Exceptional High and Reversible Ammonia Uptake by Two Dimension Few-layer BiI3 Nanosheets
Huiyong Wang1, Tao Song1, Zhiyong Li1
1Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China.
ACS Applied Materials & Interfaces
|May 28, 2021
Summary
Ammonia (NH3) capture is crucial for safety. Few-layer bismuth iodide (BiI3) nanosheets offer high capacity and recyclability for ammonia adsorption, showing promise for industrial applications.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Ammonia (NH3) emissions pose significant risks to human health and public safety.
- Effective capture and recovery of NH3 are highly desirable.
- Existing solid adsorbents often lack both high uptake capacity and good recyclability.
Purpose of the Study:
- To develop a novel material for efficient ammonia capture.
- To investigate the performance of few-layer bismuth iodide (BiI3) nanosheets for NH3 adsorption.
- To evaluate the recyclability and selectivity of BiI3 nanosheets for NH3 separation.
Main Methods:
- Few-layer BiI3 nanosheets were prepared using a liquid phase exfoliation strategy with green solvents.
- NH3 adsorption capacity was measured at 1.0 bar and 25 °C.
- Recyclability was tested over 10 adsorption-desorption cycles.
- Selectivity for NH3/CO2 separation was evaluated at 70 °C.
Main Results:
- BiI3 nanosheets achieved an NH3 adsorption capacity of 22.6 mmol/g, nearing record values.
- The NH3 uptake was fully reversible with no significant capacity loss after 10 cycles.
- BiI3 nanosheets demonstrated remarkable selectivity for NH3/CO2 separation (selectivity coefficient of 700 at 70 °C).
Conclusions:
- Few-layer BiI3 nanosheets are a promising, cost-effective material for efficient and recyclable ammonia capture.
- The material exhibits excellent selectivity for NH3/CO2 separation, suitable for industrial tail gas treatment.
- Superior performance is attributed to Bi3+-NH3 coordination interactions.
