Synergistic Effect of MIL-101/Reduced Graphene Oxide Nanocomposites on High-Pressure Ammonia Uptakeopen access
- Bae, Cheongwon; Jeong, Gyuyeong; Park, Suhyeon; Kim, Yeram; Gu, Mingyu; Kim, Duckjong; Kim, Juyeong
- Issue Date
- AMER CHEMICAL SOC
- ACS OMEGA, v.7, no.20, pp.17144 - 17150
- Journal Title
- ACS OMEGA
- Start Page
- End Page
- Ammonia has emerged as a potential working fluid in adsorption heat pumps (AHPs) for clean energy conversion. It would be necessary to develop an efficient adsorbent with high-density ammonia uptake under high gas pressures in the low-temperature range for waste heat. Herein, a porous nanocomposite with MIL-101(Cr)-NH2 (MIL-A) and reduced graphene oxide (rGO) was developed to enhance the ammonia adsorption capacity over high ammonia pressures (3-5 bar) and low working temperatures (20-40 degrees C). A one-pot hydrothermal reaction could form a two-dimensional sheet-like nanocomposite where MIL-A nanoparticles were well deposited on the surface of rGO. The MIL-A nanoparticles were shown to grow on the rGO surface through chemical bonding between chromium metal centers in MIL-A and oxygen species in rGO. We demonstrated that the nanocomposite with 2% GO showed higher ammonia uptake capacity at 5 bar compared with pure MIL-A and rGO. Our strategy to incorporate rGO with MIL-A nanoparticles would further be generalizable to other metal-organic frameworks for improving the ammonia adsorption capacity in AHPs.
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- 자연과학대학 > 화학과 > Journal Articles
- 공학계열 > Division of Mechanical and Aerospace Engineering > Journal Articles
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