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Hydrothermal preparation method for rod-like BiVO4 by aid of sodium oleate and application of rod-like BiVO4 to photocatalysis

A sodium oleate, rod-shaped technology, applied in the field of BiVO4 photocatalyst preparation, to achieve the effect of improving degradation efficiency and inhibiting recombination efficiency

Inactive Publication Date: 2019-03-12
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, with sodium oleate as surfactant, NH 4 VO 3 and Bi(NO 3 ) 3 ·5H 2 BiVO was prepared by a hydrothermal method with O as the metal source and the pH adjusted with ammonia water 4 method has not yet been reported

Method used

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  • Hydrothermal preparation method for rod-like BiVO4 by aid of sodium oleate and application of rod-like BiVO4 to photocatalysis
  • Hydrothermal preparation method for rod-like BiVO4 by aid of sodium oleate and application of rod-like BiVO4 to photocatalysis
  • Hydrothermal preparation method for rod-like BiVO4 by aid of sodium oleate and application of rod-like BiVO4 to photocatalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 0.6025g Bi(NO 3 ) 3 ·5H 2 O (1.25mmol) and 0.14625g NH 4 VO 3 respectively with 3.6mLHNO 3 Dissolve together in 22mL of water. Stir for 2 h under a magnetic stirrer at a constant temperature of 40°C to fully dissolve it. at Bi(NO 3 ) 3 ·5H 2 Add sodium oleate (SO) of the same amount to the O solution, stir and dissolve fully, add NH 4 VO 3 The solution was added therein at a rate of 2 seconds per drop, and the magnetic stirrer was kept in normal operation during the dropwise addition. The pH was adjusted to 5 with ammonia water, and the ammonia water was added dropwise for 2 seconds. During the dropwise addition, the magnetic stirrer was also kept in normal operation. After the dropwise addition, ultrasonication was performed for 15 minutes, followed by stirring at a constant temperature of 40° C. for 45 minutes, and this was repeated three times. Then pour the sample into a polytetrafluoroethylene hydrothermal reaction kettle. Heating at a constant tempera...

Embodiment 2

[0025] 0.6025g Bi(NO 3 ) 3 ·5H 2 O (1.25mmol) and 0.14625g NH 4 VO 3 . respectively with 3.6mLHNO 3 Dissolve together in 22mL of water. Stir for 2 h under a magnetic stirrer at a constant temperature of 40°C to fully dissolve it. at Bi(NO 3 ) 3 ·5H 2 Add sodium oleate (SO) of the same amount to the O solution, stir and dissolve fully, add NH 4 VO 3The solution was added therein at a rate of 2 seconds per drop, and the magnetic stirrer was kept in normal operation during the dropwise addition. The pH was adjusted to 7 with ammonia water, and the ammonia water was added dropwise at a rate of 2 seconds. During the dropwise addition, the magnetic stirrer was also kept in normal operation. After the dropwise addition, ultrasonication was performed for 15 minutes, followed by stirring at a constant temperature of 40° C. for 45 minutes, and this was repeated three times. Then pour the sample into a polytetrafluoroethylene hydrothermal reaction kettle. Heating at a const...

Embodiment 3

[0028] 0.6025g Bi(NO 3 ) 3 ·5H 2 O (1.25mmol) and 0.14625g NH 4 VO 3 . respectively with 3.6mLHNO 3 Dissolve together in 22mL of water. Stir for 2 h under a magnetic stirrer at a constant temperature of 40°C to fully dissolve it. at Bi(NO 3 ) 3 ·5H 2 Add sodium oleate (SO) of the same amount to the O solution, stir and dissolve fully, add NH 4 VO 3 The solution was added therein at a rate of 2 seconds per drop, and the magnetic stirrer was kept in normal operation during the dropwise addition. The pH was adjusted to 9 with ammonia water, and the ammonia water was added dropwise for 2 seconds. During the dropwise addition, the magnetic stirrer was also kept in normal operation. After the dropwise addition, ultrasonication was performed for 15 minutes, followed by stirring at a constant temperature of 40° C. for 45 minutes, and this was repeated three times. Then pour the sample into a polytetrafluoroethylene hydrothermal reaction kettle. Heating at a constant temp...

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Abstract

The invention discloses a hydrothermal preparation method for rod-like BiVO4 by the aid of sodium oleate. The hydrothermal preparation method includes separately dissolving NH4VO3 and Bi(NO3)3 5H2O and then adding a surfactant SO (sodium oleate) into Bi(NO3)3 5H2O solution to obtain solution B; adding NH4VO3 solution into the solution B to obtain mixed solution, regulating the pH (potential of hydrogen) of the mixed solution until the mixed solution is neutral and carrying out ultrasonic and constant-temperature stirring circulation by 2-5 times; pouring the mixed solution into polytetrafluoroethylene hydrothermal reaction kettles, heating the polytetrafluoroethylene hydrothermal reaction kettles at the temperatures of 170-190 DEG C, keeping the temperatures of the polytetrafluoroethylenehydrothermal reaction kettles constant for 16-20 hours, naturally cooling the polytetrafluoroethylene hydrothermal reaction kettles until the temperatures of the polytetrafluoroethylene hydrothermal reaction kettles reach the room temperature and carrying out treatment to obtain ultimate products. The hydrothermal preparation method has the advantages that the sodium oleate is used as the surfactant, the NH4VO3 and the Bi(NO3)3 5H2O are used as metal sources, pH values are regulated by ammonia water, and monoclinic-phase BiVO4 can be prepared by the aid of hydrothermal processes; the gap in the aspect of preparing BiVO4 photocatalysts by the aid of surfactants can be filled by the aid of the hydrothermal preparation method, the photon-generated current carrier and hole recombination efficiency can be effectively inhibited by the BiVO4 prepared by the aid of the sodium oleate used as the surfactant, and the degradation efficiency can be greatly improved; the rhodamine B degradation rateof the prepared BiVO4 can reach 80% under the condition of ultraviolet light irradiation after 80 min.

Description

technical field [0001] The invention discloses a BiVO for photocatalytic degradation of dye wastewater prepared by using surfactant sodium oleate 4 The preparation method of photocatalyst, specifically relate to with NH 4 VO 3 (ammonia metavanadate), Bi(NO 3 ) 3 ·5H 2 O (bismuth nitrate pentahydrate), SO (sodium oleate), etc. were used as reactants, and rod-shaped BiVO was prepared by hydrothermal reaction and surfactant sodium oleate 4 A photocatalyst and its photocatalytic application belong to the technical field of photocatalysis. Background technique [0002] With the improvement of industrialization and the rapid development of society, social productivity has made great progress, but environmental problems have gradually replaced food problems and become one of the most serious problems facing people in today's society. Among them, water pollution has made the problem of global water shortage more severe. Using photocatalytic technology to degrade water pollutan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/30B01J23/843C02F101/38C02F101/36C02F101/34
CPCB01J23/8437C02F1/30C02F1/32C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 仲蕾罗润孙建华牟志刚周萍
Owner JIANGSU UNIV OF TECH