Graphene/titanium dioxide/bismuth oxyiodide ternary complex as well as preparation method and application thereof

A ternary compound and titanium dioxide technology, applied in chemical instruments and methods, water treatment of special compounds, catalyst activation/preparation, etc., can solve the problems of catalytic performance to be further improved, poor reusability, etc., to achieve enhanced reusability , reduce recombination rate and prolong life

Inactive Publication Date: 2019-01-18
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a graphene/titanium dioxide/bismuth oxyiodide ternary compound and its preparation method and application, aimi...

Method used

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  • Graphene/titanium dioxide/bismuth oxyiodide ternary complex as well as preparation method and application thereof
  • Graphene/titanium dioxide/bismuth oxyiodide ternary complex as well as preparation method and application thereof
  • Graphene/titanium dioxide/bismuth oxyiodide ternary complex as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0044] A kind of preparation method of graphene / titanium dioxide / bismuth oxyiodide ternary compound:

[0045] Step 1, measure 5mL of tetrabutyl titanate and dissolve it in a mixed solution of 2ml of glacial acetic acid and 20ml of absolute ethanol to obtain tetrabutyl titanate solution;

[0046]Step 2: Weigh 2 mg of graphene oxide and dissolve it in 20 ml of 85% ethanol aqueous solution, sonicate for 10 min, and add 0.2 ml of concentrated nitric acid dropwise therein to obtain a graphene oxide dispersion;

[0047] Step 3. Add the tetrabutyl titanate solution dropwise to the graphene oxide dispersion at 0°C. After the dropwise addition, stir for 3 hours, and transfer the stirred suspension to a 100ml polytetrafluoroethylene-containing In a vinyl fluoride-lined high-pressure hydrothermal reactor, keep at 180°C for 7.5 hours. After the reaction is completed, cool to room temperature to obtain a graphene / titanium dioxide binary composite;

[0048] Step 4, the reaction solution is...

Embodiment 2

[0050] Step 1. Measure 5mL of tetrabutyl titanate and dissolve it in a mixed solution of 1.2ml of glacial acetic acid and 17.5ml of absolute ethanol to obtain tetrabutyl titanate solution;

[0051] Step 2: Weighing 1.5 mg of graphene oxide and dissolving it in 18 ml of 60% ethanol aqueous solution, sonicating for 10 min, and adding 0.1 ml of concentrated nitric acid dropwise thereto to obtain a graphene oxide dispersion;

[0052] Step 3. Add the tetrabutyl titanate solution dropwise to the graphene oxide dispersion at 2°C. After the dropwise addition, stir for 3 hours, and transfer the stirred suspension to a 100ml polytetrafluoroethylene-containing In a vinyl fluoride-lined high-pressure hydrothermal reactor, keep at 175°C for 8 hours, and after the reaction is completed, cool to room temperature to obtain a graphene / titanium dioxide binary composite;

[0053] Step 4: Add the reaction solution to the mixed solution of 4.1mL potassium iodide and sodium acetate (the concentrati...

Embodiment 3

[0055] Step 1. Dissolve 5 mL of tetrabutyl titanate in a mixed solution of 2.8 mL of glacial acetic acid and 22.5 mL of absolute ethanol to obtain a tetrabutyl titanate solution;

[0056] Step 2: Weigh 3 mg of graphene oxide and dissolve it in 20 ml of 70% ethanol aqueous solution, sonicate for 10 min, and add 0.3 ml of concentrated nitric acid dropwise therein to obtain a graphene oxide dispersion;

[0057] Step 3. Add the tetrabutyl titanate solution dropwise to the graphene oxide dispersion at 5°C. After the dropwise addition, stir for 3 hours, and transfer the stirred suspension to a 100ml polytetrafluoroethylene-containing In a vinyl fluoride-lined high-pressure hydrothermal reactor, keep at 190°C for 7 hours, and after the reaction is completed, cool to room temperature to obtain a graphene / titanium dioxide binary composite;

[0058] Step 4: Add the reaction solution to the mixed solution of 29.6mL potassium iodide and sodium acetate (the concentration of potassium iodid...

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Abstract

The invention provides a graphene/titanium dioxide/bismuth oxyiodide ternary complex as well as a preparation method thereof. The complex is prepared by preparing a graphene/titanium dioxide binary complex by virtue of the reaction of graphene oxide and tetrabutyl titanate, and then enabling a bismuth salt, potassium iodide and the binary complex to react, wherein the weight ratio of graphene to titanium dioxide to bismuth oxyiodide in the ternary complex is 1: (500 to 600): (400 to 270). By virtue of the synergistic effect of titanium dioxide, graphene and bismuth oxyiodide, the photocatalytic efficiency of the material can be significantly improved, the reusability of the material can be improved, the preparation process is simple, the reaction condition is mild, the cost is low, the production is easy to enlarge, organic pollutants can be effectively degraded, and the application prospect is good.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a graphene / titanium dioxide / bismuth oxyiodide ternary compound and its preparation method and application. Background technique [0002] Titanium dioxide is used in many industrial fields due to its high chemical stability, thermal stability and excellent optical, mechanical and electrical properties. Anatase TiO 2 It has good photocatalytic activity, especially when the particle size is reduced to the nanometer level, the catalytic ability is better, and it has a wide range of applications in the catalytic degradation of environmental organic pollutants. However, due to the anatase TiO 2 The band gap is wide, and the band gap energy is 3.2eV, so it only responds in the ultraviolet region, and the utilization rate of solar energy is relatively low. In addition, during the photocatalytic process, the rapid recombination of photogenerated carriers also seriously red...

Claims

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Application Information

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IPC IPC(8): B01J27/135B01J37/10B01J37/34C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J27/135B01J35/004B01J37/10B01J37/343C02F1/30C02F2101/30C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2305/10
Inventor 姚静文张艳峰
Owner HEBEI NORMAL UNIV
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