Optical and Photoconductive Response of CuO Nanostructures Grown by a Simple Hot-Water Treatment Method

2018 ◽  
Vol 122 (41) ◽  
pp. 23312-23320 ◽  
Author(s):  
Khalidah H. Al-Mayalee ◽  
Nawzat Saadi ◽  
Emad Badradeen ◽  
Fumiya Watanabe ◽  
Tansel Karabacak
Keyword(s):  
Water Treatment ◽  
Treatment Method ◽  
Hot Water ◽  
Hot Water Treatment

Zinc Oxide Nanostructures Synthesized by a Simple Hot Water Treatment Method for Photocatalytic Degradation of Organic Pollutants in Water

MRS Advances ◽  
2020 ◽  
pp. 1-9
Author(s):  
Ranjitha Kumarapuram Hariharalakshmanan ◽  
Nawzat S. Saadi ◽  
Busra Ergul-Yilmaz ◽  
Khalidah H. Al – Mayalee ◽  
Tansel Karabacak
Keyword(s):  
Water Treatment ◽  
Uv Light ◽  
Treatment Method ◽  
Zinc Powder ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Zno Nanostructures ◽  
Zno Nanostructure ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures

Abstract The use of zinc oxide (ZnO) nanostructures as a photocatalyst for the degradation of organic pollutants in water has received significant attention over the recent years. However, synthesis methods for producing ZnO nanostructures are generally costly, complicated, and hazardous to the environment. In this work, we demonstrate the synthesis of ZnO nanostructures by a simple hot water treatment (HWT) method and the photocatalytic activity of the hence produced nanostructures. HWT is a one-step, low-cost, eco-friendly, and scalable nanostructure growth method. By HWT, various metal-oxide nanostructures can be produced simply by the interaction of metals with hot water without the need for any chemical additives in the solution. Growth of metal-oxide nanostructures by HWT involves the formation of metal-oxides and their release from the surface of the metal into water, the migration of the metal-oxides in water, and their re-deposition at a different part of the metallic surface, which initiates the growth of nanostructures. In this study, we used zinc powder and plates for producing the ZnO nanostructures by HWT in DI water at 75°C. Scanning electron microscopy and X-ray diffraction were utilized to verify the formation of ZnO nanostructures. Zinc plates produced a suspension of ZnO nanostructures in water, while on the other hand, zinc powder resulted in ZnO nanostructures grown on the powder surface as well as standalone ZnO nanostructures also mixed in water. We used these nanostructures + water suspensions for our photocatalytic degradation studies. Methylene blue (MB) was used as a model organic pollutant. We mixed the ZnO nanostructure suspension with MB and exposed it to UV light. The degradation of MB was observed by measuring its absorbance values using a UV-Visible spectrophotometer over a period of 4 hours. We observed a 20% decrease in the concentration of MB in 4 hours when nanostructured Zn/ZnO powder suspension was used, and a 30% decrease was achieved when ZnO nanostructure-only suspension produced from zinc plates was used. MB alone was also exposed to UV light for the same period as a control experiment, and we did not observe any significant decrease in its concentration. These results indicate that the hot water treatment method presents a very simple, cost-effective, scalable, and eco–friendly alternative for the synthesis of ZnO nanostructures for photocatalytic water treatment applications.

Silver nanoparticles eliminate Xanthomonas campestris pv. campestris in cabbage seeds more efficiently than hot water treatment

2021 ◽  
Vol 27 ◽  
pp. 102284
Author(s):  
Jakub Pečenka ◽  
Zuzana Bytešníková ◽  
Tomáš Kiss ◽  
Eliška Peňázová ◽  
Miroslav Baránek ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Water Treatment ◽  
Xanthomonas Campestris ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Xanthomonas Campestris Pv Campestris

Nanostructured antibacterial aluminum foil produced by hot water treatment against E. coli in meat

MRS Advances ◽  
2021 ◽  
Author(s):  
Quinshell Smith ◽  
Kenneth Burnett ◽  
Nawzat Saadi ◽  
Khulud Alotaibi ◽  
Atikur Rahman ◽  
...  
Keyword(s):  
Water Treatment ◽  
Aluminum Foil ◽  
Hot Water ◽  
Hot Water Treatment ◽  
E Coli

scholarly journals Morphological Study of Zinc-Oxide Nanorods Grown by Hot Water Treatment Suitable for Solar Cells Conversion Efficiency Enhancement

2020 ◽  
Author(s):  
Mohammad Khairul Basher ◽  
S. M. Shah Riyadh ◽  
Md. Khalid Hossain ◽  
Mahmudul Hassan ◽  
Md. Abdur Rafiq Akand ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Solar Cells ◽  
Water Treatment ◽  
Conversion Efficiency ◽  
Zno Nanorods ◽  
Hot Water ◽  
Zinc Oxide Nanorods ◽  
Hot Water Treatment ◽  
Time Duration ◽  
Zinc Surface

Zinc-oxide (ZnO) nanostructures including nanorods are currently considered as a pioneer research of interest world-wide due to their excellent application potentials in various applied fields especially for the improvement of energy harvesting photovoltaic solar cells (PSC). We report on the growth and morphological properties of zinc-oxide (ZnO) nanorods grown on the surface of plain zinc (non-etched and chemically etched) plates by using a simple, economical, and environment-friendly technique. We apply hot water treatment (HWT) technique to grow the ZnO nanorods and varies the process parameters, such as temperature and the process time duration. The morphological, and elemental analysis confirm the agglomeration of multiple ZnO nanorods with its proper stoichiometry. The obtained nanostructures for different temperatures with different time duration showed the variation in uniformity, density, thickness and nanonorods size. The ZnO nanorods produced on the etched zinc surface were found thicker and uniform as compared to those grown on the non-etched zinc surface. This chemically etched Zinc plates preparation can be an easy solution to grow ZnO nanorods with high density and uniformity suitable for PSC applications such as to enhance the energy conversion efficiency of the photovoltaic (PV) solar cells towards the future sustainable green earth.

scholarly journals Susceptibility of Some Sugarcane Varieties to the Heat Treatment Used in the Control of Chlorotic Streak

1969 ◽  
Vol 40 (1) ◽  
pp. 67-69
Author(s):  
José Adsuar
Keyword(s):  
Heat Treatment ◽  
Puerto Rico ◽  
Water Treatment ◽  
Virus Disease ◽  
Germination Percentage ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Agricultural Experiment Station ◽  
Sugarcane Varieties ◽  
Agricultural Experiment

Chlorotic streak, a virus disease of sugarcane, is known to occur in Puerto Rico and to cause a reduction in germination, tillering, and yield of sugarcane per acre. Immersion of the infected cane in hot water at 52° C. for 20 minutes inactivated the virus and increased the yield of cane and sugar. It is also known that the hot-water treatment may adversely affect the germination of the different varieties. Thirteen of the best sugarcane varieties as recommended by this Agricultural Experiment Station were tested for susceptibility to the hot-water treatment. The treatment adversely affected the germination percentage of M. 336, B. 41227, and Co. 281. It stimulated the germination of varieties H. 328560, P.R. 1000, B. 37161, B. 40105, B. 37172, B. 371933, P.R. 907, and P.R. 902. It had no significant effect on the germination of P.R. 905 and P.R. 980.

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