Ordered mesoporous silica particles and Si-MCM-41 for the adsorption of acetone: A comparative study

Hung, Chin‐Te; Bai, Hsun-Ling; Karthik, M.

doi:10.1016/j.seppur.2008.10.020

Cited by 65 publications

(30 citation statements)

References 23 publications

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“…The mesoporous V-Ti/MCM-41 catalysts were prepared by a hydrothermal method, which was based on a procedure described by Hung et al [36], using the following general gel composition (molar ratios) 1 SiO2: 0.2 CTAB: 0.89 H2SO4: 120 H2O. In our research, we named each catalyst with different metal loading weight ratios (V-Ti-Si), such as (2-0-100), (1-1-100), (0.25-2-100), (0.05-4-100), (0-5-100).…”

Section: Preparation Of Catalystsmentioning

confidence: 99%

Real-Time Raman Monitoring during Photocatalytic Epoxidation of Cyclohexene over V-Ti/MCM-41 Catalysts

Chan

Casilda

et al. 2015

Catalysts

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A series of V-and/or Ti-loading MCM-41 catalysts are successfully synthesized with a hydrothermal method. The photocatalytic and thermal epoxidations of cyclohexene in the presence of tert-butyl hydroperoxide (t-BuOOH) were investigated with real-time monitored by NIR-Raman spectroscopy. It suggests that both V-and Ti-loading can be responsible for the cyclohexene epoxidation. Moreover, the complementary behavior of V-and Ti-loading may be related to a similar role of activation. Interestingly, the progress of the photo-epoxidation on V0.25Ti2/MCM-41 photocatalyst was monitored by changes in intensity of the characteristic Raman bands without interference from the UV-light irradiation. The result, for the first time, reveals that cyclohexene was directly photo-epoxidized to 1,2-epoxycyclohexane by t-BuOOH during the reaction. A possible mechanism of cyclohexene photo-epoxidation is also proposed for this study.

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Section: Preparation Of Catalystsmentioning

confidence: 99%

Real-Time Raman Monitoring during Photocatalytic Epoxidation of Cyclohexene over V-Ti/MCM-41 Catalysts

Chan

Casilda

et al. 2015

Catalysts

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“…In this aspect, research studies on adsorptive removal of various VOCs over MCM-41, SBA-15, and MCM-48 have been reported (Serrano et al, 2004;Dou et al, 2011). Hung et al (2009) investigated the adsorption behaviors of acetone vapors over MCM-41 and ZSM-5 zeolite. It was demonstrated that MCM-41 revealed better adsorption capability and regeneration ability in comparison to the ZSM-5 zeolite, an adsorbent used in commercialized zeolite rotor concentrators (Lin et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Adsorption/Desorption Behaviors of Acetone over Micro-/Mesoporous SBA-16 Silicas Prepared from Rice Husk Agricultural Waste

Zeng

Bai

2016

Aerosol Air Qual. Res.

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The preparation of micro-/mesoporous SBA-16 adsorbent by rice husk derived sodium silicate as the silica source and its acetone adsorption/desorption behaviors were reported for the first time. The pore structural properties of waste-derived SBA-16 materials were controlled and optimized by adjusting the surfactant/silica molar ratios from 0.002 to 0.01 for achieving the best acetone adsorption performance. And the relationship between structural properties and acetone adsorption performances of SBA-16 adsorbents was investigated. The resultant waste-derived SBA-16 materials, denoted as RSBA-16, had specific surface areas of 575-1001 m 2 g -1 , pore sizes of 3.3-3.7 nm and pore volumes of 0.41-0.72 cm 3 g -1 . Among the studied adsorbents, RSBA-16(0.004) exhibited the highest saturated acetone adsorption capacity of 179 mg g -1 . It also showed excellent regeneration stability during 20 consecutive cycles. The results indicated that specific surface areas in both micro-and meso-pore ranges were the main factor that determined the superiority of acetone adsorption capacity of RSBA-16(0.004) over other adsorbents such as mesoporous RMCM-41 and micro-/mesoporous RSBA-15. The acetone adsorption experiments at 500-5000 ppmv demonstrated that the adsorption isotherm was well fitted with the Langmuir model, thus the adsorption of acetone on RSBA-16 might be a monolayer physisorption process. The results demonstrated the high adsorption capacity and cyclic stability of waste-derived RSBA-16(0.004) can be considered as a potential adsorbent for VOCs removals.

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“…VOCs abatement techniques can be divided into two categories, i.e., destructive (thermal, catalytic, and photocatalytic oxidation, bio-filtration) and recuperative (adsorption, absorption, condensation, membrane separation) [1,8,9]. Adsorption onto porous materials is a well-established, highly selective, energy efficient, and relatively inexpensive technique employed for the removal and recovery of VOCs from air, especially at a low concentration [1,3,5,6,[10][11][12][13][14][15][16][17][18]. Porous materials having large specific surface area and pore volume, including activated carbon and its derivatives [1][2][3][4]6,10,14,16,[19][20][21][22], alumina [18], natural clay [18], natural and modified zeolites [11,[23][24][25][26], are the most frequently applied adsorbents.…”

Section: Introductionmentioning

confidence: 99%

“…In this context, the selection of adsorbents with high adsorption and desorption performances is an important task. Various neat and hybrid adsorbents, e.g., silica-based materials [11,26,28], organic clay heterostructures [13], metal-organic frameworks (MOF) and MOF-based composites [15,17], hypercrosslinked polymeric resins [5,12], vegetable cellulose [30], have been tested for removal and recovery of VOC species from polluted air streams.…”

Section: Introductionmentioning

confidence: 99%

Volatile organic compounds adsorption onto neat and hybrid bacterial cellulose

Ion

Pârvulescu

Dobre

2015

Applied Surface Science

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Ordered mesoporous silica particles and Si-MCM-41 for the adsorption of acetone: A comparative study

Cited by 65 publications

References 23 publications

Real-Time Raman Monitoring during Photocatalytic Epoxidation of Cyclohexene over V-Ti/MCM-41 Catalysts

Real-Time Raman Monitoring during Photocatalytic Epoxidation of Cyclohexene over V-Ti/MCM-41 Catalysts

Adsorption/Desorption Behaviors of Acetone over Micro-/Mesoporous SBA-16 Silicas Prepared from Rice Husk Agricultural Waste

Volatile organic compounds adsorption onto neat and hybrid bacterial cellulose

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