NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION
Аутори
Savic, SlavicaVojisavljević, Katarina
Počuča-Nešić, Milica
Knezevic, Nikola
Djokic, Veljko
Ribić, Vesna
Branković, Goran
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the
nanocasting process using hydrothermally obtained KIT-5 as a hard template.
In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later
evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination
and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder
(P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio
P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique
onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying
regime and finally calcined at 550 °C for 5 h.
The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD)
spectroscopy, Brunauer–E...mmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross
section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron
Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated
in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex
impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI
3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz.
Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore
diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even
though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of
agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial
degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The
impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times,
while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when
it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at
40% RH and at room temperature showing its promising capacity as a humidity sensor.
Кључне речи:
nanocasting / tin oxide / humidity sensorИзвор:
XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY, 2019, 119-ABS 201Издавач:
- Societa ceramica italiana
- Politecnico di Torino
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200053 (Универзитет у Београду, Институт за мултидисциплинарна истраживања) (RS-MESTD-inst-2020-200053)
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Savic, Slavica AU - Vojisavljević, Katarina AU - Počuča-Nešić, Milica AU - Knezevic, Nikola AU - Djokic, Veljko AU - Ribić, Vesna AU - Branković, Goran PY - 2019 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2584 AB - This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the nanocasting process using hydrothermally obtained KIT-5 as a hard template. In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder (P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying regime and finally calcined at 550 °C for 5 h. The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD) spectroscopy, Brunauer–Emmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI 3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz. Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times, while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at 40% RH and at room temperature showing its promising capacity as a humidity sensor. PB - Societa ceramica italiana PB - Politecnico di Torino C3 - XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY T1 - NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION IS - 119-ABS 201 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2584 ER -
@conference{ author = "Savic, Slavica and Vojisavljević, Katarina and Počuča-Nešić, Milica and Knezevic, Nikola and Djokic, Veljko and Ribić, Vesna and Branković, Goran", year = "2019", abstract = "This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the nanocasting process using hydrothermally obtained KIT-5 as a hard template. In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder (P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying regime and finally calcined at 550 °C for 5 h. The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD) spectroscopy, Brunauer–Emmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI 3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz. Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times, while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at 40% RH and at room temperature showing its promising capacity as a humidity sensor.", publisher = "Societa ceramica italiana, Politecnico di Torino", journal = "XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY", title = "NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION", number = "119-ABS 201", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2584" }
Savic, S., Vojisavljević, K., Počuča-Nešić, M., Knezevic, N., Djokic, V., Ribić, V.,& Branković, G.. (2019). NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION. in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY Societa ceramica italiana.(119-ABS 201). https://hdl.handle.net/21.15107/rcub_rimsi_2584
Savic S, Vojisavljević K, Počuča-Nešić M, Knezevic N, Djokic V, Ribić V, Branković G. NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION. in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY. 2019;(119-ABS 201). https://hdl.handle.net/21.15107/rcub_rimsi_2584 .
Savic, Slavica, Vojisavljević, Katarina, Počuča-Nešić, Milica, Knezevic, Nikola, Djokic, Veljko, Ribić, Vesna, Branković, Goran, "NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION" in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY, no. 119-ABS 201 (2019), https://hdl.handle.net/21.15107/rcub_rimsi_2584 .