多酸辅助一步合成双金属掺杂的多孔g-C3N4及染料和Cr(Ⅵ)去除研究
Polyoxometalate-assisted one-step synthesis of bimetal co-doped porous g-C3N4 for dyes and Cr(Ⅵ) removal
毛蕊馨 1王亚 2刘刚 2田苗苗 2张雁南3
作者信息
- 1. 吉林工程技术师范学院化学与工业生物工程交叉学科研究院,吉林长春 130052;吉林工程技术师范学院生物与食品工程学院,吉林长春 130052
- 2. 吉林工程技术师范学院化学与工业生物工程交叉学科研究院,吉林长春 130052;新型分子功能材料吉林省校企联合技术创新实验室,吉林长春 130052
- 3. 吉林工程技术师范学院生物与食品工程学院,吉林长春 130052
- 折叠
摘要
石墨相氮化碳(g-C3N4)由于其具有理想的微观结构和化学功能,在环境处理应用中的潜力引起了人们的广泛兴趣.本研究以多金属氧酸盐(NH4)4[Co(Ⅱ)Mo6O24H6](Co-Mo6)为前驱体,通过一种简单的一步热聚合法制备了 一系列Co和Mo共掺杂的多孔石墨相氮化碳(Co/Mo-CN).CoMo6不仅起到氧化刻蚀作用制造多孔结构,还作为双金属掺杂源.与原始石墨相氮化碳(P-CN)相比,具有比表面积大,暴露活性位点丰富,光吸收能力强,带隙窄,光生载流子分离速率快及更负的导带电位等优点.这些优点使Co/Mo-CN对多种阳离子染料的吸附能力和可见光下光催化还原Cr(Ⅵ)能力显著提高,为优化具有良好性能的石墨相氮化碳基材料开辟了一条新的途径.
Abstract
Graphitic carbon nitride(g-C3N4,denoted as CN)has gained significant attention for its poten-tial applications in treating environmental pollutants due to its unique microstructure and chemical proper-ties.In this study,porous CN co-doped with Co and Mo(Co/Mo-CN)was successfully synthesized using a convenient thermal polymerization method involving polyoxometalate precursor of(NH4)4[Co(Ⅱ)Mo6O24H6](CoMo6).The single-source precursor of CoMo6 was not only as a pore forming agent by oxi-dation etching,but also as a bimetallic doping source.Compared with pristine CN(P-CN),Co/Mo-CN possessed more advantages,such as high specific surface area,plentiful exposed active sites,extending the light absorption capability,rapid separation of photogenerated charge carriers,narrowed bandgap and more negative conduction band potential.As expected,the Co/Mo-CN exhibited a significant enhancement of adsorption ability for cationic dyes and photoreduction Cr(Ⅵ)under visible light irradiation compared to P-CN.This research opened a new pathway designing multifunctional CN-based materials.
关键词
石墨相氮化碳/多金属氧酸盐/多孔纳米结构/吸附/光催化Key words
graphitic carbon nitride/polyoxometalate/porous nanostructure/adsorption/photocatalysis引用本文复制引用
基金项目
Science and Technology Development Project of Jilin Province(YDZJ202301ZYTS313)
Doctoral Research Initiation Fund Project of Jilin Engineering(BSKJ201918)
出版年
2024
NETL
NSTL
万方数据