MOF-derived hierarchical carbon/ZnO hybrid synergistically boosts photothermal conversion and storage capability of phase change materials

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Author(s)
Li, A
Wan, Y
Gao, Y
Tang, Z
Xu, J
Huang, M
Li, Y
Zhang, X
Chen, X
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2022
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Abstract

The weak photon-capturing ability is a long-standing bottleneck for pristine metal–organic framework (MOF)-based phase change materials (PCMs) in photothermal conversion and latent heat storage applications. Herein, we designed MOF-5-derived hierarchical nanoporous carbon/ZnO nanoparticle hybrid as dual efficient photonic harvester and molecular heater for synergistically boosting photothermal conversion and storage capability of PCMs using an in-situ anchoring strategy. Compared with post-decorated ZnO strategy, ZnO photosensitizers derived in situ from MOF-5 are capable of guaranteeing high dispersibility and enhanced photon-capturing capability in the hierarchical carbon framework. Resultantly, high-performance photothermal composite PCMs are obtained due to the constructed intense and broadband absorption photonic nanoheaters after paraffin wax (PW) is encapsulated inside MOF-5-derived hierarchical nanoporous carbon/ZnO (MOF-5-PC/ZnO). Benefiting from the synergistic effect of dual high-efficiency photonic harvester and molecular heater (MOF-5-derived ZnO nanoparticles and hierarchical nanoporous carbon), PW@MOF-5-PC/ZnO-700 °C composite PCMs obtain the optimal photothermal conversion and storage capacity. Meanwhile, PW@MOF-5-PC/ZnO composite PCMs exhibit superior shape stability, thermal stability, and durable reliability. Importantly, our proposed development strategy of high-efficiency photothermal composite PCMs is universal due to high customization and universality of PCMs and Zn-MOFs.

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Materials Today Nano

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20

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Nanomaterials

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Li, A; Wan, Y; Gao, Y; Tang, Z; Xu, J; Huang, M; Li, Y; Zhang, X; Chen, X, MOF-derived hierarchical carbon/ZnO hybrid synergistically boosts photothermal conversion and storage capability of phase change materials, Materials Today Nano, 2022, 20, pp. 100277

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