以三聚氰胺、五水合硝酸铋和碘化钾等为原料合成了一系列不同质量分数的复合催化剂Bi₅O₇I/g-C₃N₄,利用XRD、SEM、XPS和UV-Vis等手段对其进行表征。研究了不同质量分数的复合催化剂Bi₅O₇I/g-C₃N₄光催化降解盐酸四环素的活性,并对其光催化反应机理进行了探索。结果表明,所制备的Bi₅O₇I/g-C₃N₄复合催化剂具有中空结构,其禁带宽度减小,光催化效率提高;在所有样品中Bi₅O₇I/g-C₃N₄-5%催化活性最高;在降解过程中起主要作用的活性基团是超氧自由基(·O₂^-),其次是羟基自由基(·OH),作用最小的是空穴(h⁺)。

Using melamine,bismuth nitrate pentahydrate and potassium iodide as raw materials,a series of Bi₅O₇I/g-C₃N₄ composite catalysts with different mass ratios are synthesized,and characterized by XRD,SEM,XPS and UV-Vis.The photocatalytic degradation activity of Bi₅O₇I/g-C₃N₄ composite catalysts with different mass ratios is studied,and the photocatalytic reaction mechanism is explored.Results show that the prepared Bi₅O₇I/g-C₃N₄ composite catalyst has a hollow structure,its band gap is reduced,and its photocatalytic efficiency is improved.Among all samples,Bi₅O₇I/g-C₃N₄-5% has the highest catalytic activity.Active group that plays a major role in the degradation process is superoxide radical (·O₂^-),followed by hydroxyl radical (·OH).The smallest is the hole (h⁺).

汪遵盛(1996-),男,硕士研究生,研究方向为污水处理技术,1521855659@qq.com