Preparation of Alumina Nanowires by Etched Method in Acid Solution

2014 ◽  
Vol 609-610 ◽  
pp. 370-374
Author(s):  
Rui Yang ◽  
Gui Quan Jiang ◽  
Jun Ma ◽  
Shi Yan Han ◽  
Jiu Yin Pang
Keyword(s):  
Titanium Dioxide ◽  
Activated Carbon ◽  
Acid Solution ◽  
Electrochemical Method ◽  
Catalytic Effect ◽  
Porous Alumina ◽  
Alumina Films ◽  
Better Than

Porous alumina films are obtained on aluminum piece by electrochemical method. In this work, we ues a kind of method for alumina nanowires by the alumina films. The result is showed with SEM. We study the effects of etching action in the dilute HF solution, and deduce the reason. We study catalyzed formaldehyde by the alumina nanowire supported titanium dioxide, results show that, the catalytic effect is better than activated carbon supported.

Preparation of Porous Alumina by Anodization

2005 ◽  
Vol 23 ◽  
pp. 75-78 ◽  
Author(s):  
C.X. Xu ◽  
X.S. Zhang ◽  
X.W. Sun
Keyword(s):  
Sulfuric Acid ◽  
Oxalic Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Porous Alumina ◽  
Fabrication Process ◽  
Alumina Films ◽  
Anodization Process

The characteristics of porous alumina produced by anodization in both oxalic acid and sulfuric acid solution have been studied. The diameter of the pores for oxalic acid as electrolyte is about 60 nm and for sulfuric acid as electrolyte is about 30 nm. The morphologies of the pores have been improved by two-step anodization process. It has been observed that the temperature and operation voltage are two of the most important factors in the fabrication process of porous alumina films.

Effects of Anodic Oxidation Process on Transmittance of Porous Alumina on Glass Substrate

2011 ◽  
Vol 179-180 ◽  
pp. 274-278
Author(s):  
Pei Tao Guo ◽  
Zhi Lin Xia ◽  
Yi Yu Xue ◽  
Li Xin Zhao ◽  
Rui Wu
Keyword(s):  
Oxalic Acid ◽  
Phosphoric Acid ◽  
Acid Solution ◽  
Anodic Oxidation ◽  
Glass Substrate ◽  
Porous Alumina ◽  
Oxalic Acid Solution ◽  
Normal Incidence ◽  
Phosphoric Acid Solution ◽  
Alumina Films

Aluminum films were deposited on glass substrate by electron beam heat evaporation, and porous alumina films with high transmittance were prepared by means of anodic oxidation under different anodizing conditions in oxalic acid solution or phosphoric acid solution respectively. Thus the morphology of these porous alumina films was characterized by different structural. he optical transmittance spectrum at normal incidence over the 300~1000nm spectra region were obtained by spectrophotometer, which shows, in visible and ultraviolet light region, the transmittance of porous alumina films prepared in oxalic acid solution is much better than that prepared in phosphoric acid solution. The SEM analysis results showed that the pores are circular and uniform in porous alumina prepared in oxalic acid but irregular and non-uniform in that prepared in phosphoric acid, which affected the surface roughness of alumina films.

Effect of TiO2 crystal form on the denitration performance of Ce–W–Ti catalyst

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Xue Bian ◽  
Yuntao Yu ◽  
Nana Hao ◽  
Wenyuan Wu
Keyword(s):  
Titanium Dioxide ◽  
Mixed Crystal ◽  
Surface Acidity ◽  
High Surface ◽  
Crystal Form ◽  
Large Specific Surface Area ◽  
Metatitanic Acid ◽  
Pure Phase ◽  
Crystal Phases ◽  
Better Than

Abstract Titanium dioxide supports, which were prepared by roasting metatitanic acid under different conditions, were used to prepare a series of Ce–W–Ti catalysts. The structure and denitration properties of the catalyst were studied. The results showed that TiO2 had different crystal types (mixed crystal phases with different proportions of anatase and rutile) under different roasting conditions, and the denitration efficiency of mixed crystal was better than that of pure phase TiO2. Ce–W/200 °C-1 hTiO2 catalyst exhibited a prominent NO conversion rate, and it can reach higher than 90% at a temperature range from 250 to 500°C. The large specific surface area, low content of rutile TiO2 in the support, high content of chemical adsorbed oxygen and high surface acidity were favorable to denitration performance of Ce–W–Ti catalyst.

Embedded space charge in porous alumina films formed in phosphoric acid

2007 ◽  
Vol 53 (2) ◽  
pp. 300-304 ◽  
Author(s):  
I. Vrublevsky ◽  
A. Jagminas ◽  
J. Schreckenbach ◽  
W.A. Goedel
Keyword(s):  
Phosphoric Acid ◽  
Space Charge ◽  
Porous Alumina ◽  
Alumina Films

Phenol Removal from Contaminated Wastewater Using Activated Carbon/Zeolite Composite Coated with Titanium Dioxide

2016 ◽  
Vol 690 ◽  
pp. 103-108
Author(s):  
Khemmakorn Gomonsirisuk ◽  
Thanakorn Wasanapiarnpong ◽  
Charusporn Mongkolkachit
Keyword(s):  
Titanium Dioxide ◽  
Activated Carbon ◽  
High Efficiency ◽  
Adsorption Property ◽  
Phenol Concentration ◽  
Study Phase ◽  
Phenol Removal ◽  
High Porosity ◽  
Good Efficiency ◽  
Composite Substrate

Phenol and phenolic compounds in wastewater from various industries were toxic to water livings and human even in ppm concentration. A number of photocatalysts and adsorbents were applied for the low cost and good efficiency wastewater management to reduce phenol concentration in water. In this work titanium dioxide, one of high efficiency photocatalysts which is widely used in water treatement, was coated on the fabricated adsorbent composite substrate. The composite substrate composed of activated carbon and NaA zeolite presents high phenol adsorption because of high porosity and good ion exchange properties resulting in good adsorption property. Accordingly, the absorption could promote the photocatalytic activity of TiO2 catalyst. As the specimens were easily disposed after water treatment process, therefore, it was a good choice for lower energy consumption. The composite substrate was easily fabricated by simple extrusion and fired under non oxidation atmosphere at 650°C for 3 hours. Then polyurethane foam was inserted into the composite substrate to make it be able to float and be swirled by wind near water surface to get more UV excitation than deeper water. Phenol concentration was investigated by the UV absorbance at 270 nm using UV-Vis spectrophotometer. The XRD and SEM were used to study phase crystal structure and morphology of the composite.

scholarly journals Synthesis of ZnO/CuO Composite by The Electrochemical Method in The Acetat Acid Solution

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Adrian Nur ◽  
Jundi Rofi’uddien ◽  
Muhammad Abdul Basir ◽  
Nazriati Nazriati ◽  
Fauziatul Fajaroh
Keyword(s):  
Solar Cell ◽  
Fuel Cell ◽  
Metal Oxide ◽  
Acid Solution ◽  
Functional Groups ◽  
Phase Structure ◽  
Electrochemical Method ◽  
Oxide Composite ◽  
Bacterial Agent ◽  
Oxide Composites

<p>The metal oxide composite is used to the microelectronic circuit, piezoelectric, fuel cell, sensor, catalyst, coating for preventing corrosion, and solar cell. The ZnO/CuO is one of the metal oxide composites. The combination of ZnO and CuO is the potential composite used to the catalyst and the anti-bacterial agent. The method used in this research was the electrochemical method in the acetate acid solution. The acetate acid solution used in this research is cheaper than the succinite acid used in the previous research. The electrochemical method has advantages due the easy to control and cheap. The composite resulted was analyzed by the XRD and the FTIR. The aims of this analysis are to know the crystallite phase, structure, and the functional groups of the particle resulted. The analysis showed that the ZnO-CuO composite can be resulted by the electrochemical method.</p>

Cleaning of olive mill wastewaters by visible light activated carbon doped titanium dioxide

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85586-85591 ◽  
Author(s):  
Francesca Cuomo ◽  
Francesco Venditti ◽  
Andrea Ceglie ◽  
Antonella De Leonardis ◽  
Vincenzo Macciola ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Activated Carbon ◽  
Visible Light ◽  
Olive Mill Wastewater ◽  
Total Phenols ◽  
Carbon Doped ◽  
Olive Mill Wastewaters ◽  
Doped Titanium Dioxide ◽  
Olive Mill

Visible light activated carbon doped titanium dioxide fully works in the removal of total phenols from olive mill wastewater.

Sign in / Sign up

Export Citation Format

Share Document