Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
·
IF 3.9
Kashif Nawaz Khattak,Maosen Zhang,Caixia Deng,Shuang Li,Ling Jiang,Pran Gopal Karmaker,Xiupei Yang
In this work, the hybrid material NH 2 -MIL-125(Ti)@TpPa-NO 2 was synthesized by grafting an amino-functionalized titanium-based metal–organic framework (NH 2 -MIL-125(Ti)) with 2,4,6-tri(4-pyridyl)-1,3,5-triazine-nitro (TpPa-NO 2 ) moieties. The resulting composite material exhibited remarkable removal efficiency owing to the synergistic effects derived from the combination of the NH 2 -MIL-125(Ti) and TpPa-NO 2 components. The material demonstrated excellent stability and recyclability, making it a promising candidate for the treatment of wastewater containing rhodamine-B (Rhd-B). Some characterization techniques were employed to elucidate the structural features and surface morphology of the hybrid material. The adsorption capacity of NH 2 -MIL-125(Ti)@TpPa-NO 2 for Rhd-B dye was evaluated, and the results revealed an exceptional removal efficiency of 99.96 % and a high adsorption capacity of 25.54 mg/g, highlighting the superior adsorption performance of the material. The adsorption process was found to follow Langmuir isotherm and pseudo-second-order kinetics, indicating that chemisorption is the predominant mechanism governing the uptake of Rhd-B dye onto NH 2 -MIL-125(Ti)@TpPa-NO 2 .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Processes
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2024
·Vol. 12
·期 9
·1879
·
IF 2.8
Huiying Yang,Xiangchao Meng
The conversion of nitrogen (N2) and water (H2O) into NH3by photocatalysis under ambient conditions has been considered an environmentally friendly strategy. However, developing effective catalysts for N2fixation is still challenging. Herein, we report a bimetallic JH Fe, Co/TiO2derived from NH2-MIL-125(Ti) by the fast Joule heating (FJH) method for visible–light–driven catalytic N2fixation. It was found that the photocatalytic N2reduction efficiency of bimetallic FC@TiO2-JH was improved, enabling an NH3yield rate of 110.14 µmol g−1h−1without any sacrificial agents. Furthermore, the rate was higher than those of Fe@TiO2-JH and Co@TiO2-JH, suggesting that the synergistic effect between Fe and Co broke the electronic equilibrium and increased the center of its d-band, enhancing electronic feedback to the antibonding π* orbitals of N2while weakening the bonding energy of N≡N. Meanwhile, the rate was about 2.75 times higher than that of FC@TiO2-TF, which was calcined in a tube furnace. It is assumed that FJH might lead to the formation of lattice defects, leading to localized charge deficiency, enhanced carrier separation, and transport. Thus, doping of Fe and Co synergistically interacted with the defects produced from FJH, facilitating the photocatalytic reduction process. As detected, it had a greater ability to separate hole–electron pairs and transferred electrons to adsorbed N2at faster rates. Our work demonstrates a prospective strategy for designing bimetallic catalysts derived from NH2-MIL-125(Ti) for N2fixation.
研究领域:
材料科学
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环境科学
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催化化学
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2014
·Vol. 29
·期 1
·12-19
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IF 2.017
Hongxu Guo,Fan Lin,Jianhua Chen,Feiming Li,Wen Weng
A metal–organic framework material, MIL-125(Ti), was solvothermally prepared and characterized using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and surface area measurements. MIL-125(Ti) was then used as an adsorbent for Rhodamine B (RhB) removal in aqueous solution. The adsorption kinetics, adsorption mechanism, adsorption isotherm, activation energy and various thermodynamic parameters were studied in detail. The maximum adsorption capacity of MIL-125(Ti) for RhB was 59.92 mg g −1 . MIL-125(Ti) appears to be a promising material for RhB adsorption from aqueous solutions. Copyright © 2014 John Wiley & Sons, Ltd.
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
MICROCHIMICA ACTA
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2020
·Vol. 187
·期 4
·1-8
·
IF 6.232
Li Jingxian,Shan Xueling,Jiang Ding,Wang Wenchang,Chen Zhidong
Ultrasensitive and selective determination of bisphenol A (BPA) was achieved by a solid-state electrochemiluminescence (ECL) aptasensor. The Ti-based MOFs (MIL-125, MIL stands for Materials of Institute Lavoisier) have porous structure and large specific surface area. They were used as a carrier for Ru(bpy) 3 2+ by a hydrothermal synthesis method. The Ru(bpy) 3 2+ encapsulated MIL-125 (Ru(bpy) 3 2+ @MIL-125) was dropped on a glass carbon electrode (GCE) and used as working electrode. After that, the thiol-based aptamer of BPA was used to modify the working electrode by Ti–S bond. As a result of the specific binding affinity between aptamer and BPA, the ECL signal was significantly quenched. Thus, a selective electrochemiluminescence (ECL) aptasensor for BPA was developed. The ECL aptasensor based on Ru(bpy) 3 2+ @MIL-125 has a good ECL response toward detecting BPA. Under optimal conditions, the aptasensor can detect BPA in a wide linear range from 1.0 × 10 −12 to 1.0 × 10 −6 M with an excellent determination limit of 6.1 × 10 −13 M (S/ N = 3). The ECL aptasensor can selectively detect BPA in a mixture containing BPA interference compounds.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Shichen Wang,Yixuan Liu,Yue Hu,Weibo Shen
Metal-organic frameworks (MOFs) are gradually used since of their huge specific surface area and superior pore structure. However, there are problems such as easy aggregation and difficult separation in water treatment. In this study, we prepared composite microspheres (FMCS-1) by modifying MIL-125-NH 2 with Fe 3 O 4 and chitosan. The structural characterization and performance analysis of the materials showed that the introduction of chitosan effectively prevents the stacking of MOFs. The magnetic test manifested that Fe 3 O 4 solved the problem of the difficult separation of MOFs from water. The removal potential of toxic Cr(VI) was tested by adsorption experiments. The isotherm model indicated that FMCS-1 is a single molecular layer adsorbent with a maximum adsorption capacity of 109.46 mg/g at pH = 2. The adsorption kinetics showed that the adsorption of Cr(VI) by FMCS-1 was chemical adsorption. The acid resistance test demonstrated that FMCS-1 can exist stably in acid solutions. The recycling experiments proved that the adsorbent can be reused and the removal percentage still reaches 50 % after 5 cycles. This work expands the application of MOFs in water treatment and also provides an effective adsorbent for Cr(VI) removal.
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 MEMBRANE SCIENCE
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2021
·
IF 8.742
Chi Wang,Xiaoxuan Zhao,Jinghui Wu,Xia Yang,Xiaochun Cui,Wenzhe Geng,Zhi Geng,Xianze Wang
Efficient utilization of renewable solar energy is attractive in the membrane separation process of water treatment. In this study, a series of tight reactive hybrid ultrafiltration membranes were fabricated by covalently grafting Ag@NH 2 -MIL-125 nanoclusters on the side chains of a poly(aryl ether sulfone) matrix containing trifluoromethyl and carboxyl groups. Due to the homogeneous introduction of functional nanoreactors with high-efficiency solar photocatalytic degradation ability, the prepared tight hybrid membranes could approach good self-cleaning anti-fouling properties under sunlight irradiation. And the optimal sample exhibited an excellent water flux recovery ratio of 99.1% after irradiated by 10 min simulated sunlight. Additionally, the tight reactive hybrid membranes displayed excellent anti-aging robustness via the use of a fluorine-containing poly matrix, maintaining the stable high pollutant retention rate during the long-term ultrafiltration separation process. This work provided a new strategy to fabricate high-performance solar-driven reactive hybrid membranes for ultrafiltration separation processes.
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
Catalysts
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2023
·Vol. 13
·期 5
·817
·
IF 3.9
Haoyu Yuan,Chao Zhang,Wenjing Chen,Yuzhou Xia,Lu Chen,Renkun Huang,Ruiru Si,Ruowen Liang
Metal–organic frameworks (MOFs) are new porous materials composed of metal centers and organic ligand bridges, which received great attention in the field of photocatalysis. In this work, Ag2CrO4@MIL–125(Ti)–NH2(denoted as AgCr@M125) Z–scheme heterojunctions were synthesized via a simple microemulsion method, by which highly dispersed nano–sized Ag2CrO4can be anchored uniformly on the surfaces of porous MIL–125(Ti)–NH2(denoted as M125). Compared with pure M125 and Ag2CrO4, the as–prepared AgCr@M125 hybrids show significant photocatalytic efficiency against inactivatedStaphylococcus aureus(S. aureus), reaching over 97% inactivation of the bacteria after 15 min of visible light irradiation. Notably, the photocatalytic activity of the obtained 20%AgCr@M125 is about 1.75 times higher than that of AgCr–M125, which was prepared via a traditional precipitation method. The enhanced photocatalytic antibacterial activity of the AgCr@M125 photocatalytic system is strongly ascribed to a direct Z–scheme mechanism, which can be carefully discussed based on energy band positions and time–dependent electron spin response (ESR) experiments. Our work highlights a simple way to enhance the antibacterial effect by coupling with Ag2CrO4and M125 via a microemulsion–assisted strategy and affords an ideal example for developing MOFs–based Z–scheme photocatalysts with excellent photoactivity.Keywords:MIL–125(Ti)–NH2;Ag2CrO4;S. aureus;Z–scheme;microemulsion method
研究领域:
材料科学
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环境科学
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微生物学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Libo Wang,Shiyu Wang,Mohan Li,Xue Yang,Fengyan Li,Lin Xu,Yongcun Zou
With the emergence of issues such as global warming and glaciers melting, reducing carbon emissions cannot be ignored. Ammonia can participate in the N element cycle in nature and has a huge market demand. In modern industry, the preparation of ammonia mainly relies on the Haber-Bosch process with huge energy consumption. Using clean photocatalytic method to prepare ammonia can alleviate the above problems. Here, the core-shell structure of MIL-125 @TiO 2 was prepared by post solvothermal method for photocatalytic nitrogen fixation . Linker defects can appear as active sites in the residual MIL-125, which forms an obvious mesoporous structure that accelerates the exchange of electron/mass and promotes the activation of N 2 . The shell structure constructed by thin TiO 2 nanosheets possesses a large specific surface area . And the oxygen vacancies active sites could be highly exposed for nitrogen adsorption and activation, so as to promote the occurrence of the photocatalytic reaction. The O−Ti−N covalent bond is established between the titanium-oxygen clusters in the peripheral of TiO 2 and the linker in MIL-125, which improves the effective separation of electron-hole pairs. The ammonia formation rate of MIL-125 @TiO 2 -2 h is 102.7 µmol g −1 h −1 under simulated sunlight, which is 8 times higher than that of MIL-125. This work provides a novel idea for the preparation of photocatalytic nitrogen fixation materials with controllable structure and multiple active sites.
研究领域:
材料化学
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光催化
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纳米材料
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环境科学
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能源化学
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多相催化
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yi Wen,Chenguang Qian,Bowen Cui,Boxuan Tian,Chunquan Li,Hang Li,Fang Yuan,Zhiming Sun
Photocatalytic CO 2 reduction harnesses sunlight to convert CO 2 into fuels (e.g., CO, CH 4 ) to address global warming and energy shortages, but faces challenges like high cost and low efficiency. In this work, NH 2 -MIL-125(Ti)/diatomite composites were prepared by one-step solvothermal method using diatomite as a support. Characterization indicated that NH 2 -MIL-125(Ti) units were grown in-situ on diatomite through surface-mediated interactions with Si-O-Ti bonds. This process significantly reduced the agglomeration of NH 2 -MIL-125 particles. Among the resulting composites, NH 2 -MIL-125/DE-60 % had the best photocatalytic activity with a CO production rate of 7.36 μmol g −1 h −1 , which is 1.56 times higher than NH 2 -MIL-125. In four cycles, the yield remained above 6.88 μmol g −1 h −1 . Meanwhile, electrochemical characterization revealed that composite enhances the separation efficiency of photogenerated carriers and reduces carrier migration resistance. The excellent performance of NH 2 -MIL-125/diatomite composites could be attributed to the synergistic effects of its better dispersion and the Si-O-Ti interface formation, which improve light absorption, increase the number of active sites and facilitate charge separation. Meanwhile, the specific mechanism of CO 2 reduction by NH 2 -MIL-125/diatomite composites and its reduction pathway were also revealed. In conclusion, this study successfully reduced the agglomeration effect of MOFs, and provided implications for realizing in-situ growth of MOFs on mineral surfaces.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2024
·
IF 5.1
Hongmin Dai,Xuan He,Xing Du,Weixin Li,Daheng Wang,Hui Chen,Wei Fang,Lei Zhao
Applying piezoelectric effect on modulating charge transport behavior was considered as one efficient strategy to make feasible charge separation in photocatalysts towards boosting hydrogen evolution performance. Here, with employing corona-poling treatment, SrTiO 3 is converted to be a piezoelectric component in the constructed type II NH 2 -MIL-125(Ti)/SrTiO 3 heterojunction . Since the piezoelectric field could tilt the band bending to a degree to be convenient for the charge transfer from SrTiO 3 to NH 2 -MIL-125(Ti), it is also favorable to offer additional active sites on SrTiO 3 to form dual reduction sites for the following piezo-photocatalytic reaction. Both the ameliorated surficial polarization and charge transfer trajectory in NH 2 -MIL-125(Ti)/SrTiO 3 type II heterojunction are devoted to the boosted hydrogen production rate for NH 2 -MIL-125(Ti)/SrTiO 3 -0.1 (NM/STO-0.1), that is up to 1562.3 μmol h −1 g −1 , 1.79 times higher than that of unpolarized NM/STO-0.1 (871.6 μmol h −1 g −1 ) and 2.35 times higher than that of NH 2 -MIL-125(Ti) (663.8 μmol h −1 g −1 ), respectively. This research reported initially the assistant of SrTiO 3 with piezoelectric feature for enhanced performance photocatalytic hydrogen evolution, which could be one prominent strategy to achieve the reasonable design of efficient photocatalytic system.
研究领域:
材料科学
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纳米技术
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催化
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Jiejun Li,Lin Li,junjie Fei,Pengcheng Zhao,Jinyao zhao,Yixi Xie
Fenitrothion (FT) is a common organophosphorus pesticide widely used in agricultural. Residues of fenitrothion in crops can adversely affect human health. In this work, modified MIL-125-Fe was prepared by changing the solvent ratios and further etching with iron nitrate, followed by high-temperature pyrolysis to obtain modified-TiO 2 /FeTiO 3 -doped nitrogen-containing carbon framework (m-TiO 2 /FeTiO 3 @NCF). The porous carbon material of m-TiO 2 /FeTiO 3 @NCF was used to modify the GCE to produce FT electrochemical sensor. Under optimized conditions, the sensor exhibited good detection performance for FT with a low LOD of 0.96 nM and a wide detection linear range of 1–9000 nM, and also exhibited good reproducibility (RSD = 2.08 %), repeatability (RSD = 1.09 %) and anti-interference performance. The sensor was successfully applied in real sample tests showing the recovery rates of 98.7 %–101.2 %. The present study provides a new idea for the rapid and accurate detection of FT.
研究领域:
农业科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yang Wang,Sheng Feng,Wei Wu,Yun Zhou,Zhiwei Ye,Xiaojun Dai,Xun Cao
In this article, we reported a method for synthesizing cluster-like NH 2 -MIL-125(Ti)/BiOBr (NMT/B) Z type heterojunction composite materials with different content by using ionic liquid as bromine source assisted solvothermal method. In visible light , the photocatalytic activity of the materials was analyzed by degradation of tetracycline. Characterize the prepared composite material by XRD , FTIR, SEM, TEM, XPS , UV–vis diffuse reflection spectra (DRS). The result proved that the NH2-MIL-125(Ti) (NMT) nanosheets were tightly loaded on the BiOBr surface. NMT/B composite materials showed higher catalytic activity than monomer materials. The removal rate of TC reached 88% in 90min, which was 3 times and 5.7 times that of the monomer NMT and BiOBr monomer materials, respectively. In the catalytic process, –O 2 - and h + are the main active substances that degrade pollutants. This is proved by free radical capture experiments. It could be inferred that the improved photocatalytic activity of NMT/B composites was contributed to the good energy band structure and the formation of Z-type heterojunctions in close contact, which greatly facilitates the photogenerated carrier and hole migration and dissociation. Cycle experiment proved that the prepared composite material has excellent stability, which indicated that it had a good prospect in practical applications.
研究领域:
材料科学
·
环境科学
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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）