A high sensitive and low detection limit of formaldehyde gas sensor based on hierarchical flower-like CuO nanostructure fabricated by sol–gel method

Deng, Heng; Li, Hairong; Wang, Fang; Yuan, Chao-xin; Liu, Su; Wang, Peng; Xie, Long-zhen; Sun, Ya‐Ping; Chang, Fangzhi

doi:10.1007/s10854-016-4626-y

Cited by 29 publications

(11 citation statements)

References 29 publications

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“…For instance, hierarchical 3D TiO 2 nanoflowers [ 51 ] showed enhanced properties towards acetone at room temperature with respect to TiO 2 nanoparticles [ 77 ]. The use of hierarchical flower-like CuO nanostructures is another example of complex 3D-shaped MOX [ 74 ], which has reported excellent results towards ethanol, formaldehyde, acetone, and xylene for concentrations as low as 20 ppb and yet with fast response (11.2 s) and short recovery time (8.4 s). Novel MOXs based on highly porous Co 3 O 4 concave nanocubes with high surface area (120.9 m 2 g −1 ) have also proven fast response and recovery time below 10 s to 10 ppm of ethanol [ 69 ].…”

Section: Tailoring Materials For Enhanced Sensing Properties To Vomentioning

confidence: 99%

“…However, this material shows the potential to discriminate either ethanol or acetone in the presence of various aromatic compounds (e.g., benzene, toluene, and xylene) and formaldehyde. In contrast, hierarchical flower-like CuO nanostructures [ 74 ] have shown high ethanol responses, though with high interferences to acetone, xylene, and formaldehyde. CbMs such as MWCNTs decorated with Au also showed a good response to ethanol with possible interference from benzene [ 55 ].…”

Section: Selectivity—in Search Of Specificitymentioning

confidence: 99%

“…Table 8 and Table 9 evidence this fact, indicating a preference for developing VOCs sensitive materials by wet chemical synthesis (WCS) and their subsequent transfer (or re-deposit) over the transducing platforms. The preferred WCS methods for VOCs sensitive MOXs, POMs, or CbMS include sonochemical process [ 39 , 40 ], hydrothermal process [ 36 , 46 , 47 , 50 , 51 , 52 , 73 , 102 ], one-pot wet-chemical method [ 37 ], photodeposition [ 65 ], sol-gel method [ 74 ], microwave-assisted approach [ 45 , 112 , 116 ], precipitation [ 69 , 70 , 105 , 122 ], calcination of precursors [ 119 ], seed mediated growth method [ 66 ], pyrolysis [ 121 ], spray deposition [ 116 ], Langmuir–Blodgett method [ 123 ], chemical bath deposition [ 111 ], electrochemical methods, and chemical oxidation polymerization [ 58 ]. The transfer methods are generally based on the formation of pastes or suspended solutions using common solvents (e.g., ethanol, terpineol) for their subsequent printing or drop coating.…”

Section: Enabling the Materials Properties For Their Practical Usementioning

confidence: 99%

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VOCs Sensing by Metal Oxides, Conductive Polymers, and Carbon-Based Materials

et al. 2021

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This review summarizes the recent research efforts and developments in nanomaterials for sensing volatile organic compounds (VOCs). The discussion focuses on key materials such as metal oxides (e.g., ZnO, SnO2, TiO2 WO3), conductive polymers (e.g., polypyrrole, polythiophene, poly(3,4-ethylenedioxythiophene)), and carbon-based materials (e.g., graphene, graphene oxide, carbon nanotubes), and their mutual combination due to their representativeness in VOCs sensing. Moreover, it delves into the main characteristics and tuning of these materials to achieve enhanced functionality (sensitivity, selectivity, speed of response, and stability). The usual synthesis methods and their advantages towards their integration with microsystems for practical applications are also remarked on. The literature survey shows the most successful systems include structured morphologies, particularly hierarchical structures at the nanometric scale, with intentionally introduced tunable “decorative impurities” or well-defined interfaces forming bilayer structures. These groups of modified or functionalized structures, in which metal oxides are still the main protagonists either as host or guest elements, have proved improvements in VOCs sensing. The work also identifies the need to explore new hybrid material combinations, as well as the convenience of incorporating other transducing principles further than resistive that allow the exploitation of mixed output concepts (e.g., electric, optic, mechanic).

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Section: Tailoring Materials For Enhanced Sensing Properties To Vomentioning

confidence: 99%

Section: Selectivity—in Search Of Specificitymentioning

confidence: 99%

Section: Enabling the Materials Properties For Their Practical Usementioning

confidence: 99%

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VOCs Sensing by Metal Oxides, Conductive Polymers, and Carbon-Based Materials

et al. 2021

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“…The thin film based copper oxide (CuO) has been used in many electronic and optoelectronic devices such as thin-film transistors, cross-point memories, gas sensors, and lithium-ion batteries [2] over recent decades. The main advantages of this oxide include low production cost, thermal stability, nontoxicity, and relatively high optical absorption [3]. CuO is a degenerate p-type II-VI semiconductor possessing special features such as high electrical conductivity (even without doping), high optical transmittance, exceptional luminescence characteristics, and an optical energy band gap of 2.13 eV [4].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Fabricated CuO Thin Film: Characterization for Device Application

Maini¹,

Shah²

2021

J. Nano- Electron. Phys.

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“…There are many examples of porous materials including: porous glasses 17 , aerogels 18 , materials formed by a template assembly 19 , metal-organic frameworks 20,21 and “flower-like” structures 22 . To date, the most of “flower-like” structures are mainly derived from metal oxides, for instance copper 23–26 or zinc oxides 22,27–29 .…”

Section: Introductionmentioning

confidence: 99%

Porous flower-like superstructures based on self-assembled colloidal quantum dots for sensing

Stepanidenko

Gromova

Kormilina

et al. 2019

Sci Rep

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Quantum dots (QDs) have been envisaged as very promising materials for the development of advanced optical sensors. Here we report a new highly porous luminescent material based on colloidal QDs for potential applications in optical sensing devices. Bulk flower-like porous structures with sizes of hundreds of microns have been produced by slow destabilization of QD solution in the presence of a non-solvent vapor. The porous highly luminescent material was formed from CdSe QDs using the approach of non-solvent destabilization. This material demonstrated a 4-fold decrease in PL signal in the presence of the ammonia vapor. The relationship between the destabilization rate of QDs in solution and the resulting morphology of structural elements has been established. The proposed model of bulk porous flower-like nanostructured material fabrication can be applied to nanoparticles of different nature combining their unique properties. This research opens up a new approach to design novel multi-component composite materials enabling potential performance improvements of various photonic devices.

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A high sensitive and low detection limit of formaldehyde gas sensor based on hierarchical flower-like CuO nanostructure fabricated by sol–gel method

Cited by 29 publications

References 29 publications

VOCs Sensing by Metal Oxides, Conductive Polymers, and Carbon-Based Materials

VOCs Sensing by Metal Oxides, Conductive Polymers, and Carbon-Based Materials

Sol-Gel Fabricated CuO Thin Film: Characterization for Device Application

Porous flower-like superstructures based on self-assembled colloidal quantum dots for sensing

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