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%.

Preparation of N-Ce Co-Doped TiO2 Nanopaticles and their Photocatalytic Performance under Visible Light

2012 ◽  
Vol 457-458 ◽  
pp. 1035-1038 ◽  
Author(s):  
Gui Hua Li ◽  
An Feng Wang
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Reaction Temperature ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Solution Ph ◽  
Catalyst Amount ◽  
Sol Gel Process ◽  
Co Doped

In this present work, N-Ce co-doped TiO2 nanopaticles were prepared via sol-gel process and characterized by TG - DTA and XRD. Their performance of photocatalytic degradation of methylene blue under visible light were investigated. N-Ce co-doped TiO2 appeared to be somewhat more efficient than the starting TiO2. The effects of catalyst compsition, catalyst amount, reaction temperature and solution pH on their photocatalytic activity towards methylene blue were studied and discussed. Experiment results depicted that activeness of catalyst N0.4Ce0.06/TiO2 was highest. Using this catalyst, when the catalyst amount was 0.3 g/L，the reaction temperature was 40 °C and pH of the solution was 9.0 the degradation rate of mehylene blue in 4h could reach 94.00%.

Synthesis of visible-light responsive C, N and Ce co-doped TiO2 mesoporous membranes via weak alkaline sol–gel process

2012 ◽  
Vol 22 (30) ◽  
pp. 15309 ◽  
Author(s):  
Xue Ping Cao ◽  
Dan Li ◽  
Wen Heng Jing ◽  
Wei Hong Xing ◽  
Yi Qun Fan
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Doped Tio2 ◽  
Sol Gel Process ◽  
Mesoporous Membranes ◽  
Co Doped

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.

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.

Ni-Bi co-doped TiO2 as highly visible light response nano-photocatalyst for CO2 photo-reduction in a batch photo-reactor

2020 ◽  
Vol 41 ◽  
pp. 101289
Author(s):  
Reza Nematollahi ◽  
Cyrus Ghotbi ◽  
Farhad Khorasheh ◽  
Afsanehsadat Larimi
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Doped Tio2 ◽  
Visible Light Response ◽  
Co Doped

A facile approach to synthesize N and B co-doped TiO2 nanomaterials with superior visible-light response

2010 ◽  
Vol 64 (15) ◽  
pp. 1728-1731 ◽  
Author(s):  
Guosheng Wu ◽  
Jiali Wen ◽  
Jingpeng Wang ◽  
Dan F. Thomas ◽  
Aicheng Chen
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Doped Tio2 ◽  
Visible Light Response ◽  
Tio2 Nanomaterials ◽  
Co Doped

scholarly journals Sol-Gel Synthesized N and MN Co-Doped Tio2 Nanomaterial for Photocatalytic Degradation of Malathion under Visible Light Irradiation

2019 ◽  
Vol 9 (2) ◽  
pp. 3688-3694
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Light Irradiation ◽  
Average Particle ◽  
Doped Tio2 ◽  
Sem And Tem ◽  
Ft Ir ◽  
Co Doped

Different weight percentages (0.25-1.00 wt%) of Nitrogen (Non-Metal) and Manganese (Metal) co-doped nano titania were synthesized by sol-gel method and characterized by XRD, UV-vis.DRS, FT-IR, XPS, SEM and TEM. The XRD results has shown that all the prepared catalysts are in anatase phase indicating that co-doping of N and Mn did not affect the crystal structure of TiO2 . From the UV-vis.DRS spectra a significant absorption shift towards visible region was noticed in N and Mn co-doped TiO2 and their presence was confirmed by XPS and FT-IR results. SEM and TEM results showed spherical nanoparticles with average particle size of 9 nm. Photocatalytic efficiency of synthesized nano materials was tested on non-biodegradable organophosphorous pesticide, Malathion under visible light irradiation. The effect of dopant concentration, pH, catalyst dosage, and initial pesticide concentration on photocatalytic degradation of malathion was studied and optimum conditions were established. Among the synthesized samples 0.50 wt% N & 1.00 wt% Mn-TiO2 exhibited best photocatalytic performance. Photoluminiscent spectroscopy (PL) was used to examine the rate of production of oxidative species, hydroxyl radicals which play key role in photocatalytic degradation.

Preparation of N, Fe co-doped TiO2 with visible light response

2011 ◽  
Vol 207 (1-3) ◽  
pp. 165-169 ◽  
Author(s):  
Xue Li ◽  
Zhimin Chen ◽  
Yongchao Shi ◽  
Yunyi Liu
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Doped Tio2 ◽  
Visible Light Response ◽  
Co Doped
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