| 废生物质衍生碳修饰多孔石墨氮化碳异质结用于海水中氧四环素的高效光降解 |
| Waste biomass-derived carbon modified porous graphite carbon nitride heterojunction for efficient photodegradation of oxytetracycline in seawater |
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| 摘要: 以香蕉皮(BP)和尿素为原料，采用单步热处理工艺合成了一种无金属光催化剂。生物质衍生碳(BC)与多孔石墨相氮化碳(pg-C3N4)间的紧密界面效应显著增加了复合材料(pg-C3N4/BC)的比表面积，扩大了光响应范围，并提升了光诱导电子的迁移速率及光催化剂的稳定性。在可见光照射70 min后，pg-C3N4/BC降解人工海水中氧四环素(OTC)的反应速率常数为pg-C3N4的9.4倍。另外，由于光生电荷分离和转移的促进作用，pg-C3N4/BC在连续流反应过程中对OTC也具有更优异的光催化降解效果。此外，提出了一种潜在的光催化机制，以解释pg-C3N4/BC复合材料性能增强的原因。 |
| 关键词: g-C3N4 生物质碳 海水 光催化 抗生素 |
| 基金项目: 江苏省自然科学基金(No.BK20181048)和江苏省研究生科研与实践创新计划(No.SJCX22_1457)资助。 |
| Abstract: A metal - free photocatalyst was developed and synthesized through a single - step thermal treatment process involving banana peel (BP) and urea. The close interfacial connection between biomass-derived carbon (BC) and porous graphite carbon nitride (pg - C3N4) resulted in an increased specific surface area, expanded photo-response range, effective migration of photo-induced electrons, and enhanced stability. The reaction rate constant of pg-C3N4/BC for degradation oxytetracycline (OTC) in artificial seawater was 9.4 times higher than that of pristine pg-C3N4 after 70 min of visible-light illumination, and pg-C3N4/BC also performed better photocatalytic degradation on OTC in the continuous flow reaction process owing to facilitated photogenerated charge separation and transfer. Additionally, a potential photocatalytic mechanism was proposed to explain the enhanced performance of pg-C3N4/BC composites. |
| Keywords: g-C3N4 biomass carbon seawater photocatalysis antibiotic |
| 投稿时间：2023-09-25 修订日期：2024-01-24 |
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| 王闻达,麻金库,魏玉珠,马帅帅.废生物质衍生碳修饰多孔石墨氮化碳异质结用于海水中氧四环素的高效光降解[J].无机化学学报,2024,40(4):809-822. |
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