English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Two methyl-modified Al 2 O 3 /SiO 2  xerogels, i. e. AIP-Al 2 O 3 /MSiO 2  and ANN-Al 2 O 3 /MSiO 2  xerogels, were prepared using aluminum isopropoxide and aluminum nitrate nonahydrate as the aluminum precursors, respectively. The appearance, density, viscosity, Gibbs activation energy for viscous flow and reaction rate constant of the sols were analyzed and compared. Their microstructures were characterized by means of powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and nitrogen adsorption–desorption measurements. The results show that the Al–O–Si bond is formed in the AIP-Al 2 O 3 /MSiO 2  and ANN-Al 2 O 3 /MSiO 2  xerogels. The ANN-Al 2 O 3 /MSiO 2  sol has a smaller mean particle size and greater sol stability than the AIP-Al 2 O 3 /MSiO 2  sol. Meanwhile, the ANN-Al 2 O 3 /MSiO 2  xerogel has a smaller pore size and higher porosity. The total pore volume and specific surface area of the ANN-Al 2 O 3 /MSiO 2  xerogel are 27.27% and 29.36% larger than those of the AIP-Al 2 O 3 / MSiO 2  sample, respectively. The saturated adsorption capacity of the ANN-Al 2 O 3 /MSiO 2  xerogel to methylene blue is 7.15% larger than that of the AIP-Al 2 O 3 /MSiO 2  xerogel.

Performance analysis and comparison of methyl-modified Al 2 O 3 /SiO 2 xerogels fabricated by two methods