<abstract xmlns="http://www.w3.org/1999/xhtml">Nanocrystalline ZnO-TiO2 (with molar ratios 9:1, 7:3, 1:1, 3:7 and 1:9) were successfully synthesized by hydrothermal method. Synthesized materials were examined with the help of X-ray diffraction and transmission electron microscope. Liquid petroleum gas sensing characteristics of the ZnO-TiO2 films were investigated at different operating temperatures. The ZnO-TiO2 thick film (with 1:1 molar ratio) exhibited good response toward liquid petroleum gas as compared to other investigated compositions. Further, liquid petroleum gas sensing characteristics of CuO modified ZnO-TiO2 thick films were investigated. 0.2 M CuO modified ZnO-TiO2 thick film exhibited excellent liquid petroleum gas sensing characteristics such as higher response (~ 1637.49 at 185 °C) with quick response time (~30 s), low recovery time (~70 s), excellent repeatability and stability at low operating temperature.</abstract>

Nanocrystalline ZnO-TiO2 (with molar ratios 9:1, 7:3, 1:1, 3:7 and 1:9) were successfully synthesized by hydrothermal method. Synthesized materials were examined with the help of X-ray diffraction and transmission electron microscope. Liquid petroleum gas sensing characteristics of the ZnO-TiO2 films were investigated at different operating temperatures. The ZnO-TiO2 thick film (with 1:1 molar ratio) exhibited good response toward liquid petroleum gas as compared to other investigated compositions. Further, liquid petroleum gas sensing characteristics of CuO modified ZnO-TiO2 thick films were investigated. 0.2 M CuO modified ZnO-TiO2 thick film exhibited excellent liquid petroleum gas sensing characteristics such as higher response (~ 1637.49 at 185 °C) with quick response time (~30 s), low recovery time (~70 s), excellent repeatability and stability at low operating temperature.

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO2

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO

Nanocrystalline ZnO-TiO2 (with molar ratios 9:1, 7:3, 1:1, 3:7 and 1:9) were successfully synthesized by hydrothermal method. Synthesized materials were...

ZnO-TiO₂ thick film (molar ratio 1:1)	Activation energy E_a (eV)

	E_a(I) 30 °C - 130 °C	E_a (II) 175 °C - 225 °C
Unmodified	0.378	0.201
0.1 M CuO modified	0.237	0.737
0.2 M CuO modified	0.240	0.861
0.3 M CuO modified	0.234	0.625

Element wt.%	0.1 M CuO		0.2 M CuO		0.3 M CuO		ZnO-TiO₂ (molar ratio 1:1)
Element wt.%	Norm. wt.%	Atom. at.%	Norm. wt.%	Atom. at.%	Norm. wt.%	Atom. at.%	Norm. wt.%	Atom. at.%
O	29.62	60.61	24.53	54.17	21.81	50.57	32.58	63.30
Zn	1.09	0.54	1.24	0.67	1.05	0.60	40.66	19.33
Ti	21.67	14.74	21.31	15.73	19.92	15.43	26.76	17.37
Cu	47.62	24.41	52.92	29.43	57.22	33.40	Nil	Nil

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO₂

Article Category: Research Article

Pubblicato online: 28 set 2016

Pagine: 571 - 581

Ricevuto: 17 nov 2015

Accettato: 03 lug 2016

DOI: https://doi.org/10.1515/msp-2016-0083

Parole chiave
ZnO-TiO, nanocrystalline material, gas sensor, CuO

© 2016 R.B. Pedhekar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

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Fig. 11

Activation energy of 0.1 M, 0.2 M, 0.3 M CuO modified and unmodified ZnO-TiO2 thick film (molar ratio 1:1) in air ambient.

Composition of 0.1 M, 0.2 M and 0.3 M CuO modified and unmodified ZnO-TiO2 thick film (molar ratio 1:1).

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO2

Article Category: Research Article

Pubblicato online: 28 set 2016

Pagine: 571 - 581

Ricevuto: 17 nov 2015

Accettato: 03 lug 2016

DOI: https://doi.org/10.1515/msp-2016-0083

Parole chiaveZnO-TiO, nanocrystalline material, gas sensor, CuO

© 2016 R.B. Pedhekar et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Fig. 10

Fig. 11

Activation energy of 0.1 M, 0.2 M, 0.3 M CuO modified and unmodified ZnO-TiO2 thick film (molar ratio 1:1) in air ambient.

Composition of 0.1 M, 0.2 M and 0.3 M CuO modified and unmodified ZnO-TiO2 thick film (molar ratio 1:1).

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO₂

Parole chiave
ZnO-TiO, nanocrystalline material, gas sensor, CuO