【摘 要】
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Though widely used in our daily lives,volatile methylsiloxanes and derivatives are emerging contaminants and becoming a high-priority environment and public health concern.Developing effective sorbent materials can remove siloxanes in a cost-effective man
【机 构】
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Department of Chemistry,University of Puerto Rico,Río Piedras,San Juan,PR 00931,USA;Department of Ch
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Though widely used in our daily lives,volatile methylsiloxanes and derivatives are emerging contaminants and becoming a high-priority environment and public health concern.Developing effective sorbent materials can remove siloxanes in a cost-effective manner.Herein,by means of Grand Canonical Monte Carlo (GCMC) simulations,we evaluated the potentials of the recently proposed 68 stable zeolite-templated carbons (ZTCs) (PNAS 2018,115,E8116-E8124) for the removal of four linear methylsiloxanes and derivatives as well as two cyclic meth-ylsiloxanes by the calculated average loading and average adsorption energy values.Four ZTCs,namely ISV,FAU1,FAU3,and H8326836,were identified with the top 50% adsorption performance toward all the six targeted contaminants,which outperform activated carbons.Further first principles computations revealed that steric hindrance,electrostatic interactions (further enhanced by charge transfer),and CH-π interactions account for the outstanding adsorption performance of these ZTCs.This work provides a quick procedure to computationally screen promising ZTCs for siloxane removal,and help guide future experimental and theoretical investigations.
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