SO2 capture and detection with carbon microfibers (CMFs) synthesised from polyacrylonitrile†
Ana
Yañez-Aulestia, 
a
Valeria B.
López-Cervantes,
b
Diego
Solis-Ibarra,
b
Ilich A.
Ibarra,
bc
Elí
Sánchez-González
*b
and
a
Valeria B.
López-Cervantes,
b
Diego
Solis-Ibarra,
b
Ilich A.
Ibarra,
bc
Elí
Sánchez-González
*b
and
Abstract
SO2 emissions not only affect local air quality but can also contribute to other environmental issues. Developing low-cost and robust adsorbents with high uptake and selectivity is needed to reduce SO2 emissions. Here, we show the SO2 adsorption–desorption capacity of carbon microfibers (CMFs) at 298 K. CMFs showed a reversible SO2 uptake capacity (5 mmol g−1), cyclability over ten adsorption cycles with fast kinetics and good selectivity towards SO2/CO2 at low-pressure values. Additionally, CMFs’ photoluminescence response to SO2 and CO2 was evaluated.
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