Selective recognition of hydrogen sulfide using template and catalyst free grown ZnO nanorods

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 54952-54962 ◽  
Author(s):  
Ganesh Kumar Mani ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Hydrogen Sulfide ◽  
Spray Pyrolysis ◽  
Room Temperature ◽  
Spray Pyrolysis Technique ◽  
Zno Nanorods ◽  
Single Step ◽  
Selective Recognition ◽  
Glass Substrates ◽  
Catalyst Free

A single step spray pyrolysis technique was used to grow ZnO nanorods on glass substrates without any template or catalyst and the nanorods were successfully employed to detect hydrogen sulfide at room temperature.

Preparation of Shape and Size-Controlled Zinc Oxide Nanostructures by Chemical Spray Pyrolysis Technique

2006 ◽  
Vol 957 ◽  
Author(s):  
Tatjana Dedova ◽  
Malle Krunks ◽  
Arvo Mere ◽  
Jelena Klauson ◽  
Olga Volobujeva
Keyword(s):  
Zinc Oxide ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Zno Nanorods ◽  
Solution Concentration ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Zinc Oxide Nanostructures ◽  
Glass Substrates ◽  
Zno Rods

ABSTRACTHighly structured layers comprising of vertically aligned zinc oxide rods, tripods or platelets were fabricated by spray pyrolysis method at temperatures of 510-550 °C. The zinc chloride solution was pulverized onto the preheated substrates of glass and ITO, SnO2, ZnO covered glass substrates with the help of compressed air as a carrier gas. ZnO layers were characterized by scanning electron microscopy and Raman spectroscopy. C-axis orientated ZnO nanorod arrays of well-developed hexagonal rods with length from some hundreds of nanometers up to some microns and with diameter from 70 nm up to 900 nm . The rise of both the growth temperature and solution concentration increases rod dimensions. Deposition of the solutions with the concentration of 0.05 up to 0.2 mol/l results in structured layers composed of rods on glass substrates. Using ITO, SnO2 and ZnO thin film covered glasses diluted solutions should be used to obtain ZnO nanorods. Alcoholic solutions allow deposit thinner rods and reduce the deposition temperature. Very strong and relatively narrow E2 Raman bands indicate that ZnO rods prepared by spray pyrolysis technique are of high crystal quality.

scholarly journals Structural and Optical Properties of Cobalt-Doped Zinc Oxide Thin Films Prepared By Spray Pyrolysis Technique

2010 ◽  
Vol 7 (1) ◽  
pp. 69-75
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Texture Coefficient ◽  
Hexagonal Structure ◽  
Structural And Optical Properties ◽  
Lattice Constants ◽  
Glass Substrates

Undoped and Co-doped zinc oxide (CZO) thin films have been prepared by spray pyrolysis technique using solution of zinc acetate and cobalt chloride. The effect of Co dopants on structural and optical properties has been investigated. The films were found to exhibit maximum transmittance (~90%) and low absorbance. The structural properties of the deposited films were examined by x-ray diffraction (XRD). These films, deposited on glass substrates at (400? C), have a polycrystalline texture with a wurtzite hexagonal structure, and the grain size was decreased with increasing Co concentration, and no change was observed in lattice constants while the optical band gap decreased from (3.18-3.02) eV for direct allowed transition. Other parameters such as Texture Coefficient (Tc), dislocation density (?) and number of crystals (M) were also calculated .

scholarly journals Synergistic Effect of Nanocrystalline SnO2 Sensitization by Bimetallic Au and Pd Modification via Ingle Step Flame Spray Pyrolysis Technique

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 46
Author(s):  
Valeriy Krivetskiy ◽  
Konstantin Zamanskiy ◽  
Alina Krotova
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensor ◽  
Spray Pyrolysis Technique ◽  
Single Step ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Level Control ◽  
Sensor Performance ◽  
Icp Ms ◽  
Composition Structure

Convenient and scalable single step flame spray pyrolysis (FSP) synthesis of bimetal AuPd sensitized nanocrystalline SnO2 for gas sensor application is reported. The materials chemical composition, structure and morphology has been studied by XRD, XPS, HAADFSTEM, BET, ICP-MS techniques as well as thermo-programmed reduction with hydrogen (TPR-H2). Superior gas sensor response of bimetal modified SnO2 towards wide concentration range of reducing (CO, CH4, C3H8, H2S, NH3) and oxidizing (NO2) gases compared to pure and monometallic modified SnO2 is reported. The observed enhanced gas sensor performance is concluded to arise from combination of facilitated oxygen molecule spillover on gold particles and electronic effect of Fermi level control by reoxidizing Pd-PdO clusters, homogeneously distributed over SnO2 particles surface.

INFLUENCE OF ANNEALING DURATION ON THE GROWTH OF V2O5 NANORODS SYNTHESIZED BY SPRAY PYROLYSIS TECHNIQUE

2016 ◽  
Vol 23 (06) ◽  
pp. 1650057
Author(s):  
N. M. ABD-ALGHAFOUR ◽  
NASER M. AHMED ◽  
Z. HASSAN ◽  
D. ABUBAKAR ◽  
M. BOUOUDINA
Keyword(s):  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Xrd Analysis ◽  
Annealing Duration ◽  
Chemical Spray Pyrolysis ◽  
Tem Analysis ◽  
Glass Substrates ◽  
Increase With Increase ◽  
Transmission Electron ◽  
Annealing Effects

This paper deals with the investigation of annealing effects on the structural, morphological and optical properties of V2O5 nanorods (NRs) grown on the glass substrates by using chemical spray pyrolysis technique. The as-prepared samples were annealed at [Formula: see text] for 40, 60 and 120 min in a quartz tube furnace. The high resolution X-ray diffraction (XRD) analysis revealed V2O5 NRs with preferred orientation along (001) plane. The crystallite size of the V2O5 NRs was increased by increasing the annealing duration. The morphological observations using field emission scanning electron microscope (FESEM) displayed NRs structures whose diameter and length were found to increase with increase of the annealing duration. The transmission electron microscopy (TEM) analysis confirmed the orthorhombic structures of the NRs. The AFM measurements indicated an increase of the average surface roughness by increasing the annealing time. The Raman spectroscopy revealed V–O–V phonon mode in the NRs annealed for 120 min. The optical bandgap was found in the range 2.6–2.58[Formula: see text]eV and observed to decrease with various duration annealed.

PROPERTIES OF LOW-LEVEL Sn-DOPED In2S3 FILMS DEPOSITED BY SPRAY PYROLYSIS TECHNIQUE

2019 ◽  
Vol 26 (01) ◽  
pp. 1850126 ◽  
Author(s):  
N. BOUGUILA ◽  
M. KRAINI ◽  
J. KOAIB ◽  
I. HALIDOU ◽  
C. VÁZQUEZ-VÁZQUEZ ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Atomic Ratio ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Sn Doping ◽  
Text Type ◽  
Glass Substrates ◽  
Starting Solution ◽  
Optical Gap Energy

Tin-doped indium sulfide films were grown on glass substrates by spray pyrolysis technique at low different Sn:In atomic ratio in the starting solution and optimum experiment conditions ([Formula: see text]C, S:[Formula: see text]). The tin to indium molar ratio Sn:In was varied from 0 to [Formula: see text] in the solution. The obtained films with 2[Formula: see text][Formula: see text]m of thickness, are perfectly adhered, homogenous and uniform on the substrates. X-ray diffraction study reveals that all the films are formed in [Formula: see text] phase grown preferentially along (400). These films lose the orientation with increasing tin doping level. The crystallite size of undoped film was 48.8[Formula: see text]nm, which increases to 59.2[Formula: see text]nm corresponding to the film grown with Sn:[Formula: see text]. Raman analysis shows different peaks related to In2S3 phase. Optical analysis shows that these films are transparent in the visible and near IR with a transmittance higher than 85%. The optical gap energy is found to be direct and varies from 2.61[Formula: see text]eV to 2.76[Formula: see text]eV with the increase of Sn:In ratio from 0 to [Formula: see text]. The films are [Formula: see text] type and Sn doping improves considerably their conductivity. The photoluminescence behavior of In2S3:Sn films was also studied.

PREPARATION OF CDTE FILMS BY SPRAY PYROLYSIS TECHNIQUE AND THEIR CHARACTERIZATIONS

2011 ◽  
Vol 25 (31) ◽  
pp. 4155-4158
Author(s):  
S. D. GUNJAL ◽  
Y. B. KHOLLAM ◽  
P. N. SHELKE ◽  
R. R. UDAWANT ◽  
M. G. TAKWALE ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Gas Flow ◽  
Spray Pyrolysis Technique ◽  
Band Gap Energy ◽  
The Novel ◽  
Zinc Blend ◽  
Glass Substrates ◽  
Sem Study ◽  
Gas Purging ◽  
Cdte Films

In present paper, we report the preparation of CdTe films on thoroughly cleaned glass substrates by using the novel spray pyrolysis technique with CdCl 2. H 2 O and TeO 2 as precursor materials. The films were deposited on glass substrates by using the parameters: (a) spray nozzle - substrate distance = 30 cm, (b) sparing solution conc. = 0.02 M, (c) carrier N 2 gas flow rate = 15 lpm, (d) substrate temperature = 350°C, (e) deposition time = 15 min. (f) N 2 gas purging time for deposition chamber = 45 min. and (g) amount of spray solution = 50 ml solution. The resultant films were characterized by using physical techniques: XRD, FTIR, EDAX and SEM. The characterization results showed that the resultant films are having material purity and cubic CdTe phase purity with zinc blend symmetry. The SEM study revealed the nano-rod morphological feature of CdTe films with rod diameter in range of 100 - 250 nm and average rod length ~ 5μm. The values of absorptance (α) and band gap energy ( E g ) for these films are found to be 0.91 and ~ 1.42 eV respectively. These results indicated the high potential of CdTe films prepared in the present work for solar cell applications.

Fe2O3 Thin Films Prepared by Ultrasonic Spray Pyrolysis

2010 ◽  
Vol 644 ◽  
pp. 105-108 ◽  
Author(s):  
M.A. García-Lobato ◽  
A. Hernández-V ◽  
H.M. Hdz-García ◽  
Arturo I. Martinez ◽  
M.I. Pech-Canul
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Ultrasonic Spray Pyrolysis ◽  
Morphological Properties ◽  
Amorphous Thin Films ◽  
Glass Substrates ◽  
Ultrasonic Spray Pyrolysis Technique ◽  
Ultrasonic Spray ◽  
Iron Oxide Films

Fe2O3 thin films were obtained on glass substrates by the ultrasonic spray pyrolysis technique; additionally, a thermodynamic analysis on the Fe2O3 formation from different precursor salts was performed. In this work, the influence of the deposition temperature is related with the structural, optical, and morphological properties of the iron oxide films. The present results reveal that amorphous thin films are obtained at temperatures lower than 350° C, while polycrystalline films with the maghemite structure are formed at higher temperatures.

Growth of tin oxide thin films composed of nanoparticles on hydrophilic and hydrophobic glass substrates by spray pyrolysis technique

2015 ◽  
Vol 357 ◽  
pp. 915-921 ◽  
Author(s):  
Abdul Rasheed Paloly ◽  
M. Satheesh ◽  
M. Carmen Martínez-Tomás ◽  
Vicente Muñoz-Sanjosé ◽  
Sreekumar Rajappan Achary ◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Tin Oxide ◽  
Spray Pyrolysis Technique ◽  
Oxide Thin Films ◽  
Glass Substrates

The Fabrication of Titanium Dioxide (TiO2) Thin Film via Deposited Spray Pyrolysis Using for Antibacterial Applications

2015 ◽  
Vol 804 ◽  
pp. 183-186
Author(s):  
Prapon Lertloypanyachai ◽  
Eakgapon Kaewnuam ◽  
Krittiya Sreebunpeng
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Titanium Dioxide ◽  
Spray Pyrolysis ◽  
Uv Light ◽  
Spray Pyrolysis Technique ◽  
Low Cost ◽  
Large Area ◽  
Bacteria Growth ◽  
Glass Substrates

Titanium dioxide (TiO2) is coated onto the materials (e.g.glass ceramic) to inhibit the bacteria growth. TiO2has become a popular photocatalyst for both air and water purification. It has also shown to be very active for bacterial destruction even under UV light. The photocatalytic of TiO2involves the light-induced catalysis of reducing and oxidizing reactions on the surface of materials. The spray pyrolysis technique for material synthesis in thin-film configuration is an interesting option due to the use of inexpensive precursor materials and low-cost equipment suitable for large-area coatings. In this research, TiO2thin films were deposited onto glass substrates using spray pyrolysis technique. Escherichia coli (E.coli) was used as testing bacteria. TiO2thin films showed some antibacterial effect in the halo test.

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