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

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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Solar photocatalytic degradation of gaseous formaldehyde by sol–gel TiO2 thin film for enhancement of indoor air quality

Solar Energy ◽

10.1016/j.solener.2004.05.012 ◽

2004 ◽

Vol 77 (2) ◽

pp. 129-135 ◽

Cited By ~ 56

Author(s):

W.H Ching ◽

Michael Leung ◽

Dennis Y.C Leung

Keyword(s):

Thin Film ◽

Air Quality ◽

Photocatalytic Degradation ◽

Indoor Air Quality ◽

Indoor Air ◽

Tio2 Thin Film ◽

Sol Gel ◽

Gaseous Formaldehyde

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Studies of Photocatalytic Degradation of Trace-Level MC-LR in Water on Thin Film of Titanium Dioxide

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.951 ◽

2007 ◽

Vol 121-123 ◽

pp. 951-954

Author(s):

X.G. Feng ◽

F. Rong ◽

Tao Wei ◽

Chun Wei Yuan

Keyword(s):

Thin Film ◽

Photocatalytic Degradation ◽

Tio2 Thin Film ◽

Solid Phase ◽

Sol Gel ◽

Kinetic Equations ◽

Dip Coating ◽

Hplc Method ◽

Trace Level ◽

Coating Method

MCs are produced by cyanobacteria and cause concerns in potable water due to toxicity. Conventional treatments are poor at removing MCs. In the present study, the photocatalytic degradation of MC-LR was conducted using nano-TiO2 thin film, prepared by sol-gel and dip-coating method, with UV 365nm irradiation. According to analysis results from solid-phase extraction combined with HPLC method, the trace-level MC-LR is easily to be removed by photocatalytic system. The degradation efficiency of MC-LR is influenced by the pH conditions, initial concentration due to adsorption of MC-LR on TiO2 thin film. The maximum initial rate of photocatalytic degradation occurs at pH 4 and over 95% of 20μg/L MC-LR is decomposed within 120min. The kinetic equations and parameters revealed that degradation reaction of trace level MC-LR, which depicted by pseudo first order kinetics process in appearance, was in accordance with Langmuir-Hinshelwood kinetics model well, the corresponding rate constant k and Langmuir adsorption constant K were determined to be 19.72μg/l·min-1 and 6.57×10-4l/μg, respectively.

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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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Preparation of Glass Plate-Supported Nanostructure ZnO Thin Film Deposited by Sol-Gel Spin-Coating Technique and Its Photocatalytic Degradation to Monoazo Textile Dye

Journal of Nanomaterials ◽

10.1155/2008/356765 ◽

2008 ◽

Vol 2008 ◽

pp. 1-5 ◽

Cited By ~ 18

Author(s):

Mohammad Hossein Habibi ◽

Mohammad Khaledi Sardashti

Keyword(s):

Thin Film ◽

Thin Films ◽

Photocatalytic Degradation ◽

Spin Coating ◽

Sol Gel ◽

Glass Plate ◽

Zno Thin Films ◽

Visible Range ◽

Textile Dye ◽

Axis Orientation

Glass plate-supported nanostructure ZnO thin films were deposited by sol-gel spin coating. Films were preheated at275∘Cfor 10 minutes and annealed at 350, 450, and550∘Cfor 80 minutes. The ZnO thin films were transparent ca 80–90% in visible range and revealed that absorption edges at about 370 nm. Thec-axis orientation improves and the grain size increases which was indicated by an increase in intensity of the (002) peak at34.4∘in XRD corresponding to the hexagonal ZnO crystal. The photocatalytic degradation of X6G an anionic monoazo dye, in aqueous solutions, was investigated and the effects of some operational parameters such as the number of layer and reusability of ZnO nanostructure thin film were examined. The results showed that the five-layer coated glass surfaces have a very high photocatalytic performance.

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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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Study on the Thermal Treatment of Nano-Ag/TiO2 Thin Film

ISRN Nanotechnology ◽

10.5402/2011/614243 ◽

2011 ◽

Vol 2011 ◽

pp. 1-5

Author(s):

Peng Bing ◽

Wang Jia ◽

Chai Li-yuan ◽

Wang Yun-yan ◽

Mao Ai-li

Keyword(s):

Thin Film ◽

Methyl Orange ◽

Thermal Treatment ◽

Photocatalytic Degradation ◽

Tio2 Thin Film ◽

Heating Temperature ◽

Antibacterial Properties ◽

Heating Time ◽

Degradation Rates ◽

Temperature Heating

The photocatalytic degradation rates of methyl orange and antibacterial properties of nano-Ag/TiO2 thin film on ceramics were investigated in this study. XRD was used to detect the structure of film to clarify the impacts on the rates and properties. The effect of film layers, heating temperature, heating time, and embedding of Ag+ on the degradation rates and antibacterial properties were ascertained. The nano-Ag/TiO2 film of 3 layers with AgNO3 3% embedded and treated at 350°C for 2 h would exhibit good performance.

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Photocatalytic Degradation of Different VOCs in the Gas-Phase over TiO2 Thin Films Prepared by Ultrasonic Spray Pyrolysis

Catalysts ◽

10.3390/catal9110915 ◽

2019 ◽

Vol 9 (11) ◽

pp. 915 ◽

Cited By ~ 4

Author(s):

Ibrahim Dundar ◽

Marina Krichevskaya ◽

Atanas Katerski ◽

Malle Krunks ◽

Ilona Oja Acik

Keyword(s):

Thin Film ◽

Thin Films ◽

Photocatalytic Degradation ◽

Spray Pyrolysis ◽

Tio2 Thin Film ◽

Ultrasonic Spray Pyrolysis ◽

Airflow Rate ◽

Tio2 Films ◽

Tio2 Thin Films ◽

Ultrasonic Spray

In this study, we deposited TiO2 thin films onto borosilicate glass by ultrasonic spray pyrolysis at 350 and 450 °C. The aim of study is to determine the effect of deposition temperature on photocatalytic activity of TiO2 thin films and to investigate the performance of TiO2 thin films on photocatalytic degradation of methyl tert-butyl ether (MTBE), acetone, acetaldehyde, and heptane as functions of different operating parameters. TiO2 thin films deposited at 350 and 450 °C have a thickness value of 190 and 330 nm, respectively. All as-prepared TiO2 films possess an anatase crystalline structure. According to the X-ray photon spectroscopy (XPS) study, the TiO2 thin film deposited at 350 °C showed a higher amount of oxygen vacancies and hydroxyl groups on the film surface after UV treatment. The aged-TiO2 thin film deposited at 350 °C showed a water contact angle (WCA) value of 0° after 10 min UV irradiation, showing superhydrophilic surface behavior. The TiO2 film deposited at 350 °C exhibited the highest amount of conversion of MTBE (100%). The results also showed that TiO2 films are capable of photocatalytic degradation of MTBE (100%) and acetaldehyde (approx. 80%) in humid air conditions and high airflow rate. The visible-light-activity of TiO2 thin films was tested with 5 ppm MTBE and acetone. TiO2 thin films deposited at 350 °C with a surface area of 600 cm2 showed 60% of MTBE and 33% of acetone degradation under VIS light.

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