Heterocontact type CuO-modified SnO2 sensor for the detection of a ppm level H2S gas at room temperature

Patil, L.A.; Patil, D. R.

doi:10.1016/j.snb.2006.02.022

Cited by 175 publications

(77 citation statements)

References 34 publications

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“…The fine powder was calcined at 1100˚C for 24 h in air and re-ground. The thixotropic paste was formulated as explained elsewhere [16,17]. The ratio of inorganic to organic part was kept as 75: 25 in formulating the paste.…”

Section: Powder and Paste Preparationmentioning

confidence: 99%

Room Temperature Ammonia Gas Sensing Using MnO<sub>2</sub>-Modified ZnO Thick Film Resistors

Patil¹,

Sonawane²,

Patil³

2011

JMP

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Pure ZnO thick film, prepared by screen-printing technique, was almost insensitive to NH 3 . Pure ZnO thick films were surface modified with MnO 2 by dipping them into 0.01 M aqueous solution of manganese chloride (MnCl 2 ) for different intervals of time and fired at 500˚C for 12 h. The grains of MnO 2 would disperse around the grains of ZnO base material. The MnO 2 modified ZnO films dipped for 30 min were observed to be sensitive and highly selective to NH 3 gas at room temperature. An exceptional sensitivity was found to low concentration (50 ppm) of NH 3 gas at room temperature and no cross sensitivity was observed even to high concentrations of other hazardous and polluting gases. The effects of surface microstructure and MnO 2 concentrations on the sensitivity, selectivity, response and recovery of the sensor in the presence of NH 3 and other gases were studied and discussed. The better performance could be attributed to an optimum number of surface misfits in terms of MnO 2 on the ZnO films.

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Section: Powder and Paste Preparationmentioning

confidence: 99%

Room Temperature Ammonia Gas Sensing Using MnO<sub>2</sub>-Modified ZnO Thick Film Resistors

Patil¹,

Sonawane²,

Patil³

2011

JMP

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“…The initial high resistance of CuO(x)/SnO 2 samples (>10 9 Ω) may be derived from n-SnO 2 /p-CuO heterojunctions between the supported p-type CuO grains and the n-type SnO 2 grains. (15) Upon exposure to H 2 gas in TPR&R measurement, the barrier height of n-SnO 2 /p-CuO heterojunctions decreases markedly because of the partial reduction of p-CuO to CuO 1−x , probably leading to a marked decrease in resistance. Therefore, peak I can be assigned to the reduction of CuO.…”

Section: Assignments Of Reduction Peaks In Tpr Profiles Of Sno 2 -Supmentioning

confidence: 99%

Investigation on Reduction Behaviors of SnO2 and SnO2-Supported CuO Sensor Materials by Temperature-Programmed Reduction Method Combined with Resistance Measurement

2016

Sensors and Materials

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“…41-1445) [12]. In addition, the interplanar spacing was estimated to be 0.232 nm, which corresponds to the (111) plane of a monoclinic CuO crystal [13].…”

Section: Photodecolorization Experimentsmentioning

confidence: 99%

Effective Decolorization of Azo Dye Utilizing SnO₂/CuO/Polymer Films under Simulated Solar Light Irradiation

et al. 2010

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SnO 2 /CuO/polymer flexible thin films were prepared by a solution casting technology and characterized by high-resolution TEM and XRD. The influences of key operational parameters on photocatalytic decolorization of azo dye (Biebrich Scarlet Red, BSR) were investigated systematically. The results showed good crystalline and clear lattice spacings of the novel composite photocatalyst. BSR was bleached effectively and the decolorization efficiency was >98 % in the presence of 1.0 g L -1 photocatalyst under simulated solar light irradiation. The decolorization was more effective in acidic solution with the optimal pH in the range of 4-6. The tested co-anions in general decreased the decolorization rates by decreasing the adsorption of BSR on the surface of the photocatalyst and reacting with positive hole (h + )/hydroxyl radicals (HO·).

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Heterocontact type CuO-modified SnO2 sensor for the detection of a ppm level H2S gas at room temperature

Cited by 175 publications

References 34 publications

Room Temperature Ammonia Gas Sensing Using MnO<sub>2</sub>-Modified ZnO Thick Film Resistors

Room Temperature Ammonia Gas Sensing Using MnO<sub>2</sub>-Modified ZnO Thick Film Resistors

Investigation on Reduction Behaviors of SnO2 and SnO2-Supported CuO Sensor Materials by Temperature-Programmed Reduction Method Combined with Resistance Measurement

Effective Decolorization of Azo Dye Utilizing SnO₂/CuO/Polymer Films under Simulated Solar Light Irradiation

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Heterocontact type CuO-modified SnO2 sensor for the detection of a ppm level H2S gas at room temperature

Cited by 175 publications

References 34 publications

Room Temperature Ammonia Gas Sensing Using MnO&lt;sub&gt;2&lt;/sub&gt;-Modified ZnO Thick Film Resistors

Room Temperature Ammonia Gas Sensing Using MnO&lt;sub&gt;2&lt;/sub&gt;-Modified ZnO Thick Film Resistors

Investigation on Reduction Behaviors of SnO2 and SnO2-Supported CuO Sensor Materials by Temperature-Programmed Reduction Method Combined with Resistance Measurement

Effective Decolorization of Azo Dye Utilizing SnO2/CuO/Polymer Films under Simulated Solar Light Irradiation

Contact Info

Product

Resources

About

Room Temperature Ammonia Gas Sensing Using MnO<sub>2</sub>-Modified ZnO Thick Film Resistors

Room Temperature Ammonia Gas Sensing Using MnO<sub>2</sub>-Modified ZnO Thick Film Resistors

Effective Decolorization of Azo Dye Utilizing SnO₂/CuO/Polymer Films under Simulated Solar Light Irradiation