scholarly journals Electrospun Nitrogen-doped TiO2 Nanofibrous Thin Film for Photovoltaic Application

2019 ◽  
Vol 8 (4) ◽  
pp. 6994-7000
Keyword(s):  
Thin Film ◽  
Visible Light ◽  
Sol Gel ◽  
Photovoltaic Cell ◽  
Titanium Isopropoxide ◽  
Tio2 Particle ◽  
Doped Tio2 ◽  
Nitrogen Doped ◽  
Doctor Blade ◽  
Tio2 Nanofiber

This research study aims at fabrication of fine size nitrogen doped TiO2 nanofiber using electrospinning method and evaluation of the performance of TiO2 in a photovoltaic cell under visible light irradiation. Undoped and N doped TiO2 nanoparticles were synthesized by sol gel method where titanium isopropoxide was used as the source of TiO2 and ammonium nitrate was used as the source of N dopant. TiO2 /PVA composite material was prepared by stabilizing TiO2 particle in to 10 wt % of PVA (aq) solution in order to prepare thin film that can be coated on photovoltaic (PV) cells. Coating of solid thin film PV cells by TiO2 /PVA nanofibers was conducted using electrospinning and doctor blade method. In both systems, doping the TiO2 with nitrogen improved its optical properties which it successfully lowered the band gap energy from 3.14 to 2.76 eV and shifted its optical response to the visible light region. The presence of O-H stretching vibration, O-H bending and vibration of the N-Ti bond contributed to an increased performance of the PV cells. The electrospun N-doped TiO2 produced better power output than doctor blade method coated PV cells with power of 0.040 and 0.026 mW, respectively.

scholarly journals Synthesis and characterization of Fe(III)-doped ceramic membranes of titanium dioxide and its application in photoelectrocatalysis of a textile dye

2017 ◽  
Vol 36 (1) ◽  
pp. 18
Author(s):  
Emanuel C. Rodrigues ◽  
Layciane A. Soares ◽  
Marco A. Modenes Jr. ◽  
Jeosadaque J. Sene ◽  
Gilbert Bannach ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Ceramic Membranes ◽  
Titanium Isopropoxide ◽  
Textile Dye ◽  
Doped Tio2 ◽  
Precursor Material ◽  
Thin Film Electrodes ◽  
Nanocrystalline Anatase Tio2

Pure and Fe(III)-doped TiO2 suspensions were prepared by the sol gel method with the use of titanium isopropoxide (Ti(OPri)4) as precursor material. The properties of doped materials were compared to TiO2 properties based on the characterization by thermal analysis (TG-DTA and DSC), X-ray powder diffractometry and spectroscopy measurements (FTIR). Both undoped and doped TiO2 suspensions were used to coat metallic substrate as a mean to make thin-film electrodes. Thermal treatment of the precursors at 400°C for 2 h in air resulted in the formation of nanocrystalline anatase TiO2. The thin-film electrodes were tested with respect to their photocatalytic performance for degradation of a textile dye in aqueous solution. The plain TiO2 remains as the best catalyst at the conditions used in this report.

Highly Visible Light Activity of Nitrogen Doped TiO2 Prepared by Sol–Gel Approach

2016 ◽  
Vol 46 (1) ◽  
pp. 158-166 ◽  
Author(s):  
Le Dien Than ◽  
Ngo Sy Luong ◽  
Vu Dinh Ngo ◽  
Nguyen Manh Tien ◽  
Ta Ngoc Dung ◽  
...  
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Doped Tio2 ◽  
Nitrogen Doped ◽  
Light Activity

scholarly journals Synthesis and Characterization of Pure and Nitrogen Doped Titanium Oxide Nanocrystallites for Visible Light Photocatalytic Applications

2021 ◽  
Vol 33 (4) ◽  
pp. 853-858
Author(s):  
R. Girija ◽  
S. Stella Mary ◽  
G. Balakrishnan
Keyword(s):  
Visible Light ◽  
Titanium Oxide ◽  
Energy Gap ◽  
Anatase Phase ◽  
Sol Gel ◽  
Blue Dye ◽  
Hydroxyl Groups ◽  
Band Shift ◽  
Doped Tio2 ◽  
Nitrogen Doped

The pure and nitrogen doped titanium oxide (TiO2) nanocrystallites were synthesized using sol-gel technique. The synthesized nanoparticles were characterized to examine the microstructural, optical and photocatalytic properties. The XRD studies of pure and doped TiO2 showed the formation of polycrystalline tetragonal structure with anatase phase. The crystallite sizes were calculated and found to be 17 and 15 nm for the pure and N-doped TiO2, respectively. FTIR studies indicated that the N-doped TiO2 bands are stronger compared with pure TiO2, indicating the more hydroxyl groups. FESEM studies showed the uniform formation of TiO2 nanocrystallites and spherical in shape with agglomeration. The photoluminescence spectra of the samples show emission peaks, indicating the band to band shift having the energy gap of 2.9 eV. The photocatalytic performance of the nanocatalyst was studied using methylene blue dye under visible light irradiation for 90 min. The photocatalytic efficiency of 66.9% and 85.8% is obtained for the pure and N-doped TiO2, respectively.

Photocatalytic Activity and Visible-Light Response of TiO2 Thin Film Doped with Nitrogen by Using Urea

2017 ◽  
Vol 870 ◽  
pp. 418-423
Author(s):  
Chuya Ogawa ◽  
Kozo Taguchi
Keyword(s):  
Thin Film ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Light Response ◽  
Photocatalytic Decomposition ◽  
Simple Process ◽  
Nitrogen Doped ◽  
Visible Light Response ◽  
Fto Glass

TiO2 has become a widely investigated photocatalyst because of its low cost, low toxicity and high photocatalytic activity under UV irradiation that causes photocatalytic decomposition of organic compounds. Impurities dopant and metal are often used to acquire impurities doped or metal doped TiO2 powder by a sol-gel method. In this paper, we made nitrogen doped TiO2 by a simple process. TiO2 (P25) thin films with 80 % of anatase and 20 % of rutile were fabricated on FTO glass by electrophoretic deposition (EPD). These were then doped with nitrogen by using urea and sintered in electric furnace at 500 and 600 degrees Celsius. EPD was superior for film formation at dispersibility. We calculated absorbance spectra of nitrogen doped TiO2 thin film fabricated on FTO glass. As the result, 600 degrees Celsius is superior sintering temperature at absorbance under visible light than 500 degrees Celsius. Moreover, when the samples sintered at 600 degrees Celsius, each additive amount had different increment of absorbance in specific visible light range. This result indicates the improvement in visible-light response on TiO2 by the simple process. To further research, it is essential to make nitrogen doped TiO2 under pressure and measure the photodegradation reaction.

scholarly journals Synthesis and characterization of Fe(III)-doped ceramic membranes of titanium dioxide and its application in photoelectrocatalysis of a textile dye

2011 ◽  
Vol 36 (1) ◽  
pp. 18-36 ◽  
Author(s):  
Emanuel C. Rodrigues ◽  
Layciane. A. Soares ◽  
Marco A. Modenes Jr ◽  
Jeosadaque J. Sene ◽  
Gilbert Bannach ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Ceramic Membranes ◽  
Titanium Isopropoxide ◽  
Textile Dye ◽  
Doped Tio2 ◽  
Precursor Material ◽  
Thin Film Electrodes ◽  
Nanocrystalline Anatase Tio2

Pure and Fe(III)-doped TiO2 suspensions were prepared by the sol gel method with the use of titanium isopropoxide (Ti(OPri)4) as precursor material. The properties of doped materials were compared to TiO2 properties based on the characterization by thermal analysis (TG-DTA and DSC), X-ray powder diffractometry and spectroscopy measurements (FTIR). Both undoped and doped TiO2 suspensions were used to coat metallic substrate as a mean to make thin-film electrodes. Thermal treatment of the precursors at 400ºC for 2 h in air resulted in the formation of nanocrystalline anatase TiO2. The thin-film electrodes were tested with respect to their photocatalytic performance for degradation of a textile dye in aqueous solution. The plain TiO2 remains as the best catalyst at the conditions used in this report.

Degradation of Indoor Ammonia Using TiO2 Thin Film Doped with Iron(III) under Visible Light Illumination

2013 ◽  
Vol 668 ◽  
pp. 136-139
Author(s):  
Shuai Jie Wang ◽  
Hao Yu ◽  
Xue Qin Gao
Keyword(s):  
Thin Film ◽  
Visible Light ◽  
Tio2 Thin Film ◽  
Sol Gel ◽  
Visible Region ◽  
Reaction Rate Constant ◽  
Light Illumination ◽  
Doping Amount ◽  
Doped Tio2 ◽  
Vis Spectroscopy

A type of titania thin film doped with iron(III) was prepared by means of sol-gel method to degrade indoor ammonia (NH3) under visible light irradiation. The photocatalysts was characterized by X-ray diffraction (XRD) and UV-vis spectroscopy. The results demonstrated that the adsorption edge of doped TiO2 thin film had red shifts and the doped TiO2 thin film had a stronger absorption than undoped TiO2 thin film in the visible region. Doping amount of Fe(III) effected the photocatalytic actitivity of Fe-doped TiO2 thin film significantly. The optimal doping amount of Fe(III) was 1%(mole fraction). Using the optimal Fe-doped TiO2 thin film, the removal percentage of NH3 after 9h phtocatalytic reaction under visible light reached 53.1%. The degradation reaction of NH3 was successfully described by the pseudo first-order kinetics. The reaction rate constant decreased with the increase of initial concentration of NH3, which reflected that there was oxidation competition between NH3 and its intermediate during the photocatalytic process.

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