CHEMOSPHERE
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2022
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IF 8.943
Liangdi Zhu,Yuxing Zhou,Lingyun Fei,Xunlong Cheng,Xixi Zhu,Lanqing Deng,Xin Ma
CuO/Fe 3 O 4 /GO, as a Z-scheme heterojunction catalyst, was successfully synthesized and used as a photocatalyst for removing tetracycline from aqueous solution. The CuO/Fe 3 O 4 /GO heterogeneous catalyst combines the narrow bandgap semiconductor CuO, oxygen vacancies of Fe 3 O 4 , and oxygen-containing reaction sites of GO. Without the addition of activators (persulfate or H 2 O 2 ), the photocatalytic performance on decomposing tetracycline is very excellent. Compared with GO, Fe 3 O 4 , and CuO, CuO/Fe 3 O 4 /GO exhibits superior photocatalytic performance. Under visible light radiation , CuO/Fe 3 O 4 /GO generates h + and ⋅O 2 − , which are the mainly responsible active groups for TC degradation . The effects of various pH, catalysts, and reuse on the degradation performance are evaluated, and the optimal conditions for CuO/Fe 3 O 4 /GO removal of tetracycline are obtained at pH 7, catalyst dosage 20 mg⋅L −1 , TC at a concentration of 30 mg/L, nearly 97.3% of tetracycline is decomposed. This study has great potential in the treatment of wastewater containing various antibiotics.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Tianyi Sun,Zhiwei Zhao,Zhijie Liang,Jie Liu,Wenxin Shi,Fuyi Cui
A bifunctional CuO-Fe 3 O 4 material was synthesized and employed for the photocatalytic degradation of p-arsanilic acid (p-ASA) under visible light irradiation and simultaneous removal of the released inorganic arsenic by adsorption from solution. The effects of major factors, including solution pH, bicarbonate ion, halide ion and humic acid , on the p-ASA degradation were investigated. Under various water quality conditions, an excellent removal of p-ASA could always be achieved by the CuO-Fe 3 O 4 photocatalytic process and p-ASA could be completely converted to As(V) within 36 min. Simultaneously, the released As(V) could be adsorbed onto the surface of CuO-Fe 3 O 4 nanoparticles with high efficiency above 95% at initial pH range from 4 to 7. The presence of humic acid significantly weakened the degradation of p-ASA by scavenging OH, and slightly inhibited the As(V) removal. On the basis of the UV–vis, FTIR, XPS analysis and the major degradation products detected, the mechanism of the p-ASA photocatalytic degradation and the released As(V) adsorption by CuO-Fe 3 O 4 nanoparticles was given, and the degradation pathway of p-ASA during the photocatalytic process was also taken into consideration. Combined with the photocatalytic property and the high adsorption capacity of As(V), the synthesized magnetic CuO-Fe 3 O 4 nanoparticles have significant potential applications for controlling the risk of p-ASA in wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2015
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IF 5.33
Yang Lei,Chuh-Shun Chen,Yao-Jen Tu,Yao-Hui Huang,Hui Zhang
Magnetic CuO-Fe3O4 composite was fabricated by a simple hydrothermal method and characterized as a heterogeneous catalyst for phenol degradation. The effects of pH and bicarbonate ions on catalytic activity were extensively evaluated in view of the practical applications. The results indicated that an increase of solution pH and the presence of bicarbonate ions were beneficial for the removal of phenol in the CuO-Fe3O4 coupled with persulfate (PS) process. Almost 100% mineralization of 0.1 mM phenol can be achieved in 120 min by using 0.3 g/L CuO-Fe3O4 and 5.0 mM PS at pH 11.0 or in the presence of 3.0 mM bicarbonate. The positive effect of bicarbonate ion is probably due to the suppression of copper leaching as well as the formation of Cu(III). The reuse of catalyst at pH0 11.0 and 5.6 showed that the catalyst remains a high level of stability at alkaline condition (e.g., pH0 11.0). On the basis of the characterization of catalyst, the results of metal leaching and EPR studies, it is suggested that phenol is mainly destroyed by the surface-adsorbed radicals and Cu(III) resulting from the reaction between PS and Cu(II) on the catalyst. Taking into account the widespread presence of bicarbonate ions in waste streams, the CuO-Fe3O4/PS system may provide some new insights for contaminant removal from wastewater.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2023
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IF 8.3
Wenjun Zhu,Xiaohua Zuo,Xiaofei Zhang,Xiangyi Deng,Deng Ding,Chunlei Wang,JunTao Yan,Xiaobo Wang,Guanghui Wang
A novel CuO–Fe 3 O 4 encapsulated in the carbon framework with abundant oxygen vacancies (CuO–Fe 3 O 4 @C) was successfully prepared by thermal conversion of Cu(OAc) 2 /Fe-metal organic framework. The as-prepared catalyst exhibited excellent peroxymonosulfate (PMS) activation performance, good recyclability and fast magnetic separation. Under optimal conditions, the added BPA (60 mg/L) could be completely removed by CuO–Fe 3 O 4 @C/PMS system within 15 min with the degradation rate constant ( k ) of 0.32 min −1 , being 10.3 and 246.2 times that in CuO/PMS (0.031min −1 ) and Fe 3 O 4 /PMS (0.0013 min −1 ) system. A deep mineralization rate of BPA (＞80%) was achieved within 60 min. The results demonstrated the synergistic effect of bimetallic clusters, oxygen vacancies and carbon framework was a key benefit for the exposure of more active sites, the electron donor capacity and the mass transfer of substrates, thereby promoting the decomposition of BPA. Capture experiments and EPR indicated that 1 O 2 was the predominant reactive oxygen species (ROSs). The degradation routes of BPA and the activation mechanism of PMS were proposed. This study offers an opportunity to develop promising MOFs-derived hybrid catalysts with tailored structures and properties for the practical application of SR-AOPs.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Nan Lu,Zhenyong Ying,Fozia Sultana,Xiaofan Zhang,Tongtong Li,Renhong Li,Benxia Li,Xiaoqing Yan
Harnessing the full solar spectrum through photothermal co-catalysis represents a transformative approach for optimizing energyconversion and advancing sustainable development. Herein, a hollow spherical Cu/CuO-Fe3O4 composite was developed as a photothermal cocatalyst for efficient hydrogen evolution. The unique hollow spherical architecture significantly enhances solar light harvesting, reduces thermal dissipation, and provides an ideal confined environment for catalytic reactions. Metallic Cu serving as the primary contributor to the LSPR effect, enabling effective light harvesting and photothermal conversion. Meanwhile, CuO, as a semiconducting oxide, contributes to charge separation and transfer, working synergistically with Fe3O4. A robust heterojunction interface between Cu, CuO, and Fe3O4 ensures efficient separation and migration of photogenerated charge carriers. This synergy, combining the LSPR effect of Cu, the photothermal properties of Fe3O4, and the catalytic functionality of CuO, results in significantly enhanced hydrogen evolution activity. Operated under an oxygen-mediated mechanism, the catalyst achieved an impressive hydrogen evolution rate of 13,371.36 μmol·gcatalyst-1·h-1 at a partial oxygen pressure of 1.0 atm. These findings underscore the potential of hollow spherical Cu/CuO-Fe3O4 composites as advanced photothermal co-catalysis as a viable pathway for next-generation clean energy applications.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）