scholarly journals Photodegradation Process of Organic Dyes in the Presence of a Manganese-Doped Zinc Sulfide Nanowire Photocatalyst

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5840
Author(s):  
Adam Żaba ◽  
Svitlana Sovinska ◽  
Tetiana Kirish ◽  
Adam Węgrzynowicz ◽  
Katarzyna Matras-Postołek
Keyword(s):  
Photocatalytic Degradation ◽  
Zinc Sulfide ◽  
Organic Dyes ◽  
Synthesis Method ◽  
Visible Region ◽  
Degradation Process ◽  
Single Step ◽  
Radiation Process ◽  
Uv Lamp ◽  
Mn Doped

Zinc sulfide (ZnS) nanowires represent a promising candidate in many fields, including optoelectronics and photocatalysis because of their advantages such as excellent optical properties, chemical stability and an easy-scalable simple synthesis method. In this study, an energy-friendly microwave radiation process was used to develop the single-step, solvothermal process for the growth of manganese-doped zinc sulfide (ZnS) and undoped nanocrystals (NCs) in the forms of nanowires using two short amines as a stabilizer, e.g., ethylenediamine and hydrazine, respectively. ZnS nanowires doped with Mn atoms show absorbance in UV and in the visible region of the spectrum. The photocatalytic degradation of rhodamine B in the presence of Mn-doped and undoped ZnS nanocrystals illuminated with only a 6-W UV lamp has been comprehensively studied. The effect of Mn doping and the presence of a nanocrystal stabilizer on the degradation process was determined. It was found that the efficiency of a photocatalytic degradation process was strongly affected by both factors: the doping process of nanowires with Mn2+ atoms and the attachment of ligands to the nanocrystal surface.

Synthesis and Characterization of WO3and#183;0.33H2O/Ag2MoO4 Composites as a Visible-Light-Driven Photocatalyst for Rhodamine B and Levofloxacin Degradation

2020 ◽  
Vol 42 (6) ◽  
pp. 827-827
Author(s):  
Yun Xuan Fu Yun Xuan Fu ◽  
Yan Li Yan Li ◽  
Tian Long Chang Tian Long Chang ◽  
Xu Tao Liu Xu Tao Liu ◽  
Xiang Feng Wu Xiang Feng Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Organic Dyes ◽  
Degradation Process ◽  
Molar Ratio ◽  
Leading Role ◽  
Visible Light Driven

Visible-light-driven WO3and#183;0.33H2O/Ag2MoO4 composites have been prepared by using an in-situ growth of Ag2MoO4 nanoparticles on the surfaces of WO3and#183;0.33H2O. The photocatalytic activities of the samples were studied by degradation of rhodamine B and levofloxacin dilute solution. The synergistic photocatalytic mechanism was also analyzed. Experimental results reveal that the as-developed hybrids have higher photocatalytic activity than pure samples. When the theoretical molar ratio of WO3and#183;0.33H2O to Na2MoO4and#183;2H2O is 1:0.15, the as-developed hybrids have the highest photocatalytic degradation efficiency of 99.0% for rhodamine B in 45 min and 40.9% for levofloxacin in 120 min. Furthermore, there are chemical bonds between WO3and#183;0.33H2O and Ag2MoO4. In addition, the super oxide radicals play the leading role during the photocatalytic degradation process of the samples. This work will provide reference for treatment of organic dyes and antibiotics pollution in water with using solar energy.

scholarly journals Inspired Preparation of Zinc Oxide Nanocatalyst and the Photocatalytic Activity in the Treatment of Methyl Orange Dye and Paraquat Herbicide

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Ghaida H. Munshi ◽  
Amal M. Ibrahim ◽  
Laila M. Al-Harbi
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Analytical Techniques ◽  
Degradation Process ◽  
Naturally Occurring ◽  
Uv Lamp ◽  
Degradation Of Methyl Orange

As the need to use green chemistry routes increases, environmentally friendly catalytic processes are a demand. One of the most important and abundant naturally occurring catalysts is chlorophyll. Chlorophyll is the first recognized catalyst; it is a reducing agent due to its electron-rich structure. The effects of spinach on the preparation of zinc oxide nanoparticles and the photocatalytic degradation of methyl orange and paraquat in sunlight and under a UV lamp and photocatalytic degradation in sunlight were studied. Different parameters of the catalytic preparation process and photocatalytic degradation process were studied. Characterization of differently prepared samples was carried out using different analytical techniques such as XRD, SEM, and EDX and finally the photocatalytic activity towards decomposition of methyl orange and paraquat.

scholarly journals Aegle marmelosMediated Green Synthesis of Different Nanostructured Metal Hexacyanoferrates: Activity against Photodegradation of Harmful Organic Dyes

Scientifica ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Vidhisha Jassal ◽  
Uma Shanker ◽  
B. S. Kaith
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Degradation ◽  
Organic Dyes ◽  
Degradation Process ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Metal Hexacyanoferrate

Prussian blue analogue potassium metal hexacyanoferrate (KMHCF) nanoparticles Fe4[Fe(CN)6]3(FeHCF), K2Cu3[Fe(CN)6]2(KCuHCF), K2Ni[Fe(CN)6]·3H2O (KNiHCF), and K2Co[Fe(CN)6] (KCoHCF) have been synthesized using plant based biosurfactantAegle marmelos(Bael) and water as a green solvent. It must be emphasized here that no harmful reagent or solvent was used throughout the study. Plant extracts are easily biodegradable and therefore do not cause any harm to the environment. Hence, the proposed method of synthesis of various KMHCF nanoparticles followed a green path. The synthesized nanoparticles were characterized by powder X-ray diffraction (PXRD), Field-Emission Scanning Electron Microscopy (FE-SEM), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared Spectroscopy (FT-IR). MHCF nanoparticles were used for the photocatalytic degradation of toxic dyes like Malachite Green (MG), Eriochrome Black T (EBT), Methyl Orange (MO), and Methylene Blue (MB). Under optimized reaction conditions, maximum photocatalytic degradation was achieved in case of KCuHCF nanoparticles mediated degradation process (MG: 96.06%, EBT: 83.03%, MB: 94.72%, and MO: 63.71%) followed by KNiHCF (MG: 95%, EBT: 80.32%, MB: 91.35%, and MO: 59.42%), KCoHCF (MG: 91.45%, EBT: 78.84%, MB: 89.28%, and MO: 58.20%).

Aggregation-induced preparation of ultrastable zinc sulfide colloidal nanospheres and their photocatalytic degradation of multiple organic dyes

2015 ◽  
Vol 17 (22) ◽  
pp. 14532-14541 ◽  
Author(s):  
Wanting Yang ◽  
Xiaoli Liu ◽  
Dong Li ◽  
Louzhen Fan ◽  
Yunchao Li
Keyword(s):  
Photocatalytic Degradation ◽  
Zinc Sulfide ◽  
Colloidal Stability ◽  
Photocatalytic Performance ◽  
Organic Dyes ◽  
Size Dependent

By utilizing an in situ aggregation strategy, we prepared medium-sized ZnS nanospheres with excellent colloidal stability, which demonstrated a size-dependent photocatalytic performance toward the photodegradation of a single dye and binary mixed dyes.

Structural transformation in Bi2O3 and its application for photocatalytic degradation of organic dyes

2020 ◽  
Author(s):  
Kaviyapriya Kirubanithy ◽  
Jayaraj Santhosh Kumar ◽  
Rosalin Beura ◽  
Paramasivam Thangadurai
Keyword(s):  
Photocatalytic Degradation ◽  
Structural Transformation ◽  
Organic Dyes

Rapid photocatalytic degradation of cationic organic dyes using Li-doped Ni/NiO nanocomposites and their electrochemical performance

2021 ◽  
Author(s):  
R. Ranjitha ◽  
K. N. Meghana ◽  
V. G. Dileep Kumar ◽  
Aarti S. Bhatt ◽  
B. K. Jayanna ◽  
...  
Keyword(s):  
Energy Storage ◽  
Water Treatment ◽  
Electrochemical Performance ◽  
Photocatalytic Degradation ◽  
Organic Dyes

This work reports novel bi-functional Li-doped Ni/NiO nanocomposites as potential candidates for energy storage and water treatment applications.

Binary MOF of iron and copper for treating ciprofloxacin contaminated waste water by integrated technique of adsorption and photocatalytic degradation

2021 ◽  
Author(s):  
Aditi Chatterjee ◽  
Amiya K Jana ◽  
Jayanta Kumar Basu
Keyword(s):  
Waste Water ◽  
Water Pollution ◽  
Photocatalytic Degradation ◽  
Metal Organic Framework ◽  
Single Step ◽  
New Approach ◽  
Metal Organic ◽  
Integrated Technique ◽  
Contaminated Waste ◽  
Control Water

Adsorption assisted photocatalysis is a new approach to control water pollution. A novel metal organic framework MIL 53(Fe-Cu) was formulated by a single step solvothermal route. The newly developed MOF...

Photocatalytic degradation of organic dyes by Er3+: YAlO3/Co- and Fe-doped ZnO coated composites under solar irradiation

2016 ◽  
Vol 90 (13) ◽  
pp. 2654-2664 ◽  
Author(s):  
Yang Chen ◽  
Chunxiao Lu ◽  
Liang Tang ◽  
Yahui Song ◽  
Shengnan Wei ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Dyes ◽  
Solar Irradiation ◽  
Doped Zno
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