Electrochromic Property of Sol-Gel Derived TiO2 Thin Film for pH Sensor

For this study, TiO2 thin film was fabricated using the sol-gel spin coating method. The fabricated film was then applied as a sensing membrane in an extended gate field effect transistor (EGFET) pH sensor system. The pH sensing performance of the sol-gel spin-coated TiO2 was evaluated in terms of sensitivity, linearity, and hysteresis where the value obtained was 58.70 mV/pH, 0.9922, and 86.17 mV respectively. The drift rate of the sample when being measured for 12 consecutive hours was also determined where measurement in pH 4, pH 7, and pH 10 yield drift rate of 1.72 mV/h, 4.14 mV/h, and 6.05 mV/h respectively. Besides that, the TiO2 was characterized for its thickness (24.32 nm) and surface roughness (5.129 nm). From the results obtained, it was found that sol-gel spin-coated TiO2 thin film with thickness between 20 - 29 nm will have high pH sensitivity (more than 50 mV/pH).

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Detoxification of Aflatoxin B1 in Peanut Oil by Iodine Doped Supported TiO2 Thin Film Under Ultraviolet Light Irradiation

Current Nanoscience ◽

10.2174/1573413714666180621112032 ◽

2018 ◽

Vol 15 (2) ◽

pp. 188-196 ◽

Cited By ~ 2

Author(s):

Chengpeng Xu ◽

Shengying Ye ◽

Xiaolei Cui ◽

Quan Zhang ◽

Yan Liang

Keyword(s):

Thin Film ◽

Photocatalytic Degradation ◽

Aflatoxin B1 ◽

Tio2 Thin Film ◽

Sol Gel ◽

Glass Tube ◽

Iodine Concentration ◽

Peanut Oil ◽

Pseudo First Order Reaction ◽

Supported Tio2

Background: Improper storage and raw materials make peanut oil susceptible to Aflatoxin B1 (AFB1). The semiconductor TiO2 photocatalysis technology is an effective technology which is widely used in sewage treatment, environmental protection and so on. Moreover, the photocatalytic efficiency can be improved by doping I. Method: The experiment is divided into two parts. In the first part, supported TiO2 thin film (STF) was prepared on the quartz glass tube (QGT) by the sol-gel and calcination method and the supported iodine doped supported TiO2 thin film (I-STF) was synthesized using potassium iodate solution. In the second part, the photocatalytic degradation of AFB1 was performed in a self-made photocatalytic reactor. The AFB1 was detected by ELISA kit. Results: The photocatalytic degradation of AFB1 has been proven to follow pseudo first-order reaction kinetics well (R2 > 0.95). The maximum degradation rate of 81.96%, which was reached at the optimum iodine concentration of 0.1mol/L, was 11.38% higher than that with undoped STF. The doping of iodine reduces the band-gap of TiO2, thereby increasing the photocatalytic response range. The proportion of Ti4+ in I-STF has decreased, which means that Ti4+ are replaced by I. The I-STF prepared at iodine concentration of 0.1mol/L has good photocatalytic properties.

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Mo-doped, Cr-Doped, and Mo–Cr codoped TiO2 thin-film photocatalysts by comparative sol-gel spin coating and ion implantation

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.01.136 ◽

2021 ◽

Vol 46 (24) ◽

pp. 12961-12980

Author(s):

Amanda Chen ◽

Wen-Fan Chen ◽

Tina Majidi ◽

Bernadette Pudadera ◽

Armand Atanacio ◽

...

Keyword(s):

Thin Film ◽

Ion Implantation ◽

Spin Coating ◽

Tio2 Thin Film ◽

Sol Gel ◽

Codoped Tio2

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Microstructure Evolution of Ag/TiO2 Thin Film

Magnetochemistry ◽

10.3390/magnetochemistry7010014 ◽

2021 ◽

Vol 7 (1) ◽

pp. 14

Author(s):

Dewi Suriyani Che Halin ◽

Kamrosni Abdul Razak ◽

Mohd Arif Anuar Mohd Salleh ◽

Mohd Izrul Izwan Ramli ◽

Mohd Mustafa Al Bakri Abdullah ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Growth Rate ◽

Synchrotron Radiation ◽

Tio2 Thin Film ◽

Sol Gel ◽

Tio2 Thin Films ◽

Contact Mode ◽

X Ray ◽

Radiation Imaging

Ag/TiO2 thin films were prepared using the sol-gel spin coating method. The microstructural growth behaviors of the prepared Ag/TiO2 thin films were elucidated using real-time synchrotron radiation imaging, its structure was determined using grazing incidence X-ray diffraction (GIXRD), its morphology was imaged using the field emission scanning electron microscopy (FESEM), and its surface topography was examined using the atomic force microscope (AFM) in contact mode. The cubical shape was detected and identified as Ag, while the anatase, TiO2 thin film resembled a porous ring-like structure. It was found that each ring that coalesced and formed channels occurred at a low annealing temperature of 280 °C. The energy dispersive X-ray (EDX) result revealed a small amount of Ag presence in the Ag/TiO2 thin films. From the in-situ synchrotron radiation imaging, it was observed that as the annealing time increased, the growth of Ag/TiO2 also increased in terms of area and the number of junctions. The growth rate of Ag/TiO2 at 600 s was 47.26 µm2/s, and after 1200 s it decreased to 11.50 µm2/s and 11.55 µm2/s at 1800 s. Prolonged annealing will further decrease the growth rate to 5.94 µm2/s, 4.12 µm2/s and 4.86 µm2/s at 2400 s, 3000 s and 3600 s, respectively.

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