INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Kangxin Bai,Yang Liu,Zhuangzhi Li,Jiajie Shi,Zhenggong Wang,Jian Jin
The separation of C2H4/C2H6 is crucial for the efficient production of C2H4. The energy-efficient membrane technology has great potential in this separation. However, the similar physical properties of the two molecules make them extremely difficult in membrane separation. Herein, a series of nanosized MOF-808 particles were incorporated into a polyimide matrix to fabricate mixed matrix membranes (MMMs) for C2H4/C2H6 separation. The well-defined pore architecture of MOF-808 enables effective C2H4 purification through molecular sieving, while the restricted diffusion of C2H6 molecules within the MOF-808 channels facilitates remarkable kinetic separation. Importantly, the nanosized MOF-808 can be dispersed more evenly in the polymer matrix, significantly improving the compatibility between the polymer matrix and filler, thereby maximizing the sieving effect of MOF-808. The resulting nanosized MOF-808-based MMM demonstrates a high C2H4 permeability of 1187 barrer and a C2H4/C2H6 selectivity of 2.8, which has exceeded most of the MMMs reported so far and surpassed the 2013 upper bound. Our MMMs also show excellent long-term stability and antiplasticization performance. Our work highlights the effectiveness of enhancing the separation performance of MMMs by using reducing nanosized MOF-808, providing valuable insights for the design of MMMs for C2H4/C2H6 separation.
研究领域:
膜技术
·
气体分离
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Carbon Capture Science & Technology
·
2023
·
IF 0
Chaoqi Ge,Menglong Sheng,Ye Yuan,Fei Shi,Yi Yang,Song Zhao,Jixiao Wang,Zhi Wang
Mixed matrix composite membranes (MMCMs) are considered as one of the potential directions for the development of CO 2 capture membranes. Nevertheless, the high cost and the challenging nature of improving separation performance are significant obstacles that prevent MMCMs from being widely applied in practice. In this study, we developed a cost-effective modified pore-optimized MOF-808 (MOF-808@PVAm) and utilized it to fabricate high-performance CO 2 capture MMCMs. Specifically, MOF-808 and polyvinylamine (PVAm) were cross-linked by γ-(2,3-epoxypropoxy) propytrimethoxysilane (KH-560), which improved the pore structure characteristics of MOF-808 and led to high-performance MMCMs. For 2 bar feed gas (CO 2 /N 2 , 15/85), the MMCM with 33.33 wt.% MOF-808@PVAm loading displayed remarkable CO 2 permeance of 2753 GPU and selectivity of 181. The prepared MMCM demonstrated good operational stability in simulated flue gas and exhibited potential for application in various gas purification fields (CO 2 /CH 4 , CO 2 /H 2 ) through gas permeation tests.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·
IF 1.8
Luyu Wang,Song Jia,Ruan Chenghai,Yu Chunyang
Abstract Identifying trace levels of perfluorooctane sulfonate (PFOS) at parts per trillion (ppt) in water remains a formidable task. Here, we fabricated MOF-808 through rapid microwave synthesis. Characterization of the synthesized MOF-808 involved techniques including XRD, FT-IR, SEM, and nitrogen sorption analysis. We integrated the MOF-808 as the sensing layer in a quartz crystal microbalance (QCM) sensor, specifically tailored for PFOS detection in water. Our findings revealed that the QCM sensor can detect 10 ppt of PFOS when the frequency shift is approximately 90 Hz within 50 s. Moreover, the continuous response, selectivity, and anti-interference capability of the sensor were systematically explored. This study introduces a pioneering approach for detecting ppt concentrations of PFOS in water, offering significant prospects for future applications and dissemination.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lunbo Xu,Yu Liu,Wei Wang,Shusu Shen,Ganwei Zhang,Renbi Bai
Metal-organic frameworks (MOFs) possess various beneficial potentials, including the ability to enhance the porosity and water flux of membranes, and assist in the catalysis of the photodegradation of organic compounds such as dyes, through the interactions of the metal ions within MOFs. In this study, a MOF-808/polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) was constructed using the non-solvent induced phase separation (NIPS) method, in which, an ionic liquid, 1-butyl-3-methylimidazolium chloride was introduced as the co-solvent in the casting solution solvent, to increase the dispersibility and blending ratio of MOF-808 particles in the mixture. The optimal membrane with 1.5 wt% MOF-808 exhibited ultra-high water permeability (58.08 L·m⁻²·h⁻¹·bar⁻¹) and excellent rejection for various dyes (>90 %). The ESR spectroscopy test has proved the existence of •O 2 - and •OH in MOF-808/PVDF membrane under light irradiation, and the membrane exhibited outstanding photocatalytic self-cleaning ability, achieving a Congo Red (CR) degradation efficiency of 96.57 % under light exposure. Moreover, even after five photocatalytic self-cleaning cycles, the membrane flux almost recovered to its initial state, and the membrane maintained good CR rejection (>90 %). These observations provide ideas for developing high flux membrane technologies with photocatalytic capabilities, which will be applied for efficient treatment of practical dye wastewater.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Tongtong Gao,Cuicui Li,Wenyu Bai,Yu Luo,Di Yu,Shuang Wang
The composite membrane (sPBI–MGE-x) is prepared by introducing MOF-808-grafted ethylenediaminetetraacetic acid (EDTA) into the sulfonated polybenzimidazole (sPBI) with a sulfonation degree of 50. MOF-808, one of Zr-based metal organic frameworks, has tunable pore size, plenty of pathways for proton transport, and superior acid stability. After MOF-808 is grafted by EDTA, the obtained MOF-808-EDTA (MGE) has the amino and carboxyl groups, which can provide additional proton transport channels and the acid–base pair effect between amino and sulfonic acid groups can further strengthen the interaction between MGE and sPBI. Therefore, compared with the pristine sPBI membrane (12.5 mS cm–1), the sPBI–MGE-2 composite membrane exhibits high proton conductivity (30.8 mS cm–1) and remarkable energy efficiency (83.81%) largely at 60 mA cm–2.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 36
·期 3
·e6556
·
IF 4.105
Wen-Jing Qiu,Ming-Wu Gao,Qi Chen,Ao Zheng,Yi-Jia Shi,Xin Liu,Juan-Hong Li,Guo-Liang Dai,Yang Hu,Zi-Xia Lin
Under normal temperature and pressure, a novel improved Fenton system that was named MHACF-MOF-808(Zr) was constructed after the introduction of Pd/MOF-808(Zr) and H 2 to solve the inherent problem of the production of iron sludge in the classic Fenton system. Only trace amount of Fe II was required during the whole reaction because Fe III could be rapidly reduced by the active hydrogen derived from the adsorption and activation of H 2 on the surface of Pd/MOF-808(Zr) composite. The concentration of Fe II could be maintained more than 10 μM. The removal of target pollutant sulfamethazine in this system was mainly relied on the degradation of ·OH verified by both of the direct detection and indirect inhibition (using methanol). By using the calculation of Laplacian bond order, the degradation pathway of sulfamethazine followed by the cleavage of N S bond. This prediction was verified by the detection of intermediate products. Only 21% sulfamethazine could be degraded after 3-h reaction in the classic Fenton reaction system, while it could be thoroughly degraded in 1.5 h in the MHACF-MOF-808(Zr) system. The influence of main parameters on the degradation effect of sulfamethazine, such as initial pH, the flow of H 2 , dosage of Pd/MOF-808(Zr), concentration of sulfamethazine, ferrous, and hydrogen peroxide, were systematically studied. Based on the relative stability of Pd/MOF-808(Zr) confirmed by the morphological characterization, sulfamethazine could be efficiently degraded in the MHACF-MOF-808(Zr) system.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Qiuju Fu,Dandan Liu,Weijing Niu,Shuo Zhang,Ruihua Chen,Yujia Wang,Pengze Zhao,Huimin Jiang,Yanchao Zhao,Lingzhi Yang,Liting Yan,Haiyan Wang,Xuebo Zhao
The highly efficient production of furfuryl alcohol (FFA) from biomass-derived furfural (FFR) is attracting increasing attention due to its wide application in the production of value-added chemicals. Zr-based MOF-808 is promising for liquid catalytic transfer hydrogenation (CTH) of FFR to FFA in terms of possessing a great number of Lewis-acid sites. Herein, a series of defective MOF-808 (D x -MOF-808) samples were prepared via a competitive coordination-removal strategy by modulating with benzoic acid (HBC). HBC was introduced as the temporary ligand for competing with formal ligand 1,3,5-benzenetricarboxylic acid (H 3 BTC) to coordinate with metal clusters and then it was removed with methanol to obtain the D x -MOF-808. The results showed that HBC serves not only as a temporary ligand participating in the synthesis of MOF-808 to obtain defective structure but also as a modulator controlling the particle size by terminating the growth of crystals. By changing the amount of HBC addition, the degree of ligand deficiency and the number of exposed Zr sites can be well regulated. Especially, excellent performance of FFR conversion (99%), FFA selectivity (94.4%) and FFA formation rate (48.6 mmol·g −1 ·h −1 ) was achieved over D 40 -MOF-808 sample with 2-propanol as a hydrogen donor under mild conditions (90 °C, 2 h), ranking it the best among the reported catalysts. Detailed characterizations proved that the high activity of D 40 -MOF-808 was jointly influenced by the high surface area, the high content of exposed Zr metal sites and ligand deficiency.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Mingming Song,Xianghai Song,Xin Liu,Weiqiang Zhou,Pengwei Huo
The design of a heterogeneous structure for photocatalysts has attracted significant attention. In this study, a step-scheme (S-scheme) heterojunction was designed using an in-situ synthesis method. The resulting heterojunction comprised 3D microspheres of ZnIn 2 S 4 and octahedral MOF-808 (ZnIn 2 S 4 /MOF-808). During this process, we investigated the impact of the scale of the ZnIn 2 S 4 microspheres on performance by controlling the growth of the ZnIn 2 S 4 microspheres with various scales. The maximum catalytic activity was discovered to be achieved with ZnIn 2 S 4 microspheres of 6 µm when coupled with MOF-808. Compared to pure ZnIn 2 S 4 and MOF-808, the fabricated S-scheme ZnIn 2 S 4 /MOF-808 heterojunction exhibited notably improved photocatalytic CO 2 reduction performance. The performance of the CO yield of the optimized sample could reach 8.21 μmol g −1 h −1 , which was approximately 10 and 8 times higher than those of ZnIn 2 S 4 (0.84 μmol g −1 h −1 ) and MOF-808 (1.03 μmol g −1 h −1 ), respectively. Moreover, ultraviolet photoelectron spectroscopy, ESR, in situ X-ray photoelectron spectroscopy, and density functional theory calculations were used to study the charge transfer mechanism of the S-scheme heterojunction. In-situ FT-IR investigation established the Carbene pathway as the source of CO production (CO 2 → CO 2 * → COOH* → CO* → CO). This study provides an efficient method for designing an S-scheme heterojunction for photocatalytic CO 2 reduction.
研究领域:
材料科学
·
催化
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yu Tao,Baogang Yang,Fengyan Wang,Yanghao Yan,Xianyong Hong,Haihua Xu,Mingzhu Xia,Fengyun Wang
In this work, a facile and green method is applied to synthesize hydrophilic MOF-808(Zr) and modulate its defect content and particle size using different amounts of iron nitrate (denoted as F) to obtain serial XF-MOF-808 (“X” implied the dosage of used F). The development of additional adsorption sites and the fine-tune of pore and particle size based on MOF-808 significantly improved phosphate adsorption performance. In particular, the 0.5F-MOF-808 shows excellent adsorption capacity (305.5 mg/g) and rapid diffusion rate (37.51 mg/g·min 0.5 ) for phosphate at 298 K and initial pH = 6.5, outperforming pristine MOF-808 and most previously reported adsorbents. 0.5F-MOF-808 possesses a wide pH tolerance, outstanding reusability and excellent selectivity for phosphate adsorption from simulated wastewater, verified in environmental implication and regeneration experiments. Phosphate loaded on the adsorbent can be converted to struvite for agricultural fertilizer via a simple crystallization process. Compared to MOF-808, the exceptional sorption performance of 0.5F-MOF-808 is supported by decreased internal diffusion limitation, enlarged pore size and the development of new adsorption sites, which can be proved by advanced characterizations and batch adsorption experiments. This work presents a promising modification strategy of MOF materials for phosphate adsorption and recovery.
研究领域:
环境科学
·
材料科学
·
水处理
·
可持续化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 34
·16584-16592
·
IF 3.925
Yingdi Wang,Liangliang Lin,Yuming Dong,Xiang Liu
The MOF-808/AgI (MA) photocatalyst was synthesized through a plain ion-exchange precipitation means. The crystalline phase structure, microcosmic appearance, elemental composition and optical performance of the catalyst were tested by XRD, SEM, TEM, XPS, UV-vis DRS, EIS, PL and ESR techniques. Tetracycline hydrochloride (TC) was selected as the simulated contaminant for photodegradation experiments to estimate the photocatalytic properties of the as-prepared materials. The results suggested that the degradation performance of the MA compounds was significantly enhanced, and the composite with a AgI loading of 40% (MA-40) showed the best degradation performance with a 93.65% degradation rate in 80 min. Furthermore, the radical capture experiments proved that ˙O2−, 1O2 and h+ were the principal active intermediates in the photochemical catalysis process. Therefore, it can be speculated that the loading of AgI enhanced the visible light absorption and a Z-scheme heterojunction between the two components was formed, which promoted the separation of photogenerated carriers.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Youyu Cao,Mengshuo Du,Fei Han,Xueli Luo,Weixia Yang,Wanmei Lin,Yingying Wang,Wenzhi Tang,Zhonghong Li
Pb(II) removal from water is essential for human health due to their high toxicity and carcinogenicity. Metal-organic frameworks (MOFs) have potential to remove heavy metal ions because of their adjustable structure and tunable pore size. However, the microporous structure limits their removal performance because Pb(II) mainly exists in water as hydrated ion, which is larger than the pore size of MOFs. Defect engineering is promising to form suitable pore to capture Pb(II). Herein, we developed an etched Cu 0.3 Zr 0.7 -MOF-808 MOF by a mixed-metal strategy followed with an etching process. We replaced part of Zr 4+ in the MOF-808 skeleton with Cu 2+ through competition between Zr 4+ /Cu 2+ for coordinating with –COOH on 1,3,5-Benzenetricarboxylic acid (H 3 BTC) to increase its specific surface area. Then H 3 PO 4 and EDTANa 2 ·2H 2 O as etchants were used to break the coordinate bond between Zr 4+ /Cu 2+ and –COOH on H 3 BTC to achieve macroporous structure to inhabit Pb(II). The powder property of MOFs limits their practical applications due to their poor recyclability. We crosslinked the MOF on CMC by coordinating Zr 4+ on the MOF with –COOH on CMC to form aerogel to facilitate its recyclability. The maximum adsorption capacity for Pb(II) was 542.77 mg/g at 45 °C. The adsorption of Pb(II) conformed to the intra-particle diffusion model and the Langmuir model, illustrating that the adsorption process was monolayer adsorption and affected by intra-particle diffusion. The electrostatic attraction and chelation between Pb(II) and –COOH accounted for the effective Pb(II) removal performance. This work provides a novel idea for the removal of heavy metal ions from water.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Yeqing Jia,Yahui Wang,Meng Yan,Qian Wang,Houjun Xu,Xuesheng Wang,Huanying Zhou,Yulan Hao,Manman Wang
A novel magnetic metal organic framework composite (Fe 3 O 4 @MOF-808) was synthesized by a facile solvothermal method and applied as an adsorbent for the magnetic solid phase extraction (MSPE) of benzoylurea insecticides (BUs) from tea beverages and juice samples. The prepared materials were characterized using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), vibrating sample magnetometry measurements and N 2 adsorption-desorption experiments. The adsorption (adsorbent amount, extraction time and pH) and elution (elution solvent, elution volume and time) parameters were investigated in detail. Under the optimized experimental conditions, Fe 3 O 4 @MOF-808 exhibited simpler and better reusability than commercial C 18 , with an equivalent adsorption effect. Notably, π-π interactions, hydrophobic interactions and hydrogen bonding interactions contributed to the good adsorption of BUs by Fe 3 O 4 @MOF-808. Finally, a simple and sensitive method was established using Fe 3 O 4 @MOF-808-based MSPE coupled with high-performance liquid chromatography (HPLC). It provided low limits of detection (0.04–0.15 ng/mL), wide linear ranges (0.15–50 ng/mL) and satisfactory recoveries (84.6–98.3%). The proposed method was successfully applied for the fast and sensitive determination of BUs in tea beverages and juice samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）