Fabrication of a visible-light response mesoporous TiO2 membrane with superior water permeability via a weak alkaline sol–gel process

2011 ◽  
Vol 47 (12) ◽  
pp. 3457 ◽  
Author(s):  
Xueping Cao ◽  
Wenheng Jing ◽  
Weihong Xing ◽  
Yiqun Fan ◽  
Yan Kong ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Permeability ◽  
Sol Gel ◽  
Light Response ◽  
Mesoporous Tio2 ◽  
Visible Light Response ◽  
Sol Gel Process

Preparation, Characterization, and Photocatalytic Property of N-La Co-Doped TiO2 with Visible Light Response

2012 ◽  
Vol 529 ◽  
pp. 537-540 ◽  
Author(s):  
Gui Hua Li ◽  
An Feng Wang
Keyword(s):  
Visible Light ◽  
Reaction Temperature ◽  
Catalyst Activity ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Light Response ◽  
Catalyst Amount ◽  
Doped Tio2 ◽  
Sol Gel Process ◽  
Co Doped

N-La co-doped TiO2 has been synthesized via sol-gel process. The XRD result showed that the structure of N-La co-doped TiO2 was anatase. Their performance of photocatalytic degradation of methylene blue under visible light were investigated. The combined effects of catalyst compsition, calcination temperature, catalyst amount and reaction temperature on catalyst activity were investigated. Experiment results depicted that activeness of catalyst N2.5La0.5/TiO2 calcinated at 500°C for 2h was highest. Using this catalyst, when the catalyst amount was 0.35 g/L, the reaction temperature was 40°C the degradation rate of mehylene blue in 4h could reach 96.5%.

scholarly journals Cobalt Doping on Zirconium Titanate as a Potential Photocatalyst with Visible-Light-Response

2020 ◽  
Vol 20 (4) ◽  
pp. 911
Author(s):  
Emilya Faridatul Sulaikhah ◽  
Rian Kurniawan ◽  
Mokhammad Fajar Pradipta ◽  
Wega Trisunaryanti ◽  
Akhmad Syoufian
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Diffraction Method ◽  
Light Response ◽  
Zirconium Titanate ◽  
Titanium Tetraisopropoxide ◽  
X Ray ◽  
Visible Light Response ◽  
Vis Spectroscopy ◽  
Co Doped

Synthesis of cobalt-doped zirconium titanate (Co-doped ZrTiO4) as a potential photocatalyst with visible-light-response had been conducted. Materials used in this research were titanium tetraisopropoxide (TTIP) as a precursor of TiO2, ZrO2 as another semiconductor for coupling, and CoSO4·7H2O as the source of cobalt dopant. The composite was prepared by the sol-gel method with various cobalt contents and calcination temperatures. Composites with various Co dopant contents (0, 1, 3, 5, 7, and 9% (Co wt./Ti wt.)) were calcined at 500 °C for 4 h. In addition, the composite with 5% of dopant content was calcined at 700 and 900 °C to observe the influence of calcination temperature. All samples were characterized by using X-ray powder diffraction method (XRD), Fourier-transform infrared spectroscopy (FTIR), specular reflectance UV-Vis spectroscopy (SRUV), and scanning electron microscopy equipped with X-ray energy dispersive spectroscopy (SEM-EDS). Co-doped ZrTiO4 with the lowest bandgap (2.94 eV) was achieved in a sample containing 3% of cobalt content calcined at 500 °C.

Mesoporous TiO2−xAy (A = N, S) as a visible-light-response photocatalyst

2010 ◽  
Vol 12 (4) ◽  
pp. 490-497 ◽  
Author(s):  
Jinshu Wang ◽  
Hui Li ◽  
Hongyi Li ◽  
Chen Zou
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Mesoporous Tio2 ◽  
Visible Light Response

Fabrication of CdO–graphene embedded mesoporous TiO2 composite for the visible-light response and its organic dye remediation

2019 ◽  
Vol 55 (8) ◽  
pp. 1544-1557
Author(s):  
Won-Chun Oh ◽  
Dinh Cung Tien Nguyen ◽  
Kefayat Ullah ◽  
Lei Zhu ◽  
Yonrapach Areerob
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Mesoporous Tio2 ◽  
Organic Dye ◽  
Visible Light Response ◽  
Dye Remediation

Photocatalytic Activity and Visible-Light Response of TiO2 Thin Film Doped with Nitrogen by Using Urea

2017 ◽  
Vol 870 ◽  
pp. 418-423
Author(s):  
Chuya Ogawa ◽  
Kozo Taguchi
Keyword(s):  
Thin Film ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Light Response ◽  
Photocatalytic Decomposition ◽  
Simple Process ◽  
Nitrogen Doped ◽  
Visible Light Response ◽  
Fto Glass

TiO2 has become a widely investigated photocatalyst because of its low cost, low toxicity and high photocatalytic activity under UV irradiation that causes photocatalytic decomposition of organic compounds. Impurities dopant and metal are often used to acquire impurities doped or metal doped TiO2 powder by a sol-gel method. In this paper, we made nitrogen doped TiO2 by a simple process. TiO2 (P25) thin films with 80 % of anatase and 20 % of rutile were fabricated on FTO glass by electrophoretic deposition (EPD). These were then doped with nitrogen by using urea and sintered in electric furnace at 500 and 600 degrees Celsius. EPD was superior for film formation at dispersibility. We calculated absorbance spectra of nitrogen doped TiO2 thin film fabricated on FTO glass. As the result, 600 degrees Celsius is superior sintering temperature at absorbance under visible light than 500 degrees Celsius. Moreover, when the samples sintered at 600 degrees Celsius, each additive amount had different increment of absorbance in specific visible light range. This result indicates the improvement in visible-light response on TiO2 by the simple process. To further research, it is essential to make nitrogen doped TiO2 under pressure and measure the photodegradation reaction.

scholarly journals Enhancing the photocatalytic activity of Ag-TiO2/SiO2 and its potential application in water treatment

2021 ◽  
Vol 947 (1) ◽  
pp. 012016
Author(s):  
Thi-Ngoc-Suong Ho ◽  
Manh-Thang Ngo ◽  
Minh-Vien Le
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Sol Gel ◽  
Light Response ◽  
Molar Ratio ◽  
Light Illumination ◽  
Visible Light Response ◽  
Visible Light Illumination ◽  
Photocatalytic Activities

Abstract Ag-doped TiO2/SiO2 with visible light response was prepared by a simple sol-gel method using titanium w-butoxide (TNB), tetraethoxysilane (TEOS) as precursors, and silver nitrate (AgNO3). The synthesized Ag-TiO2/SiO2 were characterized by SEM, XRD, PL (photoluminescence) emission and UV-Vis absorption spectroscopy. Their photocatalytic activities were evaluated by treating aqueous solutions of phenol under simulated visible light illumination. The role of silver doped was investigated in the range 1% – 5% (molar ratio), resulting in the best bandgap value of 2.93 eV for Ag(3%)-TiO2/SiO2 compared to 3,18 eV for the un-doped TiO2/SiO2. Consequently, the best phenol treating yield – about 97% after 4 hours – was obtained using Ag(3%)-TiO2/SiO2. So the synthesized Ag(3%)-TiO2/SiO2 might serve as a potential photocatalyst for water treatment using visible lights.

scholarly journals Reforming Characteristics under Visible Light Response of Cr- or Ag-Doped Prepared by Sol-Gel and Dip-Coating Process

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Akira Nishimura ◽  
Go Mitsui ◽  
Katsuya Nakamura ◽  
Masafumi Hirota ◽  
Eric Hu
Keyword(s):  
Visible Light ◽  
Uv Light ◽  
Sol Gel ◽  
Light Response ◽  
Dip Coating ◽  
Coating Process ◽  
Ag Doping ◽  
Visible Light Response ◽  
Cr Doping ◽  
Doping Case

A Cr- or Ag-doped TiO2film was prepared by sol-gel and dip-coating process and used as the photocatalyst for CO2reforming under the visible light. The ratio of amount of Cr or Ag added to amount of Ti in TiO2sol solution (R) varied from 0 to 100 wt% or 0 to 50 wt%, respectively. The total layer number of Cr- or Ag-doped TiO2film (N) coated was changed. The CO2reforming performance with the Cr- or Ag-doped TiO2film was tested under a Xe lamp with or without ultraviolet (UV) light. As a result, whenNequals to 1, the concentration of CO which was a product from CO2reforming was maximized in Cr doping case forR= 70 wt% and in Ag doping case forR= 1 wt%, respectively. The best result of concentration of CO = 8306 ppmV, concentration of CH4= 1367 ppmV, concentration of C2H6= 1712 ppmV is obtained when with Cr doping in this study.

Sign in / Sign up

Export Citation Format

Share Document