Recyclable non-metal surface-enhanced Raman scattering substrate based on graphene oxide/ZIF-67 nanocomposites

Wang, Shuang; Zhang, Xiaoya; Xiang, Qun; Zhou, Shu; Zheng, Jianbin; Yan, Rusen; Gao, Gui-Qi

doi:10.1039/d3nj02081a

Cited by 3 publications

(3 citation statements)

References 37 publications

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“…To further confirm the formation of CoNi-LDH, the Raman scattering spectra of Co-MOF@MX-CNF and CoNi-LDH@MX-CNF are shown in Figure b . In addition to the peak at 258 cm –1 associated with MXene, new peaks have emerged at 219 cm –1 , 334 cm –1 , 380 cm –1 , and 683 cm –1 corresponding to the vibrational mode of the 2-methylimidazolate ligand and the Co–N bond. − This substantiates the successful synthesis of Co-MOF on MX-CNF. After the etching-deposition-growth process, the Raman peaks of the Co-MOF@MX-CNF precursor disappeared, and CoNi-LDH@MX-CNF exhibits a broad peak of the Ni-O/Co-O symmetric stretching mode at 525 cm –1 . , The characteristic peaks of the Co-MOF precursor are conspicuously absent in the Raman spectra of the resultant CoNi-LDH@MX-CNF, implying complete conversion of Co-MOF.…”

Section: Resultsmentioning

confidence: 57%

Cobalt–Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes

Jiang,

Cheng,

et al. 2023

ACS Omega

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Flexible electrodes for energy storage and conversion require a micro-nanomorphology and stable structure. Herein, MXene fibers (MX-CNF) are fabricated by electrospinning, and Co-MOF nanoarrays are prepared on the fibers to form Co-MOF@MX-CNF. Hydrolysis and etching of Co-MOF@MX-CNF in the Ni 2+ solution produce cobalt–nickel layered double hydroxide (CoNi-LDH). The CoNi-LDH nanoarrays on the MX-CNF substrate have a large specific surface area and abundant electrochemical active sites, thus ensuring effective exposure of the CoNi-LDH active materials to the electrolyte and efficient pseudocapacitive energy storage and fast reversible redox kinetics for enhanced charging–discharging characteristics. The CoNi-LDH@MX-CNF electrode exhibits a discharge capacity of 996 F g –1 at a current density of 1 A g –1 as well as 78.62% capacitance retention after 3,000 cycles at 10 A g –1 . The asymmetric supercapacitor (ASC) comprising the CoNi-LDH@MX-CNF positive electrode and negative activated carbon electrode shows an energy density of 48.4 Wh kg –1 at a power density of 499 W kg –1 and a capacity retention of 78.9% after 3,000 cycles at a current density of 10 A g –1 . Density-functional theory calculations reveal the charge density difference and partial density of states of CoNi-LDH@MX-CNF confirming the large potential of the CoNi-LDH@MX-CNF electrode in energy storage applications.

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Section: Resultsmentioning

confidence: 57%

Cobalt–Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes

Jiang,

Cheng,

et al. 2023

ACS Omega

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“…The peak found at 954 cm –1 is attributed to the out-of-plane bending mode of the C–H bond, and the peaks found at 1147 and 1178 cm –1 are due to the stretching mode of the C–N bond. The imidazole ring expansion, bending modes of the methyl group, deformation of the C–H bond, and stretching modes of CC are found at 1305 and 1384 cm –1 , 1459 and 1503 cm –1 , respectively, in the Raman spectra. , …”

Section: Resultsmentioning

confidence: 92%

“…The imidazole ring expansion, bending modes of the methyl group, deformation of the C−H bond, and stretching modes of C�C are found at 1305 and 1384 cm −1 , 1459 and 1503 cm −1 , respectively, in the Raman spectra. 56,57 Electrical Characterization of TENG. Figure 3(a) shows the TENG device structure consisting of ZIF-67 as a positive triboelectriclayer, FEP as a negative triboelectric layer, and aluminum acts as a top and bottom electrodes.…”

Section: ■ Introductionmentioning

confidence: 99%

Facile Direct Growth of ZIF-67 Metal–Organic Framework for Triboelectric Nanogenerators and Their Application in the Internet of Vehicles

Babu,

Bochu,

Potu

et al. 2023

ACS Sustainable Chem. Eng.

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Metal−organic framework (MOF) materials have become a potential candidate in the field of triboelectric nanogenerators (TENGs). However, the direct utilization of MOFs in TENG device technology is still a relatively obscured area, with only a limited number of reports addressing this topic. Instead, most of the existing literature investigated composite materials that combine MOFs with polymers or binder materials for TENG fabrication. However, this method does not accurately reveal the actual triboelectric properties of MOFs. Consequently, the direct growth of MOFs on conducting substrates poses a significant challenge in realizing the potential of MOFs in TENG devices. This report addresses this gap by employing a simple, cost-effective hydrothermal method for directly growing ZIF-67 on an aluminum (Al) substrate. The utilization of a ZIF-67-based TENG has yielded impressive results, achieving a noteworthy maximum power density of 2.35 W/ m 2 . This TENG has demonstrated practical applications by effectively integrating into intelligent parking systems and providing power to portable electronic devices. Furthermore, the approach employed in this study can be extended to other MOFs which can be directly synthesized on flexible conducting substrates. This research opens up new possibilities for exploring the inherent triboelectric properties of MOFs and their placement within a triboelectric series.

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Facile synthesis of Co3O4@N-pc/PEDOT composites for supercapacitor electrode

Li,

Zhou,

Xiao

et al. 2024

Journal of Alloys and Compounds

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Recyclable non-metal surface-enhanced Raman scattering substrate based on graphene oxide/ZIF-67 nanocomposites

Abstract: The design and synthesis of a highly sensitive non-metal surface-enhanced Raman scattering (SERS) substrate with an excellent reusable property are of significant interest because of its vast prospective application in...

Cited by 3 publications

References 37 publications

Cobalt–Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes

Cobalt–Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes

Facile Direct Growth of ZIF-67 Metal–Organic Framework for Triboelectric Nanogenerators and Their Application in the Internet of Vehicles

Facile synthesis of Co3O4@N-pc/PEDOT composites for supercapacitor electrode

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