Facile synthesis of highly stable and porous Cu2O/CuO cubes with enhanced gas sensing properties

Zhou, Liping; Zou, Yongcun; Zhao, Jun; Wang, Peipei; Feng, Liangliang; Sun, Liwei; Wang, Dejun; Li, Guodong

doi:10.1016/j.snb.2013.07.059

Cited by 102 publications

(42 citation statements)

References 36 publications

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“…The high performances of nanodevices cannot be explained only by their small diameter, and as result of the high surface-to-volume ratio of the CuO NW. The TEM experiments revealed planar defects that could contribute to the sensing properties by enhancing oxygen molecule adsorptions and by an enlargement of the width of hole accumulation layers, which lead to an increase in gas response [8,28,30]. However, this does not explain the fast response and recovery times of a single nanowire nanosensor, which supports the need for extended investigations and will be proposed in a following work.…”

Section: Rapid Research Lettermentioning

confidence: 90%

Single and networked CuO nanowires for highly sensitive p-type semiconductor gas sensor applications

Lupan

Postica

Creţu

et al. 2015

Phys. Status Solidi RRL

103

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Development of high‐performance p‐type semiconductor based gas sensors exhibiting fast‐response/recovery times with ultra‐high response are of major importance for gas sensing applications. Recent reports demonstrated the excellent properties of p‐type semiconducting oxide for various practical applications, especially for selective oxidation of volatile organic compounds (VOCs). In this work, sensors based on CuO nanowire (NW) networks have been successfully fabricated via a simple thermal oxidation process on pre‐patterned Au/Cr pads. Our investigation demonstrates high impact of the process temperature on aspect ratio and density of copper oxide NWs. An optimal temperature for growth of thin and densely packed NWs was found to be at 425 °C. The fabricated sensors demonstrated ultra‐high gas response by a factor of 313 to ethanol vapour (100 ppm) at an operating temperature of 250 °C. High stability and repeatability of these sensors indicate the efficiency of p‐type oxide based gas sensors for selective detection of VOCs. A high‐performance nanodevice was fabricated in a FIB‐SEM system using a single CuO NW, demonstrating an ethanol response of 202 and rapid response and recovery of ∼198 ms at room temperature. The involved gas sensing mechanism of CuO NW networks has been described. We consider that the presented results will be of a great interest for the development of higher‐performance p‐type semiconductor based sensors and bottom‐up nanotechnologies. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

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Section: Rapid Research Lettermentioning

confidence: 90%

Single and networked CuO nanowires for highly sensitive p-type semiconductor gas sensor applications

Lupan

Postica

Creţu

et al. 2015

Phys. Status Solidi RRL

103

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“…By comparing spectra of GA and Cu-GA, the broad peak at 3329 cm −1 , which corresponds to phenolic groups in gallic acid and is due to the stretching vibration of O\ \H, becomes narrow and small. Bands centered at 1600 cm −1 and 1366 cm −1 result from the stretch of COO-in the benzene of GA (Bai et al, 2008;Bai et al, 2010;Zhou et al, 2013). After interaction with Cu, the O\ \H stretching band at 3429 cm −1 , Cu\ \O bending peaks at 493 cm −1 , and bending band of O\ \H in carboxylic groups at 1029 cm −1 disappear, which indicates that all phenolic and carboxylic groups in GA were chelating Cu (Zhou et al, 2013).…”

Section: Characterization and Properties Of Adsorbentsmentioning

confidence: 98%

“…Bands centered at 1600 cm −1 and 1366 cm −1 result from the stretch of COO-in the benzene of GA (Bai et al, 2008;Bai et al, 2010;Zhou et al, 2013). After interaction with Cu, the O\ \H stretching band at 3429 cm −1 , Cu\ \O bending peaks at 493 cm −1 , and bending band of O\ \H in carboxylic groups at 1029 cm −1 disappear, which indicates that all phenolic and carboxylic groups in GA were chelating Cu (Zhou et al, 2013). Correspondingly, the stretching bend of C_O in the spectrum of Cu-GA shifted to a lesser frequency, and two characteristic bands of the carboxylate groups (COO-) between 1300 and 1600 cm −1 appeared.…”

Section: Characterization and Properties Of Adsorbentsmentioning

confidence: 99%

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

Zhao

Tan

et al. 2016

Science of The Total Environment

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• We present an effective catalyst for reductive degradation of organic dyes and phenols in water.• Compared with noble metals, Cu/Cu 2 O/ CuO@C particles are more efficient and less expensive • The porous structure provided a large contact area and channels for the pollutions and active site. , infrared spectroscopy and Raman analysis, revealed that it was composed of graphitized carbon with numerous nanoparticles (100 nm in diameter) of Cu/CuO/Cu 2 O that were uniformly distributed on internal and external surfaces of the carbon support. Gallic acid (GA) has been used as both organic ligand and carbon precursor with metal organic frameworks (MOFs) as the sacrificial template and metal oxide precursor in this green synthesis. The material combined the advantages of MOFs and Cu-containing materials, the porous structure provided a large contact area and channels for the pollutions, which results in more rapid catalytic degradation of pollutants and leads to greater efficiency of catalysis. The material gave excellent catalytic performance for organic dyes and phenols. In this study, Cu/Cu 2 O/CuO@C was used as catalytic to reduce 4-NP, which has been usually adopted as a model reaction to check the catalytic ability. Catalytic experiment results show that 4-NP was degraded approximately 3 min by use of 0.04 mg of catalyst and the conversion of pollutants can reach more than 99%. The catalyst exhibited little change in efficacy after being utilized five times. Rates of degradation of dyes, such as Methylene blue (MB) and Contents lists available at ScienceDirectScience of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n v Rhodamine B (RhB) and phenolic compounds such as O-Nitrophenol (O-NP) and 2-Nitroaniline (2-NA) were all similar.

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“…4. reports [15]. In order to analyze the chemical states of C element, we examined the M a n u s c r i p t 12 / 39 high-resolution XPS spectra of the C 1s region.…”

Section: Xps Analysismentioning

confidence: 99%

“…Till now, various ultraviolet light photocatalysts have been used for removing the pollutants [4]. Nevertheless, the ratio of visible light (about 43% of the solar spectrum) in natural light is much higher than that of ultraviolet light (about 4%) [5,6] [4,13,14], gas sensors [15], biosensors [16,17], solar energy conversion [18] and lithiumion batteries [19].…”

Section: Introductionmentioning

confidence: 99%

Solvothermal fabrication and enhanced visible light photocatalytic activity of Cu2O-reduced graphene oxide composite microspheres for photodegradation of Rhodamine B

Sun

Wang

Hao

et al. 2015

Applied Surface Science

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Facile synthesis of highly stable and porous Cu2O/CuO cubes with enhanced gas sensing properties

Cited by 102 publications

References 36 publications

Single and networked CuO nanowires for highly sensitive p-type semiconductor gas sensor applications

Single and networked CuO nanowires for highly sensitive p-type semiconductor gas sensor applications

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

Solvothermal fabrication and enhanced visible light photocatalytic activity of Cu2O-reduced graphene oxide composite microspheres for photodegradation of Rhodamine B

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