Copper oxide hierarchical morphology derived from MOF precursors for enhancing ethanol vapor sensing performance

Wang, Sha; Gao, Zhimin; Song, Guoshuai; Yu, Yantao; He, Wenxiu; Li, Linlin; Wang, Tieqiang; Fan, Fuqiang; Li, Yunong; Zhang, Liying; Zhang, Xuemin; Fu, Yu; Qi, Wei

doi:10.1039/d0tc01425g

Cited by 33 publications

(27 citation statements)

References 47 publications

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“…42 The weight loss in 230−420 °C is due to the decomposition of MOF to metal oxides. 30 The residual weight of Zn/Ni-MOF (19.5%) is lower than the residual weight of Zn-MOF at 400 °C because the relative atomic mass of nickel is lower than that of zinc, resulting in the weight of the remaining ZnO/NiO being lower than ZnO. This result also confirms that Ni ions replace the Zn sites rather than simply adsorbing on the surface of Zn-MOF during ion exchange.…”

Section: Methodsmentioning

confidence: 65%

“…20−24 Compared with other methods to prepare an MOS heterostructure such as coprecipitation, 25 sol−gel method, 26,27 solvothermal method, 28 and electrochemical deposition, 29 the MOS heterostructure derived from a Bi-MOF precursor tend to inherit the merits of the pristine Bi-MOF such as the large special surface area, diverse chemical composition, and favorable catalytic active sites. 30,31 Crucially, the resulting MOS possesses a high gasaccessible nanostructure without severe aggregation and structural collapse, which is significant to increase the sensing performance because it provides a fast and convenient access for small molecules during the transformation process. 32 work, which exhibits excellent selectivity and good stability for formaldehyde.…”

Section: Introductionmentioning

confidence: 99%

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Construction of Zn/Ni Bimetallic Organic Framework Derived ZnO/NiO Heterostructure with Superior N-Propanol Sensing Performance

Zhao

Wang

Zhai

et al. 2021

ACS Appl. Mater. Interfaces

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Bimetallic organic frameworks (Bi-MOFs) have been recognized as one of the most ideal precursors to construct metal oxide semiconductor (MOS) composites, owing to their high surface area, various chemical structures, and easy removal of the sacrificial MOF scaffolds through calcination. Herein, we synthesized Zn/Ni Bi-MOF for the first time via a facile ion exchange postsynthetic strategy, formed a three-dimensional framework consisting of infinite one-dimensional chains that is unattainable through the direct solvothermal approach, and then transformed the Zn/Ni Bi-MOF into a unique ZnO/NiO heterostructure through calcination. Notably, the obtained sensor based on a ZnO/NiO heterostructure exhibits an ultrahigh response of 280.2 toward 500 ppm n-propanol at 275 °C (17.2fold enhancement compared with that of ZnO), remarkable selectivity, and a limit of detection of 200 ppb with a notable response (2.51), which outperforms state-of-the-art n-propanol sensors. The enhanced n-propanol sensing properties may be attributed to the synergistic effects of several points including the heterojunction at the interface between the NiO and ZnO nanoparticles, especially a one-dimensional chain MOF template structure as well as the chemical sensitization effect of NiO. This work provides a promising strategy for the development of a novel Bi-MOF-derived MOS heterostructure or homostructure with well-defined morphology and composition that can be applied to the fields of gas sensing, energy storage, and catalysis.

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Section: Methodsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Construction of Zn/Ni Bimetallic Organic Framework Derived ZnO/NiO Heterostructure with Superior N-Propanol Sensing Performance

Zhao

Wang

Zhai

et al. 2021

ACS Appl. Mater. Interfaces

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“…With band gaps of 1.34–1.7 eV and a high absorption coefficient, CuO, a p-type IMO, could be one of the promising candidates for photovoltaic applications. , CuO has some other excellent features like high minority carrier diffusion length, tunable electrical properties, etc. These features of CuO have enabled its use in the sensor, − photoelectrochemical cell, − capacitive device, − and photovoltaic ,− applications. According to the Shockley–Queisser limit, ∼30% power conversion efficiency (PCE) could be obtained from the single-junction CuO-based solar cells …”

Section: Introductionmentioning

confidence: 99%

Role of a Solution-Processed V₂O₅ Hole Extracting Layer on the Performance of CuO-ZnO-Based Solar Cells

2021

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In this research, a heterostructure of the CuO-ZnO-based solar cells has been fabricated using low-cost, earth-abundant, non-toxic metal oxides by a low-cost, low-temperature spin coating technique. The device based on CuO-ZnO without a hole transport layer (HTL) suffers from poor power conversion efficiency due to carrier recombination on the surface of CuO and bad ohmic contact between the metal electrode and the CuO absorber layer. The main focus of this research is to minimize the mentioned shortcomings by a novel idea of introducing a solution-processed vanadium pentoxide (V 2 O 5 ) HTL in the heterostructure of the CuO-ZnO-based solar cells. A simple and low-cost spin coating technique has been investigated to deposit V 2 O 5 onto the absorber layer of the solar cell. The influence of the V 2 O 5 HTL on the performance of CuO-ZnO-based solar cells has been investigated. The photovoltaic parameters of the CuO-ZnO-based solar cells were dramatically enhanced after insertion of the V 2 O 5 HTL. V 2 O 5 was found to enhance the open-circuit voltage of the CuO-ZnO-based solar cells up to 231 mV. A detailed study on the effect of defect properties of the CuO absorber layer on the device performance was theoretically accomplished to provide future guidelines for the performance enhancement of the CuO-ZnO-based solar cells. The experimental results indicate that solution-processed V 2 O 5 could be a promising HTL for the low-cost, environment-friendly CuO-ZnO-based solar cells.

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“…[3] The rod-like CuO showed better ethanol vapor sensing performance than cube CuO. [4] Compared with the shuttle-like and rod-like Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 , the olive-like Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 with suitable size presented much superior electrochemical properties as cathode materials in Li-ion batteries. [5] Moreover, the crystal structure and phase of the materials can also affect their original properties.…”

Section: Introductionmentioning

confidence: 99%

Phase‐Controllable Synthesis of Multifunctional 1T‐MoSe₂ Nanostructures: Applications in Lithium‐Ion Batteries, Electrocatalytic Hydrogen Evolution, and the Hydrogenation Reaction

et al. 2021

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As an important regulatory method, the phase engineering strategy is widely used to develop functional materials with desired properties. Herein, we combine a solvothermal method with post-annealing treatment to controllably synthesize multifunctional MoSe 2 flower-like nanostructures (FNSs) in different crystal phases. Based on the different phases of MoSe 2 FNSs, we systematically investigate their performance in lithium-ion storage, the hydrogen evolution reaction (HER), and the hydrogenation of nitrophenol. The results show that 1T-MoSe 2 FNSs possess superior performance in lithium-ion batteries, HER, and hydrogenation of PNP compared with 2H-MoSe 2 FNSs. Moreover, density functional theory calculations reveal that 1T-MoSe 2 FNSs exhibits a higher chemisorption energy than that of 2H-MoSe 2 FNSs, which is beneficial for the improvement of the lithium-ion storage capacity. This work provides an effective way to develop functional materials based on phase engineering.

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Copper oxide hierarchical morphology derived from MOF precursors for enhancing ethanol vapor sensing performance

Abstract: The structure–function relationship of CuO hierarchical morphologies in gas sensing has been revealed.

Cited by 33 publications

References 47 publications

Construction of Zn/Ni Bimetallic Organic Framework Derived ZnO/NiO Heterostructure with Superior N-Propanol Sensing Performance

Construction of Zn/Ni Bimetallic Organic Framework Derived ZnO/NiO Heterostructure with Superior N-Propanol Sensing Performance

Role of a Solution-Processed V₂O₅ Hole Extracting Layer on the Performance of CuO-ZnO-Based Solar Cells

Phase‐Controllable Synthesis of Multifunctional 1T‐MoSe₂ Nanostructures: Applications in Lithium‐Ion Batteries, Electrocatalytic Hydrogen Evolution, and the Hydrogenation Reaction

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Copper oxide hierarchical morphology derived from MOF precursors for enhancing ethanol vapor sensing performance

Abstract: The structure–function relationship of CuO hierarchical morphologies in gas sensing has been revealed.

Cited by 33 publications

References 47 publications

Construction of Zn/Ni Bimetallic Organic Framework Derived ZnO/NiO Heterostructure with Superior N-Propanol Sensing Performance

Construction of Zn/Ni Bimetallic Organic Framework Derived ZnO/NiO Heterostructure with Superior N-Propanol Sensing Performance

Role of a Solution-Processed V2O5 Hole Extracting Layer on the Performance of CuO-ZnO-Based Solar Cells

Phase‐Controllable Synthesis of Multifunctional 1T‐MoSe2 Nanostructures: Applications in Lithium‐Ion Batteries, Electrocatalytic Hydrogen Evolution, and the Hydrogenation Reaction

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Role of a Solution-Processed V₂O₅ Hole Extracting Layer on the Performance of CuO-ZnO-Based Solar Cells

Phase‐Controllable Synthesis of Multifunctional 1T‐MoSe₂ Nanostructures: Applications in Lithium‐Ion Batteries, Electrocatalytic Hydrogen Evolution, and the Hydrogenation Reaction