Enhancement of Degradation and Dechlorination of Trichloroethylene via Supporting Palladium/Iron Bimetallic Nanoparticles onto Mesoporous Silica

Wei, Jianjun; Qian, Yajing; Wang, Lutao; Ge, Yijie; Su, Ling-Yan; Zhai, Debin; Wang, Jiang; Wang, Jing; Yu, Jiang

doi:10.3390/catal6070105

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…The discovery of Mobil Crystalline Materials, such as MCM-41 in 1992 by Mobil Oil Corporation scientists [1], has initiated intensive attention in the development of mesoporous silica materials and their applications in research and industry [2][3][4][5][6][7][8][9][10][11][12][13][14]. Afterwards, a range of highly ordered mesoporous silica materials such as SBA-15 and KIT-6 have been created in 1998 and 2003, respectively [15,16].…”

Section: Introductionmentioning

confidence: 99%

Relationship Between the Pore Structure of Mesoporous Silica Supports and the Activity of Nickel Nanocatalysts in the CO2 Reforming of Methane

Amin¹

2020

Catalysts

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The question remains over the role of the pore structure of the support material on the catalytic behaviour of Ni catalysts during the CO2/dry reforming of methane (DRM). For this reason, a series of mesoporous materials with different pore structures, namely MCM-41, KIT-6, tri-modal porous silica (TMS), SBA-15 and mesostructured cellular foams (MCFs) were synthesised via hydrothermal synthesis methods and further impregnated with 15 wt.% NiO (11.8 wt.% Ni). It was observed that synthesised TMS is a promising catalyst support for DRM as Ni/TMS gave the highest activity and stability among these materials as well as the Ni catalysts supported on classic ordered mesoporous silicates support reported in the literature at the relatively low temperature (700 °C). On the other hand, Ni supported on CMC-41 exhibited the lowest activity among them. To understand the reason for this difference, the physicochemical properties of these materials were characterised in detail. The results show that the thickness of the silica wall and the pore size of the support material play a critical role in the catalytic activity of Ni catalysts in the CO2 reforming of methane.

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Section: Introductionmentioning

confidence: 99%

Relationship Between the Pore Structure of Mesoporous Silica Supports and the Activity of Nickel Nanocatalysts in the CO2 Reforming of Methane

Amin¹

2020

Catalysts

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“…The mesoporous silica nanoparticles loaded with nisin (MSN/NI) were prepared as previously described, [22][23][24] Mix 1, 2, 3 wt%(with 2 g PLA as matrix) mesoporous silica nanoparticles (MSN) with 2 wt % (0.05 wt % pure nisin) of nisin standard and 15 mL of dichloromethane in a 25 mL plastic centrifuge tube. The mixture was sonicated at 150 W and 20 kHz for 20 min to homogenize it.…”

Section: Preparation Of Mesoporous Silica Nanoparticles Loaded With N...mentioning

confidence: 99%

Study on the property of mesoporous silica nanoparticles loaded with nisin for poly (lactic acid)‐based packaging film

Jiang

Zhu

et al. 2023

Polymer Composites

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Nisin was loaded in mesoporous silica nanoparticles (MSN) (0, 1, 2 and 3 wt%) and incorporated into poly (lactic acid) (PLA) matrix by casting method. The mechanical property, water vapor permeability, thermal property, and antimicrobial property of PLA nanocomposite films were measured. And the internal structure of the composite film was observed through the Scanning electron microscope. Meanwhile, the kinetic of nisin releasing from food simulated solution was investigated and the migration model was established. The result showed that mesoporous silica had an effect on the mechanical and thermal property of the composite films. Both water vapor transmission rate (WVP) and oxygen permeation rate (OTR) decreased, especially for 3MSN/NI/PLA, where WVP decreased by about 9.64% and OTR decreased by 35.19%, which was beneficial to improve the preservation effect. With the addition of MSN, the amount of loaded nisin increased, and at 3MSN/NI, the nisin loading reached 88.75%, and the mesoporous silica could effectively control the release of nisin, thus prolonging the preservation effect. The release kinetic of nisin was described by Fick's law and Weibull's model. In short, the PLA nanocomposite film has the potential to be used as an antimicrobial active film by adding nisin as an antimicrobial agent.Highlights A biodegradable antimicrobial food grade film was prepared. Nisin was added to the films as an antimicrobial agent. The ordered mesoporous structure of MSN was used as a carrier of antimicrobial agent. The film effectively inhibits E. coli and S. aureus by controlling the release of nisin. Fick's law and Weibull's model were used to describe the release kinetics of Nisin.

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“…Non-noble metals such as zero valent iron (ZVI) have also been widely studied. [37][38][39][40] ZVI acts as a reducing agent in the presence of water, thus producing hydrogen gas for HDC reactions. 41 Lin and coworkers stated that among Pd/Fe, Pt/Fe, Ru/Fe and Au/Fe catalysts with 0.25% metal loading where 0.25% Pd/Fe exhibited the highest catalytic performance of all for aqueous phase HDC of TCE in the absence of hydrogen gas.…”

Section: Introductionmentioning

confidence: 99%

Effect of high-temperature on the swellable organically-modified silica (SOMS) and its application to gas-phase hydrodechlorination of trichloroethylene

Sohn¹,

Çelik²,

Gündüz³

et al. 2017

Applied Catalysis B: Environmental

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Pd catalysts supported on swellable organically-modified silica (SOMS) and high-temperaturetreated swellable organically-modified silica (H-SOMS) were characterized and tested for gasphase hydrodechlorination (HDC) of trichloroethylene (TCE) conditions. The high-temperature treatment on SOMS resulted in an increase in surface area and pore diameter as well as significant improvement of Pd dispersion on H-SOMS with smaller Pd particle sizes compared to the Pd/SOMS catalyst. Although the high-temperature treatment led to some alteration of the SOMS polysiloxane network, the hydrophobicity and organic vapor adsorption characteristics of SOMS were preserved. The reduction and oxidation characteristics of Pd on SOMS and HSOMS were investigated in situ using XANES technique. It was found that the Pd sites in the pores of SOMS was accessible to small molecules such as H 2 , facilitating the reduction of PdO x , whereas oxidation of metallic Pd was limited even at higher temperatures when O 2 was used. This effect was only observed over Pd/SOMS catalyst. For Pd/H-SOMS, because the pores were more widely open than Pd/SOMS, both reduction and oxidation of Pd were observed. Finally, the catalytic activity of Pd/H-SOMS for gas-phase HDC of TCE was significantly better than Pd/SOMS. When water was added to the reactant stream (TCE+H 2 O), both Pd/SOMS and Pd/H-SOMS maintained its catalytic performances due to hydrophobic property of the supports.

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Enhancement of Degradation and Dechlorination of Trichloroethylene via Supporting Palladium/Iron Bimetallic Nanoparticles onto Mesoporous Silica

Cited by 3 publications

References 25 publications

Relationship Between the Pore Structure of Mesoporous Silica Supports and the Activity of Nickel Nanocatalysts in the CO2 Reforming of Methane

Relationship Between the Pore Structure of Mesoporous Silica Supports and the Activity of Nickel Nanocatalysts in the CO2 Reforming of Methane

Study on the property of mesoporous silica nanoparticles loaded with nisin for poly (lactic acid)‐based packaging film

Effect of high-temperature on the swellable organically-modified silica (SOMS) and its application to gas-phase hydrodechlorination of trichloroethylene

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