MICROPOROUS AND MESOPOROUS MATERIALS
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2021
·
IF 5.455
Bing Chen,Yanhui Li,Meixiu Li,Mingfei Cui,Wenshuo Xu,Liubo Li,Yaohui Sun,Mingzhen Wang,Yang Zhang,Kewei Chen
By improving the synthesis process of MOF-525, MOF-525 was grown on the surface of graphene oxide (GO), and thus the MOF-525/GO composite was obtained for the adsorption of tetracycline (TC) in water. MOF-525 and GO can be identified on the surface of MOF-525/GO, and the BET surface area measured is up to 444.49 m 2 g −1 . MOF-525 and GO are bonded by coordination bonds, and the lattice structure of MOF-525 is retained in the composite. Both GO and MOF-525 have good adsorption properties, the maximum adsorption capacity is 236.7 mg g −1 and 371.5 mg g −1 , respectively. The maximum adsorption capacity of MOF-525/GO reaches 413.6 mg g −1 , indicating that GO does not weaken the adsorption performance of MOF-525, but further strengthens. The initial adsorption rate of MOF-525/GO for TC was very fast (the adsorption removal rate reached 47% within 2 min), and the adsorption removal amount is almost unchanged after 360 min. Elovich model and Sips model fitted the adsorption process well, revealing that the adsorption process was exothermic reaction dominated by chemisorption and the maximum adsorption capacity was 436 mg g −1 . In addition, MOF-525/GO carries a negative charge, and the adsorption performance gradually decreases with the increase of pH value. The adsorption capacity of MOF-525/GO was mainly derived from π-π stacking and hydrogen bonding , and the complexation between Zr and TC was also involved in the rapid adsorption stage.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 25
·67647-67661
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IF 5.8
Zhang Xiansheng,Liu Zhifeng,Shao Binbin,Wu Ting,Pan Yuan,Luo Songhao,He Miao,Ge Lin,Sun Jingwen,Cheng Chunyun,Huang Jian
Zirconium-based porphyrin metal organic frameworks (Zr-PMOFs) had attracted attention in the field of photocatalysis in recent years. However, the recombination of photogenerated carriers of monomer PMOF limits its performance of photocatalytic organic pollutants degradation. Metal sulfide has a suitable visible band gap, which can form a heterojunction with MOF materials to enhance the photocatalytic efficiency of MOF. Therefore, a typical metal sulfide semiconductor ZnIn 2 S 4 (ZIS) was introduced into a Zr-MOF (MOF-525) by solvothermal method to prepare a series of ZIS/MOF-525 (ZIS/MOF-525–1, ZIS/MOF-525–2, ZIS/MOF-525–3 and ZIS/MOF-525–4) composite photocatalysts in this work. The results of characterization analysis, optical analysis and electrochemical analysis showed that the interface of ZIS/MOF-525 formed a typical type-II heterojunction, which accelerated the electron transport rate and effectively inhibited the recombination of photogenerated e − and h + in MOF-525. The optimal removal efficiency of tetracycline (TC) by ZIS/MOF-525–3 (the mass of MOF-525 is 30 mg) reached 93.8% under 60 min visible light illumination, which was greater than that of pure MOF-525 (37.2%) and ZnIn 2 S 4 (70.0%), and it still maintained good stability after five cycles reusing experiment. This work provides feasible insight for the preparation of novel and efficient PMOF-based photocatalysts in the future.
研究领域:
材料科学
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环境科学
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化学
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光催化
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2022
·Vol. 12
·期 6
·671
·
IF 4.501
Chenhui Qi,Shuaipeng Han,Jialiang Lin,Jianhua Cheng,Kesi Du,Yongyou Hu,Yuancai Chen
Photoelectro-Fenton (PEF) process can continuously promote the occurrence of Fenton reaction and the generation of active species, which is an advanced oxidation technology for pollutant degradation. However, the lack of bifunctional catalysts restricts the development of PEF technology. In this study, the electronic rearrangement MOF-525 modified by metalloporphyrin (named MOF-525-Fe/Zr) was prepared, to load on the carbon felt as a novel cathode catalyst, which is used in PEF process. A series of characterization and photoelectric chemical properties tests combined with DFT calculation showed that the modification of MOF-525 could not only have the large specific surface area and multistage pore structure but also co-stimulate the metal-to-ligand charge transfer (MLCT) and ligand-to-cluster charge transfer (LCCT) by photoelectric synergy. These charge transitions provide periodic electron donor-acceptor conduction paths in MOF-525-Fe/Zr, which can improve the active species formation and transfer efficiency. Owing to their favorable pore and electronic structure as well as stability, MOF-525-Fe/Zr shows great promise for the application in the catalytic process of PEF. Sulfamethoxazole (SMX) degradation was enhanced by MOF-525-Fe/Zr with the TOC removal rate above 75% both in river water and tap water. Finally, the reasonable pathway of PEF catalytic degradation of SMX was proposed by HPLC-MS analysis. In conclusion, this study provides a new idea for reconstructing the electronic structure of MOFs catalyst and broadening the practical application of PEF technology.Keywords:photoelectro-Fenton;MOF-525;metal-to-ligand charge transfer;ligand-to-cluster charge transfer;sulfamethoxazole
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
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yunpeng Zhou,Jing Wang,Jiawei Yang,Long-Hui Duan,Hai-Bo Liu,Junfei Wu,Lina Gao
SBA-15@MOF-525 composites were constructed by in situ self-assembly of a metal–organic framework (MOF-525) with mesoporous SBA-15 silica. MOF-525 crystals were confined inside the mesopores as well as grown on the outside surface of SBA-15, under the impact of the structure-directing role of SBA-15, and the composites exhibited both microporous and mesoporous characteristics. In general, the adsorption of tetracycline (TC) on MOF-525 was affected by pH. The adsorption capacity of MOF-525 decreased rapidly, especially in an alkaline environment, due to the collapse of the MOF-525 skeleton. By contrast, incorporating MOF-525 into SBA-15 improved the stability of MOF-525. The adsorption of TC on SBA-15@MOF-525 was almost unaffected by pH. High and stable adsorption capacity over a wide pH range was maintained under acidic, neutral, and alkaline environments. The composites were used effectively for TC adsorption. The maximum adsorption capacity of TC on SBA-15@MOF-525 was 690 mg/g, which is higher than that of most of the reported adsorbents. The great potential of SBA-15@MOF-525 in practical applications was demonstrated by investigating the adsorption of TC in lake water samples.
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
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jing Xia,Yanxin Gao,Gang Yu
The adsorptive removal of tetracycline (TC) was studied with three types of zirconium-based metal–organic frameworks (Zr-MOFs), UiO-66, NU-1000 and MOF-525. The adsorption kinetics best fitted with the pseudo-second-order kinetic model and the adsorption equilibrium was rapidly reached within 40 min on UiO-66 and NU-1000, and 120 min on MOF-525. The adsorption isotherms best fitted with Sips model, and the maximum Sips adsorption capacities of TC on UiO-66, NU-1000 and MOF-525 were 145 mg·g −1 , 356 mg·g −1 and 807 mg·g −1 respectively, which were much higher than common adsorbents. The X-ray photoelectron spectra measurements and the influence of pH suggested that the π-π interaction played a crucial role during the adsorption. Pore characteristics and topology of MOFs showed great effect on adsorption performance. The cages whose size match well with TC helped MOF-525 to get highest adsorption amount per surface area among MOFs we studied. The proper topology of NU-1000 contributed to its high adsorption rate. River water was also used to confirm the excellent adsorptive performance of these three Zr-MOFs in practical application. These results might aid us to comprehend the adsorption of TC on Zr-MOFs and expand the application of Zr-MOFs in water treatment for removal of emerging contaminants.
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yujuan Cai,Jun Zhang,Yulian Wen,Zefan Zhang,Hailong Wang,Ye Yang,Zhigang Tai
As global food, it has important implications for monitoring and testing of pesticide pollution in the root and tuber crops. Herein, a novel mixed-matrix membrane based on metal–organic frameworks (MOF-525-MMM) was successfully prepared for a simplified dispersive solid-phase extraction (d-SPE) of ten kinds of pesticides in root and tuber crops. The MOF-525-MMM was well characterized and major factors affecting extraction process were systematically investigated. Under optimal conditions, the MOF-525-MMM based d-SPE coupled with GC–MS exhibited excellent linearity (R 2 ≥ 0.9947) and detection limits of 0.80–4.16 µg/L. Finally, the developed method was successfully applied to the determination of pesticides in potatoes and sweet potatoes, with recoveries in range of 65.3–92.5 % and RSDs lower than 9.8 %. In the extraction process, MOF-525-MMM exhibited excellent extraction efficiency and purified ratio. Therefore, the adsorption mechanism was studied, and the results indicated that it was attributed to the π-π stacking effect and hydrogen bond between MOF-525 and pesticides. It was demonstrated that this d-SPE-GC–MS method based on MOF-525-MMM offers great potential for efficient extraction and determination of pesticides in root and tuber crops.
研究领域:
食品科学
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分析化学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Yulu Wu,Yanning Qu,Chenyang Su,Xiufang Yang,Yuhao Yang,Yanan Zhang,Wenhuan Huang
Single-atom metal-anchored porphyrin-based metal–organic frameworks (MOFs) have shown excellent light absorption, catalytic sites, and high stability during photocatalytic reactions, while there are still challenges for facile assembly with quantum dots to enhance catalytic dynamics. Herein, a kind of Fe single atom-doped MOF material (Fe-MOF-525) was ball milled with CdS in a proper ratio through Fe–N4 and Fe–N–C bonding, which showed the enhanced photoinduced carrier separation ability. As a result, extended light absorption ranges of CdS/Fe-MOF-5252.3 induced the promotion of the photocatalytic hydrogen (H2) value (3638.6 μmol g–1 h–1), which was 7.2 and 2.3 times higher than those of Fe-MOF-525 and CdS. In this work, the facile synthetic technique, specific active sites, and enhanced catalytic dynamics in the composite highlight the future research on MOF-based heterojunctions and their potential photocatalysis applications..
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-12
·
IF 9.429
Duan Wenyao,Li Bo,Zhang Wen,Li Jiaqi,Yao Xin,Tian Yupeng,Zheng Jun,Li Dandan
Designing new oxygenation nanomaterials by oxygen-generating or oxygen-carrying strategies in hypoxia-associated anti-tumor therapy is a high priority target yet challenge. In this work, we fabricated a nanoplatform involving Fenton-like reaction, Pd@MOF-525@HA, to relieve tumor hypoxia via oxygen-generating strategy for enhanced oxygen-dependent anti-tumor therapy. Thereinto, the porphyrinic MOF-525 can produce singlet oxygen (1O2) via light or ultrasonic irradiation for photodynamic and sonodynamic therapy. Notably, the well-dispersed Pd nanocubes within MOF-525 can convert H2O2 into O2 to mitigate the hypoxic environment for enhanced therapy outcome. Moreover, the two-photon activity and cancer cell specific targeting capability of Pd@MOF-525@HA gave rise to deeper tissue penetration and near-infrared light-induced fluorescence imaging to achieve precise guidance for cancer therapy. This work provides a feasible way in designing new oxygenation nanomaterials to relieve tumor hypoxia for enhanced cancer treatment.Graphical Abstract
研究领域:
纳米技术
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癌症研究
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）