A new type of super hydrophilic SiO2 aerogel for use as a potential NH3 sorbent

Benlan Lin; Juqi Ruan; Sheng Cui; Xiaodong Shen; Shuwen Yu

doi:10.2174/1573413710666140904001135

A new type of super hydrophilic SiO₂ aerogel for use as a potential NH₃ sorbent

Benlan Lin, Juqi Ruan, Sheng Cui, Xiaodong Shen, Shuwen Yu

College of Materials Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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 physical chemical 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.

Original language	English
Pages (from-to)	120-128
Number of pages	9
Journal	Current Nanoscience
Volume	11
Issue number	1
DOIs	https://doi.org/10.2174/1573413710666140904001135
State	Published - 1 Jan 2015

Keywords

Aerogel
Physical-chemical adsorption
Regenerability
Sorbent
Super hydrophilic
Water vapor treating

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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 (qm) 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 physical chemical adsorption process of NH3 appeared in the presence of water vapor on the SHSA surface, giving a maximum adsorption capacity (Qm) of 193.66 mg/g. The regenerability of SHSA was also investigated, and the loss percentage of Qm 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.",

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AU - Ruan, Juqi

AU - Cui, Sheng

AU - Shen, Xiaodong

AU - Yu, Shuwen

PY - 2015/1/1

Y1 - 2015/1/1

N2 - 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 (qm) 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 physical chemical adsorption process of NH3 appeared in the presence of water vapor on the SHSA surface, giving a maximum adsorption capacity (Qm) of 193.66 mg/g. The regenerability of SHSA was also investigated, and the loss percentage of Qm 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.

AB - 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 (qm) 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 physical chemical adsorption process of NH3 appeared in the presence of water vapor on the SHSA surface, giving a maximum adsorption capacity (Qm) of 193.66 mg/g. The regenerability of SHSA was also investigated, and the loss percentage of Qm 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.

KW - Aerogel

KW - Physical-chemical adsorption

KW - Regenerability

KW - Sorbent

KW - Super hydrophilic

KW - Water vapor treating

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A new type of super hydrophilic SiO₂ aerogel for use as a potential NH₃ sorbent

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Keywords

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