A nanopowder with dual detection effects on temperature and pH and its preparation method

Abstract

The invention provides a nanopowder with dual detection effects on temperature and pH, characterized in that: the nanopowder raw materials include powder, catalyst, aromatic polycarboxylic acid, hydroxycarboxylic acid, rare earth salt and water, rare earth salt One or more of the chloride salts or nitrates of Eu and Tb. And provide a kind of method for preparing this nanopowder, comprise the following steps: (1) prepare aromatic polycarboxylic acid modified powder: powder, catalyst, aromatic polycarboxylic acid are placed in deionized water, stir, dry, Obtain the powder modified by aromatic polycarboxylic acid; (2) mix aromatic polycarboxylic acid modified powder, rare earth salt, hydroxycarboxylic acid, take deionized water as medium, carry out hydrothermal reaction, after reaction, drop to room temperature, centrifuged, and dried. The temperature detection range of the nanometer powder is 50-300K, and the pH detection range is 2-6.

Description

technical field [0001] The invention belongs to the field of temperature and pH detection, in particular to a nanopowder with dual detection effects on temperature and pH. Background technique [0002] Temperature is a parameter that often needs to be measured in multidisciplinary fields and industrial production. However, the contact temperature detectors mainly used in the prior art, such as mercury and resistance thermometers, must be in contact with the substance to be measured and respond to the presence of the thermometer. Defects such as slow speed limit the use of traditional thermometers or detectors. In recent years, with the deepening of research, people began to conduct extensive research on temperature sensing materials, and proposed and prepared the use of fluorescence, infrared and other means to achieve temperature sensing to achieve the purpose of detecting temperature. Among them, fluorescence has the characteristics of fast response to temperature changes...

AI Technical Summary

Problems solved by technology

[0005] In many scientific fields, there is a wide demand for simultaneous measurement of temperature and pH. However, reports on temperature and pH fluorescent dual detection sensing materials in the prior art are very limited. The nano-powder for detection has a small particle size and a wide range of applications. At the same time, it has high detection accuracy and sensitivity and can quickly respond to temperature and pH changes.

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