Direct conversion of two-dimensional ZIF-L film to porous ZnO nano-sheet film and its performance as photoanode in dye-sensitized solar cell

Liu, Qi; Low, Ze Xian; Feng, Yi; Leong, Soo Kwan; Zhong, Zhaoxiang; Yao, Jianfeng; Hapgood, Karen; Wang, Huanting

doi:10.1016/j.micromeso.2014.03.023

Cited by 51 publications

(24 citation statements)

References 39 publications

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“…The FTIR data (Figure S3 in the Supporting Information) further confirm full transformation of Zn/Co‐MOF/NF into Zn‐Co‐S/NF. The FTIR spectrum of Zn/Co‐MOF/NF shows several characteristic absorptions of imidazole linkers between 400 and 1600 cm −1 . After sulfurization, most of the peaks of Zn/Co‐MOF/NF disappear.…”

Section: Resultsmentioning

confidence: 99%

“…The purple materials become uniformly dark after the sulfurization ( Figure S1 22] The FTIR data ( Figure S3 in the Supporting Information) furtherc onfirm full transformation of Zn/ Co-MOF/NF into Zn-Co-S/NF.T he FTIR spectrum of Zn/Co-MOF/NF shows several characteristic absorptionso fi midazole linkers between4 00 and1 600cm À1 . [23] After sulfurization, most of the peaks of Zn/Co-MOF/NF disappear.T he new peaks at 633 and 1101 cm À1 could be indexed to MÀS( M= Zn or Co) vibrations. [20c, 24] The SEM image (Figure2b) suggests that the leaf-like morphology of pristine Zn/Co-MOF-Pc ollapses (Figure 2b)a fter the sulfurization and consists of aggregated nanoparticles (Figure 2c).…”

Section: Resultsmentioning

confidence: 99%

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A Zinc Cobalt Sulfide Nanosheet Array Derived from a 2D Bimetallic Metal–Organic Frameworks for High‐Performance Supercapacitors

Tao

Han

Cheng

et al. 2018

Chemistry A European J

214

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Porous ternary metal sulfide integrated electrode materials with abundant electroactive sites and redox reactions are very promising for supercapacitors. Herein, a porous zinc cobalt sulfide nanosheet array on Ni foam (Zn-Co-S/NF) was constructed by facile growth of 2D bimetallic zinc/cobalt-based metal-organic framework (Zn/Co-MOF) nanosheets with leaf-like morphology on NF, followed by additional sulfurization. The Zn-Co-S/NF nanosheet array acted directly as a supercapacitor electrode showing much better electrochemical performance (2354.3 F g and 88.6 % retention over 1000 cycles) when compared with zinc cobalt sulfide powder (355.3 F g and 75.8 % retention over 1000 cycles), which originates from good electrical conductivity and mechanical stability, abundant electroactive sites, and facilitated transportation of electrons and electrolyte ions due to the unique nanosheet array structure. An asymmetric supercapacitor (ASC) device assembled from Zn-Co-S/NF and activated carbon electrodes can deliver a highest energy density of 31.9 Wh kg and a maximum power density of 8.5 kW kg . Most importantly, this ASC also shows good cycling stability (71.0 % retention over 10000 cycles). Furthermore, a red LED can be powered by two connected ASCs, and thus as-synthesized Zn-Co-S/NF has great potential for practical applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A Zinc Cobalt Sulfide Nanosheet Array Derived from a 2D Bimetallic Metal–Organic Frameworks for High‐Performance Supercapacitors

Tao

Han

Cheng

et al. 2018

Chemistry A European J

214

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“…Nonetheless, the diffraction pattern attributable to ZnO (32°<2 θ <37°) can clearly be seen in the ZIF‐L and Benz‐ZIF‐L subjected to hydrothermal treatment at 100 °C. This indicates that a portion of the zinc(II) in ZIF‐L and Benz‐ZIF‐L transformed into ZnO during the hydrothermal treatment . Following hydrothermal treatment at 150 °C, the XRD patterns of ZIF‐L and Benz‐ZIF‐L were both dominated by ZnO.…”

Section: Resultsmentioning

confidence: 99%

Surface Engineering Layered Metal–Organic Framework to Enhance Processability and Stability in Water

Chi

Kan

et al. 2017

ChemNanoMat

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Despite considerable advancements of metal–organic frameworks (MOFs), the practical implementation of MOFs is still hindered by issues of stability and processability. In this work, we sought to overcome these difficulties through surface engineering. As a proof of concept, we subjected ZIF‐L with a unique layered crystal morphology to a shell‐ligand exchange reaction. This resulted in the partial replacement of 2‐methylimidazole by benzimidazole as the linker in the framework on the outer surface of the crystals, thereby changing the surface of the ZIF‐L crystal from hydrophilic to hydrophobic. The engineered ZIF‐L (hereafter referred to as Benz‐ZIF‐L) formed a stable dispersion in the nonpolar solvent, hexane. The suspension of Benz‐ZIF‐L in hexane was applied via spin coating to a porous substrate of poly(vinylidene fluoride) (PVDF), resulting in a thin film of high density. In contrast, the application of a suspension of pure ZIF‐L in the same manner did not result in the formation of a thin film. Benz‐ZIF‐L also exceeded pure ZIF‐L with regard to hydrothermal stability and acid/base resistance.

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“…Layered zeolites and other layered clay materials have been widely applied in catalysis and the fabrication of nanocomposites [5][6][7][8][9]. Zeolitic imidazole frameworks (ZIFs) are an emerging class of microporous material, and a layered ZIF, ZIF-L has been recently reported [10][11][12]. Like other microporous materials, layered microporous nanomaterials can be used in molecular separation.…”

Section: Introductionmentioning

confidence: 99%

Highly selective mixed-matrix membranes with layered fillers for molecular separation

Wang¹,

Kang²

2016

Journal of Membrane Science

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Direct conversion of two-dimensional ZIF-L film to porous ZnO nano-sheet film and its performance as photoanode in dye-sensitized solar cell

Cited by 51 publications

References 39 publications

A Zinc Cobalt Sulfide Nanosheet Array Derived from a 2D Bimetallic Metal–Organic Frameworks for High‐Performance Supercapacitors

A Zinc Cobalt Sulfide Nanosheet Array Derived from a 2D Bimetallic Metal–Organic Frameworks for High‐Performance Supercapacitors

Surface Engineering Layered Metal–Organic Framework to Enhance Processability and Stability in Water

Highly selective mixed-matrix membranes with layered fillers for molecular separation

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