Photocatalytic Reduction of Nitrate in Wastewater Using ZnO Nanopowder Synthesized by Solution Combustion Method

2007 ◽  
Vol 7 (11) ◽  
pp. 4069-4072 ◽  
Author(s):  
Sung Park ◽  
Hee-Joon Kim ◽  
Jong Soo Kim ◽  
Kang Yoo ◽  
Jae Chun Lee ◽  
...  
Keyword(s):  
Combustion Method ◽  
Reduction Reaction ◽  
Photocatalytic Reduction ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Zno Nanopowder ◽  
Hole Scavenger ◽  
Toxic Pollutant ◽  
Unique Method ◽  
Drinking Water Purification

ZnO nanopowder was synthesized by a unique method which is called solution combustion method (SCM). This nanopowder was used for a photocatalyst to decompose nitrate that is a toxic pollutant in wastewater. It has been known that TiO2, the most popular photocatalyst, does not decompose the nitrate. In this paper, however, the SCM ZnO nanopowder decomposed about 13% of nitrate. Furthermore, adding methanol as a hole scavenger, the decomposition rate was enhanced by about 5 times. On the other hand, it has been reported that the photocatalytic reduction reaction of nitrate produces ammonia as a final product. The present results, however, suggest that the final product is non-toxic nitrogen gas rather than the toxic ammonia. These results would be very valuable for drinking water purification.

Removal of Total Organic Carbon from Aqueous Phenol Solution Using Photocatalytic ZnO Nanopowders Prepared by Solution Combustion Method

2007 ◽  
Vol 558-559 ◽  
pp. 1335-1338
Author(s):  
Sung Park ◽  
Ju Hyeon Lee ◽  
Kang Yoo ◽  
Hye Jung Park ◽  
Yun Joong Chung ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Organic Pollutant ◽  
Combustion Method ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Phenol Solution ◽  
Zno Nanopowder ◽  
Photocatalytic Activities ◽  
Zno Powder

ZnO nanopowders were prepared by Solution Combustion Method (SCM). The ZnO nanopowders synthesized using Zn(OH)2 and glycine as an oxidant and a fuel (with fuel/ oxidant ratio, F/O=0.8), showed excellent crystalline and photocatalytic characteristics. To confirm photocatalytic activities of the prepared ZnO powder, total organic carbon (TOC) was tried to remove from aqueous phenol solution. Surprisingly, SCM ZnO nanopowder shows 1.6 fold higher destruction rates of the organic pollutant than P-25 TiO2 nanopowder which is known as a kind of standard photocatalyst.

Removal of Heavy Metal Ions from Aqueous Pb-EDTA and Cu-EDTA Solutions Using Nanosized ZnO Powders by Solution-Combustion Method

2006 ◽  
Vol 317-318 ◽  
pp. 837-840 ◽  
Author(s):  
Ju Hyeon Lee ◽  
Jung Uk Seo ◽  
Yun Joong Chung ◽  
Jae Chun Lee ◽  
Sung Park
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Removal Rate ◽  
Combustion Method ◽  
Tio2 Powder ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Zno Nanopowder ◽  
Semiconductor Photocatalyst

ZnO nanopowder was prepared by a novel “solution-combustion method (SCM)” and it was used as a semiconductor photocatalyst to evaluate its photoreduction properties. Aqueous Pb-EDTA and Cu-EDTA solutions of heavy metal ions (Pb and Cu) were used for the photocatalysis reaction under UV illumination. The result was then compared with other semiconductor photocatalyst powder such as TiO2 powder (P25; Degussa) and TiO2 powder prepared by homogeneous precipitation process at low temperature (HPPLT). In the removal of Pb++ ions, the ZnO nanopowder showed 2.6 fold higher removal rate than P25 TiO2 powder and 1.8 fold higher than HPPLT TiO2. Also the ZnO nanopowder showed the highest removal rate of the Cu++ ions from the solution among the different photocatalyst powders compared. The superior photoreduction ability of the ZnO nanopowder appears to be due to its excellent UV absorption characteristics. This was confirmed by the photoluminescence (PL) measurement.

Photocatalytic decolorization of methylene blue using immobilized ZnO nanoparticles prepared by solution combustion method

2012 ◽  
Vol 44 (1-3) ◽  
pp. 174-179 ◽  
Author(s):  
Abbas Rezaee ◽  
Hossein Masoumbeigi ◽  
Reza Darvishi Cheshmeh Soltani ◽  
Ali R. Khataee ◽  
Seyedjamalodin Hashemiyan
Keyword(s):  
Methylene Blue ◽  
Zno Nanoparticles ◽  
Combustion Method ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Photocatalytic Decolorization

scholarly journals Mn-Doped ZnO Nanoparticles Prepared by Solution Combustion Method

2014 ◽  
Vol 12 (0) ◽  
pp. 283-288 ◽  
Author(s):  
Murugesan Silambarasan ◽  
Shanmugam Saravanan ◽  
Tetsuo Soga
Keyword(s):  
Zno Nanoparticles ◽  
Combustion Method ◽  
Solution Combustion ◽  
Solution Combustion Method ◽  
Doped Zno ◽  
Mn Doped
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