期刊
BIOCHAR
卷 5, 期 1, 页码 -出版社
SPRINGER SINGAPORE PTE LTD
DOI: 10.1007/s42773-022-00197-4
关键词
Biochar; Tetracycline; Hexavalent chromium; Combined pollution; Synergistic photocatalytic effect
Biochar-coupled Fe3O4@SiO2/TiO2/g-C3N4 composites were successfully synthesized and exhibited excellent performance in removing high-concentration tetracycline (TC) through middotOH and middotO(2)(-) generation. The composites showed a removal rate of 91.88% within 3 hours and a degradation rate constant of 0.0068 min(-1). The outstanding performance was attributed to factors such as high specific surface area, enhanced visible light response, introduction of magnetic nanoparticles and biochars, Z-scheme heterojunction, and extraordinary adsorption capacity.
Biochar-coupled Fe3O4@SiO2/TiO2/g-C3N4 composites were successfully constructed through simple sol-gel and calcination methods. The composites efficiently removed high-concentration toxic tetracycline (TC) by means of middotOH and middotO(2)(-), whose removal rate exhibited 91.88% during 3 h, and the degradation rate constant reached up to 0.0068 min(-1). The excellent performance can be attributed to the high specific surface area, enhanced visible light response, the introduction of magnetic nanoparticles and biochars expediting charge transfer, Z-scheme heterojunction enhancing the spatial separation of photo-generate carriers and, importantly extraordinary adsorption capacity of 147.96 mg g(-1). Moreover, the composites showed the most excellent efficiency under the calcination temperature of 450 ?, and exhibited good stability with tolerance to a wide range of pH and anions. Interestingly, a synergistic photocatalytic effect was discovered in the TC/Cr(VI) combined pollution systems, resulting in significantly improved removal of Cr(VI). Besides, the photocatalytic mechanism and degradation path of tetracycline were also elucidated. All these findings suggested the as-synthesized catalyst was an excellent photocatalyst for removal of TC/Cr(VI)-contaminated water.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据