2022
DOI: 10.1039/d2na00368f
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Hierarchically porous and mechanically stable monoliths from ordered mesoporous silica and their water filtration potential

Abstract: Mechanically stable structures with interconnected hierarchical porosity combine the benefits of both small and large pores, such as high surface area, pore volume, and good mass transport capabilities. Hence, lightweight...

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Cited by 11 publications
(17 citation statements)
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References 90 publications
(156 reference statements)
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“…[ 10,29,30 ] Furthermore, the upscaling of the synthesis by a factor of five might have slightly contributed to broadening of the pore diameter toward larger values as indicated from COK‐12 pore sizes obtained from batches upscaled by the factors 25 and 50, respectively. [ 9,12 ] In accordance with the larger mesopores of COK‐12‐X0.5+A, the pore volume and SSA increase up to 640 m 2 g −1 and 1.55 cm 3 g −1 , while the micropore volume remains at about 50% of the micropore volume of COK‐12‐X0 and COK‐12‐X0.5. The enhanced pore swelling and loss of microporosity due to aging at 90°C, despite the smaller p ‐xylene concentration, can be ascribed to two phenomena: On the one hand, the p ‐xylene undergoes thermal expansion with increasing temperature.…”
Section: Resultsmentioning
confidence: 69%
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“…[ 10,29,30 ] Furthermore, the upscaling of the synthesis by a factor of five might have slightly contributed to broadening of the pore diameter toward larger values as indicated from COK‐12 pore sizes obtained from batches upscaled by the factors 25 and 50, respectively. [ 9,12 ] In accordance with the larger mesopores of COK‐12‐X0.5+A, the pore volume and SSA increase up to 640 m 2 g −1 and 1.55 cm 3 g −1 , while the micropore volume remains at about 50% of the micropore volume of COK‐12‐X0 and COK‐12‐X0.5. The enhanced pore swelling and loss of microporosity due to aging at 90°C, despite the smaller p ‐xylene concentration, can be ascribed to two phenomena: On the one hand, the p ‐xylene undergoes thermal expansion with increasing temperature.…”
Section: Resultsmentioning
confidence: 69%
“…The slight deviation at low p ‐xylene concentrations is likely to be attributed to the lower sensitivity of the NLDFT method in comparison to SAXS, as previously reported. [ 12 ] For COK‐12‐X0.5+A, the deviation of the SAXS window sizes toward the ones obtained by NLDFT is substantial with differences up to 5.7 nm, which might likely be attributed to the disruption of the remaining hexagonal pore structure, hampering the fitting process of NLDFT, employing highly ordered structures, and possibly also to a small fraction of inaccessible pores. Besides the change in the mesopore window sizes, a decrease in the intensity of the volume‐weighted distribution of the mesopore windows can be observed from the SAXS data with increasing p ‐xylene content and temperature, see Figure S6, along with a broadening of the distribution, similar to the observed micropore development.…”
Section: Resultsmentioning
confidence: 99%
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