The role of N,N-dimethylformamide, a DCCA, in the formation of silica gel monoliths by sol-gel method

Adachi, Taiki; Sakka, Sumio

doi:10.1016/0022-3093(88)90464-4

Cited by 106 publications

(45 citation statements)

References 3 publications

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“…The suppression of the crystallite growth was more significant in the case of using FA, which had a viscosity of 4.3 mPa·s, than in the case of using PA, which had a viscosity of 1.52 mPa·s. The viscosity of PA was similar to that of water but its acidic property might have affected the growth of crystallites, as reported in other studies [47][48][49][50][51].…”

Section: Surface Area Of Dcca-added Catalystsupporting

confidence: 54%

Improved performance of Mo-V-Te-Nb-O x catalysts prepared from a solution containing drying control chemical additives in propane oxidation to acrylic acid

Kum

Park

Moon

2011

Korean J. Chem. Eng.

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Mo 1.0 V 0.4 Te 0.25 Nb 0.24 O x catalyst was prepared by hydrothermal synthesis in a solution containing a drying control chemical additive (DCCA) such as propionic acid (PA) or formamide (FA). The performance of the prepared catalysts in propane oxidation for producing acrylic acid (AA) was improved because the catalyst showed an increase in both the activity and AA selectivity. The activity was increased due to an increase in the surface area and in the oxygen mobility. The AA selectivity was increased due to a decrease in the number of acidic sites, which were responsible for the unselective and deep oxidation of intermediates. The catalyst performance was degraded when excess amounts of DCCA were used in the preparation step because the surface area decreased, due to the residues of DCCA, and the surface density of acidic sites increased.

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Section: Surface Area Of Dcca-added Catalystsupporting

confidence: 54%

Improved performance of Mo-V-Te-Nb-O x catalysts prepared from a solution containing drying control chemical additives in propane oxidation to acrylic acid

Kum

Park

Moon

2011

Korean J. Chem. Eng.

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“…DMF is a well known drying control chemical additive (DCCA), added in order to avoid the presence of micropores and to widen mesopores [21], before raising the pH from about 2 to 4 with 0.05 N NH 4 OH. This xerogel is transparent.…”

Section: Methodsmentioning

confidence: 99%

On the relationship between microstructure and densification of silica gels

Grandi

Mustarelli

Tomasi³

et al. 2004

Journal of Non-Crystalline Solids

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“…In order to shorten the reaction times and to enhance the drying behaviour of the gel network, Drying Control Chemical Additives (DCCAs) are often added to the sol [3,4,5]. The most commonly used one is formamide [6,7].…”

Section: Introductionmentioning

confidence: 99%

Structural evolution of a formamide modified sol—Spectroscopic study

Viart

Nižňanský

Rehspringer

1997

J Sol-Gel Sci Technol

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Abstract.We investigated the influence of formamide on the acid-catalyzed sol-gel process at 40~ by Fourier transformed infrared spectroscopy. Two silica sols were studied: one containing formamide and one without. Following the time evolution of both the Si--O(H) stretching vibration at around 950 cm -1 and the Si--O(--Si) vibration between 1080 and 1200 cm -1, we were able to describe the structural evolution of each sol. We thus observed, in the case of the formamide containing sol, a peculiar two-step structural evolution which eventually resulted in a highly interconnected gel.

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The role of N,N-dimethylformamide, a DCCA, in the formation of silica gel monoliths by sol-gel method

Cited by 106 publications

References 3 publications

Improved performance of Mo-V-Te-Nb-O x catalysts prepared from a solution containing drying control chemical additives in propane oxidation to acrylic acid

Improved performance of Mo-V-Te-Nb-O x catalysts prepared from a solution containing drying control chemical additives in propane oxidation to acrylic acid

On the relationship between microstructure and densification of silica gels

Structural evolution of a formamide modified sol—Spectroscopic study

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