Molybdenum Oxide Supported on Silica (MoO /SiO ): An Efficient and Reusable Catalyst for the Synthesis of 1,8-dioxodecahydroacridines Under Solvent-free Conditions

Khojastehnezhad, Amir

doi:10.29356/jmcs.v59i1.11

Cited by 8 publications

(9 citation statements)

References 22 publications

(25 reference statements)

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“…Furthermore, reduction of absorption peaks at 1760.23 and 1660.65 cm –1 (symmetric stretching of the epoxy ring) for the catalyst samples suggests the ring-opening cleavage of the epoxy groups by [CH 3 COCHC(O−)CH 3 ] 2 MoO 2 . Furthermore, the vibration at 996.71 cm –1 in the catalyst samples indicates the presence of Mo which gradually increases with Mo precursor loading …”

Section: Results and Discussionmentioning

confidence: 90%

“…Figure depicts the X-ray diffraction (XRD) patterns for GFER powder and calcined samples [Mo-free GFER, NCu–Mo 0.75 , NCu–Mo 1.0 , NCu–Mo 1.25 , and CCu–Mo 1.0 ]. Peaks representing the crystalline phase of copper oxide (37.264°, 43.303°, and 48.799°), molybdenum trioxide (13.76°), and molybdenum disilicide (29.94°) were detected for all catalysts. The diffraction patterns evidence the presence of copper (43.28°, 50.39°, and 74.12°) in GFER powder, which is attributed to the existence of copper oxide in all catalysts and calcined Mo-free GFER samples.…”

Section: Results and Discussionmentioning

confidence: 97%

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Printed Circuit Board-Derived Glass Fiber-Epoxy Resin-Supported Mo–Cu Bimetallic Catalyst for Glucose Synthesis

Barman

Chakraborty

2018

ACS Omega

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A glass fiber-epoxy resin (GFER) framework derived from mixed waste printed circuit boards (MWPCBs) was utilized to prepare a cost-effective, reusable Mo–Cu bimetallic Bronsted–Lewis solid acid catalyst through wet-impregnation under near-infrared radiation (NIRR) activation. The efficacy of the novel Mo–Cu catalyst was assessed in the synthesis of glucose through hydrolysis of jute ( Corchorus olitorius ) fiber, and the process parameters were optimized (Mo precursor loading: 1.0 wt %, catalyst concentration: 5 wt %, hydrolysis temperature: 80 °C, and hydrolysis time: 10 min) through Taguchi orthogonal design. The GFER support and the prepared catalysts were characterized through thermogravimetric, X-ray diffraction (XRD), Fourier-transform infrared (FTIR), Brunauer–Emmett–Teller (BET)–density functional theory, and TPD analyses. The optimal Mo–Cu catalyst and the GFER support possessed 45.377 and 7.049 m 2 /g BET area, 0.04408 and 0.02317 cc/g pore volume, 1.9334 and 0.7482 nm modal pore size, and surface acidity of 0.48 and 0.40 mmol NH 3 /g catalyst, respectively. X-ray photoelectron spectroscopy bands confirmed the coexistence of Mo 6+ and Cu 2+ species; XRD and FTIR analyses indicated the presence of MoO 3 and CuO crystalline phases in all prepared catalysts. The optimal catalyst prepared through NIRR (wavelength 0.75–1.4 μm)-activated hydrothermal treatment resulted in a significantly greater glucose yield (75.84 mol %) than that achieved (53.64 mol %) using a conventionally prepared catalyst. Thus, an energy-efficient application of NIRR (100 W) could significantly improve catalytic properties over conventional hydrothermal treatment (500 W). The present investigation provides an innovative application of MWPCB-derived GFER as a promising cost-effective support for the preparation of highly efficient inexpensive solid catalysts for sustainable synthesis of glucose from low-cost waste jute fiber.

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Section: Results and Discussionmentioning

confidence: 90%

Section: Results and Discussionmentioning

confidence: 97%

Printed Circuit Board-Derived Glass Fiber-Epoxy Resin-Supported Mo–Cu Bimetallic Catalyst for Glucose Synthesis

Barman

Chakraborty

2018

ACS Omega

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“…The band at 1631 cm −1 is correlated to the O-H deformation bending vibration of physically absorbed water. The broad band centered at 3400 cm −1 is due to silanol groups having cross hydrogen bonding which interacts with the adsorbed water molecules [71,72]. It is also observed the characteristic bands for vibrations of the C-H bonds (2926, 1927 and 1882 cm −1 ) of methylene groups [73,74].…”

Section: Ftir Analysismentioning

confidence: 86%

Development of an Adsorbing System Made of DMS-1 Mesh Modified by Amino Groups to Remove Pb(II) Ions from Water

et al. 2020

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Water pollution by heavy metals represents several health risks. Conventional technologies employed to eliminate lead ions from residual or drinking water are expensive, therefore an efficient and low-cost technique is required and adsorption processes are a good alternative. In this work, the goal was to determine the adsorption capacity of a Disordered Mesoporous Silica 1 material (DMS-1) functionalized with amino groups, for Pb(II) ions removal. DMS-1 was prepared by sol-gel method and the incorporation of amino groups was performed by ex-situ method. As the source of amine groups, (3-Aminopropyl) triethoxysilane (APTES) was used and three different xNH2/DMS-1 molar ratios (0.2, 0.3, 0.4) were evaluated. In order to evaluate the incorporation of the amino group into the mesopore channels, thermal and structural analysis were made through Thermogravimetric Analysis (TGA), nitrogen adsorption–desorption at 77 K by Specific Brunauer–Emmett–Teller (SBET) method, Fourier Transfer Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and X-Ray Photoelectron Spectroscopy (XPS). The higher Pb(II) ions removal was achieved with the 0.3 molar proportion of xNH2/DMS-1 reaching 99.44% efficiency. This result suggests that the functionalized material can be used as an efficient adsorbent for Pb(II) ions from aqueous solution.

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“…Among all of the transition metal catalysts used in carbon-carbon coupling reactions, cobalt has gained great attention due to its precious properties such as eco-friendly, low cost, nontoxicity, and good availability; therefore, many studies have shown the implementation of catalytic systems based on cobalt with the usage of various linkers in carbon-carbon coupling reactions [16,29,30]. 1 3 Silica-coated magnetic nanoparticles functionalized cobalt… Heterogeneous catalysts have played an important role in many catalyst systems because of their potential applications [31][32][33][34][35][36][37][38][39][40][41][42]. Among these, magnetite nanoparticles (MNPs) and especially Fe 3 O 4 showed that they possess valuable features such as easy separation and recycling by using an external magnetic field to avoid wasting catalyst after the end of the reaction [43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Silica-coated magnetic nanoparticles functionalized cobalt complex: a recyclable and efficient catalyst for the C−C bond formation

Haqjow¹,

Raoufi

2021

Res Chem Intermed

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In this study, the Co-based catalyst was prepared by cobalt immobilization on the surface of functionalized silica-coated magnetic NPs (Fe 3 O 4 @SiO 2 -CT-Co) as a magnetically core-shell nanocatalyst and characterized by FT-IR, TGA, XRD, VSM, SEM, TEM, EDX, EDX mapping, and ICP techniques and appraised in the Suzuki-Miyaura cross-coupling reaction under mild reaction conditions. The results displayed the superparamagnetic behavior of the Fe 3 O 4 NPs core encapsulated by SiO 2 shell, and the size of the particles was estimated about 30 nm. Compared with the previously reported catalysts, the engineered Fe 3 O 4 @SiO 2 -CT-Co catalyst provided perfect catalytic performance for the Suzuki-Miyaura cross-coupling reaction in water as a green solvent and it was much cheaper in the comparison with the traditional Pd-based catalysts. Importantly, the durability of magnetic nanocatalyst was studied and observed that it is stable under the reaction conditions and could be easily reused for at least six successive cycles without any significant decrease in its catalytic activity.

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Molybdenum Oxide Supported on Silica (MoO /SiO ): An Efficient and Reusable Catalyst for the Synthesis of 1,8-dioxodecahydroacridines Under Solvent-free Conditions

Cited by 8 publications

References 22 publications

Printed Circuit Board-Derived Glass Fiber-Epoxy Resin-Supported Mo–Cu Bimetallic Catalyst for Glucose Synthesis

Printed Circuit Board-Derived Glass Fiber-Epoxy Resin-Supported Mo–Cu Bimetallic Catalyst for Glucose Synthesis

Development of an Adsorbing System Made of DMS-1 Mesh Modified by Amino Groups to Remove Pb(II) Ions from Water

Silica-coated magnetic nanoparticles functionalized cobalt complex: a recyclable and efficient catalyst for the C−C bond formation

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