Catalytic light-emitting sensitive material used for monitoring benzene and trimethylamine

Abstract

The invention relates to a catalytic light-emitting sensitive material used for monitoring benzene and trimethylamine. The catalytic light-emitting sensitive material is nano powder material which consists of Ag atom doped Y2O3, Fe2O3 and ZrO2; the mass percent ranges of the components are as follows: Ag accounts for 5-15%; Y2O3 accounts for 15-25%; Fe2O3 accounts for 40-50%; ZrO2 accounts for 20-30%. A preparation method of the catalytic light-emitting sensitive material comprises the following steps: co-dissolving yttrium salt, ferric salt and zircon salt in a citric acid aqueous solution, adjusting pH value by using ammonia water in a stirring state, standing and aging, then drying and fully grinding, roasting in a chamber electric furnace, and obtaining Y2O3, Fe2O3 and ZrO2 powder material; dissolving an appropriate amount of silver nitrate and maltose in water, adding the powder material which is dispersed by ultrasonic wave into the water by continuously stirring, drying, heating and reducing, cooling, grinding and obtaining Ag atom doped Y2O3, Fe2O3 and ZrO2 nano powder. A benzene-trimethylamine catalytic light-emitting sensor, which is manufactured by using the catalytic light-emitting sensitive material, is wide in linear range, good in selectivity and high in sensitivity, and is capable of monitoring benzene and trimethylamine in the air on line without influence of coexistence substance.

Description

technical field [0001] The present invention relates to a kind of catalytic luminescence sensitive material for monitoring benzene and trimethylamine, especially by A g atomically doped Y 2 o 3 , F e2 o 3 and ZrO 2 The nano-sensitive material composed of the invention belongs to the field of sensing technology. Background technique [0002] Benzene has been identified as a carcinogen by the World Health Organization. Benzene in the air mainly comes from architectural coatings, decorative paints, adhesive solutions and automobile exhaust. Benzene is one of the main pollutants in indoor air and poses a great threat to human health. Chronic benzene poisoning is mainly irritating to the skin, eyes and upper respiratory tract; frequent exposure to benzene can cause skin dryness and desquamation due to degreasing, and some allergic eczema occurs; long-term inhalation of benzene can lead to aplastic anemia. Trimethylamine is a gaseous pollutant. It is a colorless gas with f...

AI Technical Summary

Problems solved by technology

[0003] The determination methods of benzene and trimethylamine mainly include gas chromatography, high performance liquid chromatography, spectrophotometry, infrared spectroscopy, flow injection analysis, gas-liquid chromatography-mass spectrometry and ion chromatography, etc., because these methods need pre-enrichment Only when collected and properly processed can the determination be completed by large analytical instruments, so it takes a long time and is not easy to implement on site

In 2006, the inventor published a paper titled "Determination of Benzene Series in Air by Nanocomposite Catalytic Luminescence Method" on "Analytical Laboratory" using nano-scale copper manganese iron (atomic ratio 4:3:1) composite Oxide as a sensitive material can be detected online 1 ~ 80mg / m 3 Benzene series, the detection limit can reach 0.5mg / m 3 , but formaldehyde, methanol, ethanol and acetone interfere with the determination of benzene series, indicating that the selectivity of sensitive materials needs to be improved