The invention discloses a carbon
nanodot-modified
bismuth tungstate photocatalyst and application thereof, belonging to the technical field of photocatalytic oxidation. A preparation method for the
bismuth tungstate photocatalyst comprises the following steps: preparing a
sodium tungstate precursor solution A from a
sodium tungstate dihydrate and deionized water, and preparing a
bismuth nitrate precursor solution B from
bismuth nitrate pentahydrate and dilute
nitric acid solution; mixing the precursor solution A with the precursor solution B, carrying out a
hydrothermal reaction at 100-250 DEGC, washing a precipitate with deionized water after completion of the reaction,
drying the precipitate, then calcining the precipitate at 400-520 DEG C, and performing
grinding to obtain bismuth tungstate
powder; dissolving an
ethylenediamine solution and a
citric acid monohydrate in deionized water to prepare a carbon
nanodot precursor solution, subjecting the carbon
nanodot precursor solution to a
hydrothermal reaction at 100-300 DEG C, carrying out filtering to obtain a carbon nanodot solution, dropwise adding the carbon nanodot solution into the bismuth tungstate
powder, and carrying outmixing,
drying and
grinding so as to obtain the carbon nanodot-modified bismuth tungstate photocatalyst. The carbon nanodot-modified bismuth tungstate photocatalyst has excellent ability of photocatalytic oxidation of organic pollutants, and can be used for photocatalytic oxidation of organic pollutants such as
rhodamine B and
phenol.