Electrochemically modified bismuth vanadate-molybdenum sulfide-cobaltosic oxide catalytic electrode, as well as preparation method and application thereof

Abstract

The invention relates to the technical field of wastewater treatment and photoelectric catalytic materials, and discloses an electrochemically modified bismuth vanadate-molybdenum sulfide-cobaltosic oxide catalytic electrode, as well as a preparation method and application thereof. The preparation method comprises the following steps: dispensing a Bi<3+> precursor solution on a conductive substrate, drying and calcining to obtain a BiVO4 pre-substrate film electrode; putting the BiVO4 pre-substrate film electrode in a BiVO4 seed solution, performing hydrothermal reaction, and calcining to obtain a BiVO4 film electrode; electrodepositing the BiVO4 film electrode by using MoS2 precursor solution as a deposition solution and BiVO4 film electrode as a work electrode, and calcining to obtain aBiVO4-MoS2-Co3O4 photoelectric catalytic film electrode; and electrochemically modifying by using a potassium borate solution as a modifying solution and the BiVO4-MoS2-Co3O4 photoelectric catalytic film electrode as a work electrode. The catalytic electrode has relatively high photo-induced electron and hole separation efficiency, and has excellent photoelectric catalytic activity.

Description

technical field [0001] The invention relates to the technical fields of wastewater treatment and photoelectric catalysis materials, in particular to an electrochemically modified bismuth vanadate-molybdenum sulfide-cobalt tetraoxide catalytic electrode and its preparation method and application. Background technique [0002] Bisphenol A (2,2-bis-p-phenolpropane, BPA), as one of the most produced organic chemicals, has been widely used in the polymer industry. BPA is ubiquitous in the environment and has been detected in landfill leachate, air, dust and water. [0003] BPA is a synthetic chemical substance used in glass, plastic, epoxy resin and other manufacturing industries. It is widely used in various ordinary consumer products and brings many conveniences to the modern life of human beings. However, bisphenol A is a chemical substance that can interfere with endocrine through various physiological organisms, and may affect the normal growth of various biological organis...

AI Technical Summary

Problems solved by technology

Traditional treatment methods for bisphenol A organic wastewater include biological methods, adsorption methods, and strong oxidant methods. Traditional treatment methods are usually limited, such as slow process, secondary pollution, and high cost.

The biodegradation method has low treatment costs, large treatment capacity, and complete degradation, but screening and breeding is more troublesome, and the treatment process is greatly affected by environmental factors, and the treatment time is relatively long

The cost of degrading bisphenol A by adsorption method is relatively high, and it is difficult to reuse. The adsorbed substances need to be further processed and may cause secondary pollution

Strong oxidation method Traditional chemical treatment of bisphenol A will not only cause a huge economic burden due to the addition of a large amount of chemical reagents, but also increase its environmental hormone effect and toxicity because of the incomplete oxidation and degradation of bisphenol A

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