JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Weina Lv,Tao Shen,Fan Ding,Shanshan Mao,Zhuang Ma,Jiaxuan Xie,Manglai Gao
A multifunctional polyethyleneimine-graphene oxide/organo-vermiculite composite (PGO/OVt) was successfully fabricated by introducing OVt (modified by dodecyl dimethyl benzyl ammonium chloride, 1227) and polyethyleneimine (PEI) onto GO. For PGO/OVt, the proportion of GO was 25%, while OVt accounted for 75%, which can not only effectively reduce the cost of GO-doped adsorbents, but also ensure a high adsorption efficiency. Various analyses, including FT-IR, XPS, AFM, SEM, TEM, TG-DTG, and XRD were used to characterize the structures and surfaces of PGO/OVt. The surface properties of graphene oxide (GO), the hydrophobicity of OVt, and abundant amino functional groups in polyethyleneimine made PGO/OVt an excellent, versatile adsorbent of Congo Red (CR) and Acid Red 1 (AR-1) in single and binary-dyes system. In single-dye systems, due to the existence of hydrogen bonding, π-π, hydrophobic, and electrostatic interactions between adsorbent and dyes, PGO/OVt exhibited excellent adsorption capacities of 570 mg/g and 365 mg/g for CR and AR-1, respectively. The adsorption processes were well described by pseudo-second-order kinetics ( R 2 > 0.99) and the Langmuir isotherm model ( R 2 > 0.98). The thermodynamic parameters demonstrated that the adsorption processes were nonspontaneous and endothermic. In the binary-dyes system, the maximum adsorption amount of CR was 491 mg/g, and that of AR-1 was 384 mg/g. The influence intensity factor ( φ ) revealed that the effect between the two components changed from competition to synergy with the variation of initial concentration. The synergistic effect indicated the possible presence of a π-π stacking effect between the molecules of adsorbed and dissociative dyes. Based on the obtained results, the resulting PGO/OVt was an efficient, and a lower cost adsorbent containing GO (GO-doped adsorbent). This work provided a reference for the development of GO composite adsorbents.
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高影响因子
ELECTROPHORESIS
·
2018
·Vol. 39
·期 20
·2619-2625
·
IF 2.569
Pingxiu Tang,Rong Wang,Zilin Chen
The high stability and other properties of Zr(IV)-based metal organic frameworks(MOFs) make it a promising choice for chromatographic separation, while the application in open-tubular capillary electrochromatography (OT-CEC) separation has not been explored yet. Herein, we report the first example of the in-situ growth of UiO-66-NH 2 onto the capillary for open-tubular capillary electrochromatography. UiO-66-NH 2 consists of ZrCl 4 and 2-amino-1,4-benzenedicarboxylic acid, which is highly porous and stable in a variety of solvents. The prepared UiO-66-NH 2 modified capillary was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FT-IR), and the results confirmed the successful growth of the UiO-66-NH 2 . The baseline separation of chlorobenzenes, phenoxyacids and two groups of phenols was achieved owing to the combined interaction of π-π interaction, hydrophobic interaction, molecular sieve effect, electrophoretic migration and hydrogen-bonding interaction etc. Besides, the prepared capillaries showed good reproducibility, with relative standard deviations (RSDs) for intra-day, inter-day and column-to-column runs in the range of 1.38–2.60%, 3.39–4.05%, and 3.47–5.03%, respectively. Our work indicates Zr(IV)-based MOFs are promising materials as stationary phase in CEC separation.
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高影响因子
TALANTA
·
2021
·
IF 6.057
Huazheng Yu,Yanhong Li,Aisheng Huang
Sialic acid (SA) is a crucial component of glycoproteins and glycolipids on the cellular membrane, which is essential for maintaining the function of cell membranes, such as cell recognition and communication. Simultaneously, sialic acid plays a significant role in many physiological and pathological processes. Hence, it is urgent to develop a simple and sensitive strategy for determining sialic acid. In this work, a new metal-organic framework called UiO-66-NH 2 @B(OH) 2 has been designed and synthesized for the recognition and detection of sialic acid. The boronic acid functional group in UiO-66-NH 2 @B(OH) 2 can bind to a diol moiety of the glycerol side chain of sialic acid, which will attenuate or even quench the fluorescence of UiO-66-NH 2 @B(OH) 2 , thus opening a new road to detect sialic acid. Based on the measurement results, sialic acid can be quantitatively measured in a linear range of 0.05–2.5 mmoL/L with the UiO-66-NH 2 @B(OH) 2 probe. The detection limit of sialic acid is as low as 0.025 mmol/L. Furthermore, the boronic-acid functionalized probe UiO-66-NH 2 @B(OH) 2 displays high sensitivity and high selectivity to recognize the sialic acid in mouse serum samples. Therefore, the developed UiO-66-NH 2 @B(OH) 2 can be used as a promising probe to identify and detect sialic acid in the practical application.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yixing Luo,Qifeng Yang,Wendan Nie,Qilu Yao,Zhujun Zhang,Zhang-Hui Lu
Hydrogen (H2), a regenerable and promising energy carrier, acts as an essential role in the construction of a sustainable energy system. Formic acid (HCOOH, FA), a natural biological metabolic products and also accessible through carbon dioxide (CO2) reduction, has a great potential to serve as a prospective H2 supplier for the fuel cell. Herein, ultrafine and electron-rich IrPdAu alloy nanoparticles with a size of 1.4 nm are highly dispersed on amine-modified mesoporous SiO2 (NH2-SBA-15) and used as a highly active and selective catalyst for fast H2 production from FA. The as-synthesized IrPdAu/NH2-SBA-15 possesses superior catalytic activity and 100% H2 selectivity with initial turnover frequency values of 6316 h–1 with the additive of sodium formate (SF) and 4737 h–1 even without SF at 298 K, comparable to the most effective heterogeneous catalysts ever published. The excellent performance of IrPdAu/NH2-SBA-15 was not only ascribed to the combination of the electronic synergistic effect of trimetallic alloys and the strong metal–support interaction effect but also attributed to the amine (−NH2) alkaline groups grafted on SBA-15, which is beneficial to boost the split of the O–H bond of FA.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 3
·1-10
·
IF 5.3
Miao Pandeng,Chen Jiaquan,Xu Guangfu,Yu Tao,Du Yingxiang
Chiral phenyl aromatic compounds (CPACs) are widely used in drug development, food/cosmetic production, and other organic synthesis processes, and their different enantiomers have distinct physiological activities and application differences. A double-layer metal–organic framework composite (MOF-on-MOF) was obtained by in situ synthesis of chiral metal–organic framework (CMOM-3S) on the surface of an iron-based metal–organic framework (NH 2 -MIL-101(Fe)). According to our investigation, MOF-on-MOF composite was for the first time applied to the stationary phase of capillary electrochromatography (CEC), and enantioseparations of eight CPACs were accomplished. Compared with single CMOM-3S, the enantioseparation performance of the coated capillary columns based on NH 2 -MIL-101(Fe)@CMOM-3S was improved by 34.07 ~ 720.0%. The R-/S-mandelic acid in actual sample (apricot leaves) was detected by the newly CEC system to be 0.0118 mg mL −1 and 0.0523 mg mL −1 , respectively. The spike recoveries were 96.60 ~ 104.7%, indicating its good stability and accuracy. In addition, the selective adsorption capacity of MOF-on-MOF composites was verified by adsorption experiments. Graphical Abstract
研究领域:
分析化学
·
材料科学
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 9
Xiaochan An,Yutong Gu,Wenping Wang,Jianxiao Wang,Yongxin Cui,Hongbing Luo,Ke Zhang,Liangqian Fan,Wei Chen
Membrane-fouling in forward osmosis (FO) process has limited its application in drug-containing wastewater treatment. Advanced membrane coupled photocatalytic oxidation process has drawn growing interest. In this study, functional photocatalytic thin-film composite (TFC) membranes modified using metal-organic framework of NH 2 -MIL-125(Ti) (NM125) were prepared through simple blending during interfacial polymerization process. Due to the intrinsic hydrophilicity and photocatalytic properties of the nano-sized NM125, the modified TFC membrane (NM-6) demonstrates improved permeability-selectivity with a A/B value of 16.19 bar -1 , outstanding light-response functionality (the photocatalytic efficiency is 80.95 % for tetracycline hydrochloride (THC) and 66.76 % for ibuprofen (IBU)), and ∼100 % rejection of THC and IBU in nearly all the FO tests. Furthermore, NM-6 displays excellent operation stability with a 5 % water decline and 98 % water recovery for treating THC-containing feed solution under light irradiation (0.64 kW/m 2 ), while the control membrane of NM-0 showed 22 % of water decline and 85 % water recovery. Our membrane with the property of photocatalytic self-cleaning opens opportunities for developing next-generation anti-fouling forward osmosis membranes.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Erzhu Sun,Hong Li,Lanjie Xu,Shihao Zhang
In this study, NH2-MIL-101(Fe)/WO3 heterojunctions were prepared by solvothermal method and then incorporated into polyvinylidene fluoride (PVDF) membranes via phase inversion method to fabricate recyclable photocatalytic membranes with high degradation performance. The SEM and XRD characterization results indicated that NH2-MIL-101(Fe) and WO3 were physically combined. Using MB as the target pollutant, the membrane with 30 mg of Tungsten trioxide（WO 3 ） doping exhibited optimal degradation performance, achieving complete MB degradation within 100 min and a TOC removal rate of 85 %. During the degradation process, superoxide radicals (·O 2 − ), hydroxyl radicals (·OH) and photogenerated holes (h⁺), played a major role. The results of UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence (PL) spectra showed that the incorporation of WO 3 effectively suppressed the recombination of electron-hole pairs and enhanced visible light absorption, thereby improving the photocatalytic activity. Transient photocurrent response (i-t) and electrochemical impedance spectroscopy (EIS) tests further demonstrated that the composite photocatalyst with 30 mg of WO 3 exhibited the highest photocurrent density and the lowest charge transfer resistance. Degradation cycling experiments revealed that after four cycles of degradation, the PVDF photocatalytic membrane maintained high photocatalytic activity for MB. This study suggests that the combination of NH 2 -MIL-101(Fe)/WO 3 and PVDF membranes provides a promising new approach for exploring wastewater treatment solutions.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2017
·
IF 3.615
Yu-Han Fan,Shou-Wen Zhang,Shi-Bin Qin,Xiao-Shui Li,Shi-Hua Qi
In this paper, the enhanced adsorption properties and mechanism of NH 2 functionalization titanium-based metal-organic frameworks (NH 2 -MIL-125(Ti)) towards various organic dyes was investigated. First, MIL-125(Ti) and NH 2 -MIL-125(Ti) were successfully synthesized and characterized. The as-prepared Ti-MOFs can be facilely magnetized by adsorbing Fe 3 O 4 nanoparticles on their surfaces via a Lewis acid-base interaction. Then, three types of dye (cationic dye, anionic dye and vat dye) adsorption measurements show that the electrostatic interaction , π-π stacking interaction and pore filling all play important roles in the adsorption process of both Ti-MOFs in aqueous solutions. Particularly, the amino group in NH 2 -MIL-125(Ti) can provide extra hydrogen bonding interaction towards target substances, which results in a stronger interaction force and a higher adsorption capacity than that of MIL-125(Ti). The adsorption kinetics and isotherm suggested the adsorption process of both Ti-MOFs towards methylene blue (MB) were better fitted to a pseudo-second-order kinetic and Freundlich isotherm model. The adsorption thermodynamic experiments demonstrated that adsorption of MB on both Ti-MOFs was spontaneous. However, their values of enthalpy and entropy were opposite, indicating that their adsorption processes were controlled by enthalpy and entropy effect, respectively.
研究领域:
材料科学
·
环境化学
·
纳米材料
·
吸附科学
·
功能材料
·
污染治理
·
界面化学
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DOI
高影响因子
ENERGY & FUELS
·
2016
·
IF 2.835
Zuowang Wu,Chong Chen,Hui Wan,Lei Wang,Zhong Li,Bingxue Li,Qirui Guo,Guofeng Guan
A magnetically recyclable and efficient catalyst for biodiesel synthesis was fabricated by confining the Brønsted ionic liquid 1,4-butanediyl-3,3′-bis(3-sulfopropyl) imidazolium dihydrogensulfate in an amino-functionalized magnetic metal–organic-framework composite (Fe3O4@NH2-MIL-88B(Fe)) through a simple and efficient strategy via the amino groups. The catalyst was systematically characterized, proving ionic liquid was grafted in the amino-functionalized carrier, and the catalyst was spindle-shaped with superparamagnetism (7.2 emu/g). The prepared catalyst with high acidity (1.76 mmol H+ g–1) exhibited good catalytic activity in biodiesel synthesis from oleic acid and ethanol with a yield of 93.2%, optimized by Box-Behnken response surface methodology. The fine catalytic performance of the catalyst was mainly due to the combination of the characteristics of the ionic liquid and the structure of Fe3O4@NH2-MIL-88B(Fe). Moreover, the catalyst was recycled without significant loss of activity after being used for six runs and could be magnetically separated in magnetic force without obvious mass loss.
研究领域:
催化化学
·
能源材料
·
绿色化学
·
纳米复合材料
·
可再生能源
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Youzhou He,Yuwei Tan,Mengyu Song,Qingli Tu,Min Fu,Liangjun Long,Jie Wu,Mengmeng Xu,Xingyan Liu
Photocatalysis technology has been widely adopted to abate typical air pollutants. Nevertheless, developing photocatalysts aimed at improving photocatalytic efficiency is a challenge. Herein, the linker-defect NH 2 -MIL-125(Ti) photocatalyst was synthesized through a convenient one-step heating-stirring method (just adjusting multiple temperatures) to firstly realize efficient photocatalytic performances of NO removal and hydrogen evolution . The optimal sample (named 65-NMIL) with a linker-defect content of 32.08% exhibited a NO removal ratio of 65.49%, which was 37.57% higher than that of pristine NH 2 -MIL-125(Ti), and displayed better H 2 -production activity. Through ESR, it was confirmed that 65-NMIL can generate more •O 2 - and •OH under visible light, and the radical trapping experiment further proved that •O 2 - played a more important role in photocatalytic activity. Moreover, the photocatalytic NO oxidation process was also monitored by in situ DRIFTS , it was found that the defective samples could promote the oxidation of NO and intermediates to the final product (NO 3 - ). On the basis of the above-mentioned photocatalytic experimental results and characterization, a possible mechanism or pathway was proposed and illustrated. This work can provide a new strategy for the subsequent defect engineering for photocatalytic MOFs materials to further solve environmental and energy crises.
研究领域:
材料科学
·
光催化
·
环境修复
·
能量转换
·
纳米技术
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DOI
高影响因子
NANO
·
2015
·
IF 1.09
Desheng Xi,Xiaojuan Deng,Huijun Li,Pei Yao
Allura red (AR) is a water-soluble synthetic colorant often used as an additive in the food industry, but excess AR can be harmful to human health. In this work, we report the development of a new removal method for AR by using amino-functionalized microspheres with Fe 3 O 4 cores and twolayer shells composed of SiO 2 particles and perpendicularly aligned mesoporous SiO 2 (designated Fe 3 O 4 @nSiO 2 @mSiO 2 –NH 2 ). The material exhibits good dispersibility in aqueous solutions and a high saturation magnetization of 45.68 emu g − 1 , and can be magnetically separated efficiently with an external magnet. Importantly, the material has great adsorption capacity of 29.6 mg g − 1 for AR and the capacity for reuse with a simple treatment. The adsorption process is very fast and the kinetics data are consistent with a pseudo-second order model. Based on these, a rapid and efficient method for extraction and analysis of AR in water and soft drinks has been established.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Weixiao Shan,Yudan Yi,Xinqiu Hong
Multifunctional flexible pressure sensors have garnered significant interest for their potential in health monitoring, electronic skin, and human-machine interfaces. However, sensors fabricated by simple physical blending often suffer from weak interfacial bonding, which leads to the detachment of conductive materials under repeated deformation. To address this issue, we propose an innovative strategy by incorporating aminofunctionalized carbon nanotubes (NH 2 -CNTs) into an MXene/polyurethane (PU) sponge system. Driven by strong electrostatic interactions between NH 2 -CNTs and MXene, a robust and interconnected conductive network is constructed through an electrostatic layer-by-layer self-assembly process. The resulting MXene/NH 2 -CNTs/PU sponge exhibits remarkable overall performance, featuring high sensitivity (0.387 kPa −1 ), rapid response/recovery times (82/83 ms), a wide detection range (0–55 kPa), an ultralow detection limit (11 Pa), and excellent cyclic stability (>5000 cycles). Benefiting from its wide detection range and high sensitivity, the sensor enables real-time monitoring of diverse physiological signals, from subtle acoustic vibrations of the vocal cords to full-range body movements. Coupled with its facile and low-cost fabrication process, the multifunctional MXene/NH 2 -CNTs/PU sponge sensor paves the way for broad applications in human activity monitoring and beyond.
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DOI
高影响因子
危险品化学品经营许可证（带存储）