scholarly journals Efficient Dye Contaminant Elimination and Simultaneously Electricity Production via a Bi-Doped TiO2 Photocatalytic Fuel Cell

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 210
Author(s):  
Dong Liu ◽  
Chunling Li ◽  
Congyue Zhao ◽  
Er Nie ◽  
Jianqiao Wang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Visible Light ◽  
Sol Gel ◽  
Oxygen Demand ◽  
Light Response ◽  
Electricity Production ◽  
Doped Tio2 ◽  
Screen Printing Technique ◽  
One Step ◽  
Photocatalytic Fuel Cell

TiO2 develops a higher efficiency when doping Bi into it by increasing the visible light absorption and inhibiting the recombination of photogenerated charges. Herein, a highly efficient Bi doped TiO2 photoanode was fabricated via a one-step modified sol-gel method and a screen-printing technique for the anode of photocatalytic fuel cell (PFC). A maximum degradation rate of 91.2% of Rhodamine B (RhB) and of 89% after being repeated 5 times with only 2% lost reflected an enhanced PFC performance and demonstrated an excellent stability under visible-light irradiation. The excellent degradation performance was attributed to the enhanced visible-light response and decreased electron-hole recombination rate. Meanwhile, an excellent linear correlation was observed between the efficient photocurrent of PFC and the chemical oxygen demand of solution when RhB is sufficient.

Preparation, Characterization, and Photocatalytic Property of N-La Co-Doped TiO2 with Visible Light Response

2012 ◽  
Vol 529 ◽  
pp. 537-540 ◽  
Author(s):  
Gui Hua Li ◽  
An Feng Wang
Keyword(s):  
Visible Light ◽  
Reaction Temperature ◽  
Catalyst Activity ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Light Response ◽  
Catalyst Amount ◽  
Doped Tio2 ◽  
Sol Gel Process ◽  
Co Doped

N-La co-doped TiO2 has been synthesized via sol-gel process. The XRD result showed that the structure of N-La co-doped TiO2 was anatase. Their performance of photocatalytic degradation of methylene blue under visible light were investigated. The combined effects of catalyst compsition, calcination temperature, catalyst amount and reaction temperature on catalyst activity were investigated. Experiment results depicted that activeness of catalyst N2.5La0.5/TiO2 calcinated at 500°C for 2h was highest. Using this catalyst, when the catalyst amount was 0.35 g/L, the reaction temperature was 40°C the degradation rate of mehylene blue in 4h could reach 96.5%.

scholarly journals Preparation and Characterization of Copper, Iron, and Nickel Doped Titanium Dioxide Photocatalysts for Decolorization of Methylene Blue

2021 ◽  
Vol 50 (1) ◽  
pp. 135-149
Author(s):  
Jawed Qaderi ◽  
Che Rozid Mamat ◽  
Aishah Abdul Jalil
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Uv Light ◽  
Irradiation Time ◽  
Sol Gel ◽  
Light Response ◽  
Pure Tio2 ◽  
Necessary Condition ◽  
Doped Tio2 ◽  
Bet Analysis

The visible-light response is a necessary condition for titanium dioxide (TiO2) photocatalyst to function as a visible light active photocatalyst. This condition can be solved by investigation of the bandgaps and the optimization of doping levels of multivalency metal-doped TiO2. In this study, pure and Cu, Fe, and Ni-doped TiO2 photocatalysts were prepared by the sol‐gel method. The photocatalysts were characterized using XRD, FTIR, FESEM, EDX, N2 physisorption, and UV‐Vis spectrophotometry techniques. The XRD patterns of all pure TiO2 and Cu/TiO2, Fe/TiO2, and Ni/TiO2samples showed the dominant structure of the anatase TiO2 phase. The presence of functional groups at the interface of TiO2 particles was showed by FTIR. The FESEM analysis showed that the particle size of the prepared samples was uniform with spherical morphology. EDX results showed that TiO2 has successfully incorporated Cu, Fe, and Ni metals onto its surface. The BET analysis showed that the specific surface area of the doped samples increased with the amount of doping. The optical properties of all samples were carried out using UV-DRS measurements and their obtained bandgap energies were in the range of 3.22 - 3.42 eV. The pure TiO2 displayed more than 98% and 97% decolorization rates for MB solution at the end of irradiation time of 5 h under UV and visible light, respectively. Among the doped samples, 3 mol% Ni/TiO2 and Cu/TiO2 demonstrated the highest photocatalytic activity (97.65%) under UV light and 6 mol% Ni/TiO2 under visible light for MB (96.86%) decolorization.

One step solvothermal synthesis of ultra-fine N-doped TiO2 with enhanced visible light catalytic properties

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60522-60529 ◽  
Author(s):  
S. M. Y. Mohamed Mukthar Ali ◽  
Sandhya K. Y.
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Solvothermal Synthesis ◽  
Catalytic Properties ◽  
Light Response ◽  
Doped Tio2 ◽  
Nitrogen Doped ◽  
Visible Light Response ◽  
One Step ◽  
The One

Herein, we report the one-step solvothermal synthesis of nitrogen doped TiO2 using N-methyl-2-pyrollidone as solvent cum dopant. The method leads to higher surface area, highly crystalline anatase TiO2 with improved visible light response.

Manufacturing Processes of Solid Oxide Fuel Cell Components

2007 ◽  
Vol 336-338 ◽  
pp. 498-501
Author(s):  
Xian Feng Jiang ◽  
Min Fang Han ◽  
Su Ping Peng
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Screen Printing ◽  
Sol Gel ◽  
Tape Casting ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cell Components ◽  
One Step ◽  
Made In

The all processes for manufacturing materials parts of solid oxide fuel cell (SOFC) are discussed in the paper. The films are made in one step by the ways of APS, VPS, EVD, which are usually used to produce the electrolyte and interconnect. The films are thin and good gas-resistance, but with relatively high cost. All parts of SOFC are made by the following ways, such as sol-gel, tape casting, tape calendaring and screen printing, which are suitable for manufacturing samples in industry with the cheapest process by co-sintered together ways.

scholarly journals Green Synthesis of N/Zr Co-Doped TiO2 for Photocatalytic Degradation of p-Nitrophenol in Wastewater

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 235
Author(s):  
Hayette Benkhennouche-Bouchene ◽  
Julien G. Mahy ◽  
Cédric Wolfs ◽  
Bénédicte Vertruyen ◽  
Dirk Poelman ◽  
...  
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Visible Region ◽  
Chemical Properties ◽  
Pure Tio2 ◽  
Molar Ratio ◽  
Xps Spectra ◽  
Doped Tio2 ◽  
Co Doped

TiO2 prepared by a green aqueous sol–gel peptization process is co-doped with nitrogen and zirconium to improve and extend its photoactivity to the visible region. Two nitrogen precursors are used: urea and triethylamine; zirconium (IV) tert-butoxide is added as a source of zirconia. The N/Ti molar ratio is fixed regardless of the chosen nitrogen precursor while the quantity of zirconia is set to 0.7, 1.4, 2, or 2.8 mol%. The performance and physico-chemical properties of these materials are compared with the commercial Evonik P25 photocatalyst. For all doped and co-doped samples, TiO2 nanoparticles of 4 to 8 nm of size are formed of anatase-brookite phases, with a specific surface area between 125 and 280 m2 g−1 vs. 50 m2 g−1 for the commercial P25 photocatalyst. X-ray photoelectron (XPS) measurements show that nitrogen is incorporated into the TiO2 materials through Ti-O-N bonds allowing light absorption in the visible region. The XPS spectra of the Zr-(co)doped powders show the presence of TiO2-ZrO2 mixed oxide materials. Under visible light, the best co-doped sample gives a degradation of p-nitrophenol (PNP) equal to 70% instead of 25% with pure TiO2 and 10% with P25 under the same conditions. Similarly, the photocatalytic activity improved under UV/visible reaching 95% with the best sample compared to 50% with pure TiO2. This study suggests that N/Zr co-doped TiO2 nanoparticles can be produced in a safe and energy-efficient way while being markedly more active than state-of-the-art photocatalytic materials under visible light.

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