Synthesis of macro-mesoporous alumina with yeast cell as bio-template

Biotemplated fabrication of porous alumina ceramics with controllable pore size using bioactive yeast as pore-forming agent

“…As can be seen, the zeta potential of the yeast cell in aqueous solution is negative charge in the measured pH range of 3-10, and the size of the oval-like yeast cell is about 3-5 μm. Then after the addition of Al 3 þ ions solution, Al 3 þ could uniformly adhere to the electronnegative yeast cell surfaces to form the coreshell structure via electrostatic attraction [11,17], as shown in Fig. 1.…”

“…The objective of the present work was to fabricate porous alumina ceramics with controlled pore morphology and narrow pore size distribution, using bioactive yeast cell as a poreforming agent [17,18]. The effects of mass ratios of yeast cell to alumina and calcination temperature on the phase development, microstructure and pore size distribution of the porous ceramic were investigated.…”

An Overview on Zeolite Shaping Technology and Solutions to Overcome Diffusion Limitations

“…Samples with surface area up to 511 m 2 /g and mesopores of 5.4-33.1 nm were produced, depending on the type of gel used; aerogel versus xerogel. Finally, Ma et al [68] proposed the use of bio-templates to form meso-macroporous aluminas. The template used in the study was a yeast aqueous solution added to a solution of Al(NO3)3·9H2O and triethanolamine.…”

“…SEM images showed a macroporous structure with pore sizes between 1.5-3 µm, whose walls were impregnated by mesopores between 3-4.5 nm as determined by N2 adsorption/desorption isotherms, also giving birth to surface area values of about 340 m 2 /g. A raise Finally, Ma et al [68] proposed the use of bio-templates to form meso-macroporous aluminas. The template used in the study was a yeast aqueous solution added to a solution of Al(NO 3 ) 3 ·9H 2 O and triethanolamine.…”

Improving textural properties of γ-alumina by using second generation biomass in conventional hydrothermal method

“…As an alternative to these sophisticated methods, alumina with BET area comprised between 230 and 315 m 2 /g and pore diameter in the range of 3e4 nm were prepared in the presence of methyl-cellulose [12]. Yeast cells were also used for preparing alumina [13], resulting in macro-and mesopores in the range of 1.5e3 mm and 3e4 nm, respectively. Likewise, specific surface areas up to 343 m 2 /g were achieved.…”