Hexagonal flaky titanyl oxalate photocatalyst and preparation method thereof

A technology of titanyl oxalate and photocatalyst, which is applied in the field of photocatalysis, can solve the problems affecting the use of titanyl oxalate photocatalyst, large particle size and different shapes of titanyl oxalate photocatalyst, and achieve good photocatalysis Activity, uniform dispersion, simple and easy-to-control preparation process

Active Publication Date: 2019-04-19
TIANJIN CHENGJIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The titanyl oxalate photocatalyst prepared by the water bath method has the disadvantages of large part

Method used

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  • Hexagonal flaky titanyl oxalate photocatalyst and preparation method thereof
  • Hexagonal flaky titanyl oxalate photocatalyst and preparation method thereof
  • Hexagonal flaky titanyl oxalate photocatalyst and preparation method thereof

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preparation example Construction

[0037] A preparation method of hexagonal plate-shaped titanyl oxalate photocatalyst, comprising the following steps:

[0038] Step 1: 1.25-3.75g titanium sulfate [Ti(SO 4 ) 2 ] was added to 50mL deionized water, and stirred until completely dissolved to obtain a concentration of 0.1-0.3mol / L of Ti(SO 4 ) 2 solution, the titanyl oxalate photocatalyst prepared in this concentration range has a hexagonal plate shape; because when Ti(SO 4 ) 2 When the concentration of the solution is too high, the titanyl oxalate is hydrolyzed, and the hexagonal flake morphology is destroyed to become flocculent particles, which cannot be regrown to form the hexagonal flake morphology in the subsequent reaction process.

[0039] Step 2: To the Ti(SO 4 ) 2 Add 0.358-1.074g ammonium oxalate [(NH 4 ) 2 C 2 o 4 ·H 2 O], stir 20-40min to dissolve completely, it is advisable to not splash on the beaker wall with solution when stirring, make precursor solution, ammonium oxalate [(NH 4 ) 2 C ...

Embodiment 1

[0044] 2.50g Ti(SO 4 ) 2 Add it into 50mL deionized water, stir until completely dissolved, and prepare a concentration of 0.2mol / L Ti(SO 4 ) 2 solution; 0.716g (NH 4 ) 2 C 2 o 4 ·H 2 O added to Ti(SO 4 ) 2 In the solution, stir for 20 minutes until completely dissolved, as a precursor solution; transfer the precursor solution to a 100mL reactor, and conduct a hydrothermal reaction at 90°C for 5 hours to obtain the reaction product A; after the reaction, the reactor is naturally cooled to room temperature , the reaction product A was centrifuged, washed with deionized water to pH = 7, and then washed 4 times with absolute ethanol to obtain the reaction product B; the reaction product B was dried at 70°C for 3 hours to obtain hexagonal flaky oxalic acid Oxytitanium salt photocatalyst, white powder, hexagonal plate diameter is 4μm, hexagonal plate thickness is 1.5μm.

[0045] refer to figure 1 and figure 2 , the hexagonal flaky titanyl oxalate photocatalyst prepared...

Embodiment 2

[0047] 1.25g Ti(SO 4 ) 2 Added into 50mL deionized water, stirred until completely dissolved, and prepared Ti(SO 4 ) 2 solution; 0.358g (NH 4 ) 2 C 2 o 4 ·H 2 O added to Ti(SO 4 ) 2 In the solution, stir for 20 minutes until completely dissolved, as a precursor solution; transfer the precursor solution to a 100mL reactor, and conduct a hydrothermal reaction at 90°C for 5 hours to obtain the reaction product A; after the reaction, the reactor is naturally cooled to room temperature , the reaction product A was centrifuged, washed with deionized water to pH = 7, and then washed 4 times with absolute ethanol to obtain the reaction product B; the reaction product B was dried at 70°C for 3 hours to obtain hexagonal flaky oxalic acid The photocatalyst powder of oxytitanium salt is a white powder, the diameter of the hexagonal plate is 3 μm, and the thickness of the hexagonal plate is 0.8 μm.

[0048] refer to image 3 and Figure 4 , the hexagonal flaky titanyl oxalate p...

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Abstract

The invention provides a hexagonal flaky titanyl oxalate photocatalyst and a preparation method thereof. The method comprises the following steps: adding titanium sulfate [Ti(SO4)2] into deionized water, stirring until the titanium sulfate [Ti(SO4)2] is completely dissolved, adding ammonium oxalate [(NH4.2C2O4 H2O] into the solution, stirring until the titanium sulfate [Ti(SO4)2] is completely dissolved, and a precursor solution is obtained; transferring the precursor solution into a 100mL reaction kettle, and carrying out hydrothermal reaction at a certain temperature to obtain a reaction product A; after the reaction is finished, and the reaction kettle is naturally cooled to room temperature, the obtained reaction product A is centrifugally separated and washed by deionized water and absolute ethyl alcohol respectively to obtain a reaction product B; and drying the reaction product B to obtain the hexagonal flaky titanyl oxalate photocatalyst powder. The hexagonal flaky titanyl oxalate photocatalyst prepared by the method has the particle diameter of 1.5-4 micrometers and the thickness of 0.6-1.5 micrometers, and has excellent ultraviolet light catalytic activity; and the surface (200) is the main photocatalytic activity surface of the hexagonal flaky titanyl oxalate photocatalyst.

Description

technical field [0001] The invention relates to a hexagonal flaky titanyl oxalate photocatalyst and a preparation method thereof, belonging to the technical field of photocatalysis. Background technique [0002] In recent years, photocatalyst materials have been widely used in environmental treatment. Compared with traditional photocatalyst materials, titanyl oxalate, as a new type of photocatalyst, has the advantages of low production cost, stable shape, good particle dispersibility, light Excellent catalytic performance and so on. [0003] At present, the preparation methods of titanyl oxalate photocatalyst materials mainly include hydrothermal method and water bath method. The titanyl oxalate photocatalyst prepared by the water bath method has the disadvantages of large particle size and various shapes, which affect the use of titanyl oxalate photocatalyst to a certain extent. The hydrothermal method can obtain stable morphology, complete grain growth, uniform particle ...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J37/10C07C51/41C07C55/07C02F1/32C02F101/30
CPCC02F1/32C07C51/418B01J31/2213B01J35/004B01J37/10C02F2101/30C02F2305/10C07C55/07
Inventor 鄂磊胡康慨李天昊赵丹赵巍
Owner TIANJIN CHENGJIAN UNIV
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