Promoting Photocatalytic Performance of ZnO Particles by Photochemically Reducing Ag+on the Particle Surfaces

2014 ◽  
Vol 33 (2) ◽  
pp. 197-203 ◽  
Author(s):  
Hsuan-Fu Yu ◽  
Dong-Wei Qian
Keyword(s):  
Photocatalytic Performance ◽  
Zno Particles

Synthesis of ZnO Particles by Parallel Flow Precipitation Hydrothermal Process and their Photocatalytic Performance

2016 ◽  
Vol 49 (2) ◽  
pp. 191-196 ◽  
Author(s):  
Qingming Meng ◽  
Jian Wang ◽  
Zhen Ma ◽  
Baodong Zhu ◽  
Jianwei Zhang
Keyword(s):  
Photocatalytic Performance ◽  
Hydrothermal Process ◽  
Parallel Flow ◽  
Zno Particles

scholarly journals Toward the development of polyethylene photocatalytic degradation

2020 ◽  
Vol 40 (2) ◽  
pp. 181-191 ◽  
Author(s):  
Parisa Kamalian ◽  
Saied Nouri Khorasani ◽  
Amir Abdolmaleki ◽  
Mehdi Karevan ◽  
Shahla Khalili ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Photocatalytic Performance ◽  
Nanocomposite Films ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Test Results ◽  
Zno Particles

AbstractIn this research, the photocatalytic degradation performance in a commercial low-density polyethylene (LDPE) film was investigated in the presence of zinc oxide (ZnO) nanoparticles grafted with two amounts of polyacrylamide. Fourier-transform infrared spectroscopy (FTIR) besides thermogravimetric analysis (TGA) test results reinforced the successful grafting of polyacrylamide to the extent of 10 and 39 wt.% on the ZnO nanoparticles. The photocatalytic degradation of the films under ultraviolet (UV) radiation was evaluated by characterizing the mechanical properties, weight loss, and morphology. The UV absorption and emission for ZnO nanoparticles were increased after grafting with 10% polyacrylamide. The tensile strength of the nanocomposite films increased with the incorporation of nanoparticles. The presence of ZnO nanoparticles in LDPE films increased the rate of degradation after 200 h of irradiation. The polyacrylamide grafting improved the dispersion of ZnO particles in LDPE matrix, whereas the increase of grafting extent from 10 to 39 wt.% reduced the photocatalytic performance of ZnO nanoparticles.

Preparation and Photocatalytic Properties on ZnO/TiO2 Nanotubes

2013 ◽  
Vol 562-565 ◽  
pp. 775-780
Author(s):  
Yang Lin Liu ◽  
Xue Chen Duan ◽  
Yao Ming Li ◽  
Yan Yan Liu
Keyword(s):  
Tio2 Nanotubes ◽  
Photocatalytic Performance ◽  
Atomic Ratio ◽  
Ethanol Solution ◽  
Composite Particles ◽  
Nano Composite ◽  
Characterization Methods ◽  
Zno Particles ◽  
Highly Dispersed ◽  
Sodium Hydrate

In order to study on the effect of the content of Zn to phase morphology and photocatalytic performance of ZnO/TiO2 composite material, we prepare ZnO particle finishing with surface chemistry and make tubular TiO2 with hydrothermal. Using characterization methods like XRD,SEM,TEM to explore how various conditions such as different incineration temperature, atomic ratio, etc can interfere with morphology, structure and photocatalytic performance of composite. In this experiment, the surface of TiO2 nanotubes combusted under the temperature of 673K for 2h are smooth;Zn:TiO2=1:4 to achieve uniformly and firmly distributed nano composite particles which grain size is 11nm on the surface of TiO2 nanotubes,including 2-3nm ZnO particles on tubes; 0.1mol/L sodium hydrate-ethanol solution as precipitant to obtain ZnO/tubular TiO2 composite materials which are highly dispersed and deposited on the surface of tube-shaped TiO2; Zn:Ti=1:4 reach the best catalytic result.

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.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

Hydrothermal/Solvothermal Synthesis and Photocatalytic Performance of ZnS Microspheres

2016 ◽  
Vol 31 (5) ◽  
pp. 473 ◽  
Author(s):  
WU Xuan-Rong ◽  
YANG Qiao-Zhen ◽  
ZHAO Yong-Xiang ◽  
LU Yan-Luo
Keyword(s):  
Solvothermal Synthesis ◽  
Photocatalytic Performance

Growth Kinetics of Quantum Size ZnO Particles

1998 ◽  
Vol 536 ◽  
Author(s):  
E. M. Wong ◽  
J. E. Bonevich ◽  
P. C. Searson
Keyword(s):  
Growth Kinetics ◽  
Ostwald Ripening ◽  
Chemical Potential ◽  
Colloidal Suspensions ◽  
Green Emission ◽  
Blue Shift ◽  
Constant Current ◽  
Mass Model ◽  
Zno Particles ◽  
Kinetics Of

AbstractColloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. The particle aging kinetics were determined by monitoring the optical band edge absorption and using the effective mass model to approximate the particle size as a function of time. We show that the growth kinetics of the ZnO particles follow the Lifshitz, Slyozov, Wagner theory for Ostwald ripening. In this model, the higher curvature and hence chemical potential of smaller particles provides a driving force for dissolution. The larger particles continue to grow by diffusion limited transport of species dissolved in solution. Thin films were fabricated by constant current electrophoretic deposition (EPD) of the ZnO quantum particles from these colloidal suspensions. All the films exhibited a blue shift relative to the characteristic green emission associated with bulk ZnO. The optical characteristics of the particles in the colloidal suspensions were found to translate to the films.

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