g-C3N4纳米片/Bi5O7Br/NH2-MIL-88B (Fe)纳米复合材料的制备:具有可见光下去除抗生素性能的双s方案光催化剂

IF 5.6 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Nasrin Sedaghati, Aziz Habibi-Yangjeh, Alireza Khataee
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引用次数: 3

摘要

采用溶剂热法合成了具有双s型异质结的新型石墨氮化碳(g-C3N4)纳米片/Bi5O7Br/NH2-MIL-88B (Fe)光催化剂(记为GCN-NSh/Bi5O7Br/Fe-MOF,其中MOF为金属-有机骨架)。采用x射线光电子能谱仪(XPS)、x射线衍射仪(XRD)、扫描电镜(SEM)、能量色散x射线能谱仪(EDX)、透射电镜(TEM)、高分辨率透射电镜(HRTEM)、光致发光光谱(PL)、傅里叶变换红外光谱(FT-IR)、紫外-可见漫反射光谱(UV-Vis DRS)、光电流密度、电化学阻抗谱(EIS)、和布鲁诺尔-埃米特-泰勒(BET)分析。将Fe-MOF与GCN- nsh /Bi5O7Br整合后,最佳的GCN- nsh /Bi5O7Br/Fe-MOF纳米复合材料(15wt%)对四环素的去除率比原始GCN提高了33倍。GCN- nsh /Bi5O7Br/Fe-MOF (15wt%)纳米复合材料对阿奇霉素、甲硝唑和头孢氨苄的去除率分别是纯GCN的36.4倍、20.2倍和14.6倍。自由基猝灭试验表明,·O−2和h+对消除反应起主要作用。此外,在连续4次循环后,纳米复合材料仍保持良好的活性。基于n-GCN-NSh、n-Bi5O7Br和n-Fe-MOF半导体之间形成的n-n异质结,提出了双S-scheme电荷转移机制来破坏所选抗生素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fabrication of g-C3N4 nanosheet/Bi5O7Br/NH2-MIL-88B (Fe) nanocomposites: Double S-scheme photocatalysts with impressive performance for the removal of antibiotics under visible light

Novel graphitic carbon nitride (g-C3N4) nanosheet/Bi5O7Br/NH2-MIL-88B (Fe) photocatalysts (denoted as GCN-NSh/Bi5O7Br/Fe-MOF, in which MOF is metal-organic framework) with double S-scheme heterojunctions were synthesized by a facile solvothermal route. The resultant materials were examined by X-ray photoelectron spectrometer (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence spectroscopy (PL), Fourier transform infrared spectroscopy (FT-IR), UV-Vis diffuse reflection spectroscopy (UV-vis DRS), photocurrent density, electrochemical impedance spectroscopy (EIS), and Brunauer–Emmett–Teller (BET) analyses. After the integration of Fe-MOF with GCN-NSh/Bi5O7Br, the removal constant of tetracycline over the optimal GCN-NSh/Bi5O7Br/Fe-MOF (15wt%) nanocomposite was promoted 33 times compared with that of the pristine GCN. The GCN-NSh/Bi5O7Br/Fe-MOF (15wt%) nanocomposite showed superior photoactivity to azithromycin, metronidazole, and cephalexin removal that was 36.4, 20.2, and 14.6 times higher than that of pure GCN, respectively. Radical quenching tests showed that ·O 2 and h+ mainly contributed to the elimination reaction. In addition, the nanocomposite maintained excellent activity after 4 successive cycles. Based on the developed n–n heterojunctions among n-GCN-NSh, n-Bi5O7Br, and n-Fe-MOF semiconductors, the double S-scheme charge transfer mechanism was proposed for the destruction of the selected antibiotics.

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来源期刊
CiteScore
9.30
自引率
16.70%
发文量
205
审稿时长
2 months
期刊介绍: International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.
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