Preparation and Photocatalytic Property of Lanthanum-Doped TiO2 Nanoparticles

2012 ◽  
Vol 549 ◽  
pp. 584-588
Author(s):  
Qing Li ◽  
Rui Zhi Wen
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Methyl Orange ◽  
Particle Size Distribution ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Photocatalytic Efficiency ◽  
Mass Percentage ◽  
Supercritical Fluid Drying ◽  
Degradation Of Methyl Orange

Nano-TiO2 photocatalyst powders were prepared through the sol-gel method and supercritical fluid drying(SCFD). The TG-DTA、XRD、particle size distribution technique、SEM were used to characterize the hyperfine TiO2 particles.The lanthanum-doped TiO2 with different mass percentage of La3+ were compared with pure TiO2 when used as photocatalyst in degradation of methyl orange. The best catalytic activity was observed with 0.02(mol)%La-TiO2. Photocatalytic efficiency of the 0.02(mol)%La- TiO2 is improved by 30.79% comparing to pure TiO2.

Sol-Gel Template Synthesis and Photocatalytic Property of Nano-TiO2 Co-Doped with La and Fe

2012 ◽  
Vol 549 ◽  
pp. 36-40
Author(s):  
Qing Li
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Particle Size Distribution ◽  
Supercritical Fluid ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Photocatalytic Efficiency ◽  
Mass Percentage ◽  
Supercritical Fluid Drying ◽  
Co Doped

Nano-TiO2 co-doped with lanthanum and iron photocatalyst powders were prepared with the sol-gel method and supercritical fluid drying(SCFD). The XRD、particle size distribution technique、TEM were used to characterize the hyperfine TiO2 particles.The TiO2 co-doped with different mass percentage of La3+ and Fe3+ were compared with pure TiO2 when being used as photocatalyst in degradation of methyl orange.The best catalytic activity was observed by TiO2 co-doped with 0.02%La-0.05%Fe(mol).Photocatalytic efficiency of the TiO2 co-doped with 0.02%La and 0.05%Fe is 1.625 times the pure TiO2.

Influence of the Ratio of ZnO/SnO2 on the Photocatalytic Property of ZnO/SnO2 Nanometer Powder

2012 ◽  
Vol 562-564 ◽  
pp. 435-438
Author(s):  
Xin You Huang ◽  
Chun Hua Gao ◽  
Zhi Gang Chen
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Raw Materials ◽  
Photocatalytic Property ◽  
Reaction Model ◽  
Nanocomposite Powder ◽  
Transmission Electron ◽  
Sno2 Powder ◽  
Degradation Of Methyl Orange

ZnO/SnO2 nanocomposite powder were prepared by coprecipitation method with SnCl4·5H2O, ZnNO3·6H2O, HCl, NaOH as raw materials. Influence of different mol ratio of ZnO/SnO2 on the photocatalytic activity of ZnO/SnO2 nanocomposite powder was researched by the degradation of methyl orange as a reaction model. The particle size and dispersion of ZnO/SnO2 powder was characterized by transmission electron microscope(TEM). The results show that the photocatalytic activity of ZnO/SnO2 nanocomposite powder was increased significantly when compounded by SnO2, the photoactivating activity of ZnO/SnO2 powder starts increasing and then decreasing when the ratio of ZnO/SnO2 decreases. When ZnO:SnO2 is the ratio of 4:1(mol ratio)，the photocatalytic activity of ZnO/SnO2 nanocomposite powder is the best and the degradation rate of methyl orange is 42.09% when visible light illuminate for 225 minutes, particle size is 20-30 nanometer and dispersion is good.

Preparation and Characterization of Fe3+ / TiO2 Thin Films Loaded Activated Carbon and Degradation of Methyl Orange

2011 ◽  
Vol 332-334 ◽  
pp. 134-137 ◽  
Author(s):  
Xiao Dong Hu ◽  
Hua Deng ◽  
Lin Du
Keyword(s):  
Particle Size ◽  
Activated Carbon ◽  
Methyl Orange ◽  
Titanium Dioxide Nanoparticles ◽  
Sol Gel ◽  
Titania Nanoparticles ◽  
Fluorescent Light ◽  
High Catalytic Activity ◽  
Iron Doped ◽  
Degradation Of Methyl Orange

Sol - gel method and doped with Fe3+ modification techniques were used, prepared for high catalytic activity of iron-doped titanium dioxide nanoparticles,which loaded on the activated carbon for Degradation of Methyl Orange. Such as crystal structure, particle size, load morphology, chemical state and optical absorption characteristics of the doped titania nanoparticles were characterized by using XRD, SEM, and UV-Vis. Fe-TiO2 catalysts for visible light response and the catalytic degradation of methyl orange in water performance were studied. The results showed that: catalysts prepared were anatase, the particle size decreases with the more amount of iron-doped. The phenomenon of Fe3+-modified TiO2 red shift were obviously. Compared with the undoped catalyst,degradation of Fe3+-TiO2 containing activated carbon improved significantly both in the UV and fluorescent light.

scholarly journals Sol-Gel Synthesized MagneticMnFe2O4Spinel Ferrite Nanoparticles as Novel Catalyst for Oxidative Degradation of Methyl Orange

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Linfeng Zhang ◽  
Yuanxin Wu
Keyword(s):  
Catalytic Activity ◽  
Methyl Orange ◽  
Surface Area ◽  
Spinel Ferrite ◽  
Sol Gel ◽  
Oxidative Degradation ◽  
Ferrite Nanoparticles ◽  
Magnetic Response ◽  
X Ray ◽  
Degradation Of Methyl Orange

The MnFe2O4spinel ferrite nanoparticles with sensitive magnetic response properties and high specific surface area were prepared from metal nitrates by the sol-gel process as catalysts for oxidative degradation of methyl orange (MO). The nanoparticles were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), BET surface area analysis, H2-Temperature programmed reduction (H2-TPR), X-ray photoelectron spectra (XPS), and vibration sample magnetometer (VSM). The catalytic activity experimental results showed that the MnFe2O4spinel ferrite nanoparticles possess very high MO degradation activity. It is expected that this kind of MnFe2O4spinel ferrite nanoparticles has a potential application in water treatment fields due to its sensitive magnetic response properties and high catalytic activity.

Photo-Catalytic Activity of Fe3+/Sn4+ Co-Doped Titanium Dioxide Nano-Crystalline Thin Films for Methyl Orange Degradation

2007 ◽  
Vol 336-338 ◽  
pp. 1956-1959
Author(s):  
Yun Ping Di ◽  
Wen Li Zhang ◽  
Li Hua Xu ◽  
Chang An Wang ◽  
Ren Bin Shi
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Catalytic Activity ◽  
Methyl Orange ◽  
Sol Gel ◽  
Dip Coating ◽  
Photo Catalytic Activity ◽  
Nano Crystalline ◽  
Co Doped ◽  
Degradation Of Methyl Orange

The uniform and transparent nano-crystalline thin films of pure and co-doped with Fe3+/Sn4+ titanium dioxide photo-catalysts were prepared via sol-gel dip-coating process, and were loaded firmly on the surface of glass substrates. The structure and surface morphology of films were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). In particular, the photo-catalytic activity of films was measured by ultraviolet-visible (UV-VIS) spectrophotometer. Methyl orange was used as a model compound to study the photo-catalytic activity of films. The effects of the concentrations of doping ions and the number of layers on photo-catalytic degradation of methyl orange solutions were investigated. Experimental results showed clearly that the co-doping of iron and tin ions exhibited a synergistic effect, which increased significantly the photo-catalytic activity of titanium dioxide. Especially, the photo-catalytic activity of nano-crystalline titanium dioxide thin films co-doped with 0.1 mol%Fe3+ and 11.41mol%Sn4+ was 2.0 times higher than that of those un-doped for photo-degradation of methyl orange solutions under the 125W self-ballasted fluorescent high-pressure mercury lamp irradiation.

scholarly journals Remarkable Catalytic Activity of CMC/BiFeO3 Nanocomposite Film for the Degradation of Methyl Orange Under Direct Sunlight Radiation

2019 ◽  
Vol 30 (Supp.2) ◽  
pp. 23-40
Author(s):  
Nor Atilia Athira Zaahari ◽  
◽  
Teo Leong Huat ◽  
Noor Haida Mohd Kaus ◽  
Mohamad Haafiz Mohamad Kassim ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methyl Orange ◽  
Nanocomposite Film ◽  
Direct Sunlight ◽  
Degradation Of Methyl Orange ◽  
Sunlight Radiation

scholarly journals Preparation of TiO2 nanorods by Sol–Gel template method and measured its photo- catalytic activity for degradation of methyl orange

2019 ◽  
Vol 13 (26) ◽  
pp. 171-177
Author(s):  
Ban M. Al-Shabander
Keyword(s):  
Methyl Orange ◽  
Sol Gel ◽  
Tio2 Nanorods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Photo Catalytic Activity ◽  
Atomic Force ◽  
Degradation Of Methyl Orange ◽  
Titanium Dioxide Nanorods

Titanium dioxide nanorods have been prepared by sol-gel templatemethod. The structural and surface morphology of the TiO2 nanorods wasinvestigated by X-ray diffraction (XRD) and atomic force microscopy(AFM), it was found that the nanorods produced were anatase TiO2 phase.The photocatalytic activity of the TiO2 nanorods was evaluated by thephoto degradation of methyl orange (MO). The relatively higherdegradation efficiency for MO (D%=78.2) was obtained after 6h of exposedto UV irradiation.

BiOCl/TiO2 composite photocatalysts synthesized by the sol–gel method for enhanced visible-light catalytic activity toward methyl orange

2020 ◽  
Vol 35 (22) ◽  
pp. 3067-3078
Author(s):  
Xiaofei Qu ◽  
Xiaohui Zhao ◽  
Meihua Liu ◽  
Zhaoqun Gao ◽  
Donglin Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Photocatalysts

Abstract

Controlled synthesis and enhanced photoelectro-catalytic activity of a 3D TiO2 nanotube array/TiO2 nanoparticle heterojunction using a combined dielectrophoresis/sol–gel method

2019 ◽  
Vol 7 (17) ◽  
pp. 4981-4987 ◽  
Author(s):  
Ruiyu Bao ◽  
Chen Chen ◽  
Jianxin Xia ◽  
Huiying Chen ◽  
Hua Li
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Surface Morphology ◽  
Sol Gel ◽  
Tio2 Nanoparticle ◽  
Controlled Synthesis ◽  
Tio2 Nanotube Array ◽  
Nanotube Array ◽  
Gel Method ◽  
Sol Gel Method

The surface morphology and particle size of materials can be controlled using DEP technology.

Substituted Co–Cu–Zn nanoferrites: synthesis, fundamental and redox catalytic properties for the degradation of methyl orange

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1360-1375 ◽  
Author(s):  
Santosh Bhukal ◽  
Manisha Dhiman ◽  
S. Bansal ◽  
Mukesh K. Tripathi ◽  
Sonal Singhal
Keyword(s):  
Methyl Orange ◽  
Catalytic Properties ◽  
Sol Gel ◽  
Combustion Method ◽  
Auto Combustion ◽  
Recyclable Catalysts ◽  
Degradation Of Methyl Orange

Co0.6Zn0.4Cu0.2MxFe1.8−xO4 (M = Zn2+, Co2+, Ni2+ and Mn3+. x = 0.2, 0.4, 0.6 and 0.8) magnetically recyclable catalysts have been synthesized via a sol–gel auto combustion method.

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