Synthesis and characteristics of SBA-15 with thick pore wall and high hydrothermal stability

Wang, Junhong; Ge, Hongguang; Wang, Bao

doi:10.1016/j.matlet.2015.01.113

Cited by 56 publications

(32 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is well consistent with the TEM image ( Figure 3a). Thus, it can be concluded that the ordered mesoporous structure of plugged SBA-15 materials nearly do not be deteriorated on the addition of PVA [26][27][28] and decreasing dosages of P123 during the material synthesis. This is due to PVA as a soft template enhancing the level of silica condensation and improving the material structural properties, thus leading to an ordered mesoporous structure materials [26][27][28][29].…”

Section: Methodsmentioning

confidence: 91%

“…Furthermore, many of the cylindrical mesoporous are "plugged" with amorphous silica (Figure 3a,b white circles domains) which is in good accordance with a two-step desorption branch of the adsorption-desorption isotherms of PHTS-3 [22] ( Figure 2a). In addition, from Figure 3c, it can be seen that the structure and morphology of PHTS material changed obviously from short chain structure of SBA-15 [28] to irregular and rough surface morphology. This is completely the results of the plugs formation in the channel structure of PHTS material.…”

Section: Methodsmentioning

confidence: 95%

“…Plugged SBA-15 materials were synthesized according to our previous report [28] but made suitable modification. In a typical procedure, 1.0 g of P123 was dissolved in 60 mL 2 M HCl and 15 mL deionized H 2 O, then added 2 g, 3 g or 3.5 g of PVA powders, respectively.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

A novel and facile strategy for synthesis plugged SBA-15

Wang

Tian

et al. 2016

Materials Letters

Self Cite

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 95%

See 1 more Smart Citation

A novel and facile strategy for synthesis plugged SBA-15

Wang

Tian

et al. 2016

Materials Letters

Self Cite

View full text Add to dashboard Cite

“…[13][14][15][16][17][18] Thus, a variety of preconcentration procedures, including dispersive liquid-liquid extraction, 7 cloud point extraction, 8 electromembrane extraction 9 and co-precipitation, 10 have been investigated. Beside these methods, the widespread variety of solid materials suitable for solid phase extraction-preconcentration of uranium ions results in a large body of investigations concerning the application of this technique for determination of trace amounts of uranium ions in water samples.…”

Section: Introductionmentioning

confidence: 99%

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

et al. 2017

View full text Add to dashboard Cite

A solid-phase extraction based on a functionalized SBA-15, with the Schiff base ligand, ethylenediaminepropylesalicylaldimine (SBA/EnSA), was developed for the recovery and preconcentration of trace amounts of uranium(VI) in water samples, prior to its determination spectrophotometrically using ArsenazoIII. For optimizing the parameters affecting the adsorption step (pH, adsorbent dose and adsorption time) and those influencing the desorption process (concentration and volume of eluent and desorption time), a statistical technique response surface methodology (RSM) was employed. The limit of detection and the linear dynamic range for the proposed method were 10 μg L -1 , and 33.5 -500 μg L -1 , respectively. The adsorbent showed a high capacity (110.2 mg g -1 ) and the method allowed obtaining a preconcentration factor of 67. The inter-and intra-day relative standard deviations for a solution of 100 μg L -1 (n = 5) were found to be 4.8 -6.2%. The developed method was successfully applied for the determination of U(VI) in water samples.

show abstract

“…Various catalysts have been employed in catalytic ozonation processes to accelerate hydroxyl radical generation. Among the catalysts employed, mesoporous siliceous materials, for their large surface area and ordered structure, have attracted extensive attention . However, pure siliceous materials are non‐reactive owing to their lack of acidity and reaction active sites .…”

Section: Introductionmentioning

confidence: 99%

Effective catalytic ozonation for oxalic acid degradation with bimetallic Fe‐Cu‐MCM‐41: operation parameters and mechanism

Chen

Liu

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND The formation of carboxylic acid, especially oxalic acid (OA), limits the complete mineralization of organic pollutant in both ozonation and catalytic ozonation. Bimetallic catalyst is well known for its catalytic activity. In this study, bimetallic Fe‐Cu‐MCM‐41 is synthesized to accelerate ozone decomposition to ·OH and enhance OA degradation. RESULTS After the employment of Fe‐Cu‐MCM‐41/O3, 95% OA was removed at 60 min, which was much higher than that in Fe‐MCM‐41/O3 (23.4%), Cu‐MCM‐41/O3 (69.7%) and a single ozonation process (16.5%). Using pyridine adsorption–IR, ESR and XPS, a relationship was found between catalytic activity of catalysts, Lewis acid sites and electron transfer effect. OA degradations were found to follow a hydroxyl radical mechanism. The Fe‐Cu‐MCM‐41/O3 process was sensitive to pH value; a higher removal efficiency was achieved under alkaline conditions. Fe‐Cu‐MCM‐41 significantly accelerated ozone decomposition, hydroxyl radicals and hydrogen peroxide generation. CONCLUSIONS Co‐incorporating Fe and Cu successfully increased the number of Lewis acid sites on MCM‐41. Electron transfers between Fe(II/III), Cu(I/II) and O3 were also found. The joint function of Lewis sites and the electron transfer effect enhanced ·OH generation and OA degradation. Fe‐Cu‐MCM‐41 showed bright prospects for use in water treatment processes. © 2017 Society of Chemical Industry

show abstract

Synthesis and characteristics of SBA-15 with thick pore wall and high hydrothermal stability

Cited by 56 publications

References 23 publications

A novel and facile strategy for synthesis plugged SBA-15

A novel and facile strategy for synthesis plugged SBA-15

Multivariate Optimization of a Functionalized SBA-15 Mesoporous Based Solid-Phase Extraction for U(VI) Determination in Water Samples

Effective catalytic ozonation for oxalic acid degradation with bimetallic Fe‐Cu‐MCM‐41: operation parameters and mechanism

Contact Info

Product

Resources

About