Preparation of Different Morphology TNT Film Electrodes and its Photocatalytic Degradation of Alachlor in Aqueous Solution

2012 ◽  
Vol 271-272 ◽  
pp. 362-366
Author(s):  
Chun Li Wang ◽  
Yao Zhong ◽  
Yan Jun Xin
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Oxidation Process ◽  
Degree Of Crystallinity ◽  
Nanotube Arrays ◽  
Film Electrode ◽  
X Ray Diffraction ◽  
X Ray ◽  
Morphology And Structure ◽  
Anodic Oxidation Process

Titanium dioxide(TiO2) nanotube film electrodes were fabricated by an anodic oxidation process at different preparing conditions. The morphology and structure of the TNT film electrodes were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Photocatalytic activity of the TNT film electeodes was evaluated by the degradation of alachlor in aqueous solution under visible light irradiation. Results indicated TNT film electrode anodized at 20V had well-aligned and highly ordered nanotube arrays and possessed relatively higher photocatalytic activity. In addition, the TNT film electrodes calcined at 500°C for 2 h with the higher degree of crystallinity exhibited the higher photocatalytic activity than other samples calcined at 300°C and 800°C.

Photocatalysis Activity of TiO2-Based/Dendrimer Phthalocyanine Nanocomposite Photocatalyst

2014 ◽  
Vol 703 ◽  
pp. 86-89
Author(s):  
Shu Rong Xiao ◽  
Bao Quan Huang ◽  
Qing Hua Chen ◽  
Hun Xue ◽  
Qing Rong Qian ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Significant Activity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Morphology And Structure ◽  
Nanocomposite Catalyst ◽  
Photochemical Stability ◽  
Loading Amount

The photocatalytic activity of polycrystalline TiO2samples impregnated with dendritic zinc phthalocaynine was investigated using the rhodamine B (RhB) aqueous solution as a probe. The morphology and structure of TiO2/dendrimer phthalocyanine nanocomposite catalyst were characterized by X-ray diffraction (XRD) and UV-Vis spectra. Significant activity improvements of the TiO2/dendrimer phthalocyanine nanocomposite photocatalyst were observed possible in terms of lower loading amount, enhanced photo-reactivity under light irradiation, as well as chemical, and photochemical stability of the sensitizers.

Synthesis, Characterization and Photocatalytic Activity of Nb-Doped TiO2 Nanoparticles

2012 ◽  
Vol 455-456 ◽  
pp. 110-114 ◽  
Author(s):  
Xuan Dong Li ◽  
Xi Jiang Han ◽  
Wen Ying Wang ◽  
Xiao Hong Liu ◽  
Yan Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Doped Tio2 ◽  
X Ray ◽  
Vis Spectroscopy

Nb-doped TiO2 powders with different concentrations of Nb have been synthesized by a sol-gel method and characterized by a series of technologies including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy. The photocatalytic activity of Nb-doped TiO2 is evaluated by degradation efficiency of methyl orange in aqueous solution. The results indicate that the photocatalytic activity of Nb-doped TiO2 synthesized with a Nb/Ti molar ratio of 5% is higher than that of TiO2 under the visible light.

Photocatalysis Reactivity in the Visible Light of B-Doped TiO2 Nanotube Arrays

2013 ◽  
Vol 860-863 ◽  
pp. 907-910
Author(s):  
Xiao Xia Lin ◽  
Jia Liu ◽  
De Gang Fu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectrum ◽  
Nanotube Arrays ◽  
X Ray Diffraction ◽  
Degradation Model ◽  
X Ray ◽  
Light Region

B-doped TiO2nanotube arrays (B-TNTs) were synthesized by anodization method combined with dip-calcination technique. The physicochemical properties and surface morphology were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and UV-Vis diffuse reflectance spectrum (DRS). Methyl blue (MB) solution was utilized as the degradation model to evaluate the photocatalytic activity of B-TNTs under visible light irradiation. The results show B-TNTs shifts the absorption edge of TiO2nanotube arrays to the visible light region and B-TNTs displays higher photocatalytic activity compared with undoped TNTs.

Preparation and Characterization of Cu Loaded TiO2 Nanotube Arrays and their Photocatalytic Activity

2011 ◽  
Vol 364 ◽  
pp. 377-381 ◽  
Author(s):  
Syazwani Mohd Zaki ◽  
Srimala Sreekantan
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Anatase Phase ◽  
Average Diameter ◽  
Photoelectron Spectra ◽  
Nanotube Arrays ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
Wet Impregnation ◽  
X Ray

This paper described the preparation of Cu loaded TiO₂ nanotube arrays. Firstly, TiO₂ nanotube arrays were formed by anodization. Afterwards, the formed nanotube arrays were incorporated with Cu by wet impregnation method. The soaking time and concentration were varied to obtain an optimum set of parameter for Cu incorporation in TiO₂ nanotubes. After anodization, all samples were annealed at 400°C for 4 hours to obtain anatase phase. The nanotube arrays were characterized by field emission scanning electron microscopy (FESEM), x-ray diffraction (XRD) and x-ray photoelectron spectra (XPS). An average diameter 63.02 nm and length 12.15µm were obtained for TiO₂ nanotubes. The photocatalytic activity of these nanotubes were investigated with methyl orange (MO) and the TiO₂ nanotube prepared in 0.01M of Cu (NO₃)₂ solution within 3 hours demonstrates the highest photocatalytic activity with 83.6% degradation of methyl orange. Keywords: copper doping, wet impregnation, photocatalytic activity

scholarly journals Tuning the Morphology of Ag3PO4 Photocatalysts with an Elevated Concentration of KH2PO4

2019 ◽  
Vol 14 (3) ◽  
pp. 625 ◽  
Author(s):  
Khusnul Afifah ◽  
Roy Andreas ◽  
Dadan Hermawan ◽  
Uyi Sulaeman
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
High Photocatalytic Activity ◽  
Elevated Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Defect Sites ◽  
Excellent Photocatalytic Activity

Tuning the morphology of Ag3PO4 photocatalysts with an elevated concentration of KH2PO4 have been successfully conducted. This photocatalyst was prepared by starting material of AgNO3 and KH2PO4.  The KH2PO4 aqueous solution with five concentrations of 0.10 M, 0.15 M, 0.30 M, 0.45 M, and 0.60 M was reacted with AgNO3 aqueous solution. The products were characterized using X-ray Diffraction (XRD), UV-Vis Diffuse Reflectance Spectroscopy (DRS), and Scanning Electron Microscopy (SEM). The concentration of KH2PO4 significantly affected the morphology, size, and crystallinity of catalyst. The morphology of Ag3PO4 may be tuned with the synthesis using an elevated concentration of KH2PO4. The sample with the synthesis using 0.15 M of KH2PO4 exhibited the excellent photocatalytic activity. The high photocatalytic activity was caused by the small size of mixed morphology of sphere and tetrahedron, high crystallinity and defect sites. Copyright © 2019 BCREC Group. All rights reserved 

scholarly journals Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2Film

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
Chun He ◽  
Mudar Abou Asi ◽  
Ya Xiong ◽  
Dong Shu ◽  
Xiangzhong Li
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Formic Acid ◽  
Dip Coating ◽  
Photoelectrochemical Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photoelectrocatalytic Degradation ◽  
Interfacial Charge ◽  
Electronic Microscope

A series of Pt-TiO2films with nanocrystaline structure was prepared by a procedure of photodeposition and subsequent dip-coating. The Pt-TiO2films were characterized by X-ray diffraction, scanning electronic microscope, electrochemical characterization to examine the surface structure, chemical composition, and the photoelectrochemical properties. The photocatalytic activity of the Pt-TiO2films was evaluated in the photocatalytic (PC) and photoelectrocatalytic (PEC) degradation of formic acid in aqueous solution. Compared with aTiO2film, the efficiency of formic acid degradation using the Pt-TiO2films was significantly higher in both the PC and PEC processes. The enhancement is attributed to the action of Pt deposits on theTiO2surface, which play a key role by attracting conduction band photoelectrons. In the PEC process, the anodic bias externally applied on the illuminated Pt-TiO2films can further drive away the accumulated photoelectrons from the metal deposits and promote a process of interfacial charge transfer.

scholarly journals The Effect of the Reducing Sugars in the Synthesis of Visible-Light-Active Copper(I) Oxide Photocatalyst

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1149
Author(s):  
Szilvia Fodor ◽  
Lucian Baia ◽  
Kornélia Baán ◽  
Gábor Kovács ◽  
Zsolt Pap ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectroscopy ◽  
Structural Characteristics ◽  
Reducing Agent ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
Methyl Orange Degradation ◽  
X Ray ◽  
Visible Light Active

In the present work, shape tailored Cu2O microparticles were synthesized by changing the nature of the reducing agent and studied subsequently. d-(+)-glucose, d-(+)-fructose, d-(+)xylose, d-(+)-galactose, and d-(+)-arabinose were chosen as reducing agents due to their different reducing abilities. The morpho-structural characteristics were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and diffuse reflectance spectroscopy (DRS), while their photocatalytic activity was evaluated by methyl orange degradation under visible light (120 min). The results show that the number of carbon atoms in the sugars affect the morphology and particle size (from 250 nm to 1.2 µm), and differences in their degree of crystallinity and photocatalytic activity were also found. The highest activity was observed when glucose was used as the reducing agent.

Effect of Ag+ and PO43− ratios on the microstructure and photocatalytic activity of Ag3PO4

2016 ◽  
Vol 09 (05) ◽  
pp. 1650063 ◽  
Author(s):  
Jiaqian Qin ◽  
Xinyu Zhang ◽  
Chengwu Yang ◽  
Aijun Song ◽  
Bing Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Diffuse Reflectance ◽  
Photocatalytic Performance ◽  
Diffuse Reflectance Spectroscopy ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Visible ◽  
The Rich

In this work, the catalyst silver phosphate (Ag3PO[Formula: see text] with different initial ratios of Ag[Formula: see text] and PO[Formula: see text] in aqueous solution was synthesized by a simple precipitation method from AgNO3 and NH4H2PO4 which were used as the precursor. After that, the prepared samples were characterized by different techniques such as field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (UV-DRS) and decomposition evolution of rhodamine B (RhB) solution. The results indicate that the initial ratios of Ag[Formula: see text]/PO[Formula: see text] in aqueous solution can modify the morphology and also it can significantly affect the photocatalytic performance. During photocatalytic process, the rich Ag[Formula: see text] ion Ag3PO4 can form the surface plasmon resonance (SPR) of Ag nanoparticles, which inhibit the reduction of Ag3PO4 resulting in higher photocatalytic activity and stability.

Preparation and Photocatalytic Activity of TiO2/Fe2O3 Nanocomposite

2011 ◽  
Vol 130-134 ◽  
pp. 2396-2399
Author(s):  
Su Juan Hu ◽  
Xuan Hui Zhang ◽  
Ying He ◽  
Xian Chao Hu ◽  
Lei Cheng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Electron Microscope ◽  
Synergistic Effect ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Particle Coating ◽  
Transmission Electron ◽  
Phase Pure

TiO2/Fe2O3 nanocomposite was fabricated by a hydrolysis-precipitation approach, with TiCl4 as precursor and Fe2O3 as support. The crystal phase, diameter and morphology of the sample particle were characterized by X-ray diffraction, transmission electron microscope. The results show that the samples are composed of haematite and rutile. The morphology and diameter of rutile particle, coating effect and weight percentages of haematite and rutile are related to the preparing temperature and molar ratio of Fe/Ti. The photocatalytic activity of the prepared photocatalyst was estimated in an aqueous solution at ambient temperature of 303K. The results imply that the photocatalytic activity of the sample is higher than that of phase pure rutile, related to Fe/Ti molar ratio and its preparing temperature. These results can be attribute to the microsturcture of the sample. A synergistic effect exists between titania and haematite in the nanocomposite.

Photocatalytic Performance of ZnO Prepared by Sol-Gel Method with the Assistance of CTAB

2014 ◽  
Vol 881-883 ◽  
pp. 256-259
Author(s):  
Hua Fang ◽  
Wei Wu ◽  
Zhun Huang
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Cetyltrimethylammonium Bromide ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Bet Method

ZnO photocatalyst was prepared by sol-gel method with the assistance of cetyltrimethylammonium bromide (CTAB). The specific surface area and structure were characterized by Brunauer-Emmett-Teller (BET) method and X-ray diffraction (XRD), respectively. The photocatalytic activity of ZnO prepared for decolorization of methyl orange (MO) aqueous solution was evaluated. The results show that ZnO (mol ratio of ZnO/CTAB is 10) baked at 500°C holds the best photocatalytic activity.

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