Preparation and application of hollow tree-like bismuth oxide-bismuth sulfide complex

Abstract

The invention provides a preparation method of a hollow tree-like bismuth oxide-bismuth sulfide complex. The preparation method comprises the following steps: (1) taking bismuth nitrate pentahydrate, stirring and dissolving in dilute nitric acid, and then regulating the pH value of a bismuth nitrate solution to 9-14 with a fixed quantity of alkaline solution; then transferring the solution into a crystallization reaction kettle, reacting at the temperature of 80-200 DEG C for 0.5-12h, cooling, filtering, separating, washing with deionized water, washing with anhydrous ethanol, drying and calcining to obtain hollow tubular bismuth oxide; and (2) dispersing the prepared hollow tubular bismuth oxide in the deionized water, adding a water-soluble sulfide while stirring, controlling the molar ratio of the bismuth oxide to the sulfide to be 1: (1-8), then transferring the obtained solution into the crystallization reaction kettle, reacting at 40-180 DEG C for 0.5-36h, cooling, filtering, separating, washing with the deionized water for three times, washing with the anhydrous ethanol and drying to obtain the hollow tree-like bismuth oxide-bismuth sulfide complex. The invention further relates to an application of the hollow tree-like bismuth oxide-bismuth sulfide complex as a photocatalyst.

Description

[Technical field] [0001] The invention relates to the field of catalysts, in particular to the preparation and application of a hollow dendritic bismuth oxide-bismuth sulfide photocatalyst. [Background technique] [0002] With the development of society, the problem of energy shortage and environmental pollution has been paid more and more attention. Solving these two problems is an urgent need to achieve sustainable development. Solar energy is a kind of clean, inexhaustible energy source, so the full utilization of solar energy is considered to be one of the most likely ways to solve these two problems. Photocatalytic materials have important application prospects in the use of sunlight to photolyze water to produce hydrogen and eliminate organic pollutants. Traditional photocatalytic material TiO 2 Because of its wide band gap, it can only absorb ultraviolet light in sunlight, and its utilization efficiency of sunlight is low. In recent years, BiWO 6 , Bi 2 o 3 , Bi...

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Problems solved by technology

[0005] However, the method of synthesizing these special morphology monoclinic bismuth oxides usually requires the introduction of organic solvents, surfactants, organic structure-directing agents, etc., because the introduction of these organic substances not only increases the difficulty of the post-processing process and pollutes the environment, but also Organic intermediates that are more toxic and harmful than these organics are more likely to be produced during material synthesis

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