JOURNAL OF MEMBRANE SCIENCE
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2016
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IF 5.557
Lina Xu,Jia Xu,Baotian Shan,Xiulin Wang,Congjie Gao
Pure organic nature and nanoporous structure make covalent organic frameworks (COFs) a promisingly potential candidate in mixed matrix membranes (MMMs). However, COFs-based MMMs have hardly ever been applied in water purification due to their hydrolytic nature. In this study, we elaborately selected TpPa-2 with extensive stability in complicated water-environments as nanofiller to prepare MMMs for water treatment for the first time. Microwave synthetic technique was employed and optimized to construct the TpPa-2(MW) with a much higher BET surface area, smaller particle size, less agglomeration tendency and excellent stability. TpPa-2 was also synthesized mechanochemically (MC) for comparison to indicate how the synthetic technique influences the TpPa-2 and TpPa-2-incorporated MMMs. Membrane structure and property, water transport capacity and separation performance of both TpPa-2(MW)- and TpPa-2(MC)-incorporated MMMs were comprehensively investigated. It proved that our MMMs with an ultralow amount (0.2 wt%) of TpPa-2(MW) featured both improved water flux and rejection, breaking the trade-off between permeability and selectivity for polymer membrane. A membrane forming mechanism was further proposed to understand the effectiveness of TpPa-2(MW) in MMMs. This new generation COFs-based MMMs would be highly efficient, resource saving and cost-effective, which promise a great potential application in practical water purification .
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Zhuo Dai Li,Huai Qiang Zhang,Xiao Hong Xiong,Feng Luo
Covalent organic frameworks (COFs) represent an exciting new type of porous organic materials, which are constructed with organic building units via strong covalent bonds . Here in, the COF-2,4,6-Triformylphloroglucinol p-Phenylenediamine (COF-TpPa-1) was synthesized by solvothermal method for the removal of U(VI) from aqueous solution. Effects of pH, adsorption dose, contact time, uranium solution concentration, temperature and adsorption and desorption cycle on the efficiency of COF-TpPa-1 removal of U(VI) are investigated. SEM, XRD , TGA and FT-IR were employed to characterize the samples and analyze adsorption mechanism. The results manifested COF-TpPa-1 has the high adsorption capacity ( q m = 152 mg/g), quick adsorption kinetic , high selectivity , outstanding recycle performance and good resistance to acids, bases and high temperature.
研究领域:
环境化学
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材料科学
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核化学
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污染治理
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吸附科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Yueyangchao Yu,Yanting Tang,Longjie Liu,Qingnan Wang,Chongshan Yin,Keming Zhang,Chenlu Liu,Yi Ye,Xinglei Zhao,Tianhe Gu,Shaofei Wang
Covalent organic frameworks (COFs) show exceptional promise for CO2-selective mixed matrix membranes (MMMs) due to their tunable porosity and structural robustness. To mitigate COF aggregation in MMMs, we present an in situ growth strategy by directly integrating COF precursors into a polymer matrix. By optimizing reaction conditions, we achieve uniform dispersion and successful in situ formation of TpPa (derived from 1,3,5-triformylphloroglucinol and p-phenylenediamine) within the Pebax matrix. The optimized membrane exhibits a high CO2 permeability of 313.4 Barrer (45.8% higher than pure Pebax) and CO2/N2 selectivity of 22.6, along with long-term stability. Positron annihilation lifetime spectroscopy further reveals how the integration of COFs modulates the membrane’s free-volume properties. This study not only addresses filler dispersion challenges but also provides a viable approach for fabricating high-performance, stable CO2 separation membranes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xiaocui Zhang,Jun Gao,Min Li,Wei Gao,Qinghui Shou
Bromide ions may transform into harmful by-products such as bromate during the disinfection process, posing a threat to water quality and human health. Therefore, it is essential to remove bromide ions from water to reduce the risk of their conversion into more toxic compounds. Our study investigates the application of a novel covalent organic framework (COF) material for the removal of bromide ions from water. Through the optimization of the synthesis process, we have developed a COF material TpPa-SO 3 Ag, with a high specific surface area and favorable selectivity, in which silver ions and silver nanoparticles coexist. Experimental results indicate that this material achieves a maximum adsorption capacity of 100.05 mg g⁻ 1 and demonstrates exceptional removal efficiency across varying concentrations and environmental conditions. The adsorption process follows a pseudo-second-order kinetic model and Langmuir isotherm, highlighting the ability of the material to reach adsorption equilibrium rapidly, within approximately 40 min, upon contact with bromide ion solutions. This research not only showcases the potential of TpPa-SO 3 Ag as an efficient adsorbent for bromide ions but also offers new insights into the application of COF in environmental remediation. These findings pave the way for the development of effective water treatment materials and promote the broader application of COF materials in environmental science.
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
Catalysis Science & Technology
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2023
·Vol. 14
·期 3
·590-597
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IF 5
Guanglu Xia,Jianhao Qiu,Dingliang Dai,Yong Tang,Zhonghao Wu,Jianfeng Yao
A covalent organic framework (COF) named TpPa-1 was co-modified by chlorine grafting and ZnIn2S4 integration for concurrent photocatalytic H2O2 generation and wastewater purification under visible light. The introduction of electron-withdrawing chlorine groups on TpPa-1 decreases the density of adjacent electron clouds, which promotes the charge carrier separation and the intimate combination with ZnIn2S4 by Cl–Zn/Cl–In bonds, providing an appreciably enhanced photocatalytic activity. Specifically, in pure water, the optimal ZnIn2S4/TpPa-Cl2 sample can achieve a H2O2 yield of 766 μmol L−1, which is 1.5, 2, 7.8 and 5 times those of ZnIn2S4/TpPa-1, TpPa-Cl2, ZnIn2S4 and TpPa-1, respectively. In the tetracycline solution, 95% of tetracycline was degraded and, concomitantly, H2O2 with a yield of 846 μmol L−1 was generated. It is found that H2O2 generation undergoes a two-step O2 reduction with ·O2− as the intermediate, while ·O2−, holes and ·OH are the active species in tetracycline degradation. Likewise, other common pollutants like o-nitrophenol, acid golden yellow and acid red in wastewater could also be effectively degraded along with the appreciable production of H2O2, which realizes the so-called wastewater valorization. This study could advance COF-based photocatalysts and provide a novel insight into wastewater treatment.
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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2024
·Vol. 191
·期 3
·1-11
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IF 5.3
Liu Huamin,Li Chenghong,Wang Lina,Fang Lichao,Huang Hui,Deng Jun,Hu Yue,Li Mimi,Ran Xiaoping,Li Lulu,Zheng Junsong
A “signal-off” photoelectrochemical (PEC) sensing platform has been designed for the ultrasensitive detection of DNA methylation levels and multiple methylated sites. The platform employs tungsten trioxide and TpPa-1-COF loaded by gold nanoparticle (AuNPs@WO 3 @TpPa-1-COF) composite material as the photoactive component and p-type reduced graphene (rGO) as an efficient quencher. The PEC signal of AuNPs@WO 3 @TpPa-1-COF composite is effectively quenched in the presence of p-type rGO, because p-type rGO can compete with AuNPs@WO 3 @TpPa-1-COF to deplete light energy and electron donors. In addition, a hybrid strand reaction (HCR) amplification strategy fixes more target DNA and then combines with rGO-modified anti-5-methylcytosine antibody to facilitate ultrasensitive DNA methylation detection. Under optimal conditions, DNA methylation can be measured within a linear concentration range of 10 –14 to 10 –8 M, with an exceptionally low detection limit of 0.19 fM (S/N = 3). At the same time, the platform can conduct quantitative determination of multi-site methylation, with the linear equation △I = 44.19Log A + 61.43, and the maximum number of methylation sites is 5. The sensor demonstrates high sensitivity, excellent selectivity, and satisfactory stability. Furthermore, the proposed signal-off PEC strategy was successfully employed to detect DNA methylation in spiked human serum samples, with recoveries ranging from 93.17 to 107.28% and relative standard deviation (RSD) ranging from 1.15 to 5.49%. Graphical
研究领域:
生物化学
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分析化学
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材料科学
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DOI
PubMed
高影响因子
eScience
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2023
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IF 0
Yuxuan Wang,Wen Chen,Jingchao Fu,Yueli Liu
Adsorbent-assisted air water harvesting (AWH) may help alleviate the current global freshwater scarcity crisis. However, the weak sorption capacity of various adsorbents and the high energy required to release water are two long-standing problems. Herein, we propose a class of green and clean adsorbent, TpPa-1@LiCl composite, whose sorption capacity is greatly improved to 0.37 and 0.80 g g −1 under 30% and 90% relative humidity (RH), respectively, and which has excellent stability, showing only a slight decrease (0.79%) after 10 sorption–desorption cycles (1400 min). This TpPa-1@LiCl composite can reach equilibrium within 2 h and undergo complete desorption in 30 min under air mass 1.5 G irradiation. A corresponding solar-driven AWH device can complete up to 4 sorption–desorption cycles per day, with each cycle capable of collecting 0.34 g g −1 water without additional energy input, which implies TpPa-1@LiCl composite has the potential for achieving sorption-assisted AWH with high efficiency and rapid cycling.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
Journal of Water Process Engineering
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2024
·
IF 6.3
Qifeng Fan,Mengzhu Li,Zixun Li,Shusu Shen,Ganwei Zhang,Dapeng Liu
Fully utilizing the unique characteristics of COFs in surface-modified membranes is an ongoing research focus. Current challenges include ensuring the stability of the COFs separation layer on the membrane surface and developing environmentally friendly production methods for COFs surface-modified membranes. In this study, a simple room-temperature synthesis method was employed to prepare an aqueous colloidal solution of TpPa-SO 3 H. Subsequently, TpPa-SO 3 H nanosheets were loaded onto a hydrophobic PVDF membrane using vacuum filtration, resulting in the TpPa-SO 3 H/PVDF membrane. This green and efficient modification method yielded a defect-free TpPa-SO 3 H layer on the membrane surface, exhibiting excellent hydrophilicity (water contact angle of 50.8°). For dye separation, the TpPa-SO 3 H/PVDF membrane (F2) demonstrated high rejection rates (>98 %) for most dye molecules, along with good recyclability and filtration stability. Even after exposure to extreme acidic conditions, the separation performance of the modified membrane remains consistent, showcasing remarkable acid resistance. Furthermore, the prepared modified membranes exhibited effective photocatalytic degradation of various dyes (>90 %) as well as excellent stability and reusability. The modified membrane has shown significant self-cleaning effects in the three cycles of photocatalytic self-cleaning performance testing. This effectively demonstrates its potential in the domain of photocatalytic self-cleaning, exhibiting its capabilities and viability in the respective field.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Die Deng,Shaohua Wen,Ya Wang,Jia Liu,Fang Li,Xiupei Yang
Cerium dioxide (CeO 2 ) has usually been used as a catalyst for colorimetric assays. However, the low catalytic efficiency has limited their further application. Covalent organic frameworks (COFs) have sparked increasing interest in the unique properties of large surface area, high porosity, and good thermochemical stability. Herein, a novel covalent organic framework composite (TpPa@CeO 2 ) with dual mimic enzyme activities (oxidase and peroxidase) was successfully synthesized via a facile hydrothermal method. TpPa@CeO 2 showed higher catalytic activity than CeO 2 . The excellent catalytic performance of TpPa@CeO 2 could be attributed to the higher surface area, more surface active species and higher Ce 3+ /Ce 4+ ratio in the composite than CeO 2 . Based on this, a visual and sensitive colorimetric sensor was constructed to detect ascorbic acid (AA) in the linear range of 0.2–35 μM with a low detection limit (LOD) of 0.061 μM. Moreover, the excellent colorimetric sensor was successfully applied to detect AA in beverage and tablet samples with satisfactory recoveries ranging from 95.78 % to 100.84 %. The catalytic mechanism could be that the composition of TpPa and CeO 2 improved the ratio of Ce 3+ /Ce 4+ , which promoted the decomposition of dissolved oxygen and H 2 O 2 by CeO 2 to produce superoxide radicals (·O 2 – ) and hydroxyl radicals (·OH), respectively. The facile and sensitive sensor system constructed by TpPa@CeO 2 with promising applications provides a new platform for the detection of AA in real sample analysis.
研究领域:
材料科学
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分析化学
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生物医学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
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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
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Qifeng Fan,Zixun Li,Mengzhu Li,Xiaoji Zhou,Ganwei Zhang,Shusu Shen
Covalent organic frameworks (COFs) have been widely studied in membrane separation technology due to their high porosity, high specific surface area, and tunable pore size. However, COF particles tend to aggregate in blend membranes. In this study, in-situ generation of 2,4,6-Triformylphloroglucinol p-Phenylenediamine (TpPa) was carried out in Polyvinylidene fluoride/N,N-dimethylacetamide (PVDF/DMAc), followed by nonsolvent-induced phase separation (NIPS) method to obtain TpPa/PVDF membranes. The introduction of hydrophilic TpPa resulted in improved hydrophilicity and increased roughness of the membrane. During the filtration of dyes including Methylene Blue, Congo Red, and Eriochrome Black T, the TpPa/PVDF membrane exhibited high rejection rates (>90 %) and improved permeation flux (6–8 times of the original PVDF membrane). Investigation of its photocatalytic ability revealed that the TpPa/PVDF membrane exhibited excellent photocatalytic degradation of dyes, making it suitable for self-cleaning of fouled membranes and allowing for multiple reuse (up to 8 times). In the 6-cycle filtrations of Bovine Serum Albumin (BSA) and Humic Acid (HA), the membrane showed not only high rejection and permeation but also superior flux recovery rate (FRR), indicating good anti-fouling ability. This study has achieved efficient treatment of dye wastewater through membrane separation technology and has provided a novel anti-fouling COFs-modified membrane with photocatalytic self-cleaning ability.
研究领域:
材料科学
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环境科学
·
膜分离技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guanglu Xia,Jianhao Qiu,Shengwang Gong,Dingliang Dai,Biyao Fang,Yixin Li,Jianfeng Yao
Specific intermolecular interactions are the keys to constructing benign interfacial compatibility, which determines the activities of hybrid photocatalysts. In this study, CdS/TpPa-Cl 2 /MXene hybrids were compactly developed through the mediation of chlorine groups in TpPa-Cl 2 with MXenes and CdS. Owing to the formation of the Schottky junction between TpPa-Cl 2 and MXene and the heterojunction between TpPa-Cl 2 and CdS, as well as the close interfacial contacts among them, the photogenerated electron–hole pairs are effectively separated, which ultimately results in efficient photocatalytic activities. For visible-light-driven H 2 O 2 production in ambient air and pure water, CdS/TpPa-Cl 2 /MXene hybrids could achieve a high H 2 O 2 yield of 1005 μmol·L –1 , which is 2.5, 9.7 and 6.5 times greater than those of pure TpPa-Cl 2 , MXene and CdS, respectively. The mechanism investigation revealed that an indirect O 2 reduction pathway with ·O 2 – as an intermediate occurred for H 2 O 2 production over the CdS/TpPa-Cl 2 /MXene composites, and this two-electron O 2 reduction process was manifested as the primary way. This study provides insight into the construction of multi-component composite photocatalysts with high efficiency on the basis of covalent organic frameworks.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）