Study on Synthesis and Characterization of Cu-Ni Doped TiO2 by Sol-Gel Hydrothermal

Titania (TiO2) as a semiconductor has been intensively studied during the last decades. Regardless of its superior photocatalytic performance and extensive environmental applications, it has a wide bandgap which lead to a photocatalytic activity only in ultraviolet (UV) irradiation. To shift the activity of TiO2 to visible region, a series of monometallic and bimetallic doped TiO2 was prepared with 10wt% total metals loading. The photocatalysts were synthesized by sol-gel associated via hydrothermal method. The properties of the photocatalysts such as crystal size, surface morphology, total surface area, chemical state of the elements, and bandgap were investigated by using thermogravimetric analysis (TGA), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and Brunauer–Emmett–Teller (BET) measurement. XRD analysis showed that all samples displayed anatase (101) as a main phase of TiO2 with average crystal size between 10-16 nm in a good agreement with the TEM results. The FESEM images show spherical particles less than 20 nm in size. The BET results indicated that all samples are mesoporous. The band gap of Ni-Cu/TiO2 is reduced to 2.65 eV with more absorbance in the visible region compared to those of cu/TiO2 and Ni/TiO2.

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Study on Synthesis and Characterization of Cu-Ni Doped TiO2 by Sol-Gel Hydrothermal

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.925.248 ◽

2014 ◽

Vol 925 ◽

pp. 248-252 ◽

Cited By ~ 1

Author(s):

Robabeh Bashiri ◽

Muti Mohamed Norani ◽

Chong Fai Kait ◽

Suriati Sufian

Keyword(s):

Crystal Size ◽

Sol Gel ◽

Visible Region ◽

Xrd Analysis ◽

Total Surface Area ◽

Spherical Particles ◽

X Ray Diffraction ◽

Metals Loading ◽

20 Nm

Titania (TiO2) as a semiconductor has been intensively studied during the last decades. Regardless of its superior photocatalytic performance and extensive environmental applications, it has a wide bandgap which lead to a photocatalytic activity only in ultraviolet (UV) irradiation. To shift the activity of TiO2 to visible region, a series of monometallic and bimetallic doped TiO2 was prepared with 10wt% total metals loading. The photocatalysts were synthesized by sol-gel associated via hydrothermal method. The properties of the photocatalysts such as crystal size, surface morphology, total surface area, chemical state of the elements, and bandgap were investigated by using thermogravimetric analysis (TGA), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and BrunauerEmmettTeller (BET) measurement. XRD analysis showed that all samples displayed anatase (101) as a main phase of TiO2 with average crystal size between 10-16 nm in a good agreement with the TEM results. The FESEM images show spherical particles less than 20 nm in size. The BET results indicated that all samples are mesoporous. The band gap of Ni-Cu/TiO2 is reduced to 2.65 eV with more absorbance in the visible region compared to those of cu/TiO2 and Ni/TiO2.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.977.59 ◽

2014 ◽

Vol 977 ◽

pp. 59-62 ◽

Cited By ~ 1

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/□.

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Synthesis and Characterization of Ni2+-doped SnO2 Powders

VNU Journal of Science Mathematics - Physics ◽

10.25073/2588-1124/vnumap.4356 ◽

2019 ◽

Vol 35 (4) ◽

Author(s):

Trinh Thi Loan ◽

Nguyen Ngoc Long

Keyword(s):

Oxygen Vacancies ◽

Sol Gel ◽

Xrd Analysis ◽

Near Band Edge ◽

X Ray Diffraction ◽

Violet Emission ◽

Dopant Content ◽

X Ray ◽

Undoped Sno2

The SnO2:Ni2+ powders with dopant contents ranging from 0.0 to 12 mol% have been synthesized by sol-gel method. The samples were characterized by X-ray diffraction (XRD) Raman spectroscopy, energy-dispersive X-ray spectrometer (EDS) and photoluminescense (PL) spectra. XRD analysis showed that samples doped with low Ni- concentrations exhibited single SnO2 crystalline phase, whereas the samples with high Ni- concentrations exhibited a mixture of SnO2 and NiO phases. The lattice parameters of the SnO2 host were independent on Ni2+ dopant content, while Raman mode positions were dependenton Ni2+ dopant content. The PL spectrum of the undoped SnO2 was characterized by the emission peaks due to near band edge (NBE) emission and the violet emission peaks associated with surface dangling bonds or oxygen vacancies and Sn interstitials.

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Bioglasses in the SiO2-CaO-P2O5 System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.1063 ◽

2008 ◽

Vol 47-50 ◽

pp. 1063-1066 ◽

Cited By ~ 1

Author(s):

Costel Birsan ◽

Cristina Ghitulica ◽

Ecaterina Andronescu ◽

Cristina Ionita ◽

Mihaela Birsan

Keyword(s):

Body Fluid ◽

Sol Gel ◽

Xrd Analysis ◽

Silica Content ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

X Ray ◽

Physiological Serum ◽

P2o5 System

The aim of the study was the synthesis and characterization of bioactive osteoinductive glasses, in the SiO2 – CaO – P2O5 system. In order to maintain the bioactive character of bioglasses, for SiO2 contents higher than 60%, the sol – gel method was used for preparation. On the obtained powders, thermal, grain size and X - ray diffraction analysis were performed. The X - ray diffraction emphasized the formation of phosphate phases, whose proportion decreases as the silica content is increased. Later, the powders were thermally treated at temperatures between 1000 and 14000C, the phase composition evolution being monitored through XRD analysis. On the powder suspensions in physiological serum, the evolution of pH was investigated, in order to establish the chemical stability. The behavior of the obtained powders in physiological medium was studied, by immersing samples in simulated body fluid and excerpted after different periods of time.

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Undoped and Eu3+ Doped Magnesium-Aluminium Layered Double Hydroxides: Peculiarities of Intercalation of Organic Anions and Investigation of Luminescence Properties

Materials ◽

10.3390/ma12050736 ◽

2019 ◽

Vol 12 (5) ◽

pp. 736 ◽

Cited By ~ 3

Author(s):

Aurelija Smalenskaite ◽

Lina Pavasaryte ◽

Thomas Yang ◽

Aivaras Kareiva

Keyword(s):

Layered Double Hydroxides ◽

Organic Anion ◽

Sol Gel ◽

Xrd Analysis ◽

X Ray Diffraction ◽

X Ray ◽

Organic Guests ◽

Double Hydroxides ◽

Scanning Electron

The Mg3/Al and Mg3/Al0.99Eu0.01 layered double hydroxides (LDHs) were fabricated using a sol-gel chemistry approach and intercalated with different anions through ion exchange procedure. The influence of the origin of organic anion (oxalate, laurate, malonate, succinate, tartrate, benzoate, 1,3,5-benzentricarboxylate (BTC), 4-methylbenzoate (MB), 4-dimethylaminobenzoate (DMB) and 4-biphenylacetonate (BPhAc)) on the evolution of the chemical composition of the inorganic-organic LDHs system has been investigated. The obtained results indicated that the type and arrangement of organic guests between layers of the LDHs influence Eu3+ luminescence in the synthesized different hybrid inorganic–organic matrixes. For the characterization of synthesis products X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, fluorescence spectroscopy (FLS), and scanning electron microscopy (SEM), were used.

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Synthesis and Characterization of MgPSZ-PMMA Composite by Sol-Gel Modification and Direct Foaming Technique Using Egg Whites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.720.290 ◽

2016 ◽

Vol 720 ◽

pp. 290-295

Author(s):

Veni Takarini ◽

Alfend Rudyawan ◽

Andri Hardiansyah ◽

Rifki Septawendar ◽

Niki Prastomo ◽

...

Keyword(s):

Electron Microscope ◽

Crystal Size ◽

Sol Gel ◽

Porous Structures ◽

X Ray Diffraction ◽

X Ray ◽

Direct Foaming ◽

Transmission Electron ◽

Direct Foaming Method

This study prepared Magnesium-Partially Stabilized Zirconia (Mg-PSZ) filler synthesis and direct foaming technique using egg whites, and impregnated by PMMA. The results were evaluated systematically by X-ray diffraction (XRD), Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM). XRD results denote that the powder sample of MgPSZ was successfully formed with various crystal size of tetragonal and monoclinic phase. SEM and TEM observations revealed that nanoparticles MgPSZ were in spherical and long rounded shapes. Furthermore, SEM observation revealed that the direct foaming method were also successful in the formation of porous structures which favourable for impregnation process by PMMA. The use of egg whites as a polymer precursor in both methods demonstrates that porous specimens contained nanosized, predominantly tetragonal, Mg-PSZ powders were successfully synthesized. This shall yield an interesting prospect towards cheap, reliable, and biocompatible product to resemble the modulus elasticity of dentin.

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Fabrikasi Nanotubes Titanium Dioksida (TiO2) Menggunakan Metode Hidrotermal

Jurnal Kimia VALENSI ◽

10.15408/jkv.v3i1.5036 ◽

2017 ◽

Vol 3 (1) ◽

pp. 20-26

Author(s):

Atik Setyani ◽

Emas Agus Prastyo Wibowo

Keyword(s):

Tio2 Nanoparticles ◽

Tio2 Nanotubes ◽

Crystal Size ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron

Nanotubes received great attention because it has a high surface area. In this study, TiO2 nanotubes fabricated via hydrothermal method from synthesis of TiO2 nanoparticles via sol-gel method. Catalysts that have been synthesized later in the characterization by X-Ray Diffraction (XRD) to obtain the crystal size and crystallinity. Crystal size of TiO2 nanoparticles at a temperature of 450C is 13.78 nm. Then characterized by Transmission Electron Microscopy (TEM) to look at the formation of nanotubes. Characterization of TiO2 nanotubes with TEM shows that the structure of the tubes had already been formed TNTs although the growth has not been perfect. It can be seen from the structure TNTs who tend to be short and yet so irregular.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5036

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Synthesis and Characterization of Lead Free Calcium Bismuth Titanate (Ca0.25Bi0.5 TiO3) Piezoelectric Ceramics

Journal of Applied and Emerging Sciences ◽

10.36785/buitems.jaes.316 ◽

2019 ◽

pp. 161-164

Keyword(s):

Bismuth Titanate ◽

Sol Gel ◽

Piezoelectric Ceramics ◽

Xrd Analysis ◽

Free Calcium ◽

X Ray Diffraction ◽

Toxic Heavy Metals ◽

Sem Images ◽

Photocatalytic Removal

Bismuth layer-structured piezoelectric (BLSP) calcium bismuth titanate (Ca0.25Bi0.5TiO3) piezoelectric ceramics have been prepared via a conventional sol gel reaction method by mixing the desired chemicals in stoichiometric amounts. Calcium bismuth titanate (CBT) samples were characterized by means of XRD, SEM and FTIR spectroscopy. X-ray diffraction (XRD) analysis revealed that CBT ceramics exhibit a single phase orthorhombic structure. The SEM images confirm its morphological size ranging from 1.00 to 2.75 µm. FTIR analysis reveals that calcium bismuth titanate has been prepared successfully, and the ratio of calcium, bismuth and titania was found to be 0.25:0.50:1.00, respectively. The photocatalytic removal of Methylene Blue, cadmium (Cd2+) and other toxic heavy metals will be carried out using CBT materials.

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Synthesis and characterization of an experimental 3Y-TZP dental ceramic prepared by polymeric precursors method

Research Society and Development ◽

10.33448/rsd-v9i10.9123 ◽

2020 ◽

Vol 9 (10) ◽

pp. e7919109123

Author(s):

Fabíola Stahlke Prado ◽

Tânia Cristina Simões ◽

Alejandra Hortencia Miranda González

Keyword(s):

Precursor Solution ◽

Xrd Analysis ◽

Sem Analysis ◽

Spherical Particles ◽

Morphological Properties ◽

Dental Ceramics ◽

X Ray Diffraction ◽

Derivative Thermogravimetry ◽

Thermally Treated

The aim of the investigation was to synthesize 3 mol% yttria-stabilized zirconia (3Y-TZP) powders via polymeric precursor method (PPM). The precursor solution was preheated at 350ºC for 3h, subsequently thermally treated at 500ºC for 3h and 800ºC for 6h. The obtained materials were analyzed by Thermogravimetry-Derivative Thermogravimetry (TG/DTG), Differential Thermal Analysis (DTA), powder X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Two commercially available Y-TZP ceramic systems were chosen for comparison. XRD analysis of the synthesized 3Y-TZP powders revealed the crystallization of the tetragonal phase, while both commercial systems showed the coexistence of the monoclinic and tetragonal phases. SEM analysis showed that the powders thermally treated at 800°C consist of agglomerated spherical nanoparticles. Morphology of commercial systems also revealed nanosized spherical particles. Results revealed that the PPM led to ceramics with structural and morphological properties comparable to commercially available reinforced dental ceramics.

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SYNTHESIS AND CHARACTERIZATION OF Fe2O3 NANOPARTICLES USING Averrhoa bilimbi AS BIOMATERIAL CHELATING AGENT FOR NANOFLUIDS APPLICATION

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.13.2.4348.133-146 ◽

2017 ◽

Vol 13 (2) ◽

pp. 133 ◽

Cited By ~ 1

Author(s):

Arie Hardian ◽

Alvi Aristia Ramadhiany ◽

Dani Gustaman Syarif ◽

Senadi Budiman

Keyword(s):

Calcination Temperature ◽

Sol Gel ◽

Chelating Agent ◽

Xrd Analysis ◽

Solid Particles ◽

X Ray Diffraction ◽

Calcination Temperatures ◽

Basic Fluid ◽

Sol Gel Synthesis

The aim of this work was to determine the effect of calcination temperature on the characteristics of Fe2O3 nanoparticles (NPs) in sol-gel synthesis. The obtained Fe2O3 NPs was then used as material for preparation of Fe2O3-water nanofluids. Nanofluids is a mixture between basic fluid like water and 1 - 100 nm solid particles (nanoparticles). Nanoparticles of Fe2O3 have been synthesized from the local mineral Jarosite using sol-gel method by using starfruit (Averrhoa bilimbi) extracts as the chelating agent. The calcination temperature was then varied from 500 ºC to 700 ºC for 5 hours. Based on the X-Ray Diffraction (XRD) analysis, the diffraction pattern of obtained Fe2O3 was relevant with the JCPDS data No. 33-0664 for α-Fe2O3 with hexagonal crystallite system. The crystallite size (Scherrer’s Equation) of obtained α-Fe2O3 nanoparticles at calcination temperatures of 500 ºC, 600 ºC and 700 ºC was 50 nm, 48 nm and 40 nm, respectively. The Surface Area of Fe2O3 NPs at temperature of 500 ºC, 600 ºC and 700 ºC was 45.45 m2/g; 26.91 m2/g and 17.51 m2/g, respectively. Fe2O3-water nanofluids was relativly stable with zeta potential of -39.60 mV; -46.37 mV and -41.57 mV, respectively for 500 ºC, 600 ºC and 700 ºC calcination temperature. The viscosity of Fe2O3-water nanofluids was higher than the viscosity of water. The critical heat flux (CHF) value of water-Fe2O3 nanofluids was higher than the CHF water. The highest CHF value for nanofluids was obtained by using α-Fe2O3 nanoparticles with calcination temperature of 600 ºC which 34.99 % of increment compare to the base fluid (water).

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