Rod-like titanium protoxide powder and preparation method thereof

Abstract

The invention relates to a rod-like titanium protoxide powder and a preparation method thereof, wherein the titanium protoxide powder is Ti3O5 powder, Ti4O7 powder, Ti5O9 powder, Ti6O11 powder, Ti7O13 powder, Ti8O15 powder or Ti9O17 powder. The preparation method comprises: (1) material preparing, wherein raw materials comprise titanium dioxide powder, a carbon reducing agent and a chlorine salt, and according to the chemical formulas of each titanium protoxide powder and the chemical reactions among the used raw materials, the mold ratios of the raw materials for preparing various titanium protoxide powders are calculated; (2) material mixing and drying; (3) sintering, wherein the mixed powder obtained in the step (2) is loaded into a heating furnace, heating is performed at a heating speed of 5-15 DEG C / min under a flowing inert gas to achieve a temperature of 700-1300 DEG C, a reduction reaction is performed for 2-8 h at the temperature of 700-1300 DEG C, and cooling is performed along with the furnace to a room temperature after the reduction time is achieved; and (4) washing and drying, wherein the titanium protoxide-salt mixed powder obtained in the step (3) is washed with deionized water 3-10 times, and then drying is performed to obtain the rod-like titanium protoxide powder.

Description

technical field [0001] The invention belongs to the field of titanium oxide materials, in particular to a rod-shaped titanium oxide powder and a preparation method thereof. Background technique [0002] Magnéli phase titanium suboxide with rutile TiO 2 The structure of the lattice, its several different titanium oxide compounds have high electrical conductivity, and at the same time, the chemical stability is extremely high, and they have good light absorption ability in the visible light region or ultraviolet light region, which makes it a On the one hand, it can be an excellent electrode material and electrochemical catalyst carrier material for electrochemical applications, and on the other hand, it is also a very promising material for improving light absorption performance and photoelectrochemical performance. Ti 6 o 11 It is due to the polarization of the insulator generated by the electron-lattice coupling, which has antiferromagnetism. TiO has the highest conduct...

AI Technical Summary

Problems solved by technology

Ti 4 o 7 and Ti 5 o 9 Due to its high electrical conductivity and high chemical stability, it has become an electrode material that can replace carbon, which solves the problem that the fuel cell uses Pt / C and PtM / C catalysts, and the corrosion of the carrier C causes the battery to run for a long time. Pt particle migration grows or falls off, resulting in reduced battery stability and life

[0003] At present, titanium dioxide powder is mainly prepared by titanium dioxide reduction method, which is to use hydrogen, carbon black, metal titanium and carbon monoxide and other reducing agents to heat to a certain temperature in a vacuum or an inert gas atmosphere and keep it for a certain period of time to reduce titanium dioxide to prepare the required powder samples. , due to the high temperature of solid-solid reaction or gas-solid reaction, the generated titanium dioxide powder is seriously agglomerated, and the powder morphology is mainly spherical or worm-like, which limits its application in the fields of photocatalysis and electrochemistry.

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