TY - JOUR
T1 - Introduction of cobaltous thiocyanate to mesoporous SBA-15 for ultrafast and high-capacity adsorption of ammonia with visual color indication
AU - Li, Yongsheng
AU - Cheng, Fuqiang
AU - Cui, Caihui
AU - Meng, Zihui
AU - Xue, Min
N1 - Publisher Copyright:
© 2025
PY - 2025/5
Y1 - 2025/5
N2 - The development of ammonia adsorbents endowed with both high adsorption capacity and rapid adsorption kinetics represents one of the most effective pathways for ammonia capture and separation. In this work, the Lewis acid Co(II) and the hydrogen-bonding ligand SCN− were impregnated onto the mesoporous material SBA-15, which exhibits high hydrothermal stability and a large specific surface area. Thereby, a novel series of Co@SBA-15 composites was fabricated, demonstrating ultrafast, highly efficient, and reversible adsorption of NH3. Specifically, an ammonia uptake of 108.9 mg (g Co@SBA-15) −1 was achieved within 3 min at 20 °C and 0.1 MPa. Moreover, the incorporation of cobalt thiocyanate induced a noticeable color change during the adsorption process, which provides a visual indicator for determining the adsorption saturation of this absorbent. The reusability and humidity resistance of this mesoporous adsorbent were further confirmed through adsorption performance tests under humid conditions and five consecutive adsorption–desorption cycles. This work not only proposes a novel design strategy for ammonia adsorbents but also highlights the potential applications of cobalt thiocyanate-functionalized mesoporous silica materials in emergency scenarios, such as ammonia leakage incidents in industrial settings.
AB - The development of ammonia adsorbents endowed with both high adsorption capacity and rapid adsorption kinetics represents one of the most effective pathways for ammonia capture and separation. In this work, the Lewis acid Co(II) and the hydrogen-bonding ligand SCN− were impregnated onto the mesoporous material SBA-15, which exhibits high hydrothermal stability and a large specific surface area. Thereby, a novel series of Co@SBA-15 composites was fabricated, demonstrating ultrafast, highly efficient, and reversible adsorption of NH3. Specifically, an ammonia uptake of 108.9 mg (g Co@SBA-15) −1 was achieved within 3 min at 20 °C and 0.1 MPa. Moreover, the incorporation of cobalt thiocyanate induced a noticeable color change during the adsorption process, which provides a visual indicator for determining the adsorption saturation of this absorbent. The reusability and humidity resistance of this mesoporous adsorbent were further confirmed through adsorption performance tests under humid conditions and five consecutive adsorption–desorption cycles. This work not only proposes a novel design strategy for ammonia adsorbents but also highlights the potential applications of cobalt thiocyanate-functionalized mesoporous silica materials in emergency scenarios, such as ammonia leakage incidents in industrial settings.
KW - Ammonia adsorption
KW - Cobaltous thiocyanate functionalized
KW - Fast adsorption kinetics
KW - Mesoporous SBA-15
KW - Visual indication
UR - http://www.scopus.com/inward/record.url?scp=105002658888&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2025.113936
DO - 10.1016/j.matdes.2025.113936
M3 - Article
AN - SCOPUS:105002658888
SN - 0264-1275
VL - 253
JO - Materials and Design
JF - Materials and Design
M1 - 113936
ER -