Yttria/titanium dioxide nano composite material and preparation process thereof

A nanocomposite material, titanium dioxide technology, applied in the field of yttrium oxide/titanium dioxide nanocomposite materials and its preparation, can solve the problems of narrow photoresponse range of semiconductors, high recombination probability of photogenerated electrons/hole pairs, and easy deactivation of conduction band electrons , to achieve the effect of expanding the photoresponse range, improving the charge separation effect, and requiring less equipment

Active Publication Date: 2007-09-26
BAOSHAN IRON & STEEL CO LTD +1
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Problems solved by technology

But TiO 2 The photoresponse range of semiconductors is narrow, the recombination probability of semiconductor photogenerated electron / hole pairs is high, and the excited state valence band holes and conduction band electrons are easily deactivated.

Method used

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  • Yttria/titanium dioxide nano composite material and preparation process thereof
  • Yttria/titanium dioxide nano composite material and preparation process thereof
  • Yttria/titanium dioxide nano composite material and preparation process thereof

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Embodiment Construction

[0023] Referring to Fig. 1, it shows a schematic diagram of the process flow for preparing yttrium oxide / titania nanocomposite material. Take 10ml of butyl titanate (analytical pure) and 10ml of absolute ethanol and mix them with ultrasonic waves for 10min. The mixed solution was stirred with a heat-collecting constant temperature magnetic stirrer, and 3.617gY (NO 3 ) 3 ·6H 2 O, and the solution was added dropwise to the alcohol solution of butyl titanate, and the initial pH value of the reaction was controlled to be 9.5 with ammonia water. After stirring for two hours, the resulting sol was aged at room temperature for 24 h. Then the aged xerogel was filtered and washed twice with deionized water and absolute ethanol in a circulating water vacuum pump, and dried at 100°C in an electric heating constant temperature blast drying oven to obtain Y 2 o 3 / TiO 2 Nanocomposite precursors. Calcined at 600°C, 700°C, and 800°C for 4 hours in a box-shaped resistance furnace to obt...

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Abstract

The invention relates to a yttrium oxide/ titanium dioxide nanometer composite material. The component quality percentage is 0.1-75 of Y2Ti2O7, 10-45 of anatase TiO2 and 10-70 of rutile TiO2. The preparation method for nanometer powder is that sol-gel method is used to combine with the simple roasting and so it is provided with relative simple technology, easy operation, low demand for equipment and low cost. Compared with pure TiO2, the yttrium oxide/titanium dioxide nanometer composite material prepared in invention has higher catalytic capability. Actually the anatase titanium oxide composite Y203 is the decoration to TiO2 grain so that the charge separation effect of system can be improved and the TiO2 spectral response range is enlarged. The size of grain of obtained product is equal and the spectral response range is enlarged. It can be applied widely in water pollution treatment, waste gas treatment and bacteria disinfection so on.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to yttrium oxide / titania nanocomposite materials and a preparation method thereof. Background technique [0002] Nanocomposite materials have attracted extensive attention because they can enhance the characteristics of a single substance or have incomparable advantages of a single substance. Titanium dioxide is a semiconductor nano-catalyst with good band gap (band gap 3.2eV), strong oxidation ability, high catalytic activity, non-toxic, good biological, chemical and photochemical stability, etc. It can be used for waste gas purification, sewage Treatment, air purification, sterilization, energy materials and other fields. But TiO 2 The photoresponse range of semiconductors is narrow, the recombination probability of semiconductor photogenerated electron / hole pairs is high, and the excited valence band holes and conduction band electrons are easily deactivated. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J21/06B01J37/00
Inventor 李咸伟杨华明张科史蓉蓉俞勇梅董晓丹
Owner BAOSHAN IRON & STEEL CO LTD
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