Preparation of hexagonal BN whiskers synthesized at low temperature and their application in fabricating an electrochemical nitrite sensor

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 27767-27774 ◽  
Author(s):  
Wenpo Luo ◽  
Tao Yang ◽  
Lei Su ◽  
Kuo-Chih Chou ◽  
Xinmei Hou
Keyword(s):  
Low Temperature ◽  
Boron Nitride ◽  
Boric Acid ◽  
Hexagonal Boron Nitride ◽  
Raw Materials ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Nitrite Sensor

Hexagonal boron nitride (h-BN) whiskers were synthesized via the polymeric precursor method using boric acid (H3BO3) and melamine (C3H6N6) as raw materials at 1073–1273 K in flowing nitrogen/hydrogen (5% hydrogen).

scholarly journals Influence of heat treatment on LiNbO3 thin films prepared on Si(111) by the polymeric precursor method

1999 ◽  
Vol 14 (7) ◽  
pp. 3115-3121 ◽  
Author(s):  
V. Bouquet ◽  
E. Longo ◽  
E. R. Leite ◽  
J. A. Varela
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
High Temperature ◽  
Low Temperature ◽  
Thermal Analyses ◽  
Dip Coating ◽  
Treatment Temperature ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method

The effects of heat-treatment temperature on LiNbO3 thin films prepared by the polymeric precursor method were investigated. The precursor solution was deposited on Si(111) substrates by dip coating. X-ray diffraction and thermal analyses revealed that the crystallization process occurred at a low temperature (420 °C) and led to films with no preferential orientation. High-temperature treatments promoted formation of the LiNb3O8 phase. Scanning electron microscopy, coupled with energy dispersive spectroscopy analyses, showed that the treatment temperature also affected the film microstructure. The surface texture—homogeneous, smooth, and pore-free at low temperature—turned into an “islandlike” microstructure for high-temperature treatments.

Synthesis of Nano CuO by Polymeric Precursor Method and its Low Temperature Reduction to Stable Copper Nanoparticles

2011 ◽  
Vol 15 ◽  
pp. 11-20 ◽  
Author(s):  
V. Andal ◽  
G. Buvaneswari
Keyword(s):  
Low Temperature ◽  
Metallic Copper ◽  
Glass Plate ◽  
Copper Nitrate ◽  
Reducing Agent ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Dispersion Method ◽  
Plate Method ◽  
Precursor Method

CuO nanoparticles showing different morphologies were prepared by polymeric precursor method using three different copper sources: basic copper carbonate, copper nitrate and copper hydroxide. The decomposition temperature of the precursors varies from 200 C to 400 C. The effect of the concentration of the polymeric additive was studied. The CuO nanopowder was reduced to metallic copper at low temperature using hydrazine hydrate as a reducing agent. The oxide was treated with the reducing agent in two forms: (1) as dispersion in 0.1% PVA (dispersion method) (2) as slurry with 0.1% PVA applied on a glass plate (plate method). The maroon copper metal nanofluid achieved in dispersion method was stable for six months and the copper nanopowder obtained from the plate method showed stability for more than six months. The precursor, CuO and Cu nanomaterials were characterized by powder XRD, FT-IR, TGA, SEM and TEM techniques.

Low-temperature growth of c-axis-oriented Y-type hexagonal ferrite thin films by the polymeric precursor method

2001 ◽  
Vol 16 (9) ◽  
pp. 2471-2474 ◽  
Author(s):  
Tatsuo Fujii ◽  
Aiko Harano ◽  
Makoto Nakanishi ◽  
Jun Takada
Keyword(s):  
Low Temperature ◽  
Precursor Solution ◽  
Dip Coating ◽  
Treatment Temperature ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Temperature Growth ◽  
Grain Structures ◽  
Heat Treated

Well-crystallized Ba2Zn2Fe12O22 (Zn2–Y) films with high c-axis oritentation were successfully formed on Ag substrates at low temperature by the polymeric precursor method. A precursor solution with stoichiometric Ba2+, Zn2+, and Fe3+ ions was deposited on the substrates by a dip-coating. The films were then heat-treated at temperatures ranging from 700 to 900 °C. The crystallization process of c-axis-oriented Zn2–Y films occurred at the considerably low temperature of 750 °C, though a small amount of spinel oxides contaminated them. The films had hexagonal grain structures which were developed by increasing the heat-treatment temperature. Magnetization curves of the Zn2–Y film heated at 900 °C clearly indicated that the film had large in-plane magnetic anisotropy and had small in-plane coercivity.

Synthesis of Bi4Ge3O12 ceramic scintillators by the polymeric precursor method

2009 ◽  
Vol 100 (2) ◽  
pp. 537-541 ◽  
Author(s):  
Fabiane Alexsandra Andrade de Jesus ◽  
Ronaldo Santos da Silva ◽  
Zélia Soares Macedo
Keyword(s):  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method

Yellow ZnxNi1−xWO4 pigments obtained using a polymeric precursor method

2008 ◽  
Vol 77 (1) ◽  
pp. 210-216 ◽  
Author(s):  
A DEOLIVEIRA ◽  
J FERREIRA ◽  
M SILVA ◽  
G BRAGA ◽  
L SOLEDADE ◽  
...  
Keyword(s):  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method

Preparation of barium strontium titanate using a modified polymeric precursor method

2007 ◽  
Vol 42 (4) ◽  
pp. 1149-1155 ◽  
Author(s):  
K. Venkata Saravanan ◽  
K. C. James Raju ◽  
M. Ghanashyam Krishna ◽  
Anil K. Bhatnagar
Keyword(s):  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Barium Strontium
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