A Facile Route to Synthesizing Functionalized Mesoporous SBA-15 Materials with Platelet Morphology and Short Mesochannels

Chen, Shih‐Yuan; Tang, Chengzhou; Chuang, Wei‐Tsung; Lee, Jey‐Jau; Tsai, Yi‐Ling; Chan, Jerry C. C.; Lin, Chin‐Tarng; Liu, Yucheng; Cheng, Sheng-Tzong

doi:10.1021/cm703500c

Cited by 163 publications

(100 citation statements)

References 51 publications

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“…1-2 lm by adding salts such as KCl and NaCl and keeping the synthesis solution in static condition (Yu et al 2002(Yu et al , 2004Zhao et al 2000). Recently, SBA-15 mesoporous silica with very short mesopore channels in the sub-micrometer scale has also been synthesized (Kosuge et al 2004;Sayari et al 2004;Chen et al 2008Chen et al , 2012Zhang et al 2006;Linton and Alfredsson 2008;Sujandi and Park 2008;Wang et al 2005). These short-channel SBA-15 materials offer significant advantages in the faster rate and the larger capacity for adsorption of bulky molecules, as well as in enzyme immobilization.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Lee

Chen

Cheng

et al. 2015

Int. J. Environ. Sci. Technol.

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Adsorption of copper and lead ions in aqueous solutions onto large-pore mesoporous silica materials functionalized with amino and mercapto groups and those with different morphologies including fiber-like, rod-like, and platelet was studied. The synthesized materials were characterized by techniques such as X-ray powder diffraction, nitrogen adsorption-desorption isotherms, scanning electron microscopy, and infrared spectra. Batch experiments were conducted to determine the adsorption processes. The equilibrium adsorption data agreed with Langmuir isotherms and revealed that four amino groups were required to form a stable surface complex with copper ions. Results indicated that initial adsorption rate onto platelet mesoporous adsorbent was rapid and faster than that of rod-like and fibrous morphologies due to its short channeling pores. Thiol-functionalized mesoporous silica adsorbents of all the morphologies have a better affinity for Pb 2? than the amino-mesoporous silica. In contrast, aminomesoporous silica has a stronger affinity for Cu 2? compared to thiol-mesoporous silica. The optimal Pb 2? uptake on thiol-mesoporous silica was in solution with pH in 2-6, while the highest Cu 2? uptake on amino-mesoporous silica was at pH 5.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Lee

Chen

Cheng

et al. 2015

Int. J. Environ. Sci. Technol.

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“…The SC-10 and SC-80 materials are homogeneously dispersed short columns with average pore length of around 450 nm (Fig. 3C-F), a little longer than that of the platelet materials synthesized by Chen et al [13]. The short column morphology is very different from the conventional SBA-15, which possesses rod or fiber morphology (Fig.…”

Section: Xrd and N 2 Adsorption/desorptionmentioning

confidence: 84%

“…As is known, mesoporous SBA-15 with different morphologies, such as fiber, rope, doughnut, sphere, gyroid and discoid, has been synthesized via different approaches [12]. Recently, a facile synthesis route for preparing SBA-15 type material with novel platelet mesostructure (pore length <350 nm) by introducing a small amount of Zr(IV) ions in the synthesis solution was reported by Cheng et al [13]. These materials may be superior to the conventional SBA-15 in facilitating molecular diffusion and less possibility of pore blockage, especially in the reactions of bulky molecules.…”

Section: Introductionmentioning

confidence: 99%

Nanometric palladium confined in mesoporous silica as efficient catalysts for toluene oxidation at low temperature

He¹,

Zhang²,

Yue³

et al. 2012

Applied Catalysis B: Environmental

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a b s t r a c tShort column SBA-15 supported Pd mesoporous catalysts with controllable acidity and expanded microporosity were firstly prepared through a simple "two-solvents" approach. The catalytic performances of the synthesized catalysts were evaluated for toluene oxidation. The characterization results reveal that Al atoms prefer to be tetrahedrally coordinated in the framework of the synthesized materials, and the acid sites can significantly promote Pd particle dispersion and metallic Pd oxidation due to their electrophilic characters. The Pd-confined catalysts possess high toluene turnover frequencies and toluene can be totally converted to CO 2 and H 2 O below 210 • C. The oxidation reaction can be suppressed by water vapor due to the formation of inactive Pd-hydroxides, and the synthesized catalyst has a good hydrothermal stability and high tolerance to moisture. Both the specific surface area and the toluene adsorption/desorption property are not the main factors determining the catalytic activity. Overall, the toluene oxidation performance is closely related to the support microporosity and acidity, the Pd dispersion and the CO 2 desorption capability.

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“…52 The development of periodic mesostructure is fulfilled by continued reorganization of the aggregates in further hydrothermal aging. [40][41][42][43]53,54 Because the condensation reaction is relatively slower at low temperature, 52 the initial precipitates formed during the induction period are expected to be flexible complexes with low condensation degree. 52,55 It is known that the high temperature could drive the surfactant aggregates to form more ordered superstructures.…”

Section: Effect Of Low-temperaturementioning

confidence: 99%

Promoted and Controllable Self-Assembly of Hydrolyzed Siloxane and Triblock Copolymer under Organic Polyhydroxy Acids

et al. 2009

Ind. Eng. Chem. Res.

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Large-molecule polyhydroxy organic acids such as tartaric acid and citric acid were found to significantly promote the cooperative formation of mesoporous silica SBA-15 with homogeneous well-defined hexagonal mesostructure under much weaker acidities without addition of volatile inorganic acids; therefore a novel environmental benign route for SBA-15 synthesis was developed. It is suggested that the polar groups of polyhydroxy acid molecules can greatly strengthen the assembly interactions between the silica species and the triblock copolymer by providing hydrogen bonding. More interestingly, by controlling the strength of hydrogen-bonding interaction that is dependent on the concentration of carboxylic acids, the particle size of the product can be tailored. The silica with small particle size synthesized with a small amount of polyhydroxy acids was favorable support of palladium catalyst for the complete oxidation of volatile organic compounds in atmosphere, probably due to the facilitated diffusion of reactant molecules.

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A Facile Route to Synthesizing Functionalized Mesoporous SBA-15 Materials with Platelet Morphology and Short Mesochannels

Cited by 163 publications

References 51 publications

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Adsorption of Pb(II) and Cu(II) metal ions on functionalized large-pore mesoporous silica

Nanometric palladium confined in mesoporous silica as efficient catalysts for toluene oxidation at low temperature

Promoted and Controllable Self-Assembly of Hydrolyzed Siloxane and Triblock Copolymer under Organic Polyhydroxy Acids

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