Characteristic, electrical and optical properties of potassium borate (KB5O8·4H2O) hydrothermally synthesized from different boron sources

Abstract

Potassium borate was hydrothermally synthesized from various boron minerals (H 3 BO 3 , B 2 O 3 , Na 2 B 4 O 7 •5H 2 O and Na 2 B 4 O 7 •10H2 O) at reaction conditions of 60-90 °C and 15-120 min. The synthesized potassium borate was identified as "santite (KB 5 O 8 •4H 2 O)" from the X-ray diffraction (XRD) analyses results. The specific band values between B and O atoms were characterized by Fourier transform infrared and Raman spectroscopies. Multiangular particles were generally observed in the range of 3.41 μm-234.94 nm. The use of different boron sources affected the morphology. Higher reaction yields were determined in the use of boric acid (H 3 BO 3 ). Optical absorption of potassium borate minerals was approximately 340 nm. AC and DC electrical properties of materials were determined by using current-voltage and capacitance voltage characteristics. Electrical resistivity values of DC were found in the range of 4.17 × 10 8 -4.07 × 10 10 Ω cm, whereas dielectric constants of AC were between 2 × 10 5 and 2 × 10 6 .

The effect of zinc and sodium borate doping on the structural, morphological, optical, electrical and electrochemical properties of PEDOT:PSS thin film electrodes for flexible and transparent supercapacitor applications

“…Bands corresponding to the symmetric stretching of four coordinate boron to oxygen bands [ ν s (B (4) –O)] and the bending mode of boron–oxygen–hydrogen [ δ (B–O–H)] appear at 781 cm −1 and 1245 cm −1 in the FTIR spectrum of ZnB doped PEDOT:PSS thin films. 38 From the FTIR spectra, it is confirmed that dopants are substituted into the PEDOT:PSS lattice. 36…”