fig2

Figure 2. The illustration of classification and function of MOF and hydrogel materials. Reproduced with permission from ref^[44]. Copyright 2019 American Chemical Society. Reproduced with permission from ref^[45]. Copyright 2006 Slovensko Kemijsko Drustvo. Reproduced with permission from ref^[46]. Copyright 2018 Royal Society of Chemistry. Reproduced with permission from ref^[47]. Copyright 2020 Royal Society of Chemistry. Reproduced with permission from ref^[48]. Copyright 2017 Royal Society of Chemistry. Reproduced with permission from ref^[49]. Copyright 2008 American Chemical Society. Reproduced with permission from ref^[50]. Copyright 2022 Elsevier. Reproduced with permission from ref^[51]. Copyright 2021 Elsevier. MOF: Metal-organic framework.