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Method for synthetizing carbon-doped monoclinic phase mesoporous bismuth vanadate

A technology of porous bismuth vanadate and monoclinic phase, applied in the field of synthesizing carbon-doped monoclinic phase mesoporous bismuth vanadate, can solve problems that have not been seen yet, achieve good photocatalytic performance and improve adsorption performance

Inactive Publication Date: 2013-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on carbon-doped monoclinic mesoporous bismuth vanadate in the literature so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to silica airgel microspheres: glucose: water = 1:0.02:20 mass fraction ratio mixed, after drying to obtain the composite of silica airgel microspheres / glucose as a template; according to nitric acid: ethanol: nitric acid Bismuth=1:15:0.5 parts by mass is taken, ultrasonic 30min obtains bismuth nitrate solution; The ammonium vanadate solution is slowly added dropwise to the bismuth nitrate solution to obtain a mixed solution of ammonium metavanadate and bismuth nitrate, and then the template is added; wherein, the mass ratio of the mixed solution of ammonium metavanadate and bismuth nitrate to the template is 1:0.1 . Vacuum was applied to fully inject the mixed solution into the template, and a solid product was obtained after reacting at 60° C. for 24 h. In the tube furnace, under the protection of nitrogen, press 0.5℃·min -1 The solid product was heated to 200°C at a heating rate of 5 h. After naturally cooling down to room temperature, use 2mol·L -1 Sod...

Embodiment 2

[0015] According to silica airgel microspheres: glucose: water = 1:0.05:50 mass fraction ratio mixed, after drying, the composite of silica airgel microspheres / glucose is obtained as a template; according to nitric acid: ethanol: nitric acid Bismuth=1:15:0.5 parts by mass is taken, ultrasonic 30min obtains bismuth nitrate solution; The ammonium vanadate solution is slowly added dropwise to the bismuth nitrate solution to obtain a mixed solution of ammonium metavanadate and bismuth nitrate, and then the template is added, wherein the mass ratio of the mixed solution of ammonium metavanadate and bismuth nitrate to the template is 1:0.11 . Vacuum was applied to fully inject the mixed solution into the template, and a solid product was obtained after reacting at 70° C. for 20 h. In a tube furnace, under the protection of nitrogen, press 1°C min -1 The solid product was heated to 300° C. at a constant temperature for 3 hours. After naturally cooling down to room temperature, use...

Embodiment 3

[0017] According to the silica airgel microspheres: glucose: water = 1:0.07:70 mass fraction ratio mixed, after drying, the composite of silica airgel microspheres / glucose is obtained as a template; according to nitric acid: ethanol: nitric acid Bismuth=1:15:0.5 parts by mass is taken, ultrasonic 30min obtains bismuth nitrate solution; The ammonium vanadate solution is slowly added dropwise to the bismuth nitrate solution to obtain a mixed solution of ammonium metavanadate and bismuth nitrate, and then the template is added, wherein the mass ratio of the mixed solution of ammonium metavanadate and bismuth nitrate to the template is 1:0.12 . Vacuum was applied to fully inject the mixed solution into the template, and a solid product was obtained after reacting at 80° C. for 18 h. In a tube furnace, under the protection of nitrogen, press 2°C·min -1 The solid product was heated to 400° C. at a heating rate of 2.5 hours. After naturally cooling down to room temperature, use 2m...

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Abstract

The invention relates to a method for synthetizing carbon-doped monoclinic phase mesoporous bismuth vanadate. The method comprises the steps of mixing silica aerogel microspheres, glucose and water according to the mass fraction ratio of 1 to (0.02-0.2) to (20-200), drying to obtain a compound as a template; taking nitric acid, ethanol and bismuth nitrate according to the mass fraction ratio of 1 to 15 to 0.5, and carrying out ultrasonic treatment to obtain bismuth nitrate solution; taking nitric acid, ethanol and ammonium metavanadate according to the mass fraction ratio of 1 to 15 to 0.125, and carrying out ultrasonic treatment to obtain ammonium metavanadate solution; slowly dripping the ammonium metavanadate solution into the bismuth nitrate solution to obtain a mixed solution; adding the template to the mixed solution, vacuuming to fully inject the mixed solution into the template, and reacting for 6-24 hours at 60-110 DEG C to obtain a solid product; heating the solid product to 200-600 DEG C at the heating speed of 0.5-10 DEG C.min<-1> in a tube furnace under the protection of nitrogen, and keeping constant temperature for 0.5-5 hours; and naturally cooling to room temperature and then removing the silica aerogel microspheres by sodium hydroxide solution to obtain carbon-doped monoclinic phase mesoporous bismuth vanadate. Carbon-doped monoclinic phase mesoporous bismuth vanadate disclosed by the invention has good photocatalytic performance within the range of a visible light.

Description

technical field [0001] The invention relates to a method for synthesizing carbon-doped monoclinic mesoporous bismuth vanadate. The obtained carbon-doped monoclinic mesoporous bismuth vanadate has good photocatalytic performance in the range of visible light and belongs to the technical field of environmental protection. Background technique [0002] Photocatalytic technology is a green technology with broad application prospects in the fields of energy and environment. Using this technology, low-density solar energy can be converted into high-density chemical energy or electrical energy, or sunlight can be directly used to degrade various pollutants in water and air. Therefore, photocatalytic technology is very important in environmental purification and new energy development. Has great potential. TiO 2 Photocatalytic materials have a wide range of applications in organic degradation and air purification. However, due to TiO 2 The material has a wide band gap and only r...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J35/10
Inventor 姚明明刘明贤甘礼华
Owner TONGJI UNIV
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