CLAY MINERALS
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2021
·Vol. 56
·期 2
·99-107
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IF 1.478
Fengli Dai,Junhui Guo,Yufeng He,Pengfei Song,Rongmin Wang
Montmorillonite (Mnt), a clay mineral with a nanolayered structure, was combined with an Fe-based metal–organic framework (MOF; MIL-53(Fe)) using an in situ growth technique that yielded a novel eco-friendly clay-based adsorbent (MIL-53(Fe)@Mnt). The adsorbent was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and N2 gas adsorption. The MIL-53(Fe) particles grew on the surface of the nanolayered Mnt and the MIL-53(Fe) particle size became smaller. The adsorption performance of MIL-53(Fe)@Mnt was investigated by removing methylene blue (MB), and optimization experiments were carried out to study the effects of contact time, pH, initial dye concentration and adsorbent mass on the adsorption processes. The MIL-53(Fe)@Mnt exhibited excellent adsorption capacity for MB, namely 313.7 mg g−1, which was 3.02 times and 3.54 times greater than that of pure Mnt and MIL-53(Fe), respectively. Adsorption was fitted with the Langmuir isotherm model and followed a pseudo-second order kinetic model. The MIL-53(Fe)@Mnt obtained is a low-cost and eco-friendly adsorbing material and might be a candidate for removing dyes during water treatment.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ruobai Li,Zhiming Chen,Meixuan Cai,Jiaxing Huang,Ping Chen,Guoguang Liu,Wenying Lv
Metal-organic frameworks (MOFs) have attracted tremendous interest as photocatalysis for the destruction of organic contaminants. Herein, we synthesize a Fe-based MOF namely MIL-53(Fe), combined with Fe(III) and percarbonate, exhibits photocatalytic activity for the destruction of Sulfamethazine (SMT) under visible LED light irradiation. The morphology and physicochemical properties of the MIL-53(Fe) were determined using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectra (EDS), Fourier transform infrared spectroscopy (FTIR) and photoluminescence spectroscopy (PL). The results indicated that the photocatalytic performance of MIL-53(Fe) with unsatisfactory efficiency resulted from the rapid recombination of photogenerated electrons and holes. This may be suppressed through the introduction of an external electron acceptor (e.g., Fe(III) and percarbonate) to the catalytic process. It could be seen that the SMT degradation efficiency in the system of Vis/MIL-53(Fe)/Fe(III)/SPC attained nearly 90% within 60 min, while only 12% achieved in the system of Vis/MIL-53(Fe). The quenching experiments and EPR analysis were employed to illuminate the predominant reactive species in the system of Vis/MIL-53(Fe)/Fe(III)/SPC. It must be mentioned that the higher separation efficiency of photoinduced electron- hole pairs was achieved via the addition of Fe(III). The accelerated photocatalytic degradation of SMT could be attributed to the subsequent formation of reactive species, which were generated from the activation of SPS by Fe(II) reduced from Fe(III) in the Vis/MIL-53(Fe)/Fe(III)/SPC system. Furthermore, the mineralization of SMT was systematically investigated, as well as the effects of operating parameters (e.g., the dose of catalyst, the concentration of Fe(III), and pH). The work has expanded the possibility of MOFs as visible light responsive photocatalysts together with percarbonate for the remediation of contaminated water.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Dedi Liu,Dapeng Dong,Zhenyi Zhang,Yangyang He,Zhenghua Li,Jinhai Niu,Naisen Yu,Hongsheng Jia
Encapsulating organic dyes within porous solids is an efficient way to design luminescent composite materials and devices. However, for practice applications, the luminescence tuning and the stability investigation of such materials is still a challenge work. Here, a comparative in situ Raman spectra and photoluminescence (PL) spectra are employed to study the structural and optical property of both pure Rhodamine B (RHB) and samples absorbed on a kind of typical materials of institute lavoisier frameworks (MIL) under high pressure, respectively. The luminescence of RHB@MIL 53(Fe) can persist to pressures much higher than that for pure RHB. Our studies revealed that the PL emissions of RHB origin from monomeric and dimeric structures, respectively. Furthermore, our results indicated that the confining effect of MIL 53(Fe) pores inhibited the dimerization of RHB molecules under high pressure.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Fangxu Dai,Ying Wang,Xinran Zhou,Ruiyang Zhao,Jishu Han,Lei Wang
An efficient visible light responsive ZnIn 2 S 4 @NH 2 -MIL-53(Fe/Co 0.75 ) nanocomposite was prepared for photocatalytic hydrogen production application. Under visible light irradiation, the ZnIn 2 S 4 @NH 2 -MIL-53(Fe/Co 0.75 ) photocatalyst displayed improved photocatalytic performance and the hydrogen production rate reached to 161724.8 μmol/g in 6 h. The nanocomposite with large specific surface area and mesoporous structure increased the light absorption, improved the electrons transfer and suppressed the recombination of photogenerated electron-hole pairs, thus exhibiting efficient photocatalytic hydrogen production performance. The controllable synthesis of ZnIn 2 S 4 @NH 2 -MIL-53(Fe/Co 0.75 ) nanocomposite as a high-efficiency photocatalyst would have broad prospect for water splitting hydrogen production application.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jiami Ma,Zhixin Hu,Weihong Guo,Cheng Ni,Pan Li,Bosheng Chen,Songhua Chen,Jinlong Wang,Yanbing Guo
Ground−level ozone (O 3 ) pollution poses a significant threat to both ecosystem sustainability and human health. The catalytic decomposition of O 3 presents as a promising technology to address the issues of O 3 pollution. This study undertook the synthesis of various functionalized metal−organic framework (MOF) catalysts ( i.e., X-MIL-53(Fe) (X = H, NH 2 , NO 3 )) to delve into the influence of ligand functional groups on skeletal structure and catalytic efficacy, particularly focusing on unraveling the mechanism of O 3 catalytic decomposition under humid conditions. NH 2 -MIL-53(Fe) catalyst achieved complete O 3 decomposition under ambient temperature and high humidity conditions (RH=75 %), exhibiting a reaction rates (mol·m −2 ·s −1 ) 129 and 10.5 times greater than that of MIL-53(Fe) and NO 2 -MIL-53(Fe). The NH 2 group promotes electron flow within the backbone towards the hydroxyl group (OH) linked to Fe atom. In humid O 3 , H 2 O molecules augment the interaction between O 3 and NH 2 -MIL-53(Fe), and OH is converted to·O 2 − after deprotonation, promoting O 3 decomposition. Additionally, leveraging three−dimensional (3D) printing technology, a monolithic catalyst for O 3 decomposition was prepared for application. This study not only advances understanding of the mechanisms underlying O 3 decomposition but also offers practical solutions for addressing O 3 pollution at humid conditions.
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PubMed
高影响因子
Royal Society Open Science
·
2025
·Vol. 12
·期 11
·
IF 2.9
Omar Mirna,Omar Sarah,El-Subruiti Gehan M.,Attia Nour F.,Eltaweil Abdelazeem
With growing concerns over water pollution and depletion of freshwater resources, finding sustainable and cost-effective solutions for water treatment is crucial. This study introduces a novel MIL-53(Fe)/Mn-doped SrTiO3 (MIL-53(Fe)/Mn-STO) direct Z-scheme photocatalyst, designed to efficiently degrade organic contaminants in water. Specifically, the photocatalytic degradation of o-nitrophenol (ONP) was investigated under an Xe lamp. The MIL-53(Fe)/Mn-STO photocatalyst demonstrated a maximum removal efficiency of 97.75% within 90 min, with a rate constant (k) of 0.0374 min−1, outperforming the individual MIL-53(Fe) and Mn-STO photocatalysts. A comprehensive analysis of the material’s properties was conducted using Fourier transform Infrared spectroscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, diffuse reflectance spectroscopy and photoluminescence techniques, and the photocatalytic activity was evaluated under various conditions, including variations in pH, ONP concentration, catalyst dosage and the presence of inorganic anions. The improved photocatalytic activity of the MIL-53(Fe)/Mn-STO system can be ascribed to the synergistic interaction between its two components, which also contributed to its excellent recyclability over five cycles. These findings demonstrate that MIL-53(Fe)/Mn-STO is a highly effective and sustainable photocatalyst with a strong potential for wastewater treatment applications.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 14
·40534-40550
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IF 5.8
Fang Lei,Wu Guojian,Yao Keyu,Zhang Dongyang,Zhou Yongchao
A novel heterogeneous catalyst named MoS 2 /MIL-53(Fe, Cu) (MMFC) was prepared by hydrothermal method and applied in a heterogeneous electro-Fenton (hetero-EF) system for lomefloxacin (LOM) degradation in this work. Under the optimal conditions of current density 3 mA/cm 2 , catalyst dosage 0.100 g/L, and initial pH 6, 93.5% LOM (2 mg/L) removal efficiency was achieved in the MMFC hetero-EF system within 60 min, indicating an obvious improvement compared with the MIL-53(Fe, Cu) hetero-EF system. The good catalytic activity was attributed to more effective active sites of the catalyst and the conversion of Fe(II)/Fe(III) and Cu(I)/Cu(II) promoted by Mo(IV) in MoS 2 , which could be inferred by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) characterizations. The reusability and stability of MMFC were explored based on five cyclic experiments, and the average degradation efficiency reached 73.9%. Furthermore, the hetero-EF system could achieve the total removal of moxifloxacin and tetracycline within 6 min and 40 min, respectively. Quenching experiments revealed that the hydroxyl radicals (·OH) were the main reactive radicals while superoxide radicals (·O 2 − ) and singlet oxygen ( 1 O 2 ) played a certain part in LOM degradation. Finally, the possible mechanism of the hetero-EF process and LOM degradation pathways were proposed, including substitution, elimination, and cleavage of ring structures. Accounting for good catalytic performance, low preparation cost, and satisfactory versatility, the MMFC exhibited good potential to work as a hetero-EF catalyst for wastewater treatment.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Hangxi Liu,Haorong Sun,Ming Fang,Yifeng Zhang,Mingguang Kong,Zhimin Lv,Xiaoli Tan
The evaluation of the concentration of Pb(II) in solution has great significance in avoiding harm to ecology health. In this work, NH 2 -MIL-53(Fe) modified ITO glass (NH 2 -MIL-53(Fe)@ITO) was utilized as an electrochemical sensor for the detection of Pb(II) in solutions. FTIR and XPS investigation disclosed that the plentiful surface –NH group on the NH 2 -MIL-53(Fe) should be responsible for the highly efficient and selective detection abilities of Pb(II) due to the capture and conductivity abilities. The NH 2 -MIL-53(Fe) was prepared by a solvothermal technique and electrophoresed on the surface of ITO glass . A square wave voltammetry (SWV) method is employed for the sensitive determination of Pb(II). The factors of the detection condition such as the pH and ion interference are also studied. The sensitivity of 16.072 μA μM −1 cm −2 in the linear range of 2–4 μM and 54.143 μA μM −1 cm −2 in the linear range of 5–17 μM, and the limit of detection (LOD) of 0.1 μM are acquired. The repeatability and reproducibility are also studied. EIS and Tafel curves are utilized to investigate the effect of temperatures on the properties of the NH 2 -MIL-53. This work presents a facile strategy for the preparation of NH 2 -MIL-53(Fe)@ITO electrochemical sensor via electrolysis, which enhances the sensitivity toward Pb(II) and shows great application potential.
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JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 28
·15782-15797
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IF 4.22
Jiang Danni,Zhou Yu,Wang Ping,Huang Chao,Zhu Jian,Liu Zhiming
In the MOFs-based composites, the co-catalyst nanoparticles loads tend to agglomerate. In the self-assembly process of MOFs-based composites, the use of acid modulators solved the accumulation of AgI nanoparticles cocatalyst. The active sites of carboxyl groups and mesoporous structure brought by acid modulator provide more loading sites for AgI nanoparticles. The novel AgI/D-MIL-53(Fe) showed good adsorption and photocatalytic performance in the process of removing tetracycline pollutants. Compared to the degradation efficiency of the MIL-53(Fe) with 50.8%, it of AgI/MIL-53(Fe) increased to 85.1% and which further increased to 96.2% by AgI/D-MIL-53(Fe) based on the HCl modulator. On the one hand, it is beneficial for the mesoporous D-MIL-53(Fe) modulated by HCl modulator to disperse the AgI nanoparticles co-catalyst. On the other hand, AgI nanoparticles, as a photosensitive agent, adsorb visible light to generate photogenerated electrons and holes, and electrons rapidly transferred to the heterojunction bridge Ag 0 and then captured by the holes from the D-MIL-53(Fe). The construction of AgI/D-MIL-53(Fe) Z-scheme heterojunction provided favorable conditions for the rapid separation and photogenerated electrons and holes. Finally, ·O 2 − , ·OH and h + as the main active free radicals were driving forces. This study provided more possibilities and opportunities for the construction of mesoporous MOFs-based composites.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Shengchao Miao,Zhenxing Zha,Ying Li,Xinxiang Geng,Jiahui Yang,Shihai Cui,Jing Yang
The novel semiconductor heterojunction of MIL-53(Fe)/BiOCl composite was first prepared through the solvothermal reaction. The prepared materials were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunner-Emmet-Teller (BET) and ultraviolet-visible diffuse reflectance spectroscopy (DRS). MIL-53(Fe)/BiOCl heterojunction is a kind of photoexcited materials and it accelerates the photoreactivity of BiOCl under the visible light irradiation. It was used to remove Rhodamine B (RhB) with the existence of persulfate (PS). The UV–vis spectrophotometer and the TOC detector show that the degradation rate and TOC removal efficiency of RhB (20 mg/L) are 99.5% and 69.4%within 30 min visible-light irradiation, respectively. Due to the proper band gap of material and the presence of electron acceptor, PS, the survival time of active radicals are increased. The active species h + , ·SO 4 − and ·OH are found to play the important roles during the reaction system. The possible mechanism for the RhB degradation of MIL-53(Fe)/BiOCl/PS is also proposed. Furthermore, the results of the material reusability for the degradation of RhB indicate that the MIL-53(Fe)/BiOCl has a good stability and can be used in the environmental water sample treatment.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Zhiwang Yang,Xueqing Xu,Xixi Liang,Cheng Lei,Yuli Wei,Peiqi He,Bolin Lv,Hengchang Ma,Ziqiang Lei
A series of MIL-53(Fe)-graphene nanocomposite photocatalysts were synthesized by a facile one-pot solvothermal reaction. All materials have been thoroughly characterized by FT-IR, SEM, TEM, PXRD, UV–vis DRS and PL analysis. It was demonstrated that the introducing of graphene on the MIL-53(Fe) would minimize the recombination of photogenerated electron-hole pairs, thus, leading to the enhancement of photocatalytic activity. MIL-53(Fe)-graphene nanocomposite was an efficient catalyst towards the photocatalytic selectively oxidation of alcohols to the corresponding aldehydes or ketones under visible light and ambient conditions. High selectivity of the aldehydes or ketones (99%) were obtained. Meanwhile, the catalyst can be recycled at least four times without loss of catalytic efficiency. A possible photocatalytic reaction mechanism involving a direct photogenerated hole-oxidation process was also investigated in detail by the active species trapping experiments and the related electrochemical analysis.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Yu Qinyuan,Li Jiahui,Wang Yufen,Wei Xuedong
Transition metal sulfides (TMS) have drawn increasing research interest owing to their unique electronic structure. They hold broad prospects in accelerating the sluggish oxygen evolution reaction (OER) during water electrolysis. Metal-organic frameworks (MOFs) feature controllable electronic structures and specific surface areas, which facilitate the adsorption of reactants and expedite interfacial electron transfer. Leveraging the above-mentioned advantages of the two materials, a kind of composite electrocatalyst, CuCo 2 S 4 @MIL-53(Fe)/NF, was synthesized by growing MIL-53(Fe) in-situ onto CuCo 2 S 4 nanowires supported on nickel foam. This composite electrocatalyst can accelerate charge transfer, significantly increase the number of active sites, and enhance both electrocatalytic activity and stability. The electrocatalyst CuCo 2 S 4 @MIL-53(Fe)/NF can drive the OER with an overpotential of 390 mV at a current density of 100 mA·cm −2 . Moreover, it still demonstrates excellent catalytic activity after 75 h of testing. This study not only broadens the avenues for sulfide composites but also provides an experimental basis and support for the direct combination of metal chalcogenides and Fe-based MOFs as electrocatalysts.
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