The highly sensitive NO2 gas sensor using ZnO nanorods grown by the sol-gel method

Nanometric zinc oxide was prepared by sol-gel method using two different capping agents e.g., ethylene diamine (EDA) and citric acid (CAM) in different solvents. Nanorods of ZnO was prepared by sol-gel method using zinc nitrate hexahydrate (1M). The as-synthesized samples were characterized using XRD, FESEM-EDAX, TG/DTA techniques. FESEM micrographs suggest that the formation of nanorods of ZnO takes place for EDA and CAM in MeOH after calcination at 150 °C and 170 °C, respectively for 12h. The antibacterial activity tests (also known as plus-minus tests) were done by allowing bacteria to grow normally in laboratory conditions, and also by subjecting to ZnO nanoparticles in the powder form. On comparison of the above two Petri plates, the presence of a zone of inhibition indicates the antibacterial nature, which would have not existed if the bacteria did not experience any adverse effects by the presence of the ZnO nanorods. In the present study, the activity tested against Escherichia coli ATCC 25922 (gram-negative) Micrococcus leuteus and Bacillus subtilis (gram-positive) the results suggest the selective activity of the nanoparticles against these species.

Download Full-text

Structural and Morphological Analysis of Nanocomposite SnO2-Graphene Synthesized by Sol-Gel Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.887.32 ◽

2017 ◽

Vol 887 ◽

pp. 32-40 ◽

Cited By ~ 1

Author(s):

Aminuddin Debataraja ◽

Brian Yuliarto ◽

Nugraha ◽

Bambang Sunendar ◽

Hiskia

Keyword(s):

Crystal Structure ◽

Gas Sensor ◽

Morphological Analysis ◽

Sol Gel ◽

Hexagonal Structure ◽

Gel Method ◽

Sol Gel Method ◽

Sensor Performance ◽

Sensing Material ◽

Potential Applicability

Gas sensor performance is strongly influenced by the crystal structure, composition and morphology of the material used. In this paper, structural and morphological analysis of nanocomposite SnO2-Graphene synthesized by Sol-Gel method with the composition of 1:1, 1:2, 1:3 will be described. Analysis of the morphology and structure of nanocomposite SnO2-Graphene is investigated using XRD, SEM and TEM with the purpose of obtaining the crystal structure, morphology, composition and size of the resulting particles. The XRD results showed that the formation of the crystalline phase can be recorded at 2θ = 26.64; 34.2; 51.92, where the results of SEM show that the nanomaterial SnO2 has tetragonal structure while the graphene has hexagonal structure. The nanocomposite SnO2-Graphene has nanorod pattern. Furthermore, the surface analysis using TEM of nanocomposite SnO2-Graphene shows that the surface has the rod diameter in the range of 5-8 nm. The unique nanopattern of SnO2-Graphene will have potential applicability as the sensing material for CO gas sensor.

Download Full-text

Systematic study of inorganic functionalization of ZnO nanorods by Sol-Gel method

Journal of Physics Conference Series ◽

10.1088/1742-6596/786/1/012022 ◽

2017 ◽

Vol 786 ◽

pp. 012022 ◽

Cited By ~ 1

Author(s):

J K Gamarra ◽

C Solano ◽

I Piñeres ◽

H Gómez ◽

J Mass ◽

...

Keyword(s):

Systematic Study ◽

Sol Gel ◽

Zno Nanorods ◽

Gel Method ◽

Sol Gel Method

Download Full-text

ZnO nanorods covered with a TiO2 layer: simple sol–gel preparation, and optical, photocatalytic and photoelectrochemical properties

Journal of Materials Chemistry A ◽

10.1039/c5ta01087j ◽

2015 ◽

Vol 3 (24) ◽

pp. 12748-12760 ◽

Cited By ~ 49

Author(s):

Maciej Kwiatkowski ◽

Igor Bezverkhyy ◽

Magdalena Skompska

Keyword(s):

Sol Gel ◽

Zno Nanorods ◽

Core Shell ◽

Photoelectrochemical Properties ◽

Tio2 Layer ◽

Gel Method ◽

Sol Gel Method ◽

Ito Electrode ◽

Gel Preparation

In this work, composite core–shell ZnO/TiO2 materials were fabricated by deposition of TiO2 layers via sol–gel method on ZnO nanorods hydrothermally grown on ITO electrode.

Download Full-text