Sol–gel preparation, structural, thermal and spectroscopic analyses, and opto-electronic and photocatalytic activities of normal spinel nickel cobaltite nano-powder for photo-degradation of Reactive Red RB

Iron doped TiO2 nanoparticles with different doping amounts were prepared using sol–gel method and characterized. These materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR). Photocatalytic activities of the supported catalysts were examined for decolorization processes of methyl orange (MO) solution under UV irradiation. The results showed that doping of Fe3+ enhanced the photocatalytic activity of TiO2/HZSM-5, and the optimum Fe3+ doping of Fe/Ti mole ratio for TiO2/HZSM-5 was 0.07%. Doping of Fe3+ did not change the surface morphology of TiO2/HZSM-5. The Fe3+-doped TiO2/HZSM-5 possessed the anatase structures and Ti-O-Si bonds did not form between the HZSM-5 bulk and the supported TiO2.

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Effect of Surface Fluorination on Photocatalytic Activity of Titania Nano-Powder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.979.115 ◽

2014 ◽

Vol 979 ◽

pp. 115-118 ◽

Cited By ~ 2

Author(s):

Itsarapong Chuasontia ◽

Khanitta Hathaisamit ◽

Sayan Putwat

Keyword(s):

Photocatalytic Activity ◽

Irradiation Time ◽

Sol Gel ◽

Titanium Tetraisopropoxide ◽

Photo Degradation ◽

Grain Sizes ◽

Nano Powder ◽

Gel Technique ◽

Surface Fluorination ◽

Effect Of Surface

This work, surface fluorination process was used for improvement photocatalytic activity of TiO2. Photocatalytic activity was observed by degradation of methylene blue (MB). TiO2 nanopowders were prepared by sol-gel technique from titanium-tetraisopropoxide (TTIP): 2-propanal (2-PP) with the ratios of 1:5, 1:15, and 1:30 (V/V) then adjusted pH by nitric acid at 2. The result showed that grain size of TiO2 powder decreased as 2-PP ratio increase. The grain sizes of TiO2 were in the range of 14-25 nm. Photocatalytic activity was considered by characteristic time constant. The results showed that F-TiO2 presented higher photo-degradation than naked TiO2. At 1:30 for TTIP: 2-PP ratio with improvement by surface fluorination (F-TiO2) could degrade MB faster than other samples under weak-UV at irradiation time of 1 hr. The 1:30 sample degraded MB reach to 96%. The results led to conclude that surface fluorination is the good process to improve photocatalytic activity for TiO2.

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Efficient Micromixing for Continuous Biodiesel Production from Jatropha Oil

Nanoscience &Nanotechnology-Asia ◽

10.2174/2210681207666170718160304 ◽

2018 ◽

Vol 9 (1) ◽

pp. 133-139

Author(s):

Waleed S. Mohammed ◽

Ahmed H. El-Shazly ◽

Marwa F. Elkady ◽

Masahiro Ohshima

Keyword(s):

Methyl Esters ◽

Continuous Process ◽

Sol Gel ◽

Average Diameter ◽

Biodiesel Production ◽

High Mass ◽

Molar Ratio ◽

Jatropha Oil ◽

Energy Deficiency ◽

Gel Preparation

Introduction: The utilization of biodiesel as an alternative fuel is turning out to be progressively famous these days because of worldwide energy deficiency. The enthusiasm for utilizing Jatropha as a non-edible oil feedstock is quickly developing. The performance of the base catalyzed methanolysis reaction could be improved by a continuous process through a microreactor in view of the high mass transfer coefficient of this technique. Materials & Methods: Nanozirconium tungstovanadate, which was synthetized using sol-gel preparation method, was utilized in a complementary step for biodiesel production process. The prepared material has an average diameter of 0.066 &µm. Results: First, the NaOH catalyzed methanolysis of Jatropha oil was investigated in a continuous microreactor, and the efficient mixing over different mixers and its impact on the biodiesel yield were studied under varied conditions. Second, the effect of adding the nanocatalyst as a second stage was investigated. Conclusion: The maximum percentage of produced methyl esters from Jatropha oil was 98.1% using a methanol/Jatropha oil molar ratio of 11 within 94 s using 1% NaOH at 60 &°C. The same maximum conversion ratio was recorded with the nanocatalyst via only 0.3% NaOH.

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PERFORMANCE OF TUNGSTEN OXIDE DOPED TITANIA via SOL-GEL PROCESS FOR PHOTO-DEGRADATION OF TRANS-CINNAMIC ACID

Journal of industrial technology ◽

10.21908/jit.2016.6 ◽

2016 ◽

Vol 24 (1) ◽

pp. 75-86

Author(s):

Y.N. Tan ◽

◽

A.H.A. Malek ◽

M.Z.A. Malek ◽

M.T. Zainuddin ◽

...

Keyword(s):

Tungsten Oxide ◽

Cinnamic Acid ◽

Sol Gel ◽

Photo Degradation ◽

Sol Gel Process ◽

Doped Titania

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Sol-gel preparation and properties of electroconductive Sn–Al co-doped ZnO coated TiO2 whisker and its applications in textiles

Materials Science in Semiconductor Processing ◽

10.1016/j.mssp.2020.105607 ◽

2021 ◽

Vol 124 ◽

pp. 105607

Author(s):

Ziao Xu ◽

Yanan Zhu ◽

Zengyuan Pang ◽

Mingqiao Ge

Keyword(s):

Sol Gel ◽

Doped Zno ◽

Gel Preparation ◽

Co Doped

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Chemical and Structural Characterization of Amorphous and Crystalline Alumina Obtained by Alternative Sol–Gel Preparation Routes

Materials ◽

10.3390/ma14071761 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1761

Author(s):

Izabela Rutkowska ◽

Jakub Marchewka ◽

Piotr Jeleń ◽

Mateusz Odziomek ◽

Mateusz Korpyś ◽

...

Keyword(s):

Infrared Spectroscopy ◽

Aluminum Oxide ◽

Physicochemical Properties ◽

Sol Gel ◽

Magic Angle Spinning ◽

Magic Angle ◽

Bet Method ◽

Gel Preparation ◽

Angle Spinning ◽

Middle Infrared

Aluminum oxide is one of the most commonly used materials in the industry. It is used in the field of catalysis, refractories, and optics. Despite the fact that there are many techniques available, there is still a great challenge in obtaining a material with desired and designed properties. Nevertheless, there is a great flexibility in making customized alumina materials with desired physicochemical properties synthesized by sol–gel methods. This work consists in characterizing the physicochemical properties of sol–gel synthesized aluminum oxide using different sol–gel preparation routes. Three different sols were obtained by using organic precursors and underwent thermal treatment. The structure (Middle Infrared Spectroscopy, Diffused Reflectance Infrared Spectroscopy, X-ray Diffraction, Magic Angle Spinning Nuclear Magnetic Resonance) and microstructure (Scanning Electron Microscopy with Electron Dispersive Spectroscopy) tests of the materials were carried out. The specific surface area was determined by using the Brunauer–Emmett–Teller (BET) method. Thermal analysis was performed for all the powders, in order to analyze the specific temperature of materials transformation.

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