的影响。结果表明:制备的复合物存在异质结结构,降低了光生电子和空穴的复合率,提高了可见光催化活性。当SrTi O_3、g-C_3N_4与Bi(NO_3)_3·5H_2O质量比为4:6:1时,制备的复合物在可见光照射30 min内对NO的去除率达到53.2%。
SrTi O 3 / g-C 3 N 4 / Bi 2 O 3 composites were prepared by calcining SrTi O 3, g-C 3 N 4 and Bi (NO 3) 3 · 5H 2 O. The structure and morphology of the samples were characterized. The effects of bismuth nitrate addition on the structure and photocatalytic activity of the samples were investigated. The results show that the prepared composite has a heterojunction structure, which reduces the recombination rate of photogenerated electrons and holes and improves the visible light catalytic activity. When the mass ratio of SrTi O 3, g-C 3 N 4 and Bi (NO 3) 3 · 5H 2 O was 4: 6: 1, the NO removal efficiency reached 53.2% within 30 min of visible light irradiation.