茎秆模板诱导合成g-C3N4/C及其光催化降解四环素研究
Synthesis of g-C3N4/C induced by stem template and photocatalytic degradation of tetracycline
徐杨 1刘成宝 2曹一达 1郑磊之 2陈丰 2钱君超 2邱永斌 3孟宪荣 4陈志刚2
作者信息
- 1. 苏州科技大学江苏省环境功能材料重点实验室,江苏苏州 215009;苏州科技大学材料科学与工程学院,江苏苏州 215009
- 2. 苏州科技大学江苏省环境功能材料重点实验室,江苏苏州 215009;苏州科技大学材料科学与工程学院,江苏苏州 215009;江苏水处理技术与材料协同创新中心,苏州科技大学苏州 215009
- 3. 江苏省陶瓷研究所有限公司,江苏宜兴 214221
- 4. 苏州市环境科学研究所,江苏苏州 215007
- 折叠
摘要
为解决残留在环境中的抗生素给生物带来的巨大危害和潜在威胁,以芦蒿茎秆(较高的纤维素含量)和豆芽茎秆(较低的纤维素含量)作为生物模板,利用茎秆表面凹凸不平的结构作为微反应空间来控制局部双氰胺量并作为结晶晶核,诱导合成薄片状石墨相氮化碳(g-C3N4),并考察其光催化降解四环素性能.通过X射线衍射、扫描电子显微镜、透射电子显微镜和荧光光谱测试等方法对材料进行了表征,结果表明g-C3N4成功负载在生物炭基体的表面,并且薄片状g-C3N4在生物炭基上分散性较高、团聚体相较低.在模拟可见光照射30 min下,茎秆模板和双氰胺质量比为1∶2时合成的g-C3N4/C对四环素(TC)表现出了较好的的降解效率,分别为31.7％和26.1％.循环四次后,ACN-2对TC的降解效率从31.7％下降到27.2％,表明材料的光催化循环稳定性良好.
Abstract
To solve the great harm and potential threat caused by antibiotics left in the environment,Artemisic stalk(high cellulose content)and bean bud(low cellulose content)stalk were used as biological templates to synthesis g-C3N4/C photocatalytic materials.The uneven structure of the stem surface was used as a micro-reac-tion space to control the amount of local dicyandiamide and as a crystalline nucleus to induce the synthesis of sheet graphite phase carbon nitride(g-C3N4)and the photocatalytic degradation of tetracycline was investigated.The material was characterized by X-ray diffraction,scanning electron microscopy,transmission electron mi-croscopy and fluorescence spectroscopy.The results showed that g-C3N4 was successfully loaded on the surface of biochar matrix,and the dispersion of g-C3N4 on biochar matrix is higher and the agglomeration is lower.Un-der simulated visible light irradiation for 30 min,g-C3N4/C synthesized at the mass ratio of stem template to di-cyandiamide 1∶2 showed highest degradation efficiency for tetracycline(TC),which was 31.7％and 26.1％,re-spectively.After four cycles,the TC degradation efficiency of ACN-2 decreased from 31.7％to 27.2％,indica-ting the good photocatalytic cycle stability of the material.
关键词
生物模板/石墨相氮化碳/光催化/四环素Key words
biological template/graphitic carbon nitride/photocatalytic/tetracycline引用本文复制引用
基金项目
江苏省自然科学基金(BK20180103)
江苏省自然科学基金(BK20180971)
苏州市科技发展计划(民生科技-关键技术应用研究)(SS202036)
出版年
2024
NETL
NSTL
万方数据