scholarly journals Preparation and Photocatalytic Properties of TiO2-Al2O3Composite Loaded Catalysts

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jianzhong Pei ◽  
Weisi Ma ◽  
Rui Li ◽  
Yanwei Li ◽  
Hongzhao Du
Keyword(s):  
Titanium Dioxide ◽  
Electron Microscope ◽  
Degradation Rate ◽  
Experimental Approach ◽  
Sol Gel ◽  
Photocatalytic Effect ◽  
Degradation Rates ◽  
Nanometer Titanium Dioxide ◽  
Catalytic Effects ◽  
Scanning Electron

This paper presents an experimental approach to study catalytic effects of Fe3+modified nanometer titanium dioxide (TiO2) loaded on aluminium oxide (Al2O3). Sol-gel method was used to prepare modified TiO2loaded on carrier. Purification tests were conducted in a self-developed instrument to study catalytic effects of TiO2loaded on Al2O3with different contents through degradation rate. The modification mechanism was studied by scanning electron microscope (SEM). Results showed that loading on Al2O3improved photocatalytic effect of TiO2modified with Fe3+. The best photocatalytic effect was achieved under catalytic action of Al2O3loaded with 10% TiO2composite; the degradation rates were 6.9%, 13.8%, 21.4%, and 49.2%, respectively, 0.7%, 3.9%, 1.3%, and 15.1% larger than unloaded TiO2. SEM results of four catalysts showed that nanometer TiO2was coated in form of grain on the surface of Al2O3. The optimal loading content was 10% at which the nanometer TiO2grains were coated on the surface of Al2O3uniformly.

Effect of Concentration TTIP on Size Nano-Powder Titanium Dioxide (TiO2)

2013 ◽  
Vol 832 ◽  
pp. 649-653 ◽  
Author(s):  
A.Z. Zainurul ◽  
M.F. Achoi ◽  
Mohamad Rusop ◽  
Saifollah Abdullah
Keyword(s):  
Particle Size ◽  
Raman Spectroscopy ◽  
Titanium Dioxide ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Nano Powder ◽  
Particle Size Analyzer ◽  
Powder Titanium ◽  
Scanning Electron

In this work, titanium Dioxide (TiO2) powder was prepared by sol gel method using Titanium (IV) Isopropoxide (TTIP) as precursor and Ethanol (C2H5OH) as solvent. The sol-gel was heated at temperature 150°C in 1 hour. Titanium Dioxide (TiO2) powder was milled with constant ball to powder ratio (BPR) of 10:1 with speed 600 rpm. Then the sample was characterized using Particle Size Analyzer, Raman Spectroscopy and Scanning Electron Microscope (SEM). Titanium Dioxide (TiO2) powder was prepared with three different concentration of TTIP to the size of Titanium Dioxide (TTIP) powder. Titanium Dioxide (TTIP) powder was milled with ball milling to produce nanopowder of Titanium Dioxide (TiO2).

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

Synthesis and Film Investigation of Titania

2013 ◽  
Vol 832 ◽  
pp. 128-131
Author(s):  
Sharipah Nadzirah ◽  
Uda Hashim
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Titanium Dioxide ◽  
Sol Gel ◽  
Titanium Butoxide ◽  
Before And After ◽  
Scanning Electron ◽  
Spin Coater

Titania or titanium dioxide (TiO2) thin film has been synthesized via sol-gel method with monoethanolamine (MEA) as a catalyst. The mixing of titanium butoxide as a precursor, ethanol as a solvent and MEA were stirred using magnetic stirrer under ambient temperature [. The TiO2solution prepared then was deposited on SiO2substrates using spin-coater and the coated films were annealed at 600°C. Finally, both before and after annealed TiO2thin films were characterized using Field Emission Scanning Electron Microscopy (FESEM). The obtained results show the different TiO2particles formation before and after annealed.

Effect of Dip-Coating Cycle on Some Physical Properties of Cu2NiSnS4 Thin Films for Photovoltaic Applications

2021 ◽  
Author(s):  
Ahmed ZITI ◽  
Bouchaib HARTITI ◽  
Amine BELAFHAILI ◽  
Hicham LABRIM ◽  
Salah FADILI ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Dip Coating ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Uv Visible ◽  
The Impact ◽  
Scanning Electron

Abstract Quaternary semiconductor Cu2NiSnS4 thin film was made by the sol-gel method associated to dip-coating technique on ordinary glass substrates. In this paper, we have studied the impact of dip-coating cycle at different cycles: 4, 5 and 6 on the structural, compositional, morphological, optical and electrical characteristics. CNTS thin films have been analyzed by various characterization techniques including: X-ray diffractometer (XRD), Raman measurements, scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDS), UV-visible spectroscopy and four-point probe method. XRD spectra demonstrated the formation of cubic Cu2NiSnS4 with privileged orientation at (111) plane. Crystallite size of cubic CNTS thin films increase with from 6.30 to 9.52 with dip-coating cycle augmented. Raman scattering confirmed the existence of CNTS thin films by Raman vibrational mode positioned at 332 cm− 1. EDS investigations showed near-stoichiometry of CNTS sample deposited at 5 cycles. Scanning electron microscope showed uniform surface morphologies without any crack. UV-visible spectroscopy indicated that the optical absorption values are larger than 104 cm− 1, Estimated band gap energy of CNTS absorber layers decrease from 1.64 to 1.5 eV with dip-coating cycle increased. The electrical conductivity of CNTS thin films increase from 0.19 to 4.16 (Ω cm)-1. These characteristics are suitable for solar cells applications.

Research on the Ultra-Fine Titanium Dioxide Suspension Stability and Fractal

2011 ◽  
Vol 361-363 ◽  
pp. 288-295
Author(s):  
De Wei Chen ◽  
Xiao Ling Ge ◽  
Quen Tin Shi ◽  
Jiu Wang Tian
Keyword(s):  
Titanium Dioxide ◽  
Fractal Dimension ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Sediments ◽  
Suspension Stability ◽  
Matlab Program ◽  
Different Types ◽  
Scanning Electron ◽  
Dioxide Suspension

Using scanning electron microscope, the microscopic pictures of the surface on sediment have been obtained from the sub-micron titanium dioxide suspensions without dispersant or adding different types of dispersants. Deposits of titanium dioxide suspension have been observed and the mechanism of the dispersant has been analyzed. Meanwhile, deposits of titanium dioxide gray distribution figure have been gained by self-compiled Matlab program, which proved that the surface sediments is fractal, and the fractal dimension has been calculated under different conditions. The rules between suspension stability and fractal dimension have been achieved.

Synthesize and Characterization Zr-Al-Si Post through Eggshell Membrane Strengthening with PMMA Matrix

2016 ◽  
Vol 696 ◽  
pp. 85-88
Author(s):  
Niko Eka Putra ◽  
Yosa Fendra ◽  
Denny Nurdin ◽  
Bambang Sunendar Purwasasmita
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Polymethyl Methacrylate ◽  
Sol Gel ◽  
Eggshell Membrane ◽  
Gel Method ◽  
Sol Gel Method ◽  
Three Point Bending ◽  
Hardness Tester ◽  
Scanning Electron

Zr-Al-Si posts were successfully synthesized using biotemplate of eggshell membrane by sol-gel method and strengthening with matrix of polymethyl methacrylate (PMMA). The dental posts made were analyzed with the scanning electron microscope (SEM), three point bending and microvickers hardness tester. There are two methods used to synthesized Zr-Al-Si posts, with calcination and without calcination. The synthesized mechanism is discussed here.

UV-Blocking Properties of Silica/Titania Hybrid Nanocomposites

2007 ◽  
Vol 334-335 ◽  
pp. 1065-1068 ◽  
Author(s):  
Yi He Zhang ◽  
J.H. Xin ◽  
W.A. Daoud ◽  
Xiang Yang Hao
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Silica Nanoparticles ◽  
Field Emission ◽  
Cotton Fabric ◽  
Sol Gel ◽  
Hybrid Nanocomposites ◽  
High Magnification ◽  
Uv Blocking ◽  
Scanning Electron

Silica nanoparticles and silica/titania hybrid nanocomposites were synthesized by sol-gel processes, and padded on cotton fabric. The sizes of these particles ranged from tens to hundreds of nanometers. The morphologies of nanoparticles and hybrid nanocomposites were characterized by high magnification field-emission scanning electron microscope (FESEM). The UV-blocking properties of untreated and treated fabrics with silica/titania nanocomposites were studied and discussed.

Hydrothermal Preparation of B-Doped TiO2 and Photodegradation of Salicylic Acid under Visible Light

2012 ◽  
Vol 557-559 ◽  
pp. 1592-1595 ◽  
Author(s):  
Xiao Lin Liu ◽  
Wen Lu Guo ◽  
Jing Jing Ma
Keyword(s):  
Salicylic Acid ◽  
Electron Microscope ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Degradation Rate ◽  
Diffuse Reflectance ◽  
X Ray Diffraction ◽  
Hydrothermal Preparation ◽  
X Ray ◽  
Scanning Electron

B-doped TiO2 nanoparticles have been successfully prepared using hydrothermal synthesis with tetrabuttyl titanate and boric acid as precursor. The prepared samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis DRS), scanning electron microscope (SEM). The B-doped TiO2 nanoparticles were red-shifted than P25. And the degradation rate of B-TiO2 is 72.62% in 120 min by degradation of salicylic acid under visible light irradiation.

Fabrication and Characterization of Tin Oxide Inverse Opal by Template Method

2013 ◽  
Vol 562-565 ◽  
pp. 18-21 ◽  
Author(s):  
Jin Quan Wang ◽  
Xin Hua Wu ◽  
Yuan Yuan Wu ◽  
Sai Sai Yuan ◽  
Yan Mei Xu ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Tin Oxide ◽  
Near Infrared ◽  
Sol Gel ◽  
Precursor Solution ◽  
Diffraction Spectrum ◽  
Inverse Opal ◽  
Large Area ◽  
Scanning Electron

In this study, Tin Oxide (SnO2) inverse opal was fabricated by infiltrating SnO2 sol-gel precursor solution into Poly Styrene (PS) spheres crystal template which was generated via evaporative deposition self-assembling, then was heat treating at 500°C for two hours in controlled atmosphere box furnaces. PS spheres crystal template was characterized by Scanning electron microscope and Ultraviolet-visible-near infrared absorption spectrometer. The SnO2 inverse opal was characterized by Scanning electron microscope, Energy Diffraction Spectrum, X Ray Diffraction. The large-area, highly ordered SnO2 inverse opal was achieved in this paper.

Photodegradation of Methylene Blue Using Titanium Dioxide in Different Lighting Area

2016 ◽  
Vol 706 ◽  
pp. 99-103
Author(s):  
Nuchanaporn Pijarn ◽  
Hasan Seng ◽  
Chanatan Dissong ◽  
Tuwaeibroheng Toso
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Equilibrium State ◽  
Spectrophotometric Method ◽  
Sol Gel ◽  
The Other ◽  
Gel Method ◽  
Degradation Rates ◽  
The Common ◽  
Fluorescent Lighting

The objectives of this work were to investigate the degradation of methylene blue (MB) by titanium dioxide (TiO2) photocatalyst in dark or no lighting area (NL), the common fluorescent lighting area (FL), and direct sun lighting area (SL). The experimental sections were carried on sol gel method of TiO2 synthesis, the 100 mg of photocatalytic sample was put in 2.0 ppm methylene blue (MB) dye solution, hold in the dark area for 30 minutes to equilibrium state, after that the sample solution can be divided into three area holder that are NL, FL and SL. The degradation rates were studied with UV-Vis spectrophotometric method. The solution hold in the NL area has lower percent degradation than the other, while the solution hold in FL area has higher percent degradation than the other.

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