scholarly journals Photopolymerized Films with ZnO and Doped ZnO Particles Used as Efficient Photocatalysts in Malachite Green Dye Decomposition

2020 ◽  
Vol 10 (6) ◽  
pp. 1954 ◽  
Author(s):  
Viorica-Elena Podasca ◽  
Mariana-Dana Damaceanu
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Malachite Green ◽  
Photocatalytic Performance ◽  
Composite Films ◽  
High Photocatalytic Activity ◽  
Wastewater Purification ◽  
Malachite Green Dye ◽  
Dye Decomposition ◽  
Zno Particles

Zinc oxide and zinc oxide doped with tin oxide (ZnO-SnO2) particles were synthesized and successfully incorporated into a polymeric matrix by the photopolymerization reaction in the presence of Irg819 as the photoinitiator. The obtained samples were investigated by means of XRD, ESEM/EDX, TEM, FTIR, and Raman spectroscopy. The ZnO particles were obtained in the form of rods agglomerated in flower (or star) structures with lengths of 2–4 μm and widths between 30 and 100 nm, while ZnO-SnO2 samples evolved in the form of cubes, with sides of 350 nm. The prepared composite films with ZnO and ZnO-SnO2 particles were tested in the photocatalytic degradation of malachite green (MG) dye. While the ZnO-based composite film showed a fairly high photocatalytic activity, the hybrid film containing ZnO doped with SnO2 displayed 100% photocatalytic activity after only 45 min of irradiation, being among the most efficient photocatalysts known for MG degradation. In addition, the recycling tests demonstrated that this film displayed high stability during the photocatalysis reaction since no decrease in the photocatalytic performance was noticed after the first three cycles, indicating its suitability for dyes removal and wastewater purification.

THE PREPARATION AND APPLICATION OF MAGNETIC NANOPARTICLES WITH CORE-SHELL STRUCTURE

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1523-1528 ◽  
Author(s):  
ZHEN PENG ◽  
KE-FU YAO ◽  
ZHENHUA LIAO ◽  
WENPENG FU
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Magnetic Nanoparticles ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
High Photocatalytic Activity ◽  
Core Shell ◽  
Economic Consideration ◽  
Wastewater Purification ◽  
The Cost

It is well-known that TiO 2 nanoparticles are highly efficient photocatalysts in decomposing organic substance in wastewater, especially when they are used in suspension state. However, if TiO 2 nanoparticles cannot be withdrawn and reused, it is difficult to apply them in purification of wastewater due to the economic consideration. In present work, TiO 2/ SiO 2/ Fe 3 O 4 core-shell magnetic nanoparticles, constituted by Fe 3 O 4 core, SiO 2 intermediary layer and the TiO 2 out-shell, have been prepared and applied in photocatalytic degradation of a modulated methylene blue containing water. The results indicate that the as-prepared TiO 2/ SiO 2/ Fe 3 O 4 nanoparticles possess high photocatalytic activity and the methylene blue in wastewater can be degraded quickly. Through comparing with the photocatalytic performance of the famous commercial P 25 TiO 2 nanoparticles in the same reaction condition, it has been found that as-prepared TiO 2/ SiO 2/ Fe 3 O 4 nanoparticles exhibit similar photocatalytic activity to commercial P 25 TiO 2 nanoparticles in the photocatalytic degradation of methylene blue containing water. But the TiO 2/ SiO 2/ Fe 3 O 4 nanoparticles used in suspension state can be simply recovered from the liquid by using a magnet or a magnetic field. So the cost of wastewater purification by photocatalytic degradation with TiO 2/ SiO 2/ Fe 3 O 4 nanoparticles can be significantly reduced through reuse of the photocatalyst. It implies that TiO 2/ SiO 2/ Fe 3 O 4 nanoparticles possess the potential for industrial application.

Facile Preparation of Nanoporous SnO2 for Application in Photodegradation of Methylene Blue

2011 ◽  
Vol 194-196 ◽  
pp. 385-388
Author(s):  
Hong Juan Wang ◽  
Feng Qiang Sun ◽  
Ming Zhong Ren ◽  
Qing Wei Guo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
Photochemical Method ◽  
Degussa P25 ◽  
Adsorption Desorption

Nanoporous SnO2with high photocatalytic activity has been successfully prepared by a photochemical method, using SnCl2aqueous solution as a precursor. The as-synthesized sample was characterized by XRD, N2 adsorption-desorption and UV-vis. The photocatalytic activity of the sample was evaluated by degrading methylene blue (MB) aqueous solution under the UV light source and was compared with that of the commercial titania (Degussa P25). The results showed that the produced SnO2can degrade MB solution quickly and has comparative photocatalytic performance with P25 for degrading MB. This facile method supplies an effective way to prepare SnO2photocatalyst.

Controllable synthesis of phosphate-modified BiPO4 nanorods with high photocatalytic activity: surface hydroxyl groups concentrations effects

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 99712-99721 ◽  
Author(s):  
Yan Li ◽  
Yawen Wang ◽  
Yu Huang ◽  
Junji Cao ◽  
Wingkei Ho ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Photocatalytic Performance ◽  
High Photocatalytic Activity ◽  
Hydroxyl Groups ◽  
Controllable Synthesis ◽  
Surface Hydroxyl ◽  
Methylene Orange ◽  
Surface Hydroxyl Groups

Surface modification by phosphate efficiently improves the photocatalytic performance of BiPO4 for the degradation of methylene orange (MO), by enhancing the concentration of surface hydroxyl groups and improving its hydrophilicity.

Fluorine doped zinc oxide nanowires: Enhanced photocatalysts degrade malachite green dye under visible light conditions

2016 ◽  
Vol 42 (4) ◽  
pp. 4672-4678 ◽  
Author(s):  
Mohammad W. Kadi ◽  
David McKinney ◽  
Reda M. Mohamed ◽  
Ibraheem. A. Mkhalid ◽  
Wolfgang Sigmund
Keyword(s):  
Zinc Oxide ◽  
Visible Light ◽  
Malachite Green ◽  
Light Conditions ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires ◽  
Malachite Green Dye

scholarly journals Synthesis and Characterization of Nickel Cobalt Vanadate (NiCo2V2O8) Nanostructures: Photocatalytic and Supercapacitor Applications

2021 ◽  
Vol 33 (11) ◽  
pp. 2831-2838
Author(s):  
Lakshmana Naik R. ◽  
T. Bala Narsaiah ◽  
C.R. Ravikumar ◽  
A. Naveen Kumar ◽  
K. Vinutha ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Transition Metal ◽  
Malachite Green ◽  
Electrochemical Behaviour ◽  
Specific Capacity ◽  
Photocatalytic Property ◽  
Ultra Violet ◽  
Hydrothermal Route ◽  
Malachite Green Dye ◽  
Nickel Cobalt

With the emerging newer energy storage applications, transition metal vanadates are booming up as better catalysts. Among all the transition metal vanadates, nickel cobalt vanadate nanomaterials (NiCo2V2O8 NP), are being considered as a promising material with electrocatalytic and photocatalytic activity. In this article, the synthesis of circular and ovular structured NiCo2V2O8 nanostructures by the hydrothermal route without using any capping agent is reported. The crystallinity, physical structure and morphology of the prepared nanomaterial were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy. The photocatalytic property of NiCo2V2O8 nanostructures was studied by decolorizing industrially hazardous dye such as malachite green dye under ultra-violet light conditions for a regular interval of time (10 min) up to 60 min. The experiments showed decolorization efficiencies as 52.43 for malachite green dye. The electrochemical behaviour of the prepared compound was studied and energy specific capacity was elucidated as 218.4 F g-1 with high reversibility property the material. The NiCo2V2O8 nanostructures showed better electrochemical activity and photocatalytic activity, which could be utilized for supercapacitor and pollutant remediation applications.

Preparation of p-p heterojunction and its photocatalytic performance by 3D NiS supported by 2D lamellar CuMn-LDO

2021 ◽  
Author(s):  
Ye Liu ◽  
Jing Xu ◽  
Zhenlu Liu ◽  
Xinyu Liu ◽  
Shengming Xu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
High Photocatalytic Activity

Ni-based nanomaterials have attracted extensive concern as photocatalysts thanks to their high photocatalytic activity and non-toxicity. In this study, a novel visible light induced photocatalyst CuMn-LDO/NiS (CMS) was successfully synthesized...

Photocatalytic Degradation of Humic Acid Using Fe3+ and N-Doped 3SnO2/TiO2 Thin Films Coated on Glass Fibers

2014 ◽  
Vol 608 ◽  
pp. 164-169
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Humic Acid ◽  
Glass Fibers ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
High Photocatalytic Activity ◽  
Coating Methods ◽  
Uv Lamp

The Fe3+ and N–doped 3SnO2/TiO2 composite thin films and undoped films coated on glass fibers were prepared by sol–gel and dip–coating methods. The films were calcined at 600°C for 2 hour and characterized by XRD, SEM, EDS and XPS. The photocatalytic activity of the coated glass fibers was determined by means of degradation of a methylene blue (MB) solution and humic acid (HA). It was found that the optimized 20N/3SnO2/TiO2composite films exhibit a high photocatalytic activity and HA could be rapidly removed from water. The main factor affecting the HA degradation of 20N/3SnO2/TiO2 films is quantity of glass fibers loading, irradiation power of UV lamp and flow rate of water.

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