TALANTA
·
2023
·
IF 6.1
Tongtong Hou,Yue Huang,Xin Wang,Xiaoling Hu,Ping Guan
The development of high-performance protein-imprinted materials remains challenging due to defects concerning high mass transfer resistance and non-specific binding, which are crucial for protein purification and enrichment. In this paper, lysozyme-imprinted mesoporous Zr-based MOF (mesoUiO-66-NH 2 @MIPs) with specific and selective recognition of lysozyme (Lyz) were prepared by surface imprinting technology. In particular, the excellent hydrophilicity mesoporous MOFs (mesoUiO-66-NH 2 ) with a pore size of 10 nm was prepared as a carrier for Lyz immobilization by an auxiliary modulation strategy to regulate the microporous structure of UiO-66-NH 2 with the propionic acid solution, enabling massive loading of the macromolecular protein Lyz. The mesoUiO-66-NH 2 @MIPs reached a maximum saturation adsorption of 206.54 mg g −1 on Lyz in 20 min at 25 °C with an imprinting factor of 2.57 and selection factors of 2.02, 2.34, and 2.45 for cytochrome c (Cyt c ), bovine serum albumin (BSA) and bovine hemoglobin (BHb), respectively. More importantly, the mesoUiO-66-NH 2 @MIPs could specifically recognize Lyz from the mixed protein system. The adsorption capacity of Lyz could still reach 78.55% after 5 cycles with good cyclic regeneration performance. This provides a new research option for developing and applying novel porous MOF in biomolecule imprinting technology and the specific separation of biomolecules.
研究领域:
生物材料学
·
蛋白质工程
·
分子印记技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Liu,Jia-Ji Liang,Wei-Ming Guo,Chao Chang,Xiao-Ming Duan,De-Chang Jia,Hua-Tay Lin
High-temperature thermal stability plays a crucial role in the structural application of pressureless liquid-phase sintered SiC (PLS-SiC) ceramics. In this paper, a PLS-SiC ceramic processed with CeO 2 –Al 2 O 3 as sintering additives with excellent high-temperature thermal stability was achieved by incorporating (Hf, Zr, Ta, Nb, Ti)B 2 (HEB) particles. Results showed that PLS-SiC ceramics with HEB-free underwent a structural change from dense to porous microstructure after annealing at 1800 °C/1 h. Conversely, PLS-SiC ceramics with the addition of 10 vol% HEB exhibited excellent thermal stability, as evidenced by the retention of their dense microstructure after exposure to annealing at 1800 °C/1 h. The possible primary reasons for this significantly different response to the thermal stability could be probably attributed to fact that HEB reacted with CeAlO 3 and SiC to form solid-phase products, subsequently inhibiting the formation of gas-phase products after decomposition of CeAlO 3 alone in a high-temperature vacuum environment. In addition, the formation of a compact protective outer layer containing Hf–Ta containing diboride in PLS-SiC ceramics during the annealing process could effectively hinder the volatilization of volatile substances at a high temperature.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jing Chen,Jiawen Li,Huanhuan Wang,Xincun Dou,Baiyi Zu
How to modulate the open metal sites (OMS) for enhancing the luminescence emerges as a significant issue to explore in the exploration of high-performance metal-organic frameworks (MOFs) for photoluminescence (PL) sensing and X-ray detection. Here, by efficiently extending the conjugation of the ligand, nanoscale Zr-ADIP, which has eight OMS per Zr cluster, was first synthesized and demonstrated to have enhanced PL and X-ray excited luminescence (XEL) performance. Furthermore, a modulator tuning strategy was adopted to occupy the OMS, which has been proven to be efficient for engineering the unoccupied electronic levels, promoting the relaxation of the excited electrons, and enhancing the PL efficiency. It is found that with benzoic acid as the modulator, the optimal nanoscale Zr-ADIP-BzOH exhibits superior performance with an X-ray detection limit of 0.53 μGy s–1, which is 10 times lower than the minimum X-ray dose rate requirement for medical X-ray imaging. The superior XEL performance of Zr-ADIP-BzOH has been further proven to be effective in the tentative monitoring of the morphology of a mature pearl in a clam sample by constructing a condensed film device. We expect that the proposed OMS introduction and modulator tuning strategy would offer insights for the structural design and performance enhancement of luminescent MOFs.
研究领域:
材料科学
·
光学
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 7
·685
·
IF 4.501
Hao Dong,Cheng-Hua Xu,Fang-Lu Yang,Lei Du,Chen-Long Liu,Wen-Jing Chen,Lin Wang
Ca–Zr–Sn composite oxides catalysts for 1,4-butanediol (BDO) selective dehydration to 3-butene-1-ol (BTO) are synthesized by impregnation and co-precipitation in the present work. The results show that Ca–Zr–Sn catalysts prepared from co-precipitation by using NaOH-Na2CO3mixing alkali solution as precipitant exhibit an excellent catalytic property for BDO dehydration to BTO. For instance, Ca–Zr–Sn oxide with Ca/Zr and Sn/Zr molar ratio of 0.68 and 0.28 calcined at 650 °C gives a BDO conversion and BTO selectivity of about 97% and 82%, respectively, and exhibits no deactivation during 1000 h scale-up experimental testing. X-ray diffraction results indicate that catalytic active centers for BDO dehydration to BTO are from Ca0.15Zr0.85O crystal phase. NH3- and CO2-temperature programmed desorption prove that the surface of obtained catalysts can provide a large amount of acid and base sites simultaneously. FT-IR spectra of pyridine-adsorbed samples show that acid sites on the surface of Ca–Zr–Sn oxide catalyst mainly exist in a state of Lewis acid, which activates terminal -OH groups of BDO molecule through complexing. The activated -OH interacts with β-H activated on base sites O2−anions relative to Ca species, thereby the CH2=CH- bonds are produced through dehydration to form BTO.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 14
·5159-5166
·
IF 8.262
Lijin Huang,Man He,Beibei Chen,Bin Hu
A facile preparation of magnetic MOF composites with flexible mercapto group pendants in their pores is realized through solvent-assisted ligand exchange (SALE) under mild conditions in water, and terephthalate in UIO-66 is replaced with mercaptoacetic acid (MAA). After the SALE processing, the crystallinity, porosity, and superparamagnetism of the mercapto functionalized magnetic Zr-MOF (MFC-S) are well maintained, and the obtained MFC-S exhibits a higher adsorption capacity (282 mg g−1) for Hg2+ than that of the magnetic Zr-MOF (MFC-O). Furthermore, the prepared MFC-S can be regenerated easily by liquid desorption after adsorption of metal ions and be reused more than 5 times without obvious decrease in removal performance. The proposed SALE method for the preparation of mercapto functionalized magnetic MOF composites (MFCs) is easy-to-operate and low cost, providing not only a reliable porous MFC platform for the removal of metal ions, but also a simple and efficient synthesis route for the preparation of functionalized MFCs which cannot be achieved through conventional approaches.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jian Chen,Jinbo Ouyang,Wenqian Chen,Zepeng Zheng,Zhen Yang,Zhirong Liu,Limin Zhou
Porous chitosan/Zr-MOF (UiO-66) composite foams (CSF@UiO-66) were facilely prepared by grafting UiO-66 into polymerized chitosan using epichlorohydrin as the linking agent. The flexible foams with high loadings of UiO-66 exhibited low density (15.0 ∼ 23.4 mg/cm 3 ) and superior liquid–solid separation performance. The hierarchical pores and abundant functional groups contributed to the effective removal of ketoprofen (KPF) from water by the composite foams, achieving a maximum adsorption capacity of 209.7 mg/g at pH 4, outperforming most reported adsorbents. Batch adsorption experiments demonstrated that the adsorption of KPF could be described by the Langmuir isotherm and pseudo-second-order kinetic model. Importantly, the composite foams showed excellent performance even in the presence of some ions and good reusability for engineering applications. Furthermore, density functional theory (DFT) calculations revealed that the adsorption mechanism between the composite foams and KPF could be attributed to hydrogen bonding and π-π interaction. In essence, this work provides an innovative strategy for the fabrication of a blocky composite foam with high loadings of MOF for efficient adsorptive removal of KPF in liquids, which can overcome the disadvantages of agglomeration due to small particle size and poor stability of MOFs.
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
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xuanhe Hu,Tian Huang,Shipeng Wang,Shangjun Lin,Zihao Feng,Lai-Hon Chung,Jun He
The shuttle effect of soluble polysulfides as one of the primary bottlenecks has retard the widespread use of lithium-sulfur (Li-S) batteries. In this work, a new functional separator coating composed of pristine zirconium metal-organic framework (Co-PCN-222) with catalytic cobalt-porphyrin linker decorated carbon nanotubes (PCN@CNT) was presented for addressing this problem. Benefiting from powerful adsorption and catalytic activity of the uniformly dispersed cobalt and nitrogen sites in porphyrin linkers as well as the fast electron transport network provided by highly conductive CNT, the polysulfide redox kinetics is greatly boosted and the shuttle effect is inhibited to a large extent. Accordingly, the Li-S batteries coupling with PCN@CNT coated separator delivers a specific capacity as high as 1157 mAh g −1 at 0.1 C, good rate capability with a reversible capacity of 696 mAh g −1 under 2 C as well as excellent cyclic performance with a low average capacity attenuation rate of 0.067% upon 500 cycles at 1 C. This work will open up great opportunities in the development of pristine MOFs-based separator coating for advanced Li-S batteries.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2015
·
IF 1.964
Tao Wu,Jingwei Wan,Xuebing Ma
Magnetic solid acid catalysts SO 4 2− /Zr(OH) 4 –Fe 3 O 4 were prepared using magnetic Fe 3 O 4 nanoparticles , ZrOCl 2 ·8H 2 O, and sulfuric acid as starting materials in the calcination temperature range 110–650 °C. The properties of the magnetic solid acid, such as loaded SO 4 2− content, acid distribution, surface morphology, and porous structure, were characterized. In the aqueous asymmetric aldol reaction of various benzaldehydes with strong electron-withdrawing groups (R = NO 2 and CN), good to excellent catalytic performance (83%–100% yield, 86.0%–95.6% ee anti , and anti/syn = 88–96/12–4) was achieved. These nanomagnetic solid acids can be quantitatively recycled from the reaction mixture using an external magnet and reused five times without significant loss of catalytic activity.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yijun Chen,Hailiang Yang,Sanjian Ma,Meina Cheng,Zixia Lin,Long Jin,Xin Liu
As a representative antibiotic, trimethoprim (TMP), the emerging pollutant has been frequently detected in water bodies, and its potential harm has aroused the attention of society. Although the emerging pollutant could be efficiently degraded by the advanced oxidation process (AOP) represented by the Fenton reaction , both the problem of iron sludge disposal and the safe use of H 2 O 2 have plagued the further promotion of this technology. The H 2 (precursor of the active hydrogen [H]) and catalyst Pd/UiO-66(Zr) were introduced into the Fenton reaction in this paper. It was found that the process of reducing Fe(III) and self-generating H 2 O 2 could be facilitated due to the reduction of [H]. Under certain reaction conditions (initial pH 3, trace total iron 25 μM, H 2 30 mL·min −1 , catalyst 2 g·L −1 ) and without H 2 O 2 , a Fenton-like system was constructed, named MHORF-UiO-66(Zr). While achieving zero iron sludge discharge, 100 % of 20 mg·L −1 TMP was rapidly degraded within 1 h. It was found that the degradation of TMP could be attributed to the attack of singlet oxygen and hydroxyl radical . Furthermore, the performance changes of catalyst before and after six rounds of reactions were studied and it was found that Pd/UiO-66(Zr) had excellent and stable catalytic performance.
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
RSC Advances
·
2020
·Vol. 10
·期 68
·41283-41295
·
IF 3.119
Ahmed S. Abou-Elyazed,Yinyong Sun,Ahmed M. El-Nahas,Ahmed M. Yousif
Recently, the incorporation of hydrophobicity on the surface of UiO-66(Zr) has received much attention due to the deactivation of hydrophilic active sites of UiO-66(Zr) upon water adsorption. In this work, we report UiO-66(Zr) catalysts with an assortment of surface hydrophobicities fabricated by the solvent-free method to elucidate the impact of the environment framing Lewis acid sites on their catalytic activity in the production of fatty acid methyl ester (biodiesel) via the esterification of fatty acids at room temperature with high selectivity (100%) and good recyclability. A detailed structural analysis of the materials by N2 sorption, FT-IR, SEM, XRD, water contact angle measurement, dynamic liquid scattering (DLS), NMR and TGA revealed the fabrication of stearic acid-grafted UiO-66(Zr) catalysts (10SA/UiO-66) with fine particle size and a highly hydrophobic network. 10SA/UiO-66(Zr) with enhanced hydrophobicity exhibited superior catalytic performance in the esterification of a fatty acid with a long alkyl chain compared with conventional solid acid catalysts and even liquid acid catalysts. Detailed kinetic studies corroborated that the adsorption of lipophilic acids at the Lewis acid sites besides the enhancement of wettability between the reactants was facilitated by the hydrophobic environment, thus significantly motivating the esterification reaction at room temperature. Furthermore, 10SA/UiO-66(Zr) showed good catalytic activity in the esterification of oleic acid in the presence of water (∼10% in the light of acid weight).
研究领域:
材料科学
·
催化化学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 16
·3812
·
IF 4.2
Yongwei Li,Zhihao Fang,Lijuan Feng,Fangfang Liu,Yucui Shi,Jiao Li,Chao Zhao
A series of Zr-TiO2catalysts were prepared using a facile sol-gel method and were used for N-methylmorpholine (NMM) oxidation to N-methylmorpholine-N-oxide (NMMO). The structure features of Zr-TiO2catalysts were studied in detail through a variety of characterization methods, such as XRD, SEM, N2adsorption-desorption isotherms, XPS, EPR, and O2-TPD. As-obtained 5%Zr-TiO2catalysts had superior catalytic performance and stability with a 97.6% NMMO yield at 40 °C, which related to Zr doping, a higher surface area, more oxygen vacancies, and oxygen chemisorption on the catalytic surface. This work provides an efficient preparation strategy of TiO2-based catalysts for selective oxidation reactions by a facile method.
研究领域:
化学工程
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Guangyuan Hu,Zhiwei Wang,Changqing Xia,Xinliang Wang,Hongxing He,Zhifeng Nie,Shixing Wang,Weili Li
The recovery of gold from industrial effluents is crucial for environmental conservation, sustainable resource management, and promoting the green development of gold resources. We designed a Zr-based MOF (UKM-78) by incorporating functional organic ligands that resemble amino groups, using MOFs’ inherent sieving effect for ion separation. This novel material exhibited enhanced gold recovery under acidic conditions, with an adsorption capacity three times and an adsorption rate four times higher than those of nonfunctionalized UKM-77. Notably, UKM-78 efficiently captured gold solutions at concentrations as low as 1 ppm and achieved an adsorption rate exceeding 90%, owing to the electrostatic interactions and coordination between its functionalized groups and the synergistic effect of its porous structure. Despite multiple regeneration cycles, UKM-78 retains 99.4% of its adsorption capacity. X-ray photoelectron spectroscopy (XPS), kinetic studies, and thermodynamics collectively demonstrated that Au(III) binding on UKM-78 involved cooperative electrostatic interactions and chemical adsorption through coordination. This study highlights the potential of MOFs for efficient and sustainable recovery of gold from complex waste streams.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）