Self-supporting MgTiO3 nanofiber chemical warfare agent degradable material and preparation method thereof

Abstract

The invention discloses a self-supporting MgTiO3 nanofiber chemical warfare agent degradable material and a preparation method thereof. The preparation method comprises the following steps of firstly, preparing a precursor solution composed of magnesium salt, a titanate coupling agent, a grain inhibitor and a solvent; then carrying out electrostatic spinning to obtain a precursor fiber membrane; and finally, calcining the precursor fiber membrane in an inert atmosphere, and then carrying out low-temperature thermal oxidation treatment in an air atmosphere to obtain the self-supporting MgTiO3 nanofiber membrane. The precursor solution with certain viscoelasticity and spinnability is prepared under the condition that a macromolecular spinning aid is not added into the precursor solution, and the MgTiO3 nanofiber membrane obtained after calcination has relatively good flexibility and an excellent chemical warfare agent catalytic degradation effect.

Description

technical field [0001] The invention belongs to the technical field of new materials and relates to a self-supporting MgTiO 3 Nanofiber chemical warfare agent degradation material and preparation method thereof. Background technique [0002] Chemical warfare agents are highly toxic and used for war purposes. They have the characteristics of strong toxicity, fast action, long-lasting poisonous effect, and wide killing range. They have a stable structure and are not easy to degrade, which has caused great impact on human beings and the ecological environment. Therefore, it is urgent to develop new and efficient chemical warfare agent degradation materials. At present, the catalysts used for the degradation of chemical warfare agents mainly include polyoxometalates, metal-organic framework materials, metal oxides, etc. Among them, metal oxides are widely used due to their high catalytic activity, wide range of raw material sources, and simple preparation processes. Applied to...

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Problems solved by technology

[0003] Inorganic Chemistry Communications 7 (2004) 431-433 reported that magnesium ethoxide and titanium isopropoxide were used as metal sources, polyvinyl acetate was used as a polymer spinning aid, and MgTiO was prepared by electrospinning technology and high-temperature calcination. 3 Nanofibers; Journal of Nanoscience and Nanotechnology 6 (2006) 510–513 reported the use of the same method to prepare MgTiO 3 Nanofibers; International Journal of Hydrogen Energy42(2017) 25882-25890 reported that magnesium acetate tetrahydrate and tetrabutyl titanate were used as metal sources, polyvinylpyrrolidone was used as a polymer template, and MgTiO was obtained by electrospinning technology. 3 nanofibers; although the above literature obtained MgTiO by electrospinning technology 3 However, due to the addition of a large number of polymers in the precursor solution, the content of inorganic components in the precursor solution is low, resulting in the MgTiO 3 The fiber yield is low, and the obtained MgTiO 3 Fibers are mainly composed of particles

In addition, the high molecular polymer in the precursor fiber is easy to destabilize and decompose during the calcination process, resulting in poor fiber continuity and more single fiber defects, making it difficult to obtain self-supporting MgTiO 3 Nanofibers

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