1,720,984 research outputs found
OPTOCHEMICAL HCL-GAS DETECTION BASED ON ZINC TETRABROMOTETRAPHENYLPORPHYRIN DISPERSED IN ETHYL CELLULOSE
No full textFour zinc tetrabromotetraphenylporphyrin dispersed in a polymer matrix, the absorbance at 479 nm and 722 nm is sensitive to sub-ppm levels of HCl gas and also good reversibility is observed at room temperature
Two case studies of thick film sensing devices:some critical steps in the processing of screen-printed sensors
No full textDeterioration phenomena of electrochemical CO2 sensor with Pt, Na2CO3/ Na2O-Al2O3-4SiO2//YSZ/Pt structure
No full textOptochemical HCl gas detection based on tetraphenylporphine dispersed in ethylcellulose
No full textTo detect sub-ppm levels of HCl gas, spectral changes of tetraphenylporphine and derivatives dispersed in ethylcellulose were examined in the visible region. For free-base tetraphenylporphyrin the absorbance of the Soret and Q-bands are sensitive to sub-ppm levels of HCl and reversibility at room temperature. The Soret and Q-bands are also sensitive to vapours from aqueous solutions of HNO3, HF or HCOOH, while they are insensitive to vapours from CH3COOH or C2H5COOH and also to 1 ppm of NH3, Cl2, NO2 and NO. The sensitivity can be modified by substituent groups and using different concentrations of porphyrin in the composite
Electrical properties of sol-gel processed Nasicon having new compositions
No full textCERAMIC TRANSACTIONS: SOL-GEL SYNTHESIS AND PROCESSIN
Sol-gel synthesis, sintering and electrical properties of Nasicon having new compositions
No full textOPTOCHEMICAL HCL GAS-DETECTION BASED ON TETRAPHENYLPORPHINE DISPERSED IN ETHYL CELLULOSE
No full textTo detect sub-ppm levels of dry HCl gas, spectral changes of tetraphenylporphine dispersed in ethylcellulose were examined in the visible region. The Soret and Q-bands of free base tetraphenylporphine are sensitive to sub-ppm levels of HCl with a good reversibility and insensitive to NH3, Cl-2, NO2 and NO at room temperature
Synthesis and structural characterization of trimetallic perovskite-type rare-earth orthoferrites, LaxSm1-xFeO3
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