NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 5
·2189-2197
·
IF 3.591
Yangyang Xin,Dechao Wang,Dongdong Yao,Hailong Ning,Xiaoqian Li,Xiaoqian Ju,Yichi Zhang,Zhiyuan Yang,Yahong Xu,Yaping Zheng
Porous liquids (PLs), a new class of materials with permanent pores and macroscopic flowing behaviors, have attracted much attention for CO2 capture. However, the preparation of PLs is always complicated, which is not suitable for the scale-up. Herein, we propose a rather simple and feasible strategy based on post-synthetic modification of pore generators and the like-dissolves-like principle to synthesize UiO-66-PLs with low-viscosity. To be specific, the metal–organic framework (MOF) UiO-66 with hydroxyl groups (denoted UiO-66-OH) was modified by an organosilane (denoted KH550 or SID) via a post-synthetic modification method, obtaining the pore generator UiO-66-OS (denoted UiO-66-KH550 or UiO-66-SID). Then, the UiO-66-OS was dispersed into two different sterically hindered polydimethylsiloxane solvents (PDMS400 or PDMS6000). Thereby, a series of type 3 PLs (UiO-66-PLs) with superior fluidity at room temperature and accessible porosity were obtained. For instance, the viscosities of UiO-66-KH550-PDMS400 and UiO-66-SID-PDMS400 were 1.1 and 1.5 Pa S at 25 °C, respectively, which were far lower than those of values reported thus far. In addition, gas sorption–desorption measurements indicated that the UiO-66-PLs exhibit superior CO2 sorption performance and great potential for CO2/N2 separation. Moreover, molecular simulation was carried out to verify the retained accessible porosity. Notably, the strategy of constructing type 3 PLs based on the post-synthetic modification of MOFs with organosilane and the like-dissolves-like principle not only provides a new solution for the development of low-viscosity PLs, but also opens a new path for the construction of other types of advanced porous material (APM)-based (e.g., covalent organic frameworks (COFs), porous organic cages (POCs)) PLs, which have potential applications in the fields of gas trapping storage, and catalysis.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Fan Xiao,Ming Cao,Yingbo Chen
The synthesis of ultra-thin, uniform and continuous polyamide (PA) membranes is a crucial prerequisite for enhancing their desalination performance. Research has indicated that effectively slowing down the interfacial polymerization (IP) reaction and promoting the interface stability are key strategies for achieving ultra-thin, uniformly nano-structured membranes with excellent performance. Herein, we have demonstrated the successful design of a continuous and uniform PA membrane, ranging from 10 to 20 nm, by utilizing the UiO-66-(OH) 2 n-hexane dispersion as a transition layer to regulate IP reaction and enable efficient water-salt separation. The results showed that the presence of the transition layer facilitated a bidirectional diffusion-contact reaction between the two monomers, resulting in improved interface stability and alleviating the occurrence of severe IP that may lead to heterogeneous membrane structures. As a result, the PA active layers formed through this approach exhibited superior thinness and uniformity compared to those produced via traditional IP methods. Moreover, the transition layer enabled uniform pre-polymerization of UiO-66-(OH) 2 at the reaction interface by pre-exposing it to down-diffusing acyl chloride monomers. This ensured the continuity of membrane structure while creating additional free volume within the membrane. This work presented a scalable method for manufacturing ultra-thin, defect-free, homogeneous, and high-performance nanofiltration membranes.
研究领域:
材料科学
·
膜技术
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化学工程
✓ 已验证
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 10
·106011
·
IF 2.07
Jie Yang,Bo Ruan,Wang Ni,Lung-Chang Tsai,Ning Ma,Dean Shi,Tao Jiang,Fang-Chang Tsai
Carbon dots (CDs) has been widely applied in LED diodes, sensing and bioimaging. However, the fluorescence property of CDs is limited because of the solid-state aggregation-caused quenching (ACQ). Metal-organic frameworks (MOFs), due to their high surface area, porosity and tunable pore size, are considered suitable hosts to inhibit the ACQ of CDs. Herein, the Zr-MOFs (UiO-66-(OH)2) is chosen as a host to encapsulate CDs. The dual-emitting CDs@MOFs system is constructed, which overcomes the problem of solid-state aggregation-caused quenching of carbon dots to gain the blue-emitting CDs@UiO-66-(OH)2. With the volume of CDs increased, the fluorescence of CDs@UiO-66-(OH)2 has changed simultaneously. When the volume reaches 3 ml, CDs@UiO-66-(OH)2 begin to cause fluorescence quenching. The correlated color temperatures (CCT) of CDs@UiO-66-(OH)2 are transformed from cold light to warm light. That can be further researched in electroluminescent diodes, ion-sensor, environmental monitoring, biological imaging and developments in other related biochemical fields.
研究领域:
材料科学
·
生物成像
·
传感技术
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2025
·
IF 4
Zhang Chengpeng,Bei Pengzhi,Liu Hongjing,Zhao Xu,Shi Meiling,Jing Xiaochun,Li Zhao,Yao Hui
A novel porous liquid, M2070-UiO-66-OH@[BMim][PF 6 ], has been synthesized using zirconium-based metal–organic framework (UiO-66-OH), 1-butyl-3-methylimidazolium hexafluorophosphate ([BMim][PF 6 ]) and polyetheramine M2070. To enhance the CO 2 separation performance, M2070-UiO-66-OH@[BMim][PF 6 ] was incorporated as a filler into a mixed matrix membrane (MMM) using polyether block amide (Pebax-1657) as the membrane matrix. The properties of the synthesized M2070-UiO-66-OH@[BMim][PF 6 ] and the resulting MMMs have been characterized through FTIR, TGA, DSC, and SEM analyses. The results of porous liquid stability revealed that grafting polyetheramine M2070 onto the surface of UiO-66-OH@[BMim][PF 6 ] significantly increased the steric hindrance, thereby preventing agglomeration within the membrane. Additionally, the functional groups (amino and ether) present in M2070-UiO-66-OH@[BMim][PF 6 ] contributed to an increased number of active sites for CO 2 adsorption, facilitating enhanced CO 2 transport through the membrane. Compared to the Pebax membrane, the MMM containing 3% M2070-UiO-66-OH@[BMim][PF 6 ] exhibited significantly improved CO 2 permeability of 104.07 Barrer (an increase of 73.22%) and CO 2 /N 2 selectivity of 92.37 (an increase of 148.95%) at 30 °C and 0.3 MPa, surpassing the 2008 Robeson upper bound. These findings suggest that M2070-UiO-66-OH@[BMim][PF 6 ] is a highly promising additive for the fabrication of mixed matrix membranes with superior CO 2 separation performance. Graphical abstract A porous liquid, (M2070-UiO-66-OH@[BMim][PF 6 ]) has been prepared using UiO-66-OH@[BMim][PF 6 ] as the core and polyetheramine M2070 as the canopy. Afterwards, M2070-UiO-66-OH@[BMim][PF 6 ] has been added to the Pebax matrix to prepare M2070-UiO-66-OH@[BMim][PF 6 ]/Pebax mixed matrix membranes, which have been subjected to gas separation studies.
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
ACS Omega
·
2025
·
IF 4.3
Tao Shen,Guodong Wu,Li Yin,Tianen Chen,JiYe Fan,Yuanhao Wang,Shifeng Wang
Developing efficient adsorbents for removal of organic pollutants and heavy metals is essential for environmental protection. In this study, a series of GO/UiO-66-(OH)2 composites were synthesized and characterized using XRD, FT-IR, and SEM, confirming enhanced thermal stability, reduced aggregation, and maintained crystallinity of UiO-66-(OH)2 due to GO incorporation. Batch adsorption experiments showed that GO increased the adsorption capacity, with GO-8/UiO-66-(OH)2 achieving 324.2 mg/g for diclofenac sodium (DCF) and 429.3 mg/g for Hg2+. DCF adsorption was primarily governed by physisorption, while Hg adsorption was chemisorptive, involving strong coordination with oxygen functional groups. Kinetic and isotherm studies revealed the suitability of the pseudo-second-order and Freundlich models, with thermodynamic analysis showing exothermic DCF adsorption and endothermic Hg2+ adsorption. The composites also exhibited high selectivity and stable regeneration, making them promising candidates for practical environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PLASMA SCIENCE & TECHNOLOGY
·
2025
·
IF 1.8
Ruiting Jian,Qirui Zou,Jianjun Yan,Bowen Liu,Lijun Sang,Zhongwei Liu
Cr(VI), a hazardous heavy metal pollutant found in wastewater, exerts detrimental effects on biological system and the human body. Efficient photocatalytic reduction of Cr(VI) to Cr(III) using high-performance materials offers a viable approach for chromium decontamination. In the current work, the defective UiO-66-(OH)2 with enhanced photocatalytic activity was developed by the plasma treatment. These defects not only triggered an expansion in mesoporous domains and increased the BET surface area of the UiO-66-(OH)2 system, thereby exposing more adsorption and photocatalytically active sites, but also created additional electron migration pathways, enhancing the separation of photogenerated e-/h+ pairs. When subjected to an operating power of 15 W, chamber pressure at 20 Pa, and a 300-second treatment period, UiO-66-(OH)2 exhibited a removal efficiency of 83 %. This work explored a novel way for the construction of the defective MOFs and broadened the utilizationation of MOFs in the fields of photoreduction of heavy metal ions in water.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Jian Jia,Mei-Ling Xu,Xiao-Jie Jiang,Li-Na Zhang,Xiao-Lei Lu,Jiang Zhu,Xin Cheng
The utilization of cement-stabilized iron tailings as pavement base necessitates rigorous scrutiny of heavy metal ion leaching, particularly under fluctuating environmental pH conditions. Given the insufficient capacity of cement to stabilize Cr(Ⅵ), this paper explores the integration of defect-engineered metal-organic frameworks (MOFs) as additives in cement-stabilized iron tailings to reduce Cr(Ⅵ) leaching. Results shows that the utilization of MOFs material mitigates Cr(VI) leaching in cement-stabilized iron tailings while enhancing their mechanical properties. The Cr(Ⅵ) leaching from samples with the addition of UiO-66-(OH)₂ and UiO-66-(OH)₂-D exhibited a substantial reduction of 60.2 % and 88.6 %, respectively. The stabilized mechanism is attributed to the strong affinity between Cr(Ⅵ) and hydroxyl groups in MOFs. Furthermore, UiO-66-(OH) 2 -D has a larger pore diameter to expose more hydroxyl groups, which greatly improves its adsorption performance for Cr(Ⅵ). Meanwhile, the unconfined compressive strength (UCS), splitting strength and compressive resilience modulus increased by 13.4 %, 35.1 % and 45.7 %, respectively. The mechanisms underlie that the MOFs enhanced the early hydration process and optimized of the pore size distribution within the solidified body. This study presents a viable and efficient approach for the sustained mitigation of Cr(Ⅵ) leaching within cement-stabilized iron tailings.
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
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Lei Xu,Yafen Zhou
Photocatalysts TiO 2 @UiO-66-(OH) 2 was successfully synthesized via an impregnation method for removal of formaldehyde under high pressure mercury lamp irradiation, and the photocatalysts were characterized by using a variety of analytical techniques. The characterized results indicated that TiO 2 was attached to the surface of UiO-66-(OH) 2 , and there was a strong electronic interaction between the elements of TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , high dispersion of TiO 2 and efficient interfacial charge transfer between UiO-66-(OH) 2 and TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. And the hydroxyl radicals (⋅OH) and superoxide radicals (⋅O 2 − ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 20TiO 2 @UO (1 g 0.15 m 3 ) is 83.01 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 91.49 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst. This could provide a useful method for highly efficient formaldehyde in indoor air purification.
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Yafen Zhou,Lei Xu,Guofang Zhang
Photocatalysts UiO-66-(OH) 2 /MnO 2 -TiO 2 with intimate contact interfaces were successfully synthesized by impregnation methods and all of the composites were characterized by a variety of analytical techniques. The results indicated that MnO 2 and TiO 2 form a heterojunction and tightly attached to the surface of UiO-66-(OH) 2 , the generation of MnO 2 -TiO 2 heterojunction improved the catalyst electron-hole separation efficiency, and there was a strong electronic interaction between MnO 2 -TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , and efficient interfacial charge transfer between UiO-66-(OH) 2 and MnO 2 -TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. Meanwhile, the hydroxyl radicals (·OH) and superoxide radicals (·O 2 - ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 70UO/MnO 2 -TiO 2 (1 g 0.15 m 3 ) in self-made closed system under high pressure mercury lamp irradiation is 88.19 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 95.19 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst.
研究领域:
环境科学
·
材料科学
·
催化
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Song He,Junqing Zhu,Jiayi Tang,Jinfeng Ji,Yajun Huang,Ye Li
Metal-organic frameworks (MOFs) have become a focal point of interest owing to their ability to remove contaminants from wastewater. However, the typical powder form of MOFs is difficult to recover after use, which hinders their practical application. In this research, UiO-66-OH gel was synthesized at room temperature. On this basis, Co was doped into UiO-66-OH gel to obtain a series of Co@U-OH-X composites. The [email protected] exhibited an adsorption capacity for TC that was 5.1 times higher compared to the UiO-66-OH gel. Furthermore, the influence of pH, coexisting ions, humic acid, and original concentration of TC on the adsorption of [email protected] was examined. The composite materials demonstrated an exceptional capacity to adsorb TC (182.31 mg·g -1 ), which surpassed the performance of numerous previously documented adsorbents. The pseudo-second-order kinetic model and the Freundlich isotherm model efficiently accounted for the adsorptive interaction. Thermodynamic adsorption analyses indicated that the interaction occurred spontaneously and accompanied by heat absorption. After four cycles, there was only a 12.7% reduction in the removal rate of TC, which suggested that the composite materials were recyclable. [email protected] showed remarkable adsorption capacity even in settings with minimal TC concentration. The exceptional adsorptive performance, superior recyclability and aqueous stability established Co@U-OH-X composites as a viable adsorbent contender for eliminating TC.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Hai-Long Jiang,Na Li,Xia Wang,Xiang-Yu Wei,Ru-Song Zhao,Jin-Ming Lin
A zirconium-based metal-organic framework material (UiO-66-OH) was designed and applied for the first time as an adsorbent in food analysis for the solid phase microextraction of trace polybrominated diphenyl ethers (PBDEs) from milk. The materials were characterized by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analyses. Through response surface methodology, the optimal conditions for adsorption were determined to as follows: extraction time of 30 min, ionic strength of 15%, extraction temperature of 61 °C, and stirring speed of 880 r/min. Under the optimal conditions, the method showed excellent linearity with a high correlation coefficient ( r ≥ 0.9994), low limits of detection in the range of 0.15–0.35 ng L −1 , good interday precision ranging of 7.58%-9.48%, and satisfactory recoveries of 74.7%-118.0%. All these findings showed that the method was reliable and effective for detecting trace PBDEs in milk.
研究领域:
食品分析
·
环境化学
·
材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 23
·9663-9668
·
IF 2.5
Wenhui Yao,Yongkui Chen,Xiaowei Guo
With the wide application of gold as a high-value resource, the recycling of gold has received considerable attention. Owing to the functional active sites, tunable pore size and designable structures, metal–organic frameworks (MOFs) have aroused significant curiosity in gold-recycling. However, designing MOFs with both remarkable adsorption capacity and selectivity for Au(III) is highly desirable but challenging. In this work, two hydroxy-modified UiO-66-type MOFs: UiO-66-(OH)2 and UiO-66-OH have been prepared for rapid and selective adsorption of gold ions from aqueous solution. Significantly, UiO-66-(OH)2 was found to exhibit a remarkable gold adsorption capacity of 1570 mg g−1 (pH = 6) compared with UiO-66-OH (520 mg g−1) under uniform conditions. Furthermore, UiO-66-(OH)2 still exhibited excellent gold adsorption efficiency in the presence of other interfering ions. Mechanism analyses revealed that Au(III) was partly transformed to Au(0) by the reducing action of –OH on the framework in the gold adsorption process. Importantly, the MOF materials can be well regenerated by soaking in hydrochloric acid–thiourea aqueous solution.
研究领域:
材料科学
·
环境化学
·
无机化学
·
可持续资源回收
✓ 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）