| 1. |
- Baruah, Sunandan, et al.
(författare)
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Development of a visible light active photocatalytic portable water purification unit using ZnO nanorods
- 2012
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Ingår i: Catalysis Science & Technology. - 2044-4753 .- 2044-4761. ; 2:5, s. 918-921
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Tidskriftsartikel (refereegranskat)abstract
- A ZnO nanorods based water purification unit was designed which operates with solar energy as the source of activation. The purifier was tested on two model bacteria Escherichia coli and Staphylococcus aureus with concentration as high as 1010 colony forming units (CFU) per litre, which is about 105 times higher than the bacterial concentration in tap water. Up to 99% (0.99 × 1010 CFU L−1) removal of viable bacterial cells was achieved under sunlight activation.
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| 2. |
- Baruah, Sunandan, et al.
(författare)
-
Development of a visible light active photocatalytic portable water purification unit using ZnO nanorods
- 2012
-
Ingår i: Catalysis Science & Technology. - : Royal Society of Chemistry (RSC). - 2044-4753 .- 2044-4761. ; 2:5, s. 918-921
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Tidskriftsartikel (refereegranskat)abstract
- A ZnO nanorods based water purification unit was designed which operates with solar energy as the source of activation. The purifier was tested on two model bacteria Escherichia coli and Staphylococcus aureus with concentration as high as 10(10) colony forming units (CFU) per litre, which is about 10(5) times higher than the bacterial concentration in tap water. Up to 99% (0.99 x 10(10) CFU L-1) removal of viable bacterial cells was achieved under sunlight activation.
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| 3. |
- Danwittayakul, Supamas, et al.
(författare)
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Efficient solar photocatalytic degradation of textile wastewater using ZnO/ZTO composites
- 2015
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Ingår i: Applied Catalysis B: Environmental. - : Elsevier. - 0926-3373. ; 163, s. 1-8
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Tidskriftsartikel (refereegranskat)abstract
- Zinc oxide/zinc tin oxide (ZnO/ZTO) nanocomposites were synthesized on porous ceramic support using a simple and economical hydrothermal technique for photocatalytic degradation of organic dyes. One dimensional ZnO nanorods were grown epitaxially on ZnO nanoparticles seeded substrates in a chemical bath with different growth solution concentrations followed by the synthesis of zinc tin oxide (ZTO) in an autoclave. Comparison of photocatalytic activity of pure ZnO nanorod catalysts with different dimensions on the degradation of methylene blue showed that ZnO nanorods (ZnO20 mM) with the highest specific surface area (45 m(2) g(-1)) are 13% more active than those with lower surface areas ZnO nanorod catalysts (ZnO1 mM, ZnO5 mM and ZnO10 mM; 20-39 m(2) g(-1)). To further enhance photocatalytic activity, we composited ZnO with ZTO and found that ZnO/15ZTO can be a better photocatalyst improving 16% degradation efficiency attributed to the reduction of electron-hole recombination by charge carrier separation in the composites. Moreover, ZnO/15ZTO showed 50% Photocatalytic degradation efficiency and 77% COD removal of textile waste water when irradiated by sunlight. ZnO/ZTO monolith shows much promise to be an attractive photocatalyst for solar photocatalytic application.
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| 4. |
- Jaisai, Mayuree, et al.
(författare)
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Paper modified with ZnO nanorods–antimicrobial studies
- 2012
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Ingår i: Beilstein Journal of Nanotechnology. - : BEILSTEIN-INSTITUT. - 2190-4286. ; 3:1, s. 684-691
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Tidskriftsartikel (refereegranskat)abstract
- Paper with antimicrobial properties was developed through in situ growth of ZnO nanorods. The targeted application for this type of paper is in health centers as wallpaper, writing paper, facemasks, tissue paper, etc. The paper was tested on three model microbes, Gram-positive bacteria Staphylococcus aureus, Gram-negative bacteria Escherichia coli and common airborne fungus Aspergillus niger. No viable bacterial colonies or fungal spores could be detected in the areas surrounding test samples of the antimicrobial paper. Gram-negative bacteria Escherichia coli were found to be inhibited in an area that is 239% and 163% the area of the paper sample under different room lighting conditions, i.e., halogen and fluorescent lamp illumination, respectively. For Gram-positive bacteria Staphylococcus aureus the zones of inhibition surrounding the paper samples are 102% and 70%, and for Aspergillus niger, 224% and 183% of the sample area, under similar lighting conditions.
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