Rare earth-doped bismuth vanadate material with dual function characteristics of up-conversion single-red-light emission and photocatalysis and preparation method and application of rare earth-doped bismuth vanadate material

A bifunctional material, rare earth doping technology, applied in luminescent materials, chemical instruments and methods, fluorescence/phosphorescence, etc., can solve the problems of unstable materials and complicated preparation methods, and achieve simple conditions, simple preparation processes, and high efficiency. The effect of large-scale commercial preparation and application prospects

Active Publication Date: 2018-12-04
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional multifunctional materials are composed of a variety of materials with different properties, the preparation method is complicated, and the materials are very unstable.

Method used

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  • Rare earth-doped bismuth vanadate material with dual function characteristics of up-conversion single-red-light emission and photocatalysis and preparation method and application of rare earth-doped bismuth vanadate material
  • Rare earth-doped bismuth vanadate material with dual function characteristics of up-conversion single-red-light emission and photocatalysis and preparation method and application of rare earth-doped bismuth vanadate material
  • Rare earth-doped bismuth vanadate material with dual function characteristics of up-conversion single-red-light emission and photocatalysis and preparation method and application of rare earth-doped bismuth vanadate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 Rare earth doped BiVO 4 Preparation of bifunctional materials

[0046] (1) Preparation of sol:

[0047] First, measure 80ml of deionized water with a graduated cylinder and pour it into a 100ml beaker, add 0.847mmol of bismuth nitrate, 0.15mmol of ytterbium nitrate, 0.003mmol of thulium nitrate and 2mmol of citric acid into the 10% 20ml nitric acid solution, and stir evenly for 0.5h. Solution A was obtained; 1mmol of ammonium metavanadate and 2mmol of citric acid were added to 10ml of deionized water, stirred for 0.5h to obtain solution A; solution A was slowly dropped into solution B and fully stirred to form solution C. After the stirring is completed, the obtained solution is evaporated in a water bath at 80° C. to obtain a gel; then placed in an oven at 80° C. for 10 hours to dry the wet gel to obtain a dry gel.

[0048] (2) Preparation of rare earth doped BiVO 4 Dual function material:

[0049] Grind a certain amount of xerogel into powder and pour it...

Embodiment 2

[0050] Example 2 Rare earth-doped BiVO with different Yb doping amounts 4 Preparation of bifunctional materials

[0051] Different doping ratio BiVO 4 -xYb-Tm (x=5%, 10%, 15%, 20%, 25%) preparation method is the same as embodiment 1, and difference is: ytterbium nitrate addition is the corresponding proportional multiple of the above-mentioned dropwise amount in embodiment 1 .

[0052] BiVO with different doping ratios prepared by the above method 4 The X-ray diffraction pattern of -xYb-Tm (x=5%, 10%, 15%, 20%, 25%) is as figure 1 shown by figure 1 (a) It can be seen that when the doping amount of Yb obtained by calcination is as high as 20%, the BiVO 4 -Yb-Tm is pure monoclinic bismuth vanadate (JCPDS no.83-1698), and no other phase peaks appear. The tetragonal phase of BiVO was detected when the doping amount of Yb was up to 25% 4 peak. Depend on figure 1 (b) It can be seen that as the doping amount of Yb increases, the diffraction peak (121) crystal plane shifts in...

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Abstract

The invention discloses a rare earth-doped bismuth vanadate material with dual function characteristics of up-conversion single-red-light emission and photocatalysis and a preparation method and application of the rare earth-doped bismuth vanadate material. The rare earth-doped bismuth vanadate material BiVO4:Re<3+> is prepared by adopting a monoclinic phase BiVO4 as a matrix material and doping the matrix material with rare earth ions, wherein the rare earth ions Re<3+> are a mixture of Yb<3+> and Tm<3+>. It is found through experimental researches that intense red light at 620-720 nm can beemitted by the bifunctional material under the excitation of laser of 980 nm; and organic matter can be degraded under infrared illumination, for example, 90% of methylene blue can be degraded within2 h, and the organic matter degrading speed of the material is faster than that of pure BiVO4 under visible light, so that it is shown that the material has a great and potential application value inbiomarker, photodynamic therapy, photocatalytic degradation of organic pollutants and other fields; the synthesis method of the material has simple conditions, no pollution, high stability and good commercial application prospects.

Description

technical field [0001] The invention belongs to the technical field of up-conversion materials and photocatalytic materials, and specifically relates to a rare-earth-doped bismuth vanadate material with up-conversion single red light emission and photocatalytic dual-function characteristics, and a preparation method and application thereof. Background technique [0002] Up-conversion luminescence, a process that converts infrared light into ultraviolet-visible light, has attracted much attention recently. Compared with commonly used organic fluorescent materials and quantum dots, upconversion luminescent materials based on doped rare earth ions are due to their superior properties (such as high chemical stability, long lifetime, sharp emission bands, excellent photostability, low toxicity and weak background autofluorescence). Therefore, upconverting luminescent materials doped with rare earth ions are used in various applications. Upconverting luminescent materials are re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C02F1/30C02F1/32C09K11/82G01N21/64G01N21/63C02F101/30
CPCB01J23/22B01J35/004C02F1/30C02F1/32C02F2101/308C09K11/7794G01N21/63G01N21/64
Inventor 张晓阳黄慧宁黄柏标王泽岩王朋秦晓燕刘媛媛张倩倩
Owner SHANDONG UNIV
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