Photoluminescence property of powders prepared by solid state reaction and polymeric precursor method

Abstract The polymeric precursor method was used for the synthesis of KNb3O8 and compared to the solid-state method. The materials were characterized by X-ray diffraction (XRD), infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, and determination of surface area and total pore volume by nitrogen isotherms at 77 K. The material prepared by the polymeric precursor method was single-phase while K2Nb4O11 was obtained as secondary phase when the solid-state method was used, as evidenced by the XRD patterns and the Raman spectra. The morphology of the materials was significantly altered by the synthesis method, as the KNb3O8 prepared by the polymeric precursor method presented a more porous morphology leading to a higher surface area and pore volume.

Download Full-text

RuO2–IrO2 solid state micro-liquid film pH sensor based on polymeric precursor method

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209420 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 1047-1055

Author(s):

Hongli Ji ◽

Junjun Jia ◽

Chao Zhang ◽

Chongcong Tao ◽

Lu Yang ◽

...

Keyword(s):

Solid State ◽

Ph Value ◽

Ph Sensor ◽

Polymeric Precursor Method ◽

Polymeric Precursor ◽

Precursor Method ◽

Wide Ph Range ◽

Glass Type ◽

Ph Range ◽

High Level

The glass-type electrodes based pH sensors suffer from the weakness of fragility and poor stability in acid/alkali solution. To overcome these disadvantages, a novel solid-state pH sensor based on a RuO2–IrO2 H+ sensitive electrode via a polymeric precursor method was developed in this paper. The electrochemical performance of pH sensor was tested in different conditions. The experimental results showed that the sensitivity of the pH sensor could reach a high level of 52.0 mV/pH in a wide pH range of 2 ∼ 10. Furthermore, the response of pH sensor was fast and the response time remained less than 2.2 s even under varying pH conditions. The experiment was repeated three times during a period of time, the potential difference of pH sensor was between ±0.3 mV and ±0.9 mV in different pH value solutions, demonstrating its good stability, repeatability, recyclability and small potential drift. The negligible interference of Li+, Na+, K+, Ca2+, Mg2+, to the proposed pH sensor was also proven experimentally.

Download Full-text

Influence of the solution pH on the morphological, structural and electrical properties of Bi3.50La0.50Ti3O12 thin films obtained by the polymeric precursor method

Materials Letters ◽

10.1016/j.matlet.2005.03.051 ◽

2005 ◽

Vol 59 (22) ◽

pp. 2759-2764 ◽

Cited By ~ 5

Author(s):

A.Z. Simões ◽

A. Ries ◽

F. Moura ◽

C.S. Riccardi ◽

E. Longo ◽

...

Keyword(s):

Thin Films ◽

Electrical Properties ◽

Polymeric Precursor Method ◽

Polymeric Precursor ◽

Solution Ph ◽

Precursor Method ◽

Structural And Electrical Properties

Download Full-text

Luminescent Properties of LiTaO3:Tm3+, Yb3+ Phosphors Prepared by Ball Milling Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.426 ◽

2013 ◽

Vol 423-426 ◽

pp. 426-429

Author(s):

Xin Ze Wang ◽

Zhong Xin Liu ◽

Hong Jian Gao ◽

Yani Jing ◽

Chang Lin Li ◽

...

Keyword(s):

Solid State ◽

Ball Milling ◽

Solid State Reaction ◽

Blue Emission ◽

Photoluminescence Property ◽

Luminescent Properties ◽

High Energy ◽

High Energy Ball Milling ◽

Conventional Solid State Reaction ◽

Energy Ball

LiTaO3: Tm3+, Yb3+powders were synthesized by a high-energy ball-milling (HEB) method compared with the conventional solid-state reaction (SSR) method. Under the excitation of 980 nm laser, the strong blue emission (477 nm) band is observed and attributed to1G4-3H6of Tm3+. Because of it causing high local temperature and narrow particles size, increasing the contact area between the particles and improved crystallinity of the host, synthesis by high-energy ball milling show higher photoluminescence (PL) intensity compared to the solid state reaction method. In the process of mechanical milling, Tm3+, Yb3+co-doped LiTaO3phosphors with high photoluminescence property could be achieved at a relatively low reaction temperature.

Download Full-text