The composite material g-C3N4/Bi4O5I2 was synthesized and characterized. The influencing factors of photocatalytic degradation of dibutyl phthalate(DBP)in water under visible light irradiation using the as-synthesized catalyst were studied, including catalyst dosage, initial solution concentration, pH and common anion Cl-, NO-3 and SO2-4 in water. Through the analysis of degradation products, the possible degradation mechanism was proposed. The results showed that the optimum dosage of g-C3N4/Bi4O5I2 was 0.6 g/L. The higher the initial concentration in the study range, the lower the degradation rate. When the solution was neutral, the photocatalytic degradation effect of DBP in water was the best. Cl-, NO-3 and SO2-4 all inhibited the photocatalytic degradation to a certain extent. Through the analysis of the degradation products after the reaction, it is speculated that the side chain of DBP breaks first under the attack of active substances, and then continues to degrade into small molecular substances. The research results have important practical significance and reference value for the removal of phthalates in water environment. - DOI:10.3969/j.issn.1000-1565.2022.05.005可见光催化降解水中邻苯二甲酸二丁酯雷源1,刘桂随2,朱爱雪2,李牧原2,刘芃岩1(1.河北大学 生态环境学院(筹),河北 保定 071002;2.河北大学 化学与环境科学学院,河北 保定 071002)摘 要:合成了复合材料g-C3N4/Bi4O5I2,并进行了表征分析,以其为催化剂,研究了可见光照射下,水中邻苯二甲酸二丁酯(DBP)光催化降解的影响因素:催化剂投加量、溶液初始浓度、pH及水中常见阴离子Cl-、NO-3和SO2-4等,并通过对降解产物的分析,提出了可能的降解机理. 结果表明:g-C3N4/Bi4O5I2的最佳投加量为0.6 g/L;在研究范围内初始浓度越高,降解率越低;当溶液为中性时,对水中DBP的光催化降解效果最好;Cl-、NO-3和SO2-4都对光催化降解产生了一定的抑制作用. 通过对反应后降解产物的分析,推测DBP是在活性物质的攻击下,侧链先发生断裂,再继续降解为小分子物质. 研究结果对水环境中邻苯二甲酸酯类的去除具有重要的实际意义和参考价值. 关键词:可见光;邻苯二甲酸二丁酯;光催化降解;g-C3N4/Bi4O5I2中图分类号:X703 文献标志码:A 文章编号:1000-1565(2022)05-0474-09Study on visible light photocatalytic degradation of dibutyl phthalate in water LEI Yuan1, LIU Guisui2, ZHU Aixue2, LI Muyuan2, LIU Pengyan1(1. School of Eco-Environment, Hebei University, Baoding 071002,China; 2. College of Chemistry and Environmental Science, Hebei University, Baoding 071002,China)Abstract: The composite material g-C3N4/Bi4O5I2 was synthesized and characterized. The influencing factors of photocatalytic degradation of dibutyl phthalate(DBP)in water under visible light irradiation using the as-synthesized catalyst were studied, including catalyst dosage, initial solution concentration, pH and common anion Cl-, NO-3 and SO2-4 in water. Through the analysis of degradation products, the possible degradation mechanism was proposed. The results showed that the optimum dosage of g-C3N4/Bi4O5I2 was 0.6 g/L. The higher the initial concentration in the study range, the lower the degradation rate. When the solution was neutral, the photocatalytic degradation effect of DBP in water was the best. Cl-, NO-3 and SO2-4 all inhibited the photocatalytic degradation to a certain extent. Through the analysis of the degradation products after the reaction, it is speculated that the side chain of DBP breaks first under the attack of active substances, and then continues to degrade into small molecular substances. The research results have important practical significance and reference value for the removal of phthalates in water environment. - 收稿日期:2021-05-15 基金项目:国家自然科学基金资助项目(21377033);河北省自然科学基金资助项目(B2021201031) 第一作者:雷源(1997—),女,河北邢台人,河北大学在读硕士研究生,主要从事环境污染化学方向研究.E-mail:2317535846@qq.com 通信作者:刘芃岩(1964—),女,河北保定人,河北大学教授,博士生导师,主要从事环境中典型污染物的生成降解与迁移转化研究.E-mail:hbupyliu@163.com第5期雷源等:可见光催化降解水中邻苯二甲酸二丁酯
LEI Yuan
,
LIU Guisui
,
ZHU Aixue
,
LI Muyuan
,
LIU Pengyan
. Study on visible light photocatalytic degradation of dibutyl phthalate in water[J]. Journal of Hebei University(Natural Science Edition), 2022
, 42(5)
: 474
-482
.
DOI: 10.3969/j.issn.1000-1565.2022.05.005
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