Synthesis and characterization of Ni-MCM-41 for methyl blue adsorption

Shu, Yuehong; Shao, Yimin; Wei, Xiangyu; Wang, Xi; Sun, Qiangqiang; Zhang, Qiuyun; Li, Laisheng

doi:10.1016/j.micromeso.2015.05.006

Cited by 118 publications

(52 citation statements)

References 34 publications

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“…On the other hand, dissolving the cerium nitrate in water provides the Ce + –(NO 3 ) − bonding that creates the covalent bonding with the O − head of the broken silica chain . Afterward, the rod micelles containing the cerium elements arose in the medium and during the hydrothermal process the Ce‐MCM‐41 crystalline framework forms . Contemplating that the surfactant and participant compounds locate inside the micelles, the calcination is done to eliminate them .…”

Section: Resultsmentioning

confidence: 99%

“…40 Afterward, the rod micelles containing the cerium elements arose in the medium and during the hydrothermal process the Ce-MCM-41 crystalline framework forms. 51 Contemplating that the surfactant and participant compounds locate inside the micelles, the calcination is done to eliminate them. 52,53 Eventually, the almost pure Ce-MCM-41 synthesizes and gets ready for deployment in the next stages of catalyst preparation.…”

Section: Reaction Pathway For Doping Ce Into Mcm-41mentioning

confidence: 99%

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Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

2019

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Summary In present work, the aim of producing biodiesel from waste cooking oil was pursued by doping the cerium element into the MCM‐41 framework as catalyst with various Si/Ce molar ratio (5, 10, 25, 50, and Ce = 0). The catalytic performance and stability improved by employing the ultrasound irradiation in active phase loading step of catalyst preparation. The physicochemical characteristics of synthesized samples were investigated using various techniques as follows: Brunauer‐Emmett‐Teller (BET), X‐ray powder diffraction (XRD), Fourier transfer infrared (FTIR), energy‐dispersive X‐ray spectroscopy (EDX), transmission electron microscopy (TEM), and field emission scanning electron microscope (FESEM). The XRD patterns along with the results of FTIR and BET analysis revealed the MCM‐41 framework destruction while increasing the Ce content. The FESEM images of the nanocatalysts illustrated a well distribution and uniform morphology for the Ca/CeM (Si/Ce = 25). The particle size and size distribution of the Ca/CeM (Si/Ce = 25) were subsequently determined by TEM and FESEM images. The activity of fabricated nanocatalysts was evaluated by measuring the free acid methyl ester (FAME) content of produced biodiesel. The tests were carried out at constant operational conditions: T = 60°C, catalyst loading = 5 wt%, methanol/oil molar ratio = 9, and 6‐hour reaction time. A superior activity was observed for Ca/CeM (Si/Ce = 25) among other nanocatalysts with 96.8% conversion of triglycerides to biodiesel. The mentioned sample was utilized in five reaction cycles, and at the end of the fifth cycle, the conversion reached to 91.5% which demonstrated its significant stability.

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Section: Resultsmentioning

confidence: 99%

Section: Reaction Pathway For Doping Ce Into Mcm-41mentioning

confidence: 99%

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

2019

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“…As shown in Figure c, it can be observed that the adsorption capacity of Fe 3 O 4 /ZIF‐67 composite for DB80 increased rapidly with increasing DB80 concentration. This might be attributed to the driving force for the mass transfer from solution to the surface of the adsorbent (Shu et al, ). Moreover, the maximum adsorption capacity of Fe 3 O 4 /ZIF‐67 composite was achieved when the concentration of DB80 was 70 mg/L.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Fe₃O₄/ZIF‐67 composite for removal of direct blue 80 from water

Gao

Cui

et al. 2019

Water Environment Research

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Fe 3 O 4 /ZIF-67 composite was successfully fabricated by a facile method and used as adsorbent to remove direct blue 80 (DB80, azo dye) from water. Characterizations of Fe 3 O 4 /ZIF-67 composite were performed by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy (FTIR), and magnetic property analysis. As an adsorbent, the factors (such as adsorbent dose, pH, initial concentration, contact time, and temperature) affecting the adsorption performance of adsorbent were investigated. The optimal adsorption condition is 5 mg of Fe 3 O 4 /ZIF-67 composite in 8 ml of DB80 solution (70 mg/L) for 60 min at 318 K, and the pH value has little effect on the adsorption performance. The adsorption isotherm, kinetics, and thermodynamics of DB80 adsorbed on the Fe 3 O 4 /ZIF-67 composite were also studied. The experimental results revealed that the experimental data followed the Langmuir model and the adsorption behavior could be well explained by pseudosecond-order kinetic model. Thermodynamic analysis indicated that the adsorption was a spontaneous and endothermic process. Furthermore, the mechanism of DB80 adsorbed on the Fe 3 O 4 /ZIF-67 composite was proposed. The occurrence of adsorption might be caused by the π-π stacking interaction between Fe 3 O 4 /ZIF-67 composite and DB80.

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“…Mesoporous silica nanoparticles (MSNs) have been widely used as an adsorbent to remove of heavy metal ions or inorganic contaminants from aqueous solutions because of their large surface area, regular pore structure and highly controllable surface properties . In addition, MSNs have recently emerged as promising materials in controlled and targeted drug delivery systems due to low toxicity, thermal stability and high drug loading capacity as well as the aforementioned properties .…”

Section: Introductionmentioning

confidence: 99%

Chitosan/Polyvinylpyrrolidone/MCM‐41 Composite Hydrogel Films: Structural, Thermal, Surface, and Antibacterial Properties

et al. 2018

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The aim of this study is to characterize and investigate the effects of the Mobil Composition of Matter No. 41 (MCM-41) concentrations (0.5, 1, 3, 5, and 10 wt%) on structural, thermal, wettability, water content, oxygen (O 2 ) permeability, and swelling properties as well as morphological characteristics of chitosan/polyvinylpyrrolidone/MCM-41 (CH/PVP/MCM-41) composite hydrogel films. In addition, hydrolytic degradability, optic transmittance, and antibacterial properties of composite hydrogels films are determined as in vitro. With increasing of MCM-41 content, the composite hydrogels showed higher thermal stability, as expected. The morphologic properties of the composite hydrogel films are studied using scanning electron microscope (SEM) technique that provide evidence for good miscibility of CH, PVP, and MCM-41. The swelling and water-absorbing properties of the composite hydrogel films are significantly improved because of enhanced hydrophilic profile. Furthermore, the antimicrobial properties of the prepared composite hydrogel films are studied against Bacillus subtilis, Escherichia coli, and Candida albicans yeast. The results showed excellent antibacterial behavior of the composite hydrogel films. The study clearly demonstrates that the prepared CH/PVP/MCM-41 composite hydrogel films may be used as a promising candidate material in various fields such as drug delivery, wound healing material, and adsorbent materials.

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Synthesis and characterization of Ni-MCM-41 for methyl blue adsorption

Cited by 118 publications

References 34 publications

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

Fabrication of Fe₃O₄/ZIF‐67 composite for removal of direct blue 80 from water

Chitosan/Polyvinylpyrrolidone/MCM‐41 Composite Hydrogel Films: Structural, Thermal, Surface, and Antibacterial Properties

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Synthesis and characterization of Ni-MCM-41 for methyl blue adsorption

Cited by 118 publications

References 34 publications

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

Fabrication of Fe3O4/ZIF‐67 composite for removal of direct blue 80 from water

Chitosan/Polyvinylpyrrolidone/MCM‐41 Composite Hydrogel Films: Structural, Thermal, Surface, and Antibacterial Properties

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Fabrication of Fe₃O₄/ZIF‐67 composite for removal of direct blue 80 from water