摘要
为了解决高效光催化剂的绿色快速合成方法,采用了甘露醇辅助研磨3 min,成功制备了具有高光催化活性的超薄BiOCl纳米片。研究表明,加入甘露醇后,直接研磨的BiOCl的氧原子与甘露醇的表面羟基之间发生了氢键相互作用,从而抑制了BiOCl(001)界面的生长,使纳米片更薄,更有利于光催化反应。该方法不同于以往报道的溶剂热合成法或模板法,通过简单节能的方式可以快速制备出高光催化活性的纳米材料。对加入20mg催化剂的罗丹明B(RhB,20mg/L)染料进行光辐照35min后,对照组的降解率仅为46.8%,而BiOCl-0.2、BiOCl-0.4、BiOCl-0.6的降解率则分别达到了90.6%、99.9%和96.3%,经过多次循环测试后,BiOCl-0.4仍然表现出较高的降解能力。此外,对甲基橙(MO)和环丙沙星(CIP)的催化降解也有明显的增强作用。该实验制备方法简单,可用于环境工程类专业的教学实验。
In order to solve the green rapid synthesis method of high efficiency photocatalyst,in this experiment,ultra-thin BiOCl nanosheet with high photocatalytic activity was prepared by mannitol assisted grinding with mannitol by 3 minutes.The results show that hydrogen bond interaction occurs between the oxygen atom of BiOCl prepared by direct grinding and the surface hydroxyl group of mannitol after adding mannitol.Therefore,this inhibits the growth of the BiOCl(001)interface,making the nanosheets thinner and more favorable for photocatalytic reactions.Differing from the water/solvent thermal synthesis method or template method reported in the past,this experiment can quickly prepare nanomaterials with high photocatalytic activity by a simple and energy-saving method.When the Rhodamine B(20 mg/L)dye with 20 mg catalyst is irradiated for about 35 minutes,the degradation rate of BiOCl-0 is only 46.8%,while the degradation rates of BiOCl-0.2,BiOCl-0.4 and BiOCl-0.6 are 90.6%,99.9%and 96.3%,respectively.After cyclic test,BiOCl-0.4 still shows strong degradation ability.In addition,it significantly enhances the degradation of methyl orange(MO)and ciprofloxacin(CIP).The preparation method of this experiment is simple and suitable for the teaching experiment of environmental engineering.
作者
侯建华
张兆勇
杨迅
王猛
吴佳奇
张琪凯
HOU Jianhua;ZHANG Zhaoyong;YANG Xun;WANG Meng;WU Jiaqi;ZHANG Qikai(School of Environmental Science and Engineering,Yangzhou University,Yangzhou 225000,Jiangsu,China;Jiangsu Pylon Battery Co.,Ltd.,Yangzhou 211400,Jiangsu,China;Beijing Xinfeng Aerospace Equipment Co.,Ltd.,Beijing 100854,China)
出处
《实验室研究与探索》
北大核心
2025年第5期17-20,31,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(51602281)。
关键词
光催化
氯氧化铋
有机污染物降解
教学实验
photocatalysis
bismuth oxychloride(BiOCl)
organic pollutants degradation
teaching experiment
