摘要
以三聚氰胺为前驱物经煅烧法制备g-C_(3)N_(4)光催化材料,再引入WO_(3)微晶构建Z型异质结以提升光催化活性。优化了WO_(3)的水热时间和负载比例,获得了一系列WO_(3)/g-C_(3)N_(4)光催化复合材料。结果表明,引入WO_(3)微晶后,g-C_(3)N_(4)的禁带发生了变化,成功构建了Z型异质结,从而提高了可见光催化效率。WO_(3)负载量为20%,水热时间为10 h时,所制备的WO_(3)/g-C_(3)N_(4)具有最高的光催化性能,180 min时罗丹明B的降解效率可达83%,光催化反应速率k可达0.001 min^(-1),是纯g-C_(3)N_(4)反应速率常数的2.8倍。
In order to improve the photocatalytic property,photocatalytic materials of g-C_(3)N_(4)were prepared by calcining melamine as the precursor,and microcrystals of WO_(3)were introduced to form Z-scheme heterojunction.A series of WO_(3)/g-C_(3)N_(4)photocatalytic composites were obtained by optimizing the hydrothermal time and load ratio of WO_(3).The results show that after the introduction of WO_(3),g-C_(3)N_(4)’s bandgap changed and Z-scheme heterojunction was achieved,and the catalytic efficiency under visible light was improved.When the load ratio of WO_(3)was 20%and the hydrothermal time was 10 hours,the WO_(3)/g-C_(3)N_(4)prepared had the highest photocatalytic activity of 83%for photocatalytic degradation of Rhodamine B after 180 minutes and the photocatalytic reaction rate k can reach 0.001 min^(-1),which is 2.8 times higher than pure g-C_(3)N_(4).
作者
刘成宝
马恬
夏雪晴
李冉
毛栋星
钱君超
陈志刚
LIU Chengbao;MA Tian;XIA Xueqing;LI Ran;MAO Dongxing;QIAN Junchao;CHEN Zhigang(School of Materials Science and Engineering,SUST,Suzhou 215009,China;Jiangsu Key Laboratory for Environment Functional Materials,Suzhou 215009,China)
出处
《苏州科技大学学报（自然科学版）》
2021年第3期37-42,共6页
Journal of Suzhou University of Science and Technology（Natural Science Edition）
基金
江苏省自然科学基金项目(BK20180103,BK20180971)
江苏省高校自然科学基金项目(16KJA430008)
苏州市科技发展计划项目(SYG201742,SYG201818)
苏州市微纳光电材料与传感器重点实验室项目(SZS201812)。
