Vanadium tantalum/niobate photocatalyst and preparation method and application of vanadium tantalum/niobate photocatalyst

A technology of photocatalyst and niobate, applied in the direction of physical/chemical process catalyst, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of not being able to make full use of sunlight and the utilization rate of sunlight Low, no catalytic activity, etc., to achieve the effect of easy modification and application, simple preparation method, and good particle size

Inactive Publication Date: 2016-02-03
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Photocatalytic technology is an emerging technology in the field of energy and environment. Typical photocatalysts such as TiO 2 It needs to be irradiated by ultraviolet light to have high photocatalytic activity. The proportion of ultraviolet light in sunlight is about 4%, and the energy of sunlight is mainly concentrated in the visible light range of 400-700nm, which is harmful to sunlight during use. The utilization rate of TiO is low, while TiO 2 It is not catalytically active in the visible light range, so the current photocatalytic technology cannot make full use of sunlight

Method used

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  • Vanadium tantalum/niobate photocatalyst and preparation method and application of vanadium tantalum/niobate photocatalyst
  • Vanadium tantalum/niobate photocatalyst and preparation method and application of vanadium tantalum/niobate photocatalyst
  • Vanadium tantalum/niobate photocatalyst and preparation method and application of vanadium tantalum/niobate photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Prepare Nb by high temperature solid phase method 9 VO 25 .

[0035] (1) According to the chemical formula Nb 9 VO 25 The stoichiometric ratio of each element in , respectively weighed Nb 2 o 5 : 5.962 g, NH 4 VO 3 : 0.585g, ground in an agate mortar and mixed well;

[0036] (3) Pre-calcine the mixture obtained in step (2) in an air atmosphere in a muffle furnace at 350°C for 5 hours, after natural cooling, take out the sample, mix and grind the mixture thoroughly again;

[0037] (3) Calcinate the mixture obtained in step (2) again at 930°C for 3 hours in an air atmosphere, cool to room temperature, take it out and grind it sufficiently to obtain Nb 9 VO 25 Photocatalyst powder.

[0038] Such as figure 1 Shown, the Nb prepared in Example 1 9 VO 25 The X-ray powder diffraction pattern of the sample is exactly the same as the standard structure card, and the prepared vanadate Nb in the XRD experiment 9 VO 25It is a single-phase material withou...

Embodiment 2

[0043] Embodiment 2: Prepare Nb by high temperature solid phase method 9 VO 25 .

[0044] (1) According to the chemical formula Nb 9 VO 25 The stoichiometric ratio of each element in , respectively weighed Nb 2 o 5 : 4.77 g, V 2 o 5 : 0.364 g, carefully ground in an agate mortar until the powder sample is evenly mixed;

[0045] (3) Pre-calcine the mixture obtained in step (2) in an air atmosphere in a muffle furnace at 450°C for 2 hours, after natural cooling, fully mix and grind the mixture again;

[0046] (3) Calcinate the mixed sample obtained in step (2) again at 850°C for 8 hours in an air atmosphere, cool to room temperature, take it out and grind it sufficiently to obtain Nb 9 VO 25 Photocatalyst powder.

[0047] Known through experiment, the Nb that present embodiment obtains 9 VO 25 Photocatalyst has pure phase, X-ray powder diffraction pattern embodiment 1 obtains figure 1 Same. Sample Nb 9 VO 25 The main structure and morphology of the photocatalyst,...

Embodiment 3

[0048] Embodiment 3: adopt chemical solution method to prepare Nb 9 VO 25 .

[0049] (1) According to the chemical formula Nb 9 VO 25 The stoichiometric ratio of each element in the NbCl 5 : 6.0752 g, NH 4 VO 3 : 0.293 grams, respectively dissolved in deionized or dilute nitric acid, and add an appropriate amount of citric acid for complexation, after stirring, A and B solutions are obtained, after heating and stirring, mix the two solutions, and continue stirring until forming a gel;

[0050] (2) Place the obtained gel in an oven at 85°C for 12 hours;

[0051] (3) Naturally cool the product obtained in the previous step, take out the precursor, and calcine it in an air atmosphere at a calcination temperature of 800°C and a calcination time of 20 hours. After taking it out and fully grinding it, the Nb 9 VO 25 Photocatalyst powder.

[0052] Known through experiment, the Nb that present embodiment obtains 9 VO 25 Photocatalyst has pure phase, X-ray powder diffraction...

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Abstract

The invention discloses a vanadium tantalum / niobate photocatalyst and a preparation method and application of the vanadium tantalum / niobate photocatalyst. The general chemical formula of the vanadium tantalum / niobate photocatalyst is M9VO25(M=Ta, Nb), wherein M refers to one of Ta and Nb, and the vanadium tantalum / niobate photocatalyst can be prepared by adopting a high-temperature solid phase reaction method or a chemical solution method, and the prepared M9VO25 has a good photocatalytic effect under the irradiation of visible light. The preparation process is simple and feasible to operate; the granularity is even; the chemical stability is good; the industrial production is convenient; organic pollutants can be degraded well.

Description

technical field [0001] The invention relates to a vanadium tantalum / niobate photocatalyst and its preparation method and application, which belongs to the field of inorganic photocatalytic materials and is especially suitable for degrading organic dyes and other pollutants. Background technique [0002] At present, environmental pollution is becoming more and more serious, and it is one of the focal issues that the world pays close attention to. For example, the ever-increasing environmental pollution has led to the continuous decline in the quality of people's drinking water and industrial water sources, resulting in increasing air pollution, causing continuous damage to the ecological environment, and posing a serious threat to human survival. In order to solve these problems, people control and control environmental pollution through various methods. Among them, the application of photocatalytic reaction has been paid more and more attention. The so-called photocatalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22
Inventor 乔学斌
Owner XUZHOU NORMAL UNIVERSITY
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