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A kind of conical titanium dioxide nanorod and preparation method thereof

A technology of titanium dioxide and nanorods, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as inability to guarantee photocatalytic efficiency, and achieve the effect of uniform size and uniform dispersion

Active Publication Date: 2017-12-05
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although, some studies have shown that high-energy {001} or {100}{010} facet anatase TiO 2 High photocatalytic efficiency cannot be guaranteed due to the lack of spontaneously separated charge carriers

Method used

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  • A kind of conical titanium dioxide nanorod and preparation method thereof
  • A kind of conical titanium dioxide nanorod and preparation method thereof
  • A kind of conical titanium dioxide nanorod and preparation method thereof

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preparation example Construction

[0042] For overcoming the deficiencies in the prior art, the invention provides a kind of preparation method of conical titania nanorod, comprising the following steps:

[0043] (1) Add CTAB and DDAB respectively to the water, then add ammonia water with a volume fraction of 1.7% to the solution, stir at a constant temperature and at a constant speed to prepare a mixed solution a;

[0044] Wherein, the temperature during the stirring process is 32-37°C; preferably: the stirring temperature is 35°C.

[0045] Stir for 2-3h after adding ammonia water, preferably: stir for 2h.

[0046] (2) TTIP is added to the mixed solution a prepared by the above step (1), stirred at a constant temperature and at a constant speed to obtain a suspension b;

[0047] Wherein, after adding TTIP, stir and mix for 12-36 hours, preferably: stir and mix for 24 hours.

[0048] (3) Transfer the suspension b prepared by step (2) to a reactor, place it in a constant temperature box, and carry out a hydrot...

Embodiment 1

[0059] Add 0.15 g of CTAB and 0.15 g of DDAB to 40 mL of deionized water at a temperature of 35 ° C and stir overnight at a constant speed, then add 0.68 mL of ammonia water with a volume ratio of 1.7% to the solution, and stir for 2 hours to obtain a mixed solution; Add gTTIP to the above mixed solution, stir at a constant temperature and speed for 12 hours to obtain a milky white suspension; transfer the milky white suspension prepared above to the reactor, and place it in a thermostat at 150°C for a hydrothermal reaction for 24 hours; after the above hydrothermal reaction The milky white suspension was centrifuged, washed, dried, ground, and calcined at 450° C. for 4 hours to obtain titanium dioxide powder.

Embodiment 2

[0061] Add 0.15 g of CTAB and 0.15 g of DDAB to 40 mL of deionized water at a temperature of 35 ° C and stir overnight at a constant speed, then add 0.68 mL of ammonia water with a volume ratio of 1.7% to the solution, and stir for 2 hours to obtain a mixed solution; Add gTTIP dropwise to the above mixed solution, stir at a constant temperature for 24 hours to obtain a milky white suspension; transfer the milky white suspension prepared above to the reactor, and place it in a thermostat at 150°C for a hydrothermal reaction for 24 hours; The resulting milky white suspension was centrifuged, washed, dried, ground, and calcined at 450° C. for 4 hours to obtain titanium dioxide powder.

[0062] Observation with transmission electron microscope and scanning electron microscope, such as figure 1 and figure 2 As shown, the conical titanium dioxide nanorods prepared by this method have a shape of conical nanorods with two pointed ends. The maximum diameter of a single nanorod is ab...

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Abstract

The invention discloses a tapered titanium dioxide nano-rod and a preparation method of the tapered titanium dioxide nano-rod. The tapered nano-rod has a shape with two sharp ends, the size distribution is uniform and the length is in a range of 200nm to 900nm; the maximum diameter of the single nano-rod is 75nm to 85nm and the tapered titanium dioxide nano-rod belongs to a single-crystal anatase phase; the nano-rod has naked {100}, {001} and {101} crystal surfaces; the nano-rod is prepared by the method comprising the following steps: taking tetraisopropyl titanate (TTIP) as a raw material, taking surfactants, namely cetyltrimethylammonium bromide (CTAB), and didodecydimethylammonium bronide (DDAB) as a compound template and taking ammonia water (NH3.H2O) to adjust the pH (Potential of Hydrogen) value of a solvent; carrying out hydrothermal reaction and calcining to obtain the tapered titanium dioxide nano-rod. The tapered titanium dioxide nano-rod has potential application value in the field of catalytic application, and the ratio of the crystal surfaces is properly regulated and controlled to a certain extent through properly adjusting reaction conditions.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a conical titanium dioxide nanorod and a preparation method thereof. Background technique [0002] TiO 2 Due to their inherent advantages, such as wide distribution, low toxicity, good stability, and unique optical and electronic properties, materials have a wide range of applications in photocatalysis, fuel cells, lithium-ion batteries, and sensors. Therefore, whether it is basic research or frontier fields, researchers are interested in TiO 2 Research on materials is on the rise. [0003] Over the past few decades, researchers have devoted themselves to the study of TiO with various morphologies 2 Materials, such as rods, tubes, spheres, wires, and 3D layered structures, etc., different morphologies of TiO 2 have different effects on performance. For TiO 2 In performance research, morphology control is an effective method. The Chinese patent ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C01G23/053B82Y40/00
CPCC01G23/053C01P2002/01C01P2002/72C01P2004/03C01P2004/16C01P2004/64
Inventor 周国伟刘作花郑玉洁高婷婷
Owner QILU UNIV OF TECH
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