Mesoporous silicas prepared by ammonium perchlorate oxidation and theirs application in the selective adsorption of high explosives

Yang, Rongji; Gao, Dayuan; Huang, Hui; Huang, Bing; Cai, Huaqiang

doi:10.1016/j.micromeso.2012.09.038

Cited by 14 publications

(6 citation statements)

References 41 publications

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“…IBN-4 type mesoporous silica nanoparticles were prepared by following a previously published method [ 75 ], where 1 g of pluronic acid P123 and 2.8 g of FC-4 (C 3 F 7 O(CFCF 3 CF 2 O) 2 CFCF 3 CONH(CH 2 ) 3 N + (C 2 H 5 ) 2 CH 3 I − ) were dissolved in 160 mL of 0.02 M HCl at 45 °C. After complete dissolution of the surfactant, TEOS (4 g) was added and the reaction mixture was stirred at room temperature for 20 h. The pristine IBN-4 particles were collected by centrifugation at 12,000 rpm for 17 min, and the copolymer templates were further removed by ammonium perchlorate (AP) [ 76 ]. To create oxidative conditions, approximately 0.2 g of the IBN-4 solids was treated with 0.4 g of AP in 20 mL of a 10 M HNO 3 solution under 100 °C for 12 h. The solid products were washed with dd-H 2 O and collected by centrifugation at 12,000 rpm for 17 min.…”

Section: Methodsmentioning

confidence: 99%

Utilization of Enzyme-Immobilized Mesoporous Silica Nanocontainers (IBN-4) in Prodrug-Activated Cancer Theranostics

et al. 2015

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To develop a carrier for use in enzyme prodrug therapy, Horseradish peroxidase (HRP) was immobilized onto mesoporous silica nanoparticles (IBN-4: Institute of Bioengineering and Nanotechnology), where the nanoparticle surfaces were functionalized with 3-aminopropyltrimethoxysilane and further conjugated with glutaraldehyde. Consequently, the enzymes could be stabilized in nanochannels through the formation of covalent imine bonds. This strategy was used to protect HRP from immune exclusion, degradation and denaturation under biological conditions. Furthermore, immobilization of HRP in the nanochannels of IBN-4 nanomaterials exhibited good functional stability upon repetitive use and long-term storage (60 days) at 4 °C. The generation of functionalized and HRP-immobilized nanomaterials was further verified using various characterization techniques. The possibility of using HRP-encapsulated IBN-4 materials in prodrug cancer therapy was also demonstrated by evaluating their ability to convert a prodrug (indole-3-acetic acid (IAA)) into cytotoxic radicals, which triggered tumor cell apoptosis in human colon carcinoma (HT-29 cell line) cells. A lactate dehydrogenase (LDH) assay revealed that cells could be exposed to the IBN-4 nanocomposites without damaging their membranes, confirming apoptotic cell death. In summary, we demonstrated the potential of utilizing large porous mesoporous silica nanomaterials (IBN-4) as enzyme carriers for prodrug therapy.

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Section: Methodsmentioning

confidence: 99%

Utilization of Enzyme-Immobilized Mesoporous Silica Nanocontainers (IBN-4) in Prodrug-Activated Cancer Theranostics

et al. 2015

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“…In addition, they have applications in the diverse field [1,2]. The AP has defined role in the fields like military and aerospace [3][4][5]. As constitute in the composite solid propellants (CSPs), role of AP is vital and main oxidizing agents.…”

Section: Introductionmentioning

confidence: 99%

“…As constitute in the composite solid propellants (CSPs), role of AP is vital and main oxidizing agents. It has a vast influence over the burning performance [1][2][3][4][5] of CSPs. The production of huge amount of burning gases from propellants especially associated with its burning rate with curtailed time and it is necessary to empower rockets to take off at faster speeds.…”

Section: Introductionmentioning

confidence: 99%

Investigation the catalytic profile of Eu and Pr doped CeO2 nanoparticles for the thermal behavior of AP

Vara

Dave

2019

SN Appl. Sci.

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In these studies we report the catalytic proficiency of two Eu and Pr doped CeO 2 nanoparticles on the thermal behaviour of powder AP and CSPs samples. A co-precipitation method was used for synthesizing Eu and Pr doped CeO 2 nanoparticles and they were characterized by XRD, FTIR, and SEM with EDX. The catalytic proficiency of both Eu and Pr doped CeO 2 nanoparticles were investigated by utilizing TG-DSC technique. The FWO, KAS, and Starink methods were used to determine activation energies of all catalyzed AP and CSPs samples. The catalytic proficiency increased by addition of Eu and Pr doped CeO 2 nanoparticles and decomposition temperature decreased in the presence of catalyst. The activation energy decreased by the addition of Eu and Pr doped CeO 2 nanoparticles in AP and CSPs, the burning rate of CSPs found to increase by the addition of Eu and Pr doped CeO 2 nanoparticles. The Pr doped CeO 2 nanoparticles showed good catalytic efficiency on AP and CSPs that reduced the decomposition temperature around 70 °C for AP and 20 °C for CSPs. The activation energy of CSPs catalyzed by Pr doped CeO 2 nanoparticles reported 150.12, 147.60, and 146.83 kJ mol −1 by FWO, KAS, and Starink method respectively which decreases in existence of catalyst in CSPs.

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“…In recent years, porous materials such as porous silica and metal oxide have been widely used for adsorption because of their structural flexibility. It should be noted that these porous materials have some shortcomings such as high cost, low yield, and easily-caused secondary pollution because they are difficult to degrade . Alternative adsorbents from industrial wastes and natural materials with low-cost and easy degradation properties have been widely investigated recently. , …”

Section: Introductionmentioning

confidence: 99%

Adsorption of Uranium(VI) from a Simulated Saline Solution by Alkali-Activated Leather Waste

Yan

Luo

Zou

et al. 2017

Ind. Eng. Chem. Res.

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A porous adsorbent was prepared from leather waste by activation with alkali. The adsorbent, alkali-activated leather waste (AALW), was applied to adsorb uranium(VI) and characterized by scanning electron microscopy, energy-dispersive X-ray detection, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The influence of the pH, initial uranium(VI) concentration, temperature, and contact time on the adsorption of uranium(VI) was systematically investigated. The adsorption of uranium(VI) on AALW obeyed the Langmuir isotherm model and was attributed to ion exchange and complexation coordination. Thermodynamic and kinetic studies showed that the adsorption process was spontaneous and endothermic, and it reached adsorption equilibrium in 360 min. Moreover, the selective adsorption of uranium(VI) from an aqueous solution containing coexisting ions and adsorption of trace uranium(VI) from a simulated high-salinity environment showed that AALW had not only a strong affinity but a high selectivity for uranium(VI).

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Mesoporous silicas prepared by ammonium perchlorate oxidation and theirs application in the selective adsorption of high explosives

Cited by 14 publications

References 41 publications

Utilization of Enzyme-Immobilized Mesoporous Silica Nanocontainers (IBN-4) in Prodrug-Activated Cancer Theranostics

Utilization of Enzyme-Immobilized Mesoporous Silica Nanocontainers (IBN-4) in Prodrug-Activated Cancer Theranostics

Investigation the catalytic profile of Eu and Pr doped CeO2 nanoparticles for the thermal behavior of AP

Adsorption of Uranium(VI) from a Simulated Saline Solution by Alkali-Activated Leather Waste

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