Method for preparing octahedral crystal form Ta2O5 nanoparticles through self-reaction of single reagent

Abstract

The invention discloses a method for preparing octahedral crystal form Ta2O5 nanoparticles through self-reaction of a single reagent. The method comprises the following steps that 1, potassium fluotantalate powder is selected and dissolved in water, and the potassium fluotantalate solution is placed in a pretreated precious metal pipe and sealed; 2, the sealed precious metal pipe is placed in a hydrothermal reaction kettle and sealed, the temperature inside the hydrothermal reaction kettle is adjusted to be 200-500 DEG C, inert gas or deionized water is adopted for adjusting the pressure inside the hydrothermal reaction kettle to be 50-200 MPa, a hydrolysis reaction is carried out for 12-24 h, and the reaction kettle is cooled to indoor temperature after the reaction is finished; 3, the hydrothermal reaction kettle is opened, the reacted precious metal pipe is taken out and opened, solution residue is recycled, samples are collected, washed and dried, and therefore the octahedral crystal form Ta2O5 nanoparticles are obtained. In the method, the single reagent is adopted as a synthesis raw material, the cost is low, energy consumption is low, pollution is avoided, and the prepared Ta2O5 nanoparticles are intact in crystal form and are in an octahedral shape.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a single reagent self-reaction preparation of octahedral crystal form Ta 2 o 5 nanoparticle approach. Background technique [0002] Ta 2 o 5 As a typical wide bandgap semiconductor (bandgap 3.9eV), it has many outstanding features, such as good chemical stability, thermal stability, high dielectric coefficient, high melting point, high mechanical strength, high biocompatibility And it is easy to be compatible with semiconductor integrated circuits / processes, so it has a wide range of application prospects in the fields of chemical reaction vessels, medical equipment, capacitors, integrated circuits, pigment degradation, sewage treatment, and photocatalysis. [0003] Currently about Ta 2 o 5 There are many reports on membranes and various preparation methods; for Ta 2 o 5 The preparation of particles has also attracted people's attention, such as Chen Ying et al. in ...

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Problems solved by technology

For example, in 2010, Huang H. and others successfully prepared 20-25nm Ta 2 o 5 However, the whole preparation process is very complicated and the preparation process is long; Anandan S. et al successfully prepared 20-30nm Ta nanoparticles by hydrothermal method in 2012. 2 o 5 particles, in which diethanolamine was used as a stabilizer; in 2013, Li J et al first used a simpler method to prepare Ta 2 o 5 Nanoparticles, they mixed tantalum ethoxide and alcohol evenly and then ignited the alcohol. After the alcohol was completely burned, the white particles obtained were calcined at 800°C to prepare Ta with a particle size distribution of 500-1000nm. 2 o 5 particles

The above prepared Ta 2 o 5 The method of nanoparticle may be complex in procedure, high in cost, high in energy consumption, polluting to the environment, and the prepared Ta 2 o 5 The crystal form of nanoparticles also needs to be improved, which restricts the Ta 2 o 5 Application and Development of Nanomaterials in Industrial Production

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