Effects of rf-power and working pressure on formation of rutile phase in rf-sputtered TiO2 thin film

M-CNTs (Multiwall Carbon Nano Tubes) can be used as an electrode, transferring electrons and heat very easily. This property helps transfer electrons created in TiO2 layer of DSSC (Dye-sensitized Solar Cell). CNTs layer with TiO2 utilized for the photocatalyst is expected to contribute to improve the efficiency of the solar cell. The Photocatalyst of TiO2 thin film was manufactured from titanium isopropoxide, ethanol, and HCl by a sol-gel process. To determine the property of TiO2 thin film with CNT, we performed to mix acid dispersed CNT in TiO2 Sol-gel and make coating membranes using sol-gel with different densities of CNT. It was found that the crystal structure changed from the anatase phase to the rutile phase having higher efficiency by XRD measure after treatment of high temperature sintering. To demonstrate the property of each sample, the transmittance of the TiO2 thin film was measured by a spectrometer and dispersion of CNT of the thin film was measured by SEM. In conclusion, the capacitance as the parameter which can affect performance of DSSC was investigated.

Download Full-text

Parameter effect on the crystallization of Nd:yttrium aluminum garnet laser-ablated TiO2 thin film

Journal of Materials Research ◽

10.1557/jmr.2001.0435 ◽

2001 ◽

Vol 16 (11) ◽

pp. 3158-3161 ◽

Cited By ~ 6

Author(s):

Mrinal Pal ◽

Aiko Narazaki ◽

Takeshi Sasaki ◽

Naoto Koshizaki

Keyword(s):

Thin Film ◽

Phase Transition ◽

Tio2 Thin Film ◽

Deposition Time ◽

Anatase Phase ◽

Rutile Phase ◽

Helium Gas ◽

Lower Temperature ◽

Parameter Dependency ◽

The Relationship

Process parameter dependency on the phase transition from anatase to rutile phase of laser-ablated TiO2 films was investigated. Lower ambient argon pressure, longer deposition time, higher laser fluence, and smaller target–substrate separation give rutile phase from anatase phase at comparatively lower temperature. The relationship between thickness and onset temperature of anatase–rutile transformation can be comprehensively explained in terms of film thickness. Thinner films have higher phase transition temperature. The presence of helium gas during deposition favors the anatase–rutile transition at a temperature lower than that expected from the above relationship.

Download Full-text

Pengaruh Pendopingan Karbon Terhadap Struktur Kristal dan Morfologi TIO2

Talenta Conference Series Science and Technology (ST) ◽

10.32734/st.v2i2.492 ◽

2019 ◽

Vol 2 (2) ◽

Author(s):

Frastica Deswardani ◽

Helga Dwi Fahyuan ◽

Rimawanto Gultom ◽

Eif Sparzinanda

Keyword(s):

Thin Film ◽

Crystal Structure ◽

Grain Size ◽

Tio2 Thin Film ◽

Crystal Size ◽

Diffraction Peak ◽

Carbon Doping ◽

Tio2 Anatase ◽

Spray Method ◽

Carbon Analysis

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.

Download Full-text

Effect of Sputtering Working Pressure on the Optical and Electrical Properties of InZnO Thin-Film Transistors

Korean Journal of Materials Research ◽

10.3740/mrsk.2020.30.4.211 ◽

2020 ◽

Vol 30 (4) ◽

pp. 211-216

Author(s):

Ji-Min Park ◽

Hyoung-Do Kim ◽

Seong Cheol Jang ◽

Hyun-Suk Kim

Keyword(s):

Thin Film ◽

Electrical Properties ◽

Thin Film Transistors ◽

Optical And Electrical Properties ◽

Working Pressure

Download Full-text

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.

Download Full-text