Photocatalytic degradation of the acetaminophen by nanocrystal-engineered TiO2 thin film in batch and continuous system

2020 ◽  
Vol 15 (2) ◽  
Author(s):  
Reza Katal ◽  
Mohammad Tanhaei ◽  
Jiangyong Hu
Keyword(s):  
Thin Film ◽  
Photocatalytic Degradation ◽  
Tio2 Thin Film ◽  
Continuous System

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

2018 ◽  
Vol 15 (2) ◽  
pp. 188-196 ◽  
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.

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

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.

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

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 915 ◽  
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.

Photocatalytic degradation of H-acid over a novel TiO2 thin film fixed bed reactor and in aqueous suspensions

2003 ◽  
Vol 156 (1-3) ◽  
pp. 179-187 ◽  
Author(s):  
M Noorjahan ◽  
M Pratap Reddy ◽  
V Durga Kumari ◽  
B Lavédrine ◽  
P Boule ◽  
...  
Keyword(s):  
Thin Film ◽  
Photocatalytic Degradation ◽  
Tio2 Thin Film ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Aqueous Suspensions

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

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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