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TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material and preparation method thereof

A tio2-ti2o3, H2O technology, applied in the field of photocatalysis and photoelectrochemistry, to achieve the effect of large photocurrent density, small charge transfer resistance, and favorable carrier transfer

Inactive Publication Date: 2020-04-03
TIANJIN CHENGJIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 O is easily converted to TiO at a higher synthesis temperature 2 , the two are difficult to coexist at the same temperature, therefore, so far there is no research on TiO 2 -Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 O heterojunction research

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  • TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material and preparation method thereof
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  • TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material and preparation method thereof

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preparation example Construction

[0051] The invention provides a TiO 2 -Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 The preparation method of O heterojunction material, this preparation method comprises the following steps:

[0052] Step 1: Potassium titanium oxalate (K 2 TiO·(C 2 o 4 ) 2 )K 2 TiO·(C 2 o 4 ) 2 ) into deionized water, stirred until completely dissolved to obtain a certain concentration of K 2 TiO·(C 2 o 4 ) 2 solution;

[0053] Step 2: To the K obtained in Step 1 2 TiO·(C 2 o 4 ) 2 Add a growth promoter into the solution, stir until it is evenly mixed, and use it as a precursor solution;

[0054] Step 3: The precursor solution obtained in Step 2 is subjected to hydrothermal treatment, and after the reaction is completed, a reaction product A is obtained;

[0055] Step 4: After the reaction product A obtained in step 3 is naturally cooled to room temperature, the reaction product A is centrifuged, and the reaction product B is obtained after washing;

[0056] Step 5: Dry the reac...

Embodiment 1

[0068] 0.265g K 2 TiO·(C 2 o 4 ) 2 Add it into 30mL deionized water, stir until completely dissolved, and obtain K with a concentration of 0.025mol / L 2 TiO·(C 2 o 4 ) 2 solution; add 3.0 mL of HCl to K 2 TiO·(C 2 o 4 ) 2 In the solution, stir for 30 minutes until it is evenly mixed, as a precursor solution; transfer the precursor solution to a 100mL polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 120°C for 12 hours to obtain the reaction product A; after the reaction, the reaction kettle Naturally cooled to room temperature, the reaction product A was centrifuged, washed 6 times with deionized water and absolute ethanol to obtain the reaction product B; the reaction product B was dried at 60°C for 6 hours to obtain the Janus morphology TiO 2 -Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 The O heterojunction material has a particle size of 7 μm.

[0069] see figure 1 and figure 2 Shown, for the TiO prepared in Example 1 2 -Ti 2 o 3 (H 2 O) ...

Embodiment 2

[0073] 0.265g K 2 TiO·(C 2 o 4 ) 2 Add it into 30mL deionized water, stir until completely dissolved, and obtain K with a concentration of 0.025mol / L 2 TiO·(C 2 o 4 ) 2 solution; add 2.0 mL of HCl to K 2 TiO·(C 2 o 4 ) 2 In the solution, stir for 20 minutes until it is evenly mixed, and use it as a precursor solution; transfer the precursor solution to a 100mL polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 120°C for 12 hours to obtain the reaction product A; Naturally cooled to room temperature, the reaction product A was centrifuged, washed 5 times with deionized water and absolute ethanol to obtain the reaction product B; the reaction product B was dried at 65°C for 6 hours to obtain the Janus morphology TiO 2 -Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 O heterojunction material, the particle size of which is 6 μm.

[0074] see Figure 5 and Figure 6 Shown, for the TiO prepared in Example 2 2 -Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 The...

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Abstract

The invention provides a TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material and a preparation method thereof. The preparation method of the TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material comprisesthe following steps: adding titanium potassium oxalate into deionized water, and carrying out stirring until the titanium potassium oxalate is completely dissolved to obtain a K2TiO.(C2O4)2 solutionwith a certain concentration; adding hydrochloric acid into the K2TiO.(C2O4)2 solution obtained in the step (1) to serve as a precursor solution; performing hydrothermal treatment on the precursor solution obtained in the step (2) to obtain a reaction product A; naturally cooling the reaction product A obtained in the step (3) to room temperature, centrifugally separating the reaction product A, and carrying out washing to obtain a reaction product B; and drying the reaction product B obtained in the step (4) to obtain the TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material. The TiO2-Ti2O3(H2O)2(C2O4).H2O heterojunction material prepared by the invention is in a Janus morphology, has the characteristics of high photocatalytic activity, small charge transfer resistance, high charge transferefficiency and high photocurrent density, can be synthesized in one step by a simple method, and is simple in preparation process and suitable for popularization and application.

Description

technical field [0001] The invention provides a TiO 2 -Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 The invention discloses an O heterojunction material and a preparation method thereof, belonging to the technical fields of photocatalysis and photoelectrochemistry. Background technique [0002] TiO 2 Photocatalyst materials are widely used in the fields of organic matter degradation, air purification, sewage treatment, photolysis of water for hydrogen / oxygen production due to their simple preparation process, cheap, non-toxic, and good stability. 2 Among the three crystal phases, the anatase phase is often used as a single-phase photocatalyst or photoelectrode due to its most active crystal faces. Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 O is a new type of semiconductor material, often used as an intermediate phase for the synthesis of TiO 2 catalyst of light. [0003] Recent studies have shown that Ti 2 o 3 (H 2 O) 2 (C 2 o 4 )·H 2 O also has high photocatalytic acti...

Claims

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Application Information

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IPC IPC(8): B01J31/12B01J37/10C02F1/32C02F101/30
CPCB01J31/12B01J37/10C02F1/32C02F2101/30C02F2305/10B01J35/33B01J35/39
Inventor 鄂磊胡康慨邢禹豪杨发松朱梦瑶赵巍
Owner TIANJIN CHENGJIAN UNIV
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