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Volumn 121, Issue 1, 1999, Pages 254-255

Mesocellular siliceous foams with uniformly sized cells and windows [5]

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSIS; CHANNEL GATING; CHEMICAL REACTION; LETTER; MEMBRANE STRUCTURE; STRUCTURE ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; X RAY DIFFRACTION;

EID: 0033550516     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja983218i     Document Type: Letter
Times cited : (761)

References (32)
  • 8
    • 0345666843 scopus 로고    scopus 로고
    • note
    • 4F (23 mg, 0.6 mmol)-if desired- and 1,3,5-mmethylbenzene (TMB, 2.0 g, 17 mmol) were added. After at least 45 min at 35-40 °C, tetraethoxysilane (4.4 g, 21 mmol) was added. After 20 h at 35-40 °C, the cloudy mixture was kept at 95-100 (samples P- - -) or 120 °C (samples Z- - -) for 24 h. The filtered precipitate was dried in air (4.9 g of white, as-made silica). Typical yields: 94-100% based on Si. As-made silicas were calcined at 500 °C for 8 h in air to yield MCFs.
  • 9
    • 0027807060 scopus 로고
    • X-ray powder diffraction (XRD) patterns were recorded on a Scintag PADX diffractometer using Cu Kα radiation detected by a Si(Li) solid-state detector cooled by a Peltier cell. The data were desmeared by the direct method: Singh, M. A.; Ghosh, S. S.; Shannon, R. F. J. Appl. Crystallogr. 1993, 26, 787.
    • (1993) J. Appl. Crystallogr. , vol.26 , pp. 787
    • Singh, M.A.1    Ghosh, S.S.2    Shannon, R.F.3
  • 12
    • 0344803996 scopus 로고    scopus 로고
    • note
    • Transmission electron microscopy was performed on a JEOL 2000 microscope (200 kV) using copper grids.
  • 13
    • 0344372146 scopus 로고    scopus 로고
    • note
    • (a) Nitrogen sorption was carried out on a Micromeritics ASAP 2000 system at 77 K with samples outgassed at 180-200 °C under high vacuum for at least 4 h.
  • 18
    • 0344803992 scopus 로고    scopus 로고
    • note
    • Full-width-at-half-maximum (fwhm) values (Table 1) depend on the number of data points, equilibration time, etc., so they represent upper limits. We expect the actual size distributions to be smaller, which is in agreement with X-ray simulation experiments (see text).
  • 23
    • 0011403831 scopus 로고
    • For recent reviews, see: (a) Hüsing, H.; Schubert, U. Angew. Chem., Int. Ed. Engl. 1998, 37, 22. (b) Schneider, M.; Baiker, A. Catal. Rev.-Sci. Eng. 1995, 37, 515.
    • (1995) Catal. Rev.-Sci. Eng. , vol.37 , pp. 515
    • Schneider, M.1    Baiker, A.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.