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. 2020 Sep 18;426:213544. doi: 10.1016/j.ccr.2020.213544

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Fig. 4 — Microwave heating synthesis (a) Schematic illustration for principle (b) Digital images of large-scale microwave instrument of SAIREM. Copyright SAIREM. Sonochemical synthesis (c) Schematic illustration for principle. (d) Digital images of large-scale sonochemical instrument of Hielscher Ultrasonics GmbH. Copyright by © Hielscher Ultrasonics GmbH. (e) SEM images and crystallization curves for the synthesis of MIL-53(Fe) by sonochemistry synthesis (US), microwave heating synthesis (MW) and heating synthesis (SH). Adopted with permission from [87]. Copyright 2010 John Wiley and Sons.