“…Recently, cellulose derivatives have also been used as a template. For example, when ZIF‐8 was introduced into films of cellulose fibers, cellulose monoliths, and CNC hydrogels, the resulting materials showed good capability in air filtration, [17] catalysis, [18] and filament formation, [9] respectively. However, the ZIF‐8 crystals were heterogeneously and randomly synthesized owing to the difficulty of controlling nucleation only on the material surface [9, 17, 18] .…”