Biochar-modified bismuth vanadate catalyst, preparation method and application thereof

Abstract

The invention discloses a preparation method of a biochar-modified bismuth vanadate catalyst, comprising the following steps: step 1, preparation of biochar: walnut shells are made into walnut shell biochar; step 2, biochar-modified bismuth vanadate Catalyst preparation: Dissolve a certain amount of P123 completely in concentrated nitric acid, then add ethanol, and add Bi(NO 3 )·5H 2 O and NH 4 VO 3 , adjust the pH value, stir for 0.5-2 hours, then transfer the mixture to an autoclave, heat it to 120°C in a blast drying oven and keep it for 12 hours, and after naturally cooling to room temperature, wash and dry the obtained yellow precipitate to obtain biochar Modified bismuth vanadate catalyst. The invention also provides a biochar modified bismuth vanadate catalyst and application thereof. The biochar-modified bismuth vanadate catalyst provided by the invention has low cost and more uniform particles, can effectively degrade sulfonamide in sulfonamide wastewater, and has strong practical value.

Description

technical field [0001] The invention relates to a catalyst, a preparation method and its application, in particular to a biochar-modified bismuth vanadate catalyst, a preparation method and its application in the treatment of sulfonamide wastewater. Background technique [0002] With the development of society and economy, environmental pollution has become one of the greatest threats faced by human beings. The excessive consumption of fossil fuels and the discharge of toxic chemicals lead to global warming and water pollution, which pose great challenges to human survival. In particular, the rapid development of industrialization has caused a large amount of pollutants such as dyes, heavy metals, pesticides and surfactants to be discharged, which has seriously affected the ecological environment and the survival of species. Only by adopting effective methods to solve the problems of pollution source discharge and pollutant control can human beings restrain the continuous g...

AI Technical Summary

Problems solved by technology

However, during the course of the study it was found that BiVO 4 There are serious defects: the small specific surface area and the rapid recombination of photogenerated carriers in the bulk phase lead to a very low quantum yield

[0006] 1. BiVO 4 The specific surface area is small, resulting in fewer active sites and poor activity in photocatalytic reactions;

[0007] 2. BiVO 4 The recombination probability of photogenerated charges is high, and the lifetime of photogenerated carriers is short, resulting in poor photocatalytic activity;

[0008] 3. BiVO 4 The utilization range of visible light is narrow;

[0009] 4. Commonly used carbons such as activated carbon, graphene, C 60 、C 70 etc. Due to its high price, its wide application is limited

Images