A New Type of Super Hydrophilic SiO2 Aerogel for Use as a Potential NH3 Sorbent

Title:A New Type of Super Hydrophilic SiO2 Aerogel for Use as a Potential NH3 Sorbent

Volume: 11 Issue: 1

Author(s): Benlan Lin, Juqi Ruan, Sheng Cui, Xiaodong Shen and Shuwen Yu

Affiliation:

Keywords: Aerogel, physical-chemical adsorption, regenerability, sorbent, super hydrophilic, water vapor treating.

Abstract: A super hydrophilic SiO₂ aerogel (SHSA) was prepared using the sol-gel method and CO₂ supercritical drying technology, yielding a specific surface area of 680.08 m²/g and a total pore volume of 3.95 cm³/g. The hydrophilic property of the SHSA was investigated and showed a maximum water adsorption capacity (q_m) of 7.79 ml/g. NH₃ adsorption tests were conducted and were compared with the results for pure SiO₂ aerogel (PSA) under non-water vapor and water vapor treating conditions. The effect of water vapor on SHSA was found to be larger than its effect on PSA. A physicalchemical adsorption process of NH₃ appeared in the presence of water vapor on the SHSA surface, giving a maximum adsorption capacity (Q_m) of 193.66 mg/g. The regenerability of SHSA was also investigated, and the loss percentage of Q_m was found to be 22.28% over 10-cycle adsorption tests. The results indicate that SHSA is a promising candidate for use as an NH₃ sorbent.

Cite this article as:

Lin Benlan, Ruan Juqi, Cui Sheng, Shen Xiaodong and Yu Shuwen, A New Type of Super Hydrophilic SiO2 Aerogel for Use as a Potential NH3 Sorbent, Current Nanoscience 2015; 11 (1) . https://dx.doi.org/10.2174/1573413710666140904001135