scholarly journals Enhanced photocatalytic activity of Ag–ZnO hybrid plasmonic nanostructures prepared by a facile wet chemical method

2014 ◽  
Vol 5 ◽  
pp. 639-650 ◽  
Author(s):  
Sini Kuriakose ◽  
Vandana Choudhary ◽  
Biswarup Satpati ◽  
Satyabrata Mohapatra
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Chemical Method ◽  
Hybrid Nanostructures ◽  
Oriented Attachment ◽  
Plasmonic Nanostructures ◽  
Ag Nanoparticle ◽  
Wet Chemical Method ◽  
Citrate Concentration ◽  
Wet Chemical

We report the synthesis of Ag–ZnO hybrid plasmonic nanostructures with enhanced photocatalytic activity by a facile wet-chemical method. The structural, optical, plasmonic and photocatalytic properties of the Ag–ZnO hybrid nanostructures were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), photoluminescence (PL) and UV–visible absorption spectroscopy. The effects of citrate concentration and Ag nanoparticle loading on the photocatalytic activity of Ag–ZnO hybrid nanostructures towards sun-light driven degradation of methylene blue (MB) have been investigated. Increase in citrate concentration has been found to result in the formation of nanodisk-like structures, due to citrate-assisted oriented attachment of ZnO nanoparticles. The decoration of ZnO nanostructures with Ag nanoparticles resulted in a significant enhancement of the photocatalytic degradation efficiency, which has been found to increase with the extent of Ag nanoparticle loading.

scholarly journals Structural, optical and photocatalytic properties of flower-like ZnO nanostructures prepared by a facile wet chemical method

2013 ◽  
Vol 4 ◽  
pp. 763-770 ◽  
Author(s):  
Sini Kuriakose ◽  
Neha Bhardwaj ◽  
Jaspal Singh ◽  
Biswarup Satpati ◽  
Satyabrata Mohapatra
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Zno Nanoparticles ◽  
Chemical Method ◽  
Photocatalytic Properties ◽  
Oriented Attachment ◽  
Blue Dye ◽  
Zno Nanostructures ◽  
Wet Chemical Method ◽  
Wet Chemical

Flower-like ZnO nanostructures were synthesized by a facile wet chemical method. Structural, optical and photocatalytic properties of these nanostructures have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) and UV–vis absorption spectroscopy. SEM and TEM studies revealed flower-like structures consisting of nanosheets, formed due to oriented attachment of ZnO nanoparticles. Flower-like ZnO structures showed enhanced photocatalytic activity towards sun-light driven photodegradation of methylene blue dye (MB) as compared to ZnO nanoparticles. XRD, UV–vis absorption, PL, FTIR and TEM studies revealed the formation of Zn(OH)2 surface layer on ZnO nanostructures upon ageing. We demonstrate that the formation of a passivating Zn(OH)2 surface layer on the ZnO nanostructures upon ageing deteriorates their efficiency to photocatalytically degrade of MB.

Structural and Magnetic study of Al3+ doped Ni0.75Zn0.25Fe2-xAlxO4 nanoferrites

2013 ◽  
Vol 1506 ◽  
Author(s):  
L. Wang ◽  
B. K. Rai ◽  
S. R. Mishra
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Chemical Method ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Transmission Electron ◽  
Magnetic Dilution ◽  
Wet Chemical ◽  
Structural And Magnetic Properties

AbstractNanostructured Al3+ doped Ni0.75Zn0.25Fe2-xAlxO4 (x = 0.0,0.2,0.4,0.6,0.8, and 1.0) ferrites were synthesized via wet chemical method. X-ray diffraction, transmission electron microscopy, and magnetization measurements have been used to investigate the structural and magnetic properties of spinel ferrites calcined at 950 °C .With the doping of Al3+, the particle size of Ni0.75Zn0.25Fe2-xAlxO4 first increased to 47 nm at x = 0.4 and then decreased down to 37 nm at x = 1. Saturation magnetization decreased linearly with Al3+ due to magnetic dilution. The coercive field showed an inverse dependence on the particle size of ferrites.

Optical properties and energy transfer processes in Tb3+-doped ZnSe quantum dots

2021 ◽  
Author(s):  
Nguyen Ca ◽  
N. D Vinh ◽  
Phan Van Do ◽  
N. T. Hien ◽  
Xuan Hoa Vu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Quantum Dots ◽  
Chemical Method ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Transfer Processes ◽  
Transmission Electron ◽  
Wet Chemical

Tb3+-doped ZnSe quantum dots (QDs) with Tb content in the range of 0.5 - 7% were successfully synthesized by a wet chemical method. X-ray diffraction (XRD) and transmission electron microscopy...

Wet-Chemical Synthesis and Enhanced Photocatalytic Performance of ZnO/Ag Micro Hybrid Material

2011 ◽  
Vol 328-330 ◽  
pp. 1139-1142 ◽  
Author(s):  
Pei Yan Ma ◽  
Yan Wu ◽  
Zheng Yi Fu ◽  
Wei Min Wang
Keyword(s):  
Photocatalytic Activity ◽  
Hybrid Material ◽  
Chemical Method ◽  
Photocatalytic Performance ◽  
Face Centered Cubic ◽  
Wet Chemical Method ◽  
Wet Chemical Synthesis ◽  
New Type ◽  
Wet Chemical ◽  
Face Centered

A new type of ZnO/Ag micro hybrid material has been fabricated by a facile wet chemical method using citrate as a crystal growth modifier. The morphology and component of ZnO/Ag hybrid material were characterized by SEM and XRD. It is shown that the platelike crystals connect together by means of embedding. The sample is composed of wurtzite ZnO and face-centered cubic Ag. The results of XPS, UV-Vis and PL spectra verify the electron transfer from Ag to ZnO. The photocatalytic test with Rhodamine B (RhB) as a representative dye pollutant shows that the ZnO/Ag hybrid material exhibits an improved photocatalytic activity.

The Synthesis and Photocatalytic Properties of ZnO-SnO2 Nanorods Using Bamboo Charcoal as the Template

2014 ◽  
Vol 1014 ◽  
pp. 21-24
Author(s):  
Wei Liu ◽  
Jian Fa Ou ◽  
Qiu Ying Pan ◽  
Wu Yi Zhou
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Chemical Method ◽  
Degradation Rate ◽  
Organic Pollutant ◽  
Bamboo Charcoal ◽  
Wet Chemical Method ◽  
Transmission Electron ◽  
Zno Nanomaterials ◽  
Wet Chemical

The ZnO-SnO2 nanorods were prepared successfully by wet chemical method and bamboo charcoal as the template. The transmission electron microscope (TEM) results showed that the ZnO-SnO2 nanorods prepared at 700°C were uniform with the diameters of about 55 nm and the lengths of about 160 nm. The photocatalytic activity was studied while the methylene blue was used as the organic pollutant. The results indicate that the degradation rate of the methylene blue by the ZnO-SnO2 nanorods was about 89%, twice higher than that of the pure ZnO nanomaterials.

Preparation of TiO2/ZnS core/sheath heterostructure nanotubes via a wet chemical method and their photocatalytic activity

2007 ◽  
Vol 92 (2) ◽  
pp. 239-246 ◽  
Author(s):  
Hong Li ◽  
Baolin Zhu ◽  
Yunfeng Feng ◽  
Shurong Wang ◽  
Shoumin Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Wet Chemical
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