Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Jinchao Chen,Chunmei Gao,Shuangquan Zhao,Shenghui Liu,Shifeng Ji,Yunqing Xing,Tianyang Wu,Jinjian Wu,Hongyu Chen,Peng Zou,Jiaonan Cai
In this work, the NH 2 -MIL-125/F127/PES membranes with superior ultrafiltration , anti-fouling and self-cleaning were constructed via the RTIPS method. Characterizations showed the successful fabrication of NH 2 -MIL-125 with good photocatalysis activities, together with its stable anchoring in PES membrane. The loss of NH 2 -MIL-125 was suppressed by hydrogen bond between F127 and NH 2 -MIL-125, where hydrophilic F127 significantly boosted permeability and anti-fouling property. The permeability-selectivity trade-off effect was alleviated by NH 2 -MIL-125 with a regular size window. It was observed that the membranes prepared by the RTIPS method occurred a spongy-like cross-section and a porous surface, which imparted the membrane with improved ultrafiltration and mechanical properties over the finger-like cross-section and dense skin caused by the NIPS method. The optimal membranes exhibited decent permeability (1511 L/m 2 h), BSA rejection rate (85.3%) and high COD removal rate over the commercial membranes, whose flux recovery rate was up to 76.91% after two cycles under light irradiation by the synergistic effect of F127 and NH 2 -MIL-125. The membrane fouled with RhB exhibited excellent regeneration properties benefiting from the holes (h + ) and superoxide free radicals ( • O 2 − ), as well as reactive •OH. Overall, the membrane with F127 and NH 2 -MIL-125 presented a highly promising in improving ultrafiltration and self-cleaning via the RTIPS method.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yuwei Sun,Xin Qi,Chou Chen,Wenyu Liu,Qian Tang,Honghui Teng,Baixiang Ren
In this work, AgI nanoparticles were anchored on decahedron-like MIL-125(Ti) through wet precipitation method, and the photocatalytic activities were analyzed by tetracycline (TC) degradation rates under simulated sunlight. The structures, morphologies, valence bonds, optical absorption properties, charge separation efficiencies of the prepared samples were tested by XRD , SEM, EDS , XPS, UV–Vis DRS and PL spectroscopy. Compared with pure MIL-125(Ti), AgI@MIL-125(Ti) displayed excellent photocatalytic performance on TC degradation. When the mass fraction of AgI in AgI@MIL-125(Ti) was 10 %, AgI@MIL-125(Ti)-10 % displayed the best photocatalytic efficiency, which 96.9 % of TC was removed under simulated sunlight for 30 min. The results of active species trapping experiments and ESR tests showed that the Z-Scheme heterojunction between AgI and MIL-125(Ti) promoted the separation of photogenerated charges. Furthermore, a part of Ag + were reduced to Ag NPs in the process of photocatalytic reaction, which constructed a cross-linking bridge for the charges at the interface of AgI and MIL-125(Ti) and further accelerated the electron transmission. The intermediate toxicity experiments proved that the toxic structures are destroyed in TC solution after MIL-125(Ti)-10 % photocatalytic degradation, and the toxicity of the reaction system was reduced effectively.
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Catalysis Science & Technology
·
2018
·Vol. 8
·期 7
·1936-1944
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IF 5.365
Zhongmin Liu,Yongchuan Wu,Jitao Chen,Yaru Li,Jingyu Zhao,Kaihua Gao,Ping Na
A bifunctional cake-like TiO2 was successfully synthesized via calcination of MIL-125(Ti) at a suitable temperature by a one-step method and was applied for As(III) removal by simultaneous photocatalytic oxidation and adsorption. The as-synthesized samples were characterized by XRD, TGA/DSC, SEM, TEM, N2 adsorption–desorption isotherms, PL spectra, photocurrent, FTIR and XPS. The effects of calcination temperature on the specific surface areas of the samples, transformation of the TiO2 crystal phase and properties of As(III) removal were investigated. The results showed that higher calcination temperature resulting in a lower specific surface area and more transformations of the TiO2 crystal phase from anatase to rutile. The TiO2 calcined at 380 °C (MIL-125(Ti)-380 °C) exhibited excellent properties for As(III) removal, including photocatalytic oxidation of As(III) and simultaneous adsorption of the generated As(V). In addition, MIL-125(Ti)-380 °C could be reused at least four times without significant reduction in the photocatalytic oxidation and adsorption performances. The excellent photocatalytic oxidation and adsorption abilities of MIL-125(Ti)-380 °C can be attributed to the synergistic effects of strong photogenerated electron–hole separation and high specific surface area. The bifunctional cake-like TiO2 provides a wonderful strategy to remove As(III) completely from contaminated water using a single step.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Syed Jalil Shah,Xinqi Luan,Xin Yu,Weige Su,Yucheng Wang,Zhongxing Zhao,Zhenxia Zhao
The development of metal organic framework (MOF)-based π-π conjugated structures capable of effectively transforming H 2 O from humid air to • OH radicals for VOCs photodegradation is a significant but difficult task. Herein, an amino-ionic liquid (NH 2 -IL) based dual-mode bridging strategy was proposed to connect 3D-graphene with NH 2 -MIL-125 forming IL-3DGr/NM(Ti) nanohybrids for advanced acetaldehyde photodegradation. The rational integration of these components was responsible for: (1) maintaining π-π conjugated electron transport system; (2) generating abundant coordinatively unsaturated sites and oxygen vacancies; (3) increasing surface area of the nanohybrids. With these attributes, IL-3DGr/NM(Ti) demonstrated enhanced charge separation and transportation electrochemical impedance spectroscopy (EIS): 7-times), acetaldehyde adsorption (22 %), light absorption (bandgap: 1.51 eV). The rapid H 2 O adsorption and photoconversion to • OH radicals by IL-3DGr/NM(Ti) enabled it to demonstrate superior CH 3 CHO photodegradation rate under high humidity, surpassing many state-of-the-art photocatalysts by 9 to 187 times under static air conditions and with nearly similar catalyst dosages* (photocatalyst weight and initial acetaldehyde concentration (mg ppm −1 ) ratio). Interestingly, the IL-3DGr/NM(Ti) photocatalytic activity was enhanced by increasing RH% up-to 80 %. Besides, the nanohybrids demonstrated tremendous stability, with only a 3.9 % decline observed after 5 consecutive-cycles. This strategy provides new prospects to improve the compatibility of graphene/MOF materials for futuristic photoelectrical applications under high humidity.
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高影响因子
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 .
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Energy Storage Materials
·
2024
·
IF 18.9
Zhenyu Fu,Yuhan Li,You Zhou,Weiya Zhang,Lirong Huang,Ling Weng
Lithium metal batteries have potentially high energy density, but severe uncontrolled lithium dendrites and unstable side reactions prevent large-scale applications. Serial three-dimensional porous poly (vinylidene fluoride) and copolymer membrane-based composite gel electrolytes are designed by introducing MIL-125 (Ti) and ethylene carbonate. Abundant lithium-ion transportation channels and homogeneous ion transport microregion are provided the new type porous fluoropolymer substrate. We also find that crystalline phase and dielectric properties of serial polymer membrane have significant impact on electrochemical performance for composite gel electrolytes. The mechanical and dielectric property of composite electrolyte enhanced by incorporating uniform and well distribution MIL-125 (Ti), which improve the electrolyte/electrode interface charge distribution and promote uniform lithium deposition, leading to lithium dendrite suppression. MIL-125 (Ti)/P(VDF-TrFE-CTFE) composite membrane shows the enhanced maximum strain of 181%, thermal stability (188°C) and corresponding composite gel electrolyte reflects higher ionic conductivity of 1.7 × 10 -3 S cm -1 and wider electrochemical window at room temperature than PVDF and PVDF-HFP composite electrolytes. Expectedly, quasi-solid state lithium metal battery of MIL-125 (Ti)/P(VDF-TrFE-CTFE) composite gel electrolyte exhibits higher discharge capacity (152.8 mAh g -1 ) at 240th cycle and 1 C, longer cycling life and better rate performance under large current density than PVDF and PVDF-HFP composite electrolytes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Jiepeng Zhao,Zijian Li,Yu Zuo,Sai Huang,Zhaomin Tong,Yifei Ma,Liantuan Xiao,Suotang Jia,Xuyuan Chen,Mei Wang
NH 2 -MIL-125(Ti) (NM) is a prototypical metal–organic framework (MOF) photocatalyst with visible-light responsiveness. However, its practical application in CO 2 reduction is significantly limited by fast charge carrier recombination and poor product selectivity. Constructing heterojunctions with appropriately matched semiconductors offers an effective strategy to overcome these limitations, where coupling material selection and precise interfacial engineering are key. ZnO, a stable n-type wide-bandgap semiconductor, not only possesses excellent electron mobility but also exhibits suitable conduction band alignment with NM, enabling favorable interfacial charge transfer. Moreover, ZnO can form an interfacial Ti–O–Zn bonding bridge with NM, facilitating directional electron transport and suppressing charge recombination. In this work, we employed atomic layer deposition (ALD) to construct uniform ZnO shells on NM with sub-nanometer precision, thereby finely tuning the ZnO loading and interface structure. A series of ZnO@NH 2 -MIL-125 (ZnO@NM) composites are obtained by controlling the ZnO loading, with the optimal sample showing the highest activity, yielding 13.30 μmol h −1 g −1 of CO and 5.47 μmol h −1 g −1 of CH 4 . Notably, CH 4 selectivity is significantly improved from 16 % to 29 %, and further increases to 31 % under gas-solid conditions. In situ Fourier Transform Infrared (FTIR) spectroscopy and Density Functional Theory (DFT) calculations reveal that ZnO not only promotes directional interfacial electron transfer but also facilitates the hydrogenation of *CO to *CHO, thus enhancing CH 4 selectivity. This study demonstrates an ALD-enabled interface engineering strategy to construct MOF-semiconductor heterojunctions, offering mechanistic insights and design principles for advancing efficient and selective photocatalytic systems for carbon dioxide reduction.
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高影响因子
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2020
·Vol. 16
·期 6
·996-1002
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IF 2.831
Zhang Rui,Li Gang,Zhang Yue
In this study, we decorated CdS on the surface of MIL-125(Ti) using a photochemical method to prepare the CdS-MIL-125(Ti) nanocomposites. The obtained samples were characterized by a series of techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectra, electrochemical measurements and UV-Vis diffuse reflectance spectra (DRS). The results show that the CdS nanoparticles were highly dispersed on surface of MIL-125(Ti). The combination will promote the separation of electron–hole pairs and increase the dispersity of CdS. The nanocomposites were subsequently used as photocatalysts in the selective oxidation of benzyl alcohol to benzaldehyde using the molecular oxygen as the oxidant. The nanocomposites show excellent performance in the photocatalytic reaction under visible light irradiation. The conversion of benzyl alcohol to benzaldehyde was about 20.1% with no by-products observed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
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.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 22
·12459-12470
·
IF 2.936
Minghua Wang,Longyu Yang,Jinyun Yuan,Linghao He,Yingpan Song,Hongzhong Zhang,Zhihong Zhang,Shaoming Fang
A series of bismuth sulfide (Bi2S3) nanorods and amine-functionalized Ti-based metal–organic framework heterojunctions [denoted by Bi2S3@NH2-MIL-125(Ti)] were constructed and explored as bifunctional photocatalysts for Cr(VI) reduction and rhodamine B (RhB) degradation under visible light illumination. Compared with the individual NH2-MIL-125(Ti) and Bi2S3, the as-synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst exhibited an enhanced photocatalytic activity toward Cr(VI) and RhB owning to the synergetic effect between Bi2S3 and NH2-MIL-125(Ti). Moreover, the Bi2S3@NH2-MIL-125(Ti) heterojunctions showed increased Cr(VI) removal efficiency by adding RhB in the system. The photocatalytic mechanism was proposed based on the analysis of different scavenger for active species and electron spin resonance spectrometry. The introduction of Bi2S3 into NH2-MIL-125(Ti) can extend the light adsorption and improve the transfer and separation of photogenerated charge carriers through the Bi2S3@NH2-MIL-125(Ti) heterojunction with unique band gap structure. The synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst also exhibited good reusability and stability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiepeng Zhao,Yifei Ma,Zijian Li,Zhaomin Tong,Mei Wang,Liantuan Xiao,Suotang Jia,Xuyuan Chen
This study presents the design of a composite photocatalyst that harnesses the combined effects of internal and external heterojunctions for enhanced performance. The internal heterojunction is achieved by annealing NH 2 -MIL-125(Ti) (NM) under an argon atmosphere, forming an N-doped C-coated anatase/rutile heterostructure (A-NM). By controlling the annealing temperature, the A-NM prepared at 650 °C (A 650 -NM) demonstrates superior photocatalytic CO 2 reduction capability, with an outstanding CO production rate of 0.25 μmol h −1 g −1 under a light intensity of 0.1 W cm −2 . An external heterojunction is then created by combining NM and A 650 -NM in an optimized ratio. At an optimal composite ratio of 9:1 (NM: A 650 -NM), the CO production rate reached 6.3 μmol h −1 g −1 , which is 3.5 times higher than NM and 25 times higher than A 650 -NM. Characterization and DFT analyses reveal that the improved performance stems from the internal heterojunction within A 650 -NM's TiO 2 crystal phases and the external heterojunction between NM and A 650 -NM, which enhanced charge separation and carrier mobility. The N-doped carbon layer further boosts charge carrier transfer efficiency. This work introduces a novel Metal–Organic Framework (MOF)-based photocatalyst for CO 2 reduction, offering valuable theoretical insights and practical strategies for optimizing its performance.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yi Wen,Chenguang Qian,Xiaohan Li,Ruizhe Sang,Fang Yuan,Chunquan Li,Zhiming Sun
The development of heterojunction photocatalysts is pivotal in enhancing charge transfer and inhibiting the recombination of photoexcited electron-hole pairs, which is an effective strategy to improve CO 2 conversion. In this study, we have been assembled the TiO 2 @NH 2 -MIL-125 S-scheme heterojunction on the surface of diatomite. Comprehensive characterization confirms the S-scheme charge transfer pathway, which not only promotes preferential accumulation of photogenerated charges at catalytically active sites but also enables rapid, low-resistance charge separation and migration. Meanwhile, the introduction of diatomite improves the dispersion of the active components and accelerates the separation of photogenerated carriers driven by the built-in electric field. Consequently, the TiO 2 @NH 2 -MIL-125/diatomite composite exhibits selective photocatalytic CO 2 to CO conversion without requiring sacrificial reagents. The composite achieves a CO evolution rate of 13.53 μmol g −1 h −1 , which is 2.20 times and 1.33 times higher than pure TiO 2 and the binary TiO 2 @NH 2 -MIL-125 composite, respectively. Furthermore, the composite maintains a stable CO production rate after three reaction cycles. This study presents an approach to designing mineral-supported S-scheme heterojunction photocatalysts for solar energy conversion applications.
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