CHEMISTRY AND ECOLOGY
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2024
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IF 1.3
Zhenpeng Li,Dongmei Yan,Jun Li,Ziwei Mai,Fuchuan Huang
Hexavalent chromium (Cr(VI)) is regarded as a water pollutant because of its high toxicity in aquatic environments. In this study, polyethyleneimine-functionalised NH2-MIL-101(Cr) (PEI@NH2-MIL-101(Cr)) was fabricated by a facile wet impregnation method, and its effectiveness at removing Cr(VI) from wastewater was systematically investigated. As suggested by the experimental findings, pH was a significant determinant of Cr(VI) uptake by the fabricated PEI@NH2-MIL-101(Cr). Preferable depiction of adsorption system was achievable with the Langmuir adsorption model and the pseudo-order 2 kinetic model. At 288, 298, and 308 K, the highest adsorbability values were 241.55, 310.56, and 408.16 mg g−1, respectively. Processes like electrostatic attraction, reduction and chelation helped promote the Cr(VI) elimination. SO42− ions had a relatively large impact on the Cr(VI) adsorption compared with other coexisting ions such as NO3−, Cl− and H2PO4−1. Because of its properties of high adsorption capacity and Cr(VI) detoxification, the potential of PEI@NH2-MIL-101(Cr) in the Cr(VI) elimination from wastewater appears to be promising.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Yunqi Zhou,Ye Yuan,Xinlei Liu,Zhi Wang
Metal-organic framework (MOF) membranes with proper pore size distribution and functional groups are generally more suitable for separation. Most MOFs are characterized by a hierarchical pore structure, which possesses large cavities surrounded by small windows. Fabrication of MOF membranes only retaining microporous fragment structure is a workable method to narrow pore size distribution. In this study, well-grown NH 2 -MIL-101(Cr) fragment membranes were fabricated for CO 2 separation by adjusting acetic acid – ligand – metal ratio to balance the nucleation and growth. NH 2 -MIL-101(Cr) fragment has a similar chemical structure to NH 2 -MIL-101(Cr) as expected, but only small pores with size around 0.56 nm is retained. The NH 2 -MIL-101(Cr) fragment membranes exhibited CO 2 /N 2 selectivity of about 37 with CO 2 permeance up to 6104 GPU.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 151
·期 9
·2560-2569
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IF 3.186
Han Jishu,Wang Ying,Liu Ying,Bai Jiayu,Zhao Ruiyang,Wang Lei
In this paper, novel CdSe/NH 2 -MIL-101(Cr) nanocomposites for photocatalytic hydrogen production were synthesized. When the prepared NH 2 -MIL-101(Cr) MOFs were modified with CdSe QDs, the photocatalytic hydrogen production amount was significantly increased and reached to 17,664 μmol g −1 in 7 h. The formation of CdSe/NH 2 -MIL-101(Cr) nanocomposites enhanced the light absorption intensity, broadened the visible light absorption range, promoted the transfer of photogenerated electrons and inhibited the recombination of photogenerated electron–hole pairs, then effectively improved the photocatalytic hydrogen production performance. In addition, the CdSe/NH 2 -MIL-101(Cr) nanocomposites exhibited high cycle stability, which was beneficial to the practical application in photocatalytic hydrogen production. Graphic Abstract
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
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IF 5.977
Qinzhi Wang,Zhan Shi,Zhi Wang,Yijian Zhao,Jianuo Li,Huifan Hu,Yaowen Bai,Zhihao Xu,Hui Zhangsun,Li Wang
Acid orange II (AO II), a typical azo pigment, is strictly controlled by legislation and prohibited in foodstuffs. Herein, we prepared gold nanoparticles decorated amino-functionalized Cr-based metal-organic frameworks [NH 2 -MIL-101(Cr)@Au] via an in-situ reduction method as a surface-enhanced Raman scattering (SERS) substrate for simultaneous adsorption and detection of AO II. Gold nanoparticles are uniformly dispersed on the surface of NH 2 -MIL-101(Cr) owing to its three-dimensional (3D) structure and the interaction between –NH 2 and Au ions , providing more SERS-active “hot spots”. These NH 2 -MIL-101(Cr)@Au nanocomposites exhibited selective and high adsorption performance (419.85 mg g −1 ) for AO II, and could be used as superior SERS substrates for the detection of AO II with a low limit of detection (LOD) of 0.05 mg L −1 and wide detection range of 0.05–50 mg L −1 using portable Raman spectrometer. Furthermore, this SERS assay has been successfully used to determine AO II in orange juice and chili powder with good sensitivities.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
Materials Today Communications
·
2025
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IF 4.5
Lifeng Chi,Xiutong Wang,Siyao Guo,Meipeng Ren,Hua Guo,Mingchun Wang,Youbo Nan,Jinguo Wang
Photocathodic protection has obtained enormous attention in the field of metal corrosion control as an efficient and eco-friendly technology. Developing the photoelectrode with good photoelectrochemical properties is a prerequisite for achieving satisfactory photocathodic protection performance. Here, the NH 2 -MIL-101(Cr)/TiO 2 heterostructures are prepared. Meanwhile, the organic linkers and metal ions from NH 2 -MIL-101(Cr) are used to synthesize the N- and Cr-doped TiO 2 anodes, respectively. The UV–vis DRS, photoluminescence spectra and photoelectrochemical tests conducted under visible light demonstrate the enhanced light absorption, suppressed photoinduced charge carrier recombination, and accelerated separation and transfer rates of photoinduced electron-hole pairs in the TiO 2 composites. The 304 stainless steel connected with NH 2 -MIL-101(Cr)/TiO 2 heterostructures shows the most negative potential (about −0.72 V vs. SCE) and satisfied stability in a 3.5 wt% NaCl solution. The result can be explained by the significantly enhanced optical and photoelectrochemical properties and the strong electric field intensity in the composite heterojunctions. Besides, it has been observed that the NH 2 -MIL-101(Cr)/TiO 2 heterostructures exhibit the best photocathodic protection performance than Cr and N-doped TiO 2 anodes. This research broadens the application scope of MOFs in corrosion resistance and helps to assess the effect of heterostructure construction and element doping on TiO 2 .
研究领域:
材料科学
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电化学
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腐蚀与防护
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2020
·Vol. 20
·期 3
·1807-1813
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IF 1.134
Wang Yulin,Qiu Xiuzhen,Li Yangyang,Guo Huishi,Lu Wenguan,Nie Libo
A novel molecularly imprinted polymer material based on the metal-organic framework NH2-MIL-101(Cr) (MOF-MIP) was prepared. The synthesized MOF-MIP was characterized by IR, XRD, SEM and N2 absorption. The characterization results displayed that the MOF-MIP which exhibited
an octahedral shape had good dispersibility, good thermal stability and a high surface area. Subsequently, the adsorption behavior of MOF-MIP to diclofenac sodium (DS) in aqueous solution was examined. A series of adsorption experiments demonstrated that the MOF-MIP had high transfer mass
rates and high sensitivity and selectivity for DS. Then the MOF-MIP was used as the adsorbent of dispersive micro-solid phase extraction (DMSPE) for the detection of DS in urine. Under optimum conditions, the average recovery of DS ranged from 88.3 to 101.6% with RSD of 5.6%. The described
method provides a rapid route for determination of DS in human urine.
研究领域:
分析化学
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材料科学
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环境科学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2025
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IF 5.5
Ai-Hui Cao,Xin-Tai Su,Min Zhang,Qi-Long Zhu
Photocatalytic water decomposition is a cost-effective way to convert sustainable solar energy into chemical energy. While semiconductor photocatalysis has generated considerable interest in photocatalytic hydrogen evolution, it is hampered by fast electron–hole complexation and suboptimal efficiency. Herein, an NH2-MIL-101(Cr)/doped-C3N4 heterojunction possessing a static internal electric field (IEF) is successfully prepared, characterized, and assessed for photocatalytic hydrogen production. The optimized photocatalytic H2 evolution rate of the resultant NH2-MIL-101(Cr)/O–C3N4 is 460 μmol g–1 h–1 under visible light, with an AQY of 2.5% at 450 nm. Spectral evidence indicates that the static IEF facilitates rapid electron transfer from NH2-MIL-101(Cr) to O–C3N4, achieving efficient photogenerated charge separation and a consequent significant enhancement in catalytic activity. This work not only presents a case of construction of an IEF through assembling NH2-MIL-101(Cr) with O–C3N4 but also deepens the insight of the rudimentary mechanisms of the static IEF in heterojunctions for photocatalytic hydrogen evolution.
研究领域:
材料科学
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化学
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能源技术
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2025
·
IF 3.3
Yanjia Zhou,Xiao-Dong Tang,Jingjing Li,Da-Yong Qing,Hong Wang
MIL-101(Cr) and MIL-100(Fe) are both representative MIL-type Metal-Organic-Frameworks (MOFs) materials, renowned for their large specific surface areas and size-tunable characteristics, making them suitable candidates for Li+ extraction from lithium-containing solvent. By introducing -NH2 functional groups and using LiNO3 as both a template and mineralizer, the functionalized MOF materials Li/NH2/MIL-101(Cr) and Li/NH2/MIL-100(Fe) were synthesized. Following modification, their Li+ adsorption capacities were increased, reaching 43.58 and 38.22 mg/g, respectively. The dosage of mineralizer, initial Li+ concentration, adsorbent dosage, solution pH value, and temperature all have an impact on the adsorption capacity of adsorbents. In addition, through the establishment of the pseudo-first-order kinetic model, pseudo-second-order kinetic model, as well as Langmuir and Freundlich thermodynamic models, it can be known that the adsorption of the materials belonged to monolayer chemisorption, and the adsorption process was exothermic. Furthermore, both adsorbents showed good reusability, retaining over 85% of their initial adsorption capacity after four adsorption-desorption cycles, highlighting their practical applicability in lithium recovery processes. In Mg-Li mixed solution systems, both materials exhibited exceptional Li+ selectivity. At a low Mg2+/Li+ ratio of 3, the separation factor (α) exceeded 80; even at a high Mg2+/Li+ ratio of 10, α remained near 50. Additionally, in systems with coexistence of multiple interfering ions, the distribution coefficient (Kd) followed the order: Li+ ≫ Mg2+ > Ca2+ > Na+ > K+. In the mixed systems, Li/NH2/MIL-101(Cr) and Li/NH2/MIL-100(Fe) exhibited certain separation effect for Li+ against competing cations.
研究领域:
材料科学
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环境科学
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化学工程
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无机化学
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分离技术
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DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Yawen Cai,Jinghua Feng,Xiaoli Tan,Xin Wang,Zhimin Lv,Weiwei Chen,Ming Fang,Haining Liu,Xiangke Wang
The efficient decontamination of pertechnetate ( 99 TcO 4 − ) is an essential task for managing radioactive 99 Tc in nuclear wastes . Perrhenate, (ReO 4 − ), as a nonradioactive analog, exhibits almost identical physicochemical properties as 99 TcO 4 − . Herein, a novel magnetic amine-functionalized MIL-101(Cr) (NH 2 -MIL-101(Cr)@Fe 3 O 4 ) was prepared and used to efficiently remove ReO 4 − from solution for the facile magnetic separation. A series of environmental parameters were considered to investigate the adsorption performance of NH 2 -MIL-101(Cr)@Fe 3 O 4 . Experimental results suggested that NH 2 -MIL-101(Cr)@Fe 3 O 4 has reached a satisfied adsorption capacity (~401 mg/g) and a very fast adsorption kinetics at pH 7.0. The selectivity for ReO 4 − was maintained even in the presence of interfering anions with relatively high concentrations. ReO 4 − were mainly captured by N-donor sites of the surface-decorated amine via complexation and were trapped in the cavities of modified MIL-101(Cr). NH 2 -MIL-101(Cr)@Fe 3 O 4 exhibits satisfactory adsorption performance for ReO 4 − and can be conveniently separated from wastewaters after adsorption.
研究领域:
环境科学
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材料科学
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放射化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yanyan Xing,Mengke Tian,Ruoman Ji,Ting Wang,Xiaohong Hou
The immobilization of bovine serum albumin (BSA) with high efficiency, good reproducibility and stability for chiral separation has attracted much attention in the medicinal field. BSA was immobilized into MIL-101(Cr) by three ways for efficient chiral separation in this research. MIL-101(Cr)@BSA was firstly prepared by adsorption, NH 2 -MIL-101(Cr) ⊂ BSA by direct bonding, and NH 2 -MIL-101(Cr) ⊂ Glu ⊂ BSA by glutaraldehyde crosslinking bonding. Compared to the other two materials, NH 2 -MIL-101(Cr) ⊂ BSA as a new enantioselective separator, with the most BSA loading rate of 437.6 mg g −1 exhibited excellent chiral separation performances and succeeded in realizing a complete chiral separation of racemic 1–phenylethanol within 14 s. It was found that the NH 2 -MIL-101(Cr) ⊂ BSA was more strongly bound to R -1-phenylethanol and the ee value could reach 100 % when the material was added in three batches. The different interactions between BSA and racemates mainly including hydrogen bonding, hydrophobic interaction and π-π interaction were revealed by the molecular docking studies, especially hydrogen bonding, accounting for the observed selective chiral recognition capacity of racemic 1–phenylethanol of NH 2 -MIL-101(Cr) ⊂ BSA. Moreover, both of NH 2 -MIL-101(Cr) ⊂ BSA and NH 2 -MIL-101(Cr) ⊂ Glu ⊂ BSA showed excellent stability and reusability. This combination of theory and experiment provided a clearer basis for other researchers to have different requirements for protein immobilization, and provided new ideas and methods for the development of chiral selectors.
研究领域:
生物化学
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材料科学
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医药工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Enhui Wu,Yuexian Li,Qing Huang,Zhenkai Yang,Anyu Wei,Qi Hu
An amino-functionalized magnetic metal organic framework (MOF), Fe 3 O 4 -NH 2 @MIL-101(Cr), was employed for laccase immobilization for the first time. The immobilized laccase was synthesized by the adsorption and covalent binding method, thus exhibited high activity recovery, large immobilization capacity and good tolerance to low pH and high temperature conditions. The excellent stability enabled the immobilized laccase to retain 89% of its initial activity after storage for 28 days. When the ambient temperature reached 85 °C, the immobilized laccase showed 49.1% residual activity even after 6 h preservation. The stability of laccase in organic solvents such as methanol was also greatly improved. Application of the immobilized laccase for 2,4-dichlorophenol removal was also investigated. The adsorption by Fe 3 O 4 -NH 2 @MIL-101(Cr) contributed to a quick removal in the first hour, and the removal efficiency reached 87% eventually. When the reaction was completed, the immobilized laccase could be separated from the solution by a magnet. The results introduced a novel support for laccase immobilization, and the immobilized laccase had great potential in wastewater treatment .
研究领域:
环境科学
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生物技术
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废水处理
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Changhua Li,Wei Liu,Yuquan Jing,Hao Yang,Qiuping Tang,Yongxu Cui,Chao Zhang,Wei Ren,Jing Zhang,Yi He
Metal–organic framework materials with large specific surface areas are ideal choices for storing corrosion inhibitors in organic coatings. Existing reports focus on materials such as ZIF-8 and ZIF-67, which release corrosion inhibitors by disintegrating themselves upon external stimuli. This release mechanism may lead to the formation of holes within the coating, providing channels for penetration into corrosive media. In this study, NH2-MIL 101 (Cr), which is stable under acidic/alkaline conditions, was grown on Ti3C2Tx surface via a hydrothermal method. Its porous structure was utilized to load environmentally friendly MoO42– corrosion inhibitors, and a stimulus-responsive TEOS shell was wrapped as a valve to control the release of the corrosion inhibitors. The synthesis of the Ti3C2Tx-MIL 101-MoO42–-TEOS (TMIT) composite material was verified by FT-IR spectroscopy and XPS, respectively. The TMIT-epoxy (TMITP) composite coating was prepared through a solid–liquid mixing method. The surface-active groups of NH2-MIL 101 (Cr) (−NH2) enhanced the interfacial strength with the resin and the crosslinking density, significantly increasing the tensile strength and adhesion strength of the composite coating. Due to the improved interfacial strength, the low-frequency impedance value remained at 4.14 × 108 Ω cm2 after 6 cycles of accelerated cyclic electrochemical tests (−4.0 V, 30 min), which greatly shortening the evaluation period of the coating performance. Additionally, the stimulus-responsive release mechanism of the TMIT filler endowed the coating with self-healing effects, achieving corrosion inhibition in damaged areas. Notably, the acid/alkali stability of NH2-MIL 101 (Cr) ensured that few holes would form within the coating after the release of corrosion inhibitors, preventing the penetration of corrosive media. This study utilized the pores of NH2-MIL 101 (Cr) to load corrosion inhibitors and prepare self-healing composite coatings, achieving intelligent release and enhancing the corrosion resistance of coatings, thus broadening the application strategy of MOF materials in corrosion protection coatings.
研究领域:
材料科学
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腐蚀工程
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智能涂层
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纳米复合材料
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自修复材料
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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）