Iron-containing MIL-101(Cr) as highly active and stable heterogeneous catalysts for the benzylation of aromatics with benzyl chloride

Leng, Kunyue; Zhang, Chun-Mei; Li, Xin; Hou, Changmin; Sun, Yinyong

doi:10.1007/s11144-016-1084-8

Cited by 6 publications

(5 citation statements)

References 55 publications

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“…The binding energies of the 2p core levels of Al, P, Si, Ti and Fe obtained by XPS are similar for all the catalysts and are typical of Al 3+ , P 5+ , Si 4+ , Ti 4+ and Fe 3+ bonded to O atoms in tetrahedral environments (Table S1) [36][37][38][39][40][41][42]. The observed broadened peaks for these spectra can be related to the distribution of different types of cations in the second coordination shells (Fig.…”

Section: Structural and Textural Propertiesmentioning

confidence: 65%

Improvement of microporous silicoaluminophosphate properties by Fe and Ti insertion for photocatalytic hydrogen generation under visible light

Larbaoui

Hentit

Bentouami

et al. 2022

Microporous and Mesoporous Materials

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Section: Structural and Textural Propertiesmentioning

confidence: 65%

Improvement of microporous silicoaluminophosphate properties by Fe and Ti insertion for photocatalytic hydrogen generation under visible light

Larbaoui

Hentit

Bentouami

et al. 2022

Microporous and Mesoporous Materials

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“…[16] Nonetheless, improved activation procedures can raise the S BET of the (additive-free)-MIL-101(Cr). For example, Makmeesub et al synthesized (additive-free)-MIL-101(Cr) hydrothermally at 218 °C for 18 h as per other reported works [150][151][152] (S BET = 3510 -3960 m 2 g −1 ) but achieved markedly higher S BET = 4440 m 2 g −1 by thoroughly washing their sample with DMF, water, acetone, and methanol. [153] As shown in Figure 9b, there are 16 entries with V pore 2 cm 3 g −1 and above.…”

Section: Additive-free Synthesismentioning

confidence: 99%

“…[153] As shown in Figure 9b, there are 16 entries with V pore 2 cm 3 g −1 and above. [15,18,29,150,151,[154][155][156][157][158][159][160][161][162][163][164] Four of these samples were washed with NH 4 F despite the additive-free synthesis approach. [15,18,157,159] Besides removing BDC 2− as soluble ammonium terephthalate salts, NH 4 F washings also introduce F − ions into the as-prepared MIL-101(Cr) toward more crystalline samples.…”

Section: Additive-free Synthesismentioning

confidence: 99%

“…For example, Makmeesub et al. synthesized (additive‐free)‐MIL‐101(Cr) hydrothermally at 218 °C for 18 h as per other reported works [ 150–152 ] ( S BET = 3510 – 3960 m 2 g −1 ) but achieved markedly higher S BET = 4440 m 2 g −1 by thoroughly washing their sample with DMF, water, acetone, and methanol. [ 153 ]…”

Section: Influence Of Additives On Mil‐101(cr)’s Porosity and Particl...mentioning

confidence: 99%

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Elucidating Improvements to MIL‐101(Cr)’s Porosity and Particle Size Distributions based on Innovations and Fine‐Tuning in Synthesis Procedures

Wee

Chinnappan

Ramakrishna

2023

Adv Materials Inter

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Among the existing metal–organic frameworks (MOFs), MIL‐101(Cr) is renowned for its stability in air and water. As a result, MIL‐101(Cr) has numerous potential applications ranging from adsorptive cooling to catalysis. The industrial‐scale production of MIL‐101(Cr) is necessary before realizing these applications. Yet, there remain two main bottlenecks in preparing MIL‐101(Cr) in bulk: the toxicity of hydrofluoric acid (HF) used in conventional MIL‐101(Cr) synthesis and the challenge of ensuring that the as‐prepared MIL‐101(Cr) is highly porous with specific Brunauer–Emmett–Teller surface area (SBET) above 4000 m2 g−1. On the laboratory scale, MIL‐101(Cr) often presents SBET 2300–3500 m2 g−1. The synthesis and purification procedures often influence the yield, particle size, porosity, and other properties of MIL‐101(Cr). This critical review examines trends in MIL‐101(Cr) preparation procedures and the MOF's resulting properties to elucidate areas for improvement toward its real‐world applications. The purification processes for conventional HF‐based MIL‐101(Cr) whereby porosities vary despite the same synthesis approach are first investigated. Next, the reported additives for substituting HF and their influence on the resulting MIL‐101(Cr)’s porosity and particle size are discussed. The selection of additives may be application‐specific: exemplified in the examination of MIL‐101(Cr)’s preparation, its corresponding water sorption capacity, and desiccant‐related applications.

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“…Figure 3D displays the high-resolution XPS spectra of Cl 2p for CuCl 2 /MIL-101(Cr) (curve b), CoCl 2 /MIL-101(Cr) (curve c), and FeCl 3 /MIL-101(Cr) (curve d). These spectra exhibit a prominent characteristic peak at 199.8 eV, corresponding to the Co−Cl and Fe−Cl bonds, respectively.Besides, the weak peak at 201.4 eV is the characteristic peak of the Cr−Cl bond 44. Moreover, the high-resolution XPS spectra of Cr 2p (Figure3E), C 1s (Figure3F), and O 1s (Figure3G) reveal that the characteristic peaks of metal-ion-loaded MIL-101(Cr) exhibit certain shifts compared to those of MIL-101(Cr), implying alterations in the chemical environment of Cr, C, and O, possibly due to the formation of Cr−Cl bonds.…”

mentioning

confidence: 99%

Nanometer-Sized MIL-101(Cr) Loaded with Metal Ions for Applications as a Nitrite Sensor with Enhanced Electrochemical Properties

Dong,

Liu,

Liu

et al. 2024

ACS Appl. Nano Mater.

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In this work, iron ions, copper ions, and cobalt ions were introduced into the nanometer-sized Material of Institute Lavoisier (MIL)-101(Cr) using a simple impregnation technique to improve the electrochemical sensing performance for nitrite. The characterization results of scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) confirmed the successful preparation of octahedral MIL-101(Cr) and metal-ion-loaded MIL-101(Cr) with the size of about 300 nm. Electrochemical characterization unequivocally demonstrated that the electrochemical properties of the loaded nanometer-sized MIL-101(Cr) surpassed those of the original MIL-101(Cr). Notably, introducing iron ions into MIL-101(Cr) significantly enhanced the electrochemical properties. Consequently, a nitrite electrochemical sensor was constructed utilizing the superior electrochemical properties of the nanometer-sized MIL-101(Cr) loaded with iron ions. The proposed nitrite sensor exhibits a linear detection range from 2.5 μM to 11.4 mM, with a sensitivity of 179.9 μA mM −1 cm −2 and a detection limit of 0.21 μM. Additionally, the proposed nitrite sensor demonstrates exceptional anti-interference capability, repeatability, reproducibility, and stability and can also be applied to determine the nitrite content in sausage samples, further proving its efficacy and reliability for practical applications.

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Iron-containing MIL-101(Cr) as highly active and stable heterogeneous catalysts for the benzylation of aromatics with benzyl chloride

Cited by 6 publications

References 55 publications

Improvement of microporous silicoaluminophosphate properties by Fe and Ti insertion for photocatalytic hydrogen generation under visible light

Improvement of microporous silicoaluminophosphate properties by Fe and Ti insertion for photocatalytic hydrogen generation under visible light

Elucidating Improvements to MIL‐101(Cr)’s Porosity and Particle Size Distributions based on Innovations and Fine‐Tuning in Synthesis Procedures

Nanometer-Sized MIL-101(Cr) Loaded with Metal Ions for Applications as a Nitrite Sensor with Enhanced Electrochemical Properties

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