Impact of Anionic Dopant Precursor on Nanostructured ZnO thin Films Surface Morphologies

2020 ◽  
Vol 42 (5) ◽  
pp. 713-713
Author(s):  
Arshid Mahmood Ali Arshid Mahmood Ali ◽  
Aishah Mahpudz Aishah Mahpudz ◽  
Usman Saeed Usman Saeed ◽  
Sami U Rather Sami U Rather ◽  
Ayyaz M Nawaz Javaid A and Hui Zhang Ayyaz M Nawaz Javaid A and Hui Zhang
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrothermal Solution ◽  
Ph Control ◽  
Reaction Rate Constant ◽  
Zno Thin Films ◽  
Doped Zno ◽  
Surface Morphologies ◽  
The Impact

The aim of this study is to investigate the impact of an anionic precursor [N2 gas and triethyleneamine (TEA) as nitrogen dopant source] to prepare anionic doped ZnO thin films surface morphologies, via a novel route - hydrothermal solution deposition at low temperature. The effect of dopant concentration under both with and without pH control was studied. The less populated doped ZnO crystal nearly had the same band gap as compared to undoped ZnO thin films. The photocatalytic activity of selected doped ZnO thin films were studied for the degrdation of 10 mg L-1 Methylene Blue under UV irradiation of 254nm. Based on the 1st order reaction rate constant results the morphology N2:S2-MS has shown highest degradation followed by N:S1-MS. Overall, the photocatalytic activity order is N2:S2-MS andgt; N:S1-MS andgt; N:S2-CG andgt; N:S1-CG. In general, a significant variation in surface morphologies, crystal size and population, porosity and orientation were observed. This tailored-made variation enabled the doped ZnO thin films to successfully degrade the waste methylene blue effluents.

scholarly journals Physical and photocatalytic properties of sprayed Dy doped ZnO thin films under sunlight irradiation for degrading methylene blue

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 24917-24925
Author(s):  
G. El Fidha ◽  
N. Bitri ◽  
F. Chaabouni ◽  
S. Acosta ◽  
F. Güell ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Spray Pyrolysis ◽  
Photocatalytic Properties ◽  
Zno Thin Films ◽  
Sunlight Irradiation ◽  
Doped Zno

Dysprosium-doped zinc oxide (ZnO) thin films prepared through spray pyrolysis show outstanding photocatalytic activity for the degradation of methylene blue.

Preparation and photocatalytic activity of Cu-doped ZnO thin films prepared by the sol–gel method

2012 ◽  
Vol 258 (20) ◽  
pp. 8192-8198 ◽  
Author(s):  
P. Jongnavakit ◽  
P. Amornpitoksuk ◽  
S. Suwanboon ◽  
N. Ndiege
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Doped Zno

scholarly journals Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
William Vallejo ◽  
Alvaro Cantillo ◽  
Carlos Díaz-Uribe
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Raman Spectroscopy ◽  
Photocatalytic Degradation ◽  
Physicochemical Characterization ◽  
Zno Thin Films ◽  
Visible Range ◽  
X Ray ◽  
Visible Irradiation ◽  
Doped Zno

This study synthesized and characterized Ag-doped ZnO thin films. Doped ZnO powders were synthesized using the sol-gel method, and thin films were fabricated using the doctor blade technique. The Ag content was determined by optical emission spectrometers with inductively coupled plasma (ICP plasma). Additionally, X-ray diffraction, Raman spectroscopy, Atomic Force Microscopy (AFM), diffuse reflectance, and X-ray photoelectron spectroscopy (XPS) measurements were used for physicochemical characterization. Finally, the photocatalytic degradation of methylene blue (MB) was studied under visible irradiation in aqueous solution. The Langmuir-Hinshelwood model was used to determine the reaction rate constant of the photocatalytic degradation. The physicochemical characterization showed that the samples were polycrystalline, and the diffraction signals corresponded to the ZnO wurtzite crystalline phase. Raman spectroscopy verified the ZnO doping process. The AFM analysis showed that roughness and grain size were reduced after the doping process. Furthermore, the optical results indicated that the presence of Ag improved the ZnO optical properties in the visible range, and the Ag-doped ZnO thin films had the lowest band gap value (2.95 eV). Finally, the photocatalytic degradation results indicated that the doping process enhanced the photocatalytic activity under visible irradiation, and the Ag-doped ZnO thin films had the highest MB photodegradation value (45.1%), as compared to that of the ZnO thin films (2.7%).

Solar photocatalytic activity of sol–gel prepared Ag-doped ZnO thin films

2013 ◽  
Vol 52 (13-15) ◽  
pp. 2601-2608 ◽  
Author(s):  
Mohamed I. Badawy ◽  
F.A. Mahmoud ◽  
Ahmed A. Abdel-Khalek ◽  
Tarek A. Gad-Allah ◽  
A.A. Abdel Samad
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Doped Zno ◽  
Solar Photocatalytic Activity

Enhanced the photocatalytic activity of Ni-doped ZnO thin films: Morphological, optical and XPS analysis

2016 ◽  
Vol 94 ◽  
pp. 108-118 ◽  
Author(s):  
M.Sh. Abdel-wahab ◽  
Asim Jilani ◽  
I.S. Yahia ◽  
Attieh A. Al-Ghamdi
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Zno Thin Films ◽  
Xps Analysis ◽  
Doped Zno

Growth of the Sol-Gel Based ZnO:Al Thin Films with High Doping Concentration

2012 ◽  
Vol 485 ◽  
pp. 144-148
Author(s):  
Jian Lin Chen ◽  
Yan Jie Ren ◽  
Jian Chen ◽  
Jian Jun He ◽  
Ding Chen
Keyword(s):  
Thin Films ◽  
Doping Concentration ◽  
Sol Gel ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
High Doping Concentration ◽  
Doped Zno ◽  
Surface Morphologies

Preferentially oriented Al-doped ZnO thin films with doping concentration of 1, 2, 3, 5 and 10 mol% respectively were prepared on glass substrates via sol-gel route. The crystallinity of films was characterized by X-ray diffraction and the surface morphologies were observed by scanning electron microscopy. The results show that ZnO:Al films at low doping concentration (1, 2 mol%) grow into dense homogenous microstructure. However, as for high doping concentration (3, 5, 10 mol%), Al3+ precipitate in the form of amorphous Al2O3 and ZnO:Al films exhibit heterogeneous nucleation and exceptional growth of the big plate-like crystals at the interface of the amorphous Al2O3 and ZnO:Al matrix.

Novel sol-gel synthesis of cerium-doped ZnO thin films for photocatalytic activity

2012 ◽  
Author(s):  
S. Senthilvelan ◽  
V. L. Chandraboss ◽  
B. Karthikeyan ◽  
M. Murugavelu ◽  
B. Loganathan ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Doped Zno ◽  
Sol Gel Synthesis
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