Design of Air Purifiers for Aircraft Passenger Cabins Based on Photocatalytic Oxidation Technology

2008 ◽  
pp. 135-135-26 ◽  
Author(s):  
RJ Hall ◽  
JJ Sangiovanni ◽  
HH Hollick ◽  
TN Obee ◽  
SO Hay
Keyword(s):  
Photocatalytic Oxidation ◽  
Oxidation Technology

Application of Photocatalytic Oxidation Technology on Water Treatment

2012 ◽  
Vol 550-553 ◽  
pp. 657-661
Author(s):  
Wan Yi Liu ◽  
Zhen Bin Zhang ◽  
Li Shen ◽  
Rui Yang Chen ◽  
Miao Liu
Keyword(s):  
Water Treatment ◽  
Photocatalytic Oxidation ◽  
Redox System ◽  
Polluted Water ◽  
Semiconductor Surface ◽  
Bacteria Inactivation ◽  
Type Semiconductor ◽  
Oxidation Technology ◽  
Gap Width ◽  
Treatment Application

TiO2 catalyst is n-type semiconductor material. As long as the semiconductor absorbs photons of no less than the band gap width，it enters the excited state together with the formation of light-induced hole in the valence band simultaneously. It is perfectly capable of capturing electronic,and the photo-induced electron e- in the conduction band also has high activity to form a redox system in the semiconductor surface through which most of the organic pollutants and partial inorganic pollutants eventually degrade into innoxious substances. It describes the application of photocatalytic oxidation technology in the field such as treatment of industrial wastewater (inorganic polluted water; dye wastewater; papermaking wastewater; pesticide wastewater; oily wastewater) and drinking water. The research shows that various indexes (chromaticity; COD; mineralization rate; bacteria inactivation rate, etc.) of this technology in water treatment application have achieved the required standards.

Effect of photocatalytic oxidation technology on GaN CMP

2016 ◽  
Vol 361 ◽  
pp. 18-24 ◽  
Author(s):  
Jie Wang ◽  
Tongqing Wang ◽  
Guoshun Pan ◽  
Xinchun Lu
Keyword(s):  
Photocatalytic Oxidation ◽  
Oxidation Technology

Photocatalytic Oxidation Technology for Trace Contaminant Control in Aircraft and Spacecraft

1996 ◽  
Author(s):  
Robert J. Hall ◽  
Timothy N. Obee ◽  
Stephen O. Hay ◽  
Joseph J. Sangiovanni ◽  
Paul A. Bonczyk ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Trace Contaminant ◽  
Oxidation Technology ◽  
Contaminant Control

Field evaluation of a photocatalytic oxidation technology

1998 ◽  
Vol 38 (7) ◽  
pp. 117-125 ◽  
Author(s):  
Kirankumar Topudurti ◽  
Mary Wojciechowski ◽  
Sandy Anagnostopoulos ◽  
Richard Eilers
Keyword(s):  
System Performance ◽  
Photocatalytic Oxidation ◽  
Field Evaluation ◽  
Operating Conditions ◽  
Matrix System ◽  
Commercial Scale ◽  
Volatile Organic ◽  
The Matrix ◽  
Oxidation Technology ◽  
Oxidation System

A commercial-scale photocatalytic oxidation system developed by Matrix Photocatalytic Inc. (Matrix) was evaluated to generate performance and cost data for the treatment of groundwater contaminated with volatile organic compounds (VOCs). High percent removals (up to 99.9%) were observed for aromatic and unsaturated VOCs. However, saturated VOC removals were insignificant. Oxidant addition to the contaminated groundwater significantly improved the treatment system performance. The Matrix system performance was reproducible under identical operating conditions. Treatment by the Matrix system did not reduce the groundwater toxicity for water fleas and fathead minnows at the 95% confidence level. Toxicity reduction achieved through VOC removal appears to have been negated by the formation of toxic byproducts including aldehydes and haloacetic acids. Estimated treatment costs are about $7.60 per 1,000 litres of groundwater.

scholarly journals Development of Ti-Bi-based nanomaterials to purify mercury in the simulated flue gas

2018 ◽  
Vol 53 ◽  
pp. 01029 ◽  
Author(s):  
Yu Guan ◽  
Lingjie Yu ◽  
Jiang Wu ◽  
Xiaoming Sun
Keyword(s):  
Removal Efficiency ◽  
Flue Gas ◽  
Photocatalytic Oxidation ◽  
Surface Defect ◽  
New Technology ◽  
Development Stage ◽  
Transfer Velocity ◽  
Experimental Development ◽  
Oxidation Technology ◽  
Calcination Method

The photocatalytic oxidation technology is a new technology for the oxidation treatment of Hg0 developed in the existing Wet Flue Gas Desulfurization (WFGD) equipment, in which the removal efficiency of Hg2+ is high and the removal efficiency of Hg0 is very low. When ultraviolet light (UV) is used to irradiate a substance containing TiO2 to pass the flue gas, photocatalytic catalytic oxidation reaction occurs, and Hg0 is oxidized to Hg2+, which is easily absorbed later in the WFGD apparatus, thereby improving the removal efficiency of mercury. The technology is still in the experimental development stage and needs further research. It has brought widespread interests to introduce surface defect or form interface heterostructure to improve the photocatalytic activity of the nanomaterials. The Ti-Bi-based nanomaterial photocatalyst with defect TiO2/BiOIO3 heterostructure has been fabricated via calcination method. The results showed that to introduce surface defect and form interface heterostructure on photocatalysts together can increase the response of the visible light, promoting the transfer velocity of the photocarriers and in turn suppressing the recombination of photo-generated electrons and holes, and this may become a developing trend in the near future.

Experimental Study on Photocatalytic Pretreatment of Restaurant Wastewater with Nano TiO2

2013 ◽  
Vol 807-809 ◽  
pp. 1575-1578
Author(s):  
Jin Yong Huang ◽  
Li Bin Peng ◽  
Lin Peng
Keyword(s):  
Experimental Study ◽  
Removal Efficiency ◽  
Biological Treatment ◽  
Photocatalytic Oxidation ◽  
Proper Time ◽  
Irradiation Time ◽  
Optimal Conditions ◽  
Oxidation Technology ◽  
Restaurant Wastewater

The study aims at investigating the performance of nanoTiO2photocatalytic oxidation technology for the pretreatment of restaurant wastewater. The rate of lipids removal depends on conditions, such as irradiation time, TiO2dosage, aeration and addition of Fe3+or H2O2.The optimal conditions are determined: proper time of irradiation 10 min, TiO2dosage 25mg/L,pH6.0, adding 5mL Fe3+. Under this optimum, the removal efficiency of lipids reaches 74.7 ~ 88.6%, and that of CODcr was around 45.2~76.2%.While using illumination for 10 min, companied with TiO2and Fe3+/H2O2, the removal efficiency of Grease could increase by 3%~15%.Thus, satisfactory results were achieved for pretreatment of Grease Wastewater from restaurant, and this technique could be used as a pretreatment step for next biological treatment of restaurant wastewater.

Photocatalytic oxidation technology for indoor environment air purification: The state-of-the-art

2017 ◽  
Vol 203 ◽  
pp. 247-269 ◽  
Author(s):  
Alireza Haghighat Mamaghani ◽  
Fariborz Haghighat ◽  
Chang-Seo Lee
Keyword(s):  
Indoor Environment ◽  
Photocatalytic Oxidation ◽  
State Of The Art ◽  
The State ◽  
Air Purification ◽  
Oxidation Technology

Performance study on a novel hybrid solar gradient utilization system for combined photocatalytic oxidation technology and photovoltaic/thermal technology

2018 ◽  
Vol 215 ◽  
pp. 699-716 ◽  
Author(s):  
Bendong Yu ◽  
Qingyang Jiang ◽  
Wei He ◽  
Shanshan Liu ◽  
Fan Zhou ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Performance Study ◽  
Oxidation Technology
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