Photoactive of Chitosan-ZrO2/TiO2 thin film in catalytic degradation of malachite green dyes by solar light

2022 ◽  
Vol 124 ◽  
pp. 111967
Author(s):  
Mohd Fadhil Majnis ◽  
Ong Chia Yee ◽  
Mohd Azam Mohd Adnan ◽  
Mohd Rashid Yusof Hamid ◽  
Ku Zilati Ku Shaari ◽  
...  
2020 ◽  
Vol 21 (3) ◽  
pp. 426-432
Author(s):  
S. Kerli ◽  
H. Eskalen

Titanium oxide (TiO2) thin film was obtained using the spray pyrolysis method. The structural properties of the thin film obtained were examined by X-ray diffraction (XRD) and it was found that it also had a tetragonal structure. The morphological feature was examined with scanning electron microscopy (SEM). In addition, the optical properties of the film were examined and the forbidden energy range was calculated. Photocatalytic properties of TiO2 thin film on dyestuff and antibiotic were investigated. Methyl blue and malachite green were used in the dye degradation test of the thin film. In particular, it was found to have a high degradation of 86% after 100 minutes on malachite green. Moreover, the degradation on ciprofloxacin after 90 minutes was found as 93%. The reusability ciprofloxacin antibiotic was investigated and it was found that synthesized TiO2 thin film has excellent stability


2021 ◽  
Vol 6 ◽  
pp. 100126
Author(s):  
Ali Hosseini ◽  
Hajir karimi ◽  
Javad Foroughi ◽  
Mohammad Mehdi Sabzehmeidani ◽  
Mehrorang Ghaedi

Author(s):  
Frastica Deswardani ◽  
Helga Dwi Fahyuan ◽  
Rimawanto Gultom ◽  
Eif Sparzinanda

Telah dilakukan penelitian mengenai pengaruh konsentrasi doping karbon pada lapisan tipis TiO2 yang ditumbuhkan dengan metode spray terhadap struktur kristal dan morfologi TiO2. Hasil karakterisasi SEM menunjukkan bahwa penambahan doping karbon dapat meningkatkan ukuran butir. Lapisan TiO2 doping karbon 8% diperoleh ukuran butir terbesar adalah 1.35 μm, sedangkan ukuran tekecilnya adalah 0.45 μm. Sementara itu, untuk lapisan tipis TiO2 didoping karbon 15% memiliki ukuran butir terbesar yaitu 1.76 μm dan terkecil 0.9 μm. Hasil XRD menunjukkan seluruh puncak difraksi lapisan tipis TiO2 dengan doping karbon 8% dan 15% merupakan TiO2 anatase. Ukuran kristal lapisan TiO2 didoping karbon 8% diperoleh sebesar 638,08 Å dan untuk pendopingan 15% karbon ukuran kristal lapisan tipis TiO2 adalah 638,09 Å, hal ini menunjukkan ukuran kristal kedua sampel tidak mengalami perubahan yang signifikan.   TiO2 thin film with carbon doping has been successfully grown by spray method. The research on the effect of carbon doping on crystal structure and morfology of TiO2 has been prepared by varying carbon concentration (8% and 15% carbon). Analysis of SEM showed that the addition of carbon may increase the grain size. Thin film of TiO2 doped carbon 8% has the largest grain size 1.35 μm, while the smallest grain size is 0.45 μm. Meanwhile, for thin film TiO2 doped carbon 15% has the largest grain size 1.76 μm and smallest 0.9 μm. The XRD results showed the entire diffraction peak of thin film TiO2 doped carbon 8% and 15% were TiO2 anatase. The crystal size of thin film TiO2 doped carbon 8% was obtained at 638.08 Å and for thin film TiO2 doped carbon 15% the crystalline size of TiO2 thin film was 638.09 Å, this shows that the crystal size of both samples did not change significantly.    


2018 ◽  
Vol 15 (2) ◽  
pp. 188-196 ◽  
Author(s):  
Chengpeng Xu ◽  
Shengying Ye ◽  
Xiaolei Cui ◽  
Quan Zhang ◽  
Yan Liang

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.


2011 ◽  
Vol 4 (4) ◽  
pp. 1411 ◽  
Author(s):  
Takashi Kamegawa ◽  
Norihiko Suzuki ◽  
Hiromi Yamashita
Keyword(s):  

2021 ◽  
Vol 46 (24) ◽  
pp. 12961-12980
Author(s):  
Amanda Chen ◽  
Wen-Fan Chen ◽  
Tina Majidi ◽  
Bernadette Pudadera ◽  
Armand Atanacio ◽  
...  

2020 ◽  
Vol 389 ◽  
pp. 125613 ◽  
Author(s):  
Salih Veziroglu ◽  
Marie Ullrich ◽  
Majid Hussain ◽  
Jonas Drewes ◽  
Josiah Shondo ◽  
...  

2021 ◽  
Author(s):  
Olufemi Olatidoye ◽  
Daria Thomas ◽  
Bishnu Bastakoti

A facile synthesis of a mesoporous TiO2 thin film is reported using poly(styrene-2-vinyl pyridine-ethylene oxide) polymeric micelle as a synthetic template. As the Ti precursor strongly binds with polymeric micelles...


2007 ◽  
Vol 120 (2) ◽  
pp. 133-138 ◽  
Author(s):  
Masaaki Kitano ◽  
Masato Takeuchi ◽  
Masaya Matsuoka ◽  
John M. Thomas ◽  
Masakazu Anpo

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