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BiVO4/InVO4 heterojunction catalyst as well as preparation method and application of BiVO4/InVO4 heterojunction catalyst

A kind of heterojunction and catalyst technology, applied in the field of photocatalysis, to achieve the effect of accelerated separation, easy morphology, and improved catalytic activity

Inactive Publication Date: 2018-07-27
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The object of the present invention is to provide a kind of BiVO 4 / InVO 4 Heterojunction photocatalyst preparation technology and its photocatalytic application

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  • BiVO4/InVO4 heterojunction catalyst as well as preparation method and application of BiVO4/InVO4 heterojunction catalyst
  • BiVO4/InVO4 heterojunction catalyst as well as preparation method and application of BiVO4/InVO4 heterojunction catalyst
  • BiVO4/InVO4 heterojunction catalyst as well as preparation method and application of BiVO4/InVO4 heterojunction catalyst

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Embodiment 1

[0048] BiVO 4 / InVO 4 Preparation method of heterojunction photocatalyst:

[0049] (1) Liquid vanadium source VOC 2 o 4 Preparation: Dissolve oxalic acid in distilled water with stirring, and slowly add V in a water bath at 80°C 2 o 5 Stir the powder for 2 hours until the aqueous solution becomes transparent and blue to obtain 0.2mol / L liquid vanadium source VOC 2 o 4 stand-by;

[0050] (2) BiVO 4 / InVO 4 The preparation of the heterojunction catalyst: 6.4mmolBi(NO 3 ) 3 3.5H 2 O and 1.6mmolIn(NO 3 ) 3 4.5H 2 O is dissolved in excess nitric acid; Subsequently, take the liquid vanadium source VOC in 8mmol step (1) 2 o 4 , was added dropwise to the above solution with stirring, and then 25wt% NH 3 ·H 2 O and 2mol / L HNO 3 Adjust the pH value of the solution to 7.0, transfer the suspension to an autoclave after adjustment, and perform hydrothermal treatment at 150°C for 24 hours. After the reactor is cooled, collect the product and wash it several times, and dry...

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Abstract

The invention belongs to the field of photocatalysis and specifically relates to a BiVO4 / InVO4 heterojunction catalyst as well as a preparation method and application of the BiVO4 / InVO4 heterojunctioncatalyst. The BiVO4 / InVO4 heterojunction catalyst is prepared to be 5mu m by hydrothermally synthesizing a liquid vanadium source VOC2O4, Bi(NO3)3.3.5H2O and In(NO3)3.4.5H2O by using a one-step method, the inner part of the BiVO4 / InVO4 heterojunction catalyst is an agglomerated flower sphere, and the outer part of the BiVO4 / InVO4 heterojunction catalyst is a spheroid. By using the product disclosed by the invention, the sterilization rate of Escherichia coli, staphylococcus aureus and pseudoalteromonas reaches 99% or above, and the degradation rate of Rhodamine B reaches 99.875%. At present,the compound is synthesized in a laboratory, in addition, the preparation method is simple in preparation, easy to control, low in cost, a visible-light response BiVO4 / InVO4 heterojunction material iseffectively formed, and the composite ratio of photoelectron-hole pairs is increased. The photocatalyst disclosed by the invention is small in usage amount, low in toxicity, high in efficiency, longin lasting effect time, recyclable, capable of effectively killing bacteria and degrading a dye and wide in application prospect in the field of water body purification.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a BiVO 4 / InVO 4 Heterojunction catalyst and its preparation method and application. Background technique [0002] With the development of marine exploration, more and more attention has been paid to the problem of marine biological pollution in the world, causing huge economic losses and serious marine safety incidents [1] . Antifouling coating is one of the most effective application of surface technology to reduce the hazard of biofouling, but due to its high biotoxicity, this technology induces serious drug resistance [2] Furthermore, resistance to antibiotics and other antimicrobial materials has reached dangerous levels that render existing antimicrobial drugs ineffective. Therefore, environmentally friendly antifouling materials must be developed to replace toxic substances. [0003] In recent years, new green photocatalytic technologies based on semiconductors have rece...

Claims

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Application Information

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IPC IPC(8): B01J23/22C02F1/30C02F1/50A01N59/16C02F101/34C02F101/36C02F101/38A01P3/00
CPCA01N59/16C02F1/30C02F1/50B01J23/002B01J23/22C02F2305/10C02F2101/38C02F2101/34C02F2101/36B01J2523/00B01J35/39B01J2523/33B01J2523/55B01J2523/54
Inventor 张鑫张杰侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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