Conjugated polymers S-scheme homojunction with large internal electric field and matching interface for efficient visible light photocatalytic degradation of ciprofloxacin
Conjugated polymers S-scheme homojunction with large internal electric field and matching interface for efficient visible light photocatalytic degradation of ciprofloxacin
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DOI：
10.1016/j.jclepro.2023.138199
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发表时间：
2023-07
影响因子：
11.1
通讯作者：
Mingjuan Zhang;Lin Tang;Yuan Zhu;Yi Zhang;Junli Liu;Jiajia Wang;Chengyang Feng;Lu Qiao
中科院分区：
文献类型：
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作者：
Mingjuan Zhang;Lin Tang;Yuan Zhu;Yi Zhang;Junli Liu;Jiajia Wang;Chengyang Feng;Lu Qiao
鉴于对可再生能源和可持续环境技术的迫切需求和广阔前景，基于涡轮机的涡轮机是一种越来越有吸引力的前沿技术。本文通过静电自组装中空管状g-C3 N4（PCN）和缺氮硼掺杂g-C3 N4纳米片（BCNx）制备了共轭聚合物S型同质结。以典型抗生素环丙沙星（CIP）的光催化降解为研究对象，验证了PCN/BCNx的光催化降解性能。通过DFT计算和Kelvin探针力显微镜等技术验证了S-模式电荷转移的途径。PCN/BCNxS-方案同质结的特点是有效分离载体，而不损害其氧化还原电位。PCN/BCN 3的内电场强度分别是PCN的2.34倍和BCN 3的1.40倍。考虑到独特的S-方案载流子转移路线和增强的IEF强度，在可见光照射下，PCN/BCN 3中的CIP降解率最高（94.9%）。速率常数（0.0251 min-1）分别是BCN 3的2.1倍和PCN的3.8倍。此外，化学捕集实验和ESR结果的基础上，阐明了活性氧物种的CIP降解。合成了具有较大IEF和匹配界面的共轭聚合物S型同质结，用于处理抗生素污染的沃茨。
Given the urgent demand and broad prospects for renewable energy and sustainable environmental technologies, the semiconductor-based photocatalysis represents an increasingly attractive frontline technique. Herein, a conjugated polymers S-scheme homojunction was prepared by electrostatic self-assembling the hollow tubular g-C3N4(PCN) and nitrogen deficient boron doped g-C3N4nanosheets (BCNx). The photocatalytic removal of the typical antibiotic ciprofloxacin (CIP) was conducted to verify the performance of PCN/BCNx. The pathway of S-scheme charge transfer was validated through the techniques, such as DFT calculations and Kelvin probe force microscope. The PCN/BCNxS-scheme homojunction features the efficient separation of carriers without compromise their redox potentials. The internal electric field (IEF) intensity of PCN/BCN3was 2.34 times that of PCN and 1.40 times that of BCN3. Given the credit to the unique S-scheme carriers transfer route and the enhanced IEF intensity, under visible light illumination, the tallest CIP degradation percentage (94.9%) was gained in PCN/BCN3. The rate constants (0.0251 min−1) were 2.1 times that of BCN3and 3.8 times that of PCN, respectively. Furthermore, the reactive oxygen species for CIP degradation was clarified based on chemical trapping experiment and ESR results. The conjugated polymers S-scheme homojunction with large IEF and matching interface was synthesized in the current study for treating antibiotics polluted waters.