Morphology Evolution and Control of Mo‐polydopamine Coordination Complex from 2D Single Nanopetal to Hierarchical Microflowers

Abstract

Controllable synthesis of functional materials is of widespread interest for particle engineering. Such a method has not been widely promoted due to the lack of recognition of the fundamental principle, especially for organic-inorganic hybrid materials. Here, as an entrance, the controllable synthesis of Mo-polydopamine coordination flowers is realized through a facile foaming method, and a 2D nanopetal as the building monomer of the flower is synthesized. Depending on the morphology evolution of Mo-dopamine complex under different conditions, and the surface iterative topology growth of the Mo-polydopamine petal, the reasons of why the Mo-polydopamine complex self-assembles into a flower structure can be attributed to the synergistic effect of multicore symbiosis and structural self-protective growth behaviors. Benefiting from the strong structure stability of the Mo-polydopamine nanopetal, a hybrid structure of MoO quantum dot in situ anchoring in the N-doped 2D carbon framework is prepared by direct pyrolysis, which shows a highly reversible performance in application for lithium-ion secondary batteries (LIBs). This work enhances the possibility for the controllable synthesis of organic-inorganic hybrid materials by adjusting the multicore intergrowth and inhibiting the interfacial assembly.

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

“…These properties facilitate the fabrication of functional MOF thin films for the applications of gas storage and separation. [84] Zhang and co-workers also reported the preparation of 1D metal-organic nanotube through rolling up a MOF layer. [81] The Young's modulus of the MOF nanosheets is calculated to be 5 GPa.…”

“…This strategy has been also used for the preparation of MOF nanosheets [50,[165][166][167] Zhang and co-workers synthesized a series of tetrakis(4-carboxyphenyl)porphyrin (TCPP) based ultrathin 2D MOFs through a surfactant-assisted method, such as Zn-TCPP, Cu-TCPP, Cd-TCPP, Co-TCPP(Fe), Cu-TCPP(Fe), Zn-TCPP(Fe), and PPF-3 nanosheets. Other surfactants, such as sodium lauryl sulfate [84] and cetyltrimethyl ammonium bromide (CTAB) [170] have also been demonstrated effective to the synthesis of MOF nanosheets. [75] In each layer of bulk Zn-TCPP, one Zn 2 (COO) 4 paddlewheel metal node is coordinated with four TCPP ligands.…”

“…Typically, Co 3 O 4 /ZnO nanosheet obtained by calcination of bimetallic 2D CoZn-ZIF, showed uniform dispersion of Co and Zn on the bimetallic oxide nanosheets (Figure 14a-e). [71] Recently, the rationally designed metal coordination complexes, such as Fe-1,4-bis(1H-1,3,7,8-tetraazacyclopenta (1) phenanthren-2-yl) benzene (btcpb) nanosheets, [249] Cu(4,4′-bipy)(NO 3 ) 2 , [250] and Mo-polydopamine nanopetals, [84] have been served as precursors for the preparation of 2D metal-nitrogen doped carbon materials. [71] Recently, the rationally designed metal coordination complexes, such as Fe-1,4-bis(1H-1,3,7,8-tetraazacyclopenta (1) phenanthren-2-yl) benzene (btcpb) nanosheets, [249] Cu(4,4′-bipy)(NO 3 ) 2 , [250] and Mo-polydopamine nanopetals, [84] have been served as precursors for the preparation of 2D metal-nitrogen doped carbon materials.…”

“…[141] The CoCOP nanowires exhibited a high reversible capacity of 1107 mA h g −1 at a current density of 20 mA g −1 , and a long-cycling life for more than 1000 cycles at 1 A g −1 . Besides, LD metal oxide and sulfide-based composites, such as NiFe 2 O 4 /Fe 2 O 3 nanotubes, [240] Te@ZnCo 2 O 4 nanofibers, [113] MnO/C nanorods, [232] ZnO@ZnO quantum dots/C nanorod arrays, [114] Co/CoS 2 /CNT nanotubes, [65] and MoO 2 /N/C nanopetals, [84] have also been synthesized by calcination of corresponding LD MOF-based precursors recently. In addition, porous metal oxides obtained by pyrolysis of the specific LD MOFs have attracted intensive attention as electrodes for LIBs in the past years.…”

Two-dimensional metal–organic frameworks and their derivatives for electrochemical energy storage and electrocatalysis

“…10b-e). Other surfactants, such as cetyltrimethylammonium bromide (CTAB), and sodium lauryl sulfate (SLS), 66,98,99 have also been proved to be effective for the synthesis of 2D MOF nanosheets ( Fig. 10f-k).…”