Controllable synthesis method of nonmetallic ion-doped nano titanium dioxide by phase separation-hydrolysis solvothermal method

A nano-titanium dioxide, solvothermal technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of low doping efficiency, poor universality, complex process, etc., and achieve strong light absorption. , The effect of low equipment requirements and simple process

Inactive Publication Date: 2010-11-17
HEILONGJIANG UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low doping efficiency, complex process, high cost and poor universality of the existing method for synthesizing non-metallic ion-doped nano-titanium dioxide, and to provide a controllable method using phase separation-hydrolysis solvothermal method. Method for synthesizing non-metallic ion-doped nano-titanium dioxide

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  • Controllable synthesis method of nonmetallic ion-doped nano titanium dioxide by phase separation-hydrolysis solvothermal method
  • Controllable synthesis method of nonmetallic ion-doped nano titanium dioxide by phase separation-hydrolysis solvothermal method
  • Controllable synthesis method of nonmetallic ion-doped nano titanium dioxide by phase separation-hydrolysis solvothermal method

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specific Embodiment approach 1

[0007] Specific embodiment 1: In this embodiment, the method for controlling the synthesis of non-metallic ion-doped nano-titanium dioxide by phase separation-hydrolysis solvothermal method is realized according to the following steps: 1. The volume of butyl titanate and toluene is 1:3 Stir for 20-40 minutes after mixing to obtain an organic phase; 2. Add an aqueous solution of non-metal ions with a concentration of 1.5-2.0 mol / L into the autoclave, then put the organic phase into a U-shaped tank and place it in a non-metallic In the aqueous solution of ions (water phase), the liquid level of the aqueous solution of non-metallic ions is located below the top surface of the U-shaped tank, and then the lid is covered, and then solvothermal reaction is performed at 140~180°C for 5~7h, cooled to room temperature, and filtered ; 3. Under the condition of 100~140℃, the precipitate obtained by filtering in step 2 is dried with dimethyl silicone oil bath for 1h, ground, heated to 300~4...

specific Embodiment approach 2

[0009] Embodiment 2: This embodiment is different from Embodiment 1 in that the stirring time described in Step 1 is 30 minutes. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the non-metallic ion aqueous solution described in step 2 is ammonia solution, thiourea solution or sodium sulfide solution. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates a controllable synthesis method of nonmetallic ion-doped nano titanium dioxide by a phase separation-hydrolysis solvothermal method, in particular to a synthesis method of nonmetallic ion-doped nano titanium dioxide, which solves the problems of low doping efficiency, complicated process, high cost and poor universality of the existing nonmetallic ion doping method of the nano titanium dioxide. The synthesis method comprises the following steps: 1, mixing tetrabutyl titanate with methylbenzene and then stirring to obtain an organic phase; 2, adding nonmetallic ion aqueous solution to a high-pressure reaction kettle, placing the organic phase into a U-shaped groove, placing the groove into the nonmetallic ion aqueous solution, covering, carrying out solvothermal treatment, cooling and filtering; and 3, drying by oil bath and then roasting to obtain the nonmetallic ion-doped nano titanium dioxide. The synthesis method of the invention has simple process, high doping efficiency, low cost and wide applicability; and the obtained nano titanium dioxide has high crystallization degree and good visible light catalytic activity, thus the nano titanium dioxide can be applied to visible light catalytic degradation of organic pollutants.

Description

technical field [0001] The invention relates to a method for synthesizing non-metallic ion-doped nano titanium dioxide. Background technique [0002] Semiconductor photocatalytic technology has been paid attention to due to its outstanding advantages such as simple operation, mild reaction conditions, and no secondary pollution. Among many semiconductor photocatalysts, titanium dioxide is favored due to its high activity, good stability, strong light corrosion resistance, cheap price, safety and non-toxicity. The wide band gap makes titanium dioxide have high photocatalytic activity, but also limits its application range to ultraviolet light. Doping with non-metallic ions is an effective method to broaden the photoresponse range of titanium dioxide and improve its catalytic activity under visible light. The current method of synthesizing non-metallic ion-doped nano-titanium dioxide is usually to mechanically stir with the material containing non-metallic elements after the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/10B01J27/24B01J27/04
Inventor 井立强谢明政栾云博付宏刚
Owner HEILONGJIANG UNIV
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