Preparation and Characterization of Fe3+-Doped TiO2/Diatomite Composite

2012 ◽  
Vol 268-270 ◽  
pp. 15-18 ◽  
Author(s):  
Lu Sun ◽  
Jun Xiong Lin ◽  
Lan Wang ◽  
Kai Xin Song
Keyword(s):  
Absorption Edge ◽  
Light Absorption ◽  
Sol Gel ◽  
Titanium Isopropoxide ◽  
Optimum Concentration ◽  
Bet Surface Area ◽  
Composite Catalyst ◽  
Composite Photocatalyst ◽  
Precursor Material

Fe3+-doped TiO2/diatomite composite photocatalyst were prepared by sol-gel method with titanium isopropoxide used as precursor material. The samples were characterized by SEM, XRD, XPS, BET surface area analysis and UV-Vis techniques. The results showed that the optimum concentration of Fe3+ in the composite catalyst was 0.2wt% when the quantity of TiO2 loaded on the diatomite was 30.3wt%. Compared with the un-doped photocatalyst, the Fe3+-doped sample exhibited red shifts of absorption edge and significant enhancement of light absorption at 400～600 nm.

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.

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 pharmaceutical antibiotic (ciprofloxacin) by photocatalysis process using sol-gel based titanium dioxide nanoparticles

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nitesh Parmar ◽  
Jitendra Kumar Srivastava
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide Nanoparticles ◽  
Sol Gel ◽  
Operating Cost ◽  
Titanium Isopropoxide ◽  
Photocatalytic Process ◽  
Photocatalytic Reactor ◽  
Prepared Material ◽  
Maximum Removal

Abstract This study is an attempt to the removal of Ciprofloxacin (CIP) antibiotic from simulated wastewater using a photocatalytic process. The photocatalytic process was carried out in a photocatalytic reactor in the presence of TiO2 nanoparticles. TiO2 nanoparticles were successfully prepared in a laboratory scale using sol-gel method with titanium-isopropoxide (TTIP) as titanium precursor. Prepared material was found very effective to the removal of CIP antibiotic. The maximum removal efficiency of 87.95% of ciprofloxacin from aqueous solution was achieved at the pH 5, catalyst doze of 40 mg L−1 with initial concentration of ciprofloxacin 5 mg L−1, and the reaction time of 100 min additionally; material characterization of TiO2 was presented in detail in terms of XRD, SEM, UV, and FTIR. It has been found that at the optimum condition the total operating cost indicated for the removal of ciprofloxacin from aqueous solution is 786.56 (INR/kg of CIP removal). This technique demonstrated that photocatalytic reaction in presence of TiO2 nanoparticles is well applicable to treat pharmaceutical wastewater.

Synthesis and Characterization of Fluorine-Doped Tin Oxide Nanocrystals Prepared by Sol-Gel Method

2014 ◽  
Vol 977 ◽  
pp. 59-62 ◽  
Author(s):  
Jun Qing Tian ◽  
Hai Ying Shi ◽  
Wei Zheng
Keyword(s):  
Tin Dioxide ◽  
Sol Gel ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Hall Effect Sensor ◽  
Precursor Material ◽  
20 Nm

Fluorine-doped tin dioxide (FTO) nanocrystals were prepared with sol–gel method using SnCl4·5H2O and NH4F as precursor material. The FTO was characterized with X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Differential Thermal Analysis and Thermal Grativity (DTA-TG) and Infrared Radiation (IR) respectively. The electrical property was measured with Hall Effect Sensor. The result of XRD and SEM shows that FTO nanocrystal size is about 20 nm and the dimension of the grain is about 300 nm. IR spectrum analysis proves fluorine doping. The crystal phase transformation was discussed with DTA-TG curve. When the sintering temperature is 450°C, the sintering time is 60 min, and the molar ratio of F to Sn is 2:10, the sheet resistance of FTO film is 107Ω/□.

Sol-Gel Synthesis of Nanocrystalline Ni-Ferrite and Co-Ferrite Redox Materials for Thermochemical Production of Solar Fuels

2014 ◽  
Vol 1675 ◽  
pp. 203-208 ◽  
Author(s):  
Rahul R. Bhosale ◽  
Ivo Alxneit ◽  
Leo L. P. van den Broeke ◽  
Anand Kumar ◽  
Mehak Jilani ◽  
...  
Keyword(s):  
Sol Gel ◽  
Solar Fuels ◽  
Bet Surface Area ◽  
Mixed Solution ◽  
Gel Formation ◽  
Thermochemical Cycles ◽  
X Ray ◽  
Thermogravimetric Analyzer ◽  
Sol Gel Synthesis

ABSTRACTIn this contribution, we report the synthesis and characterization of NixFe3-xO4 and CoxFe3-xO4 redox nanomaterials using sol-gel method. These materials will be used to produce solar fuels such as H2 or syngas from H2O and/or CO2 via solar thermochemical cycles (STCs). For the sol-gel synthesis of ferrites, the Ni, Co, Fe precursor salts were dissolved in ethanol and propylene oxide (PO) was added dropwise to the well mixed solution as a gelation agent to achieve gel formation. Freshly synthesized gels were aged, dried, and calcined by heating them to 600°C in air. The calcined powders were characterized by powder x-ray diffractometer (XRD), BET surface area, as well as scanning (SEM) and transmission (TEM) electron microscopy. Their suitability to be used in STCs for the production of solar fuels was assessed by performing several reduction/re-oxidation cycles using a thermogravimetric analyzer (TGA).

scholarly journals Synthesis and Characterization of Titania-Rice Husk Silica Composites as Photocatalyst

2015 ◽  
Vol 15 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Posman Manurung ◽  
Rudy Situmeang ◽  
Ediman Ginting ◽  
Indra Pardede
Keyword(s):  
Rice Husk ◽  
Sol Gel ◽  
Bet Surface Area ◽  
Synthesis And Characterization ◽  
Ultraviolet Rays ◽  
X Ray Diffraction ◽  
Titanium Butoxide ◽  
X Ray ◽  
Scanning Electron

This article describes the synthesis of titania-silica composites by a sol-gel method using a mixture of silica of rice husk and titanium butoxide sols. Microstructures were examined at calcination temperature in the range of 500 to 700 °C, with temperatures interval of 50 °C. The sintered catalysts were subsequently tested for photodegradation of methylene blue (MB) under ultraviolet and sunlight rays. Physical characteristics were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive X-ray spectroscopy (EDS), and Brunauer-Emmett-Teller (BET). The XRD results did not show the presence of silica crystal phase in each sample. The results showed that the highest BET surface area of samples was obtained at the temperature of 650 °C. In sample calcined 500 °C, the activity of the catalyst on MB was relatively similar in both sunlight and ultraviolet rays.

Synthesis and Characterization of Green Porous Carbons with Large Surface Area by Two Step Chemical Activation with KOH

2014 ◽  
Vol 67 (4) ◽  
Author(s):  
Noor Shawal Nasri ◽  
Mohammed Jibril ◽  
Muhammad Abbas Ahmad Zaini ◽  
Rahmat Mohsin ◽  
Hamza Usman Dadum ◽  
...  
Keyword(s):  
Surface Area ◽  
Porous Carbon ◽  
Pore Volume ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Bet Surface Area ◽  
Porous Carbons ◽  
Precursor Material ◽  
Proximate And Ultimate Analysis

Porous carbons were synthesized from coconut shell using chemical activation by potassium hydroxide (KOH). N2 adsorption isotherm analysis for BET surface area and pore volume of the synthesized porous carbon were carried out. The Langmuir surface area, BET surface area and pore volume are 1646 m2/g, 1353 m2/g and 0.6 cm3/g, respectively. From the FTIR analysis, hydroxyls, alkenes, carbonyls and aromatics functional groups were identified. The proximate and ultimate analysis shows high percentage of carbon and less ash content which indicates a good precursor material for porous carbon. The carbonization temperature and time were also varied to observe their effect on the yield of char, with carbonization at 7000C for 2 h having highest yield of 32%.

scholarly journals Synthesis and Characterization of Cu-Doped Zirconium Titanate as A Potential Visible-Light Responsive Photocatalyst

2019 ◽  
Vol 19 (3) ◽  
pp. 761
Author(s):  
Katarina Rachma Andita ◽  
Rian Kurniawan ◽  
Akhmad Syoufian
Keyword(s):  
Visible Light ◽  
Absorption Edge ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Bandgap Energy ◽  
Zirconium Titanate ◽  
Titanium Tetraisopropoxide ◽  
Gel Method ◽  
Cu Content

Synthesis and characterization of Cu-doped zirconium titanateas a potential visible-light responsive photocatalyst had been conducted. Titanium tetraisopropoxide (TTIP) was used as a precursor of Ti source, reacted to ZrO2 powderand CuSO4·5H2O with various Cu concentrations of 0, 1, 3, 5, 7 and 9% (w/w) by sol-gel method. Zirconium titanate with Cu concentration of 5% was calcined at various temperatures of 500, 700 and 900 °C. All materials were characterized by using XRD, FTIR, SRUV, and SEM-EDX. The characterization proved that the materials were potential as a model of visible-light responsive photocatalyst. Composite with optimum bandgap energy (Eg) was obtained at 5% Cu content after 500 °C with an absorption edge wavelength of 431.93 nm and the bandgap of 2.87 eV.

scholarly journals Synthesis and Characterization of TiO2-CaO and TiO2-CaO-Fe2O3 Photocatalyst for Removal of Catechol

Molekul ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 140
Author(s):  
Candra Yulius Tahya ◽  
Wahyu Irawati ◽  
Karnelasatri Karnelasatri ◽  
Friska Juliana Purba
Keyword(s):  
Surface Area ◽  
Adsorption Property ◽  
Average Pore Size ◽  
Sol Gel ◽  
Bet Surface Area ◽  
Sem Images ◽  
Average Pore ◽  
Xrd Pattern ◽  
Two Peaks

TiO2-CaO and TiO2-CaO-Fe2O3 photocatalysts have been synthesized through the surfactant-assisted sol-gel method. The catalysts were characterized using XRD, FTIR, SEM-ED Sand BET surface area. XRD pattern showed the formation of anatase TiO2 crystal phase both in TiO2-CaO and TiO2-CaO-Fe2O3. The TiO2-CaO has higher crystallinity than TiO2-CaO-Fe2O3. Based on the peak refinement using Rietveld, there are two peaks identified as Fe2O3 hematite in the sample TiO2-CaO-Fe2O3.  BET surface area analysis showed that the average pore size of TiO2-CaO and TiO2-CaO-Fe2O3 catalysts are 8.04 and 8.41 nm respectively, indicating both catalysts are mesoporous.FTIR spectra show that the vibration of Ti-O, Ca-O, and Ca-TiO2 were observed in both catalysts. SEM images confirm that both catalysts are porous material. The catechol removal using TiO2-CaO and TiO2-CaO-Fe2O3 improved with the increase of catalyst concentration. After 360 minutes of UV radiation, the removal of catechol using TiO2-CaO-Fe2O3 reached 46.0%, 48.3%, and 69.2%, while when using TiO2-CaO, it reached 22.1%, 36.8%, and 57.0% for 0.1 g, 0.15 g, and 0.2 g of catalysts, respectively. The photocatalytic activity of TiO2-CaO-Fe2O3 is not so strong compared to TiO2-CaO catalyst but the catechol adsorption property of TiO2-CaO-Fe2O3 is higher than that of TiO2-CaO catalyst.

Sign in / Sign up

Export Citation Format

Share Document