Pucherite-stannic oxide complex photocatalyst as well as preparation method and application thereof

Abstract

The invention discloses a pucherite-stannic oxide complex photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving tin chloride and bismuth nitrate in a nitric acid solution, fully stirring, and then preparing the solution into an acid mixed solution; dissolving ammonium metavanadate in a sodium hydroxide solution, fully stirring, and preparing an alkaline sodium vanadate solution; (2) under the stirring condition, dropwise adding the mixed solution into the sodium vanadate solution, so that a luminous yellow solution is generated; (3) dropwise adding an alkaline solution into the luminous yellow solution, adjusting the PH value to be above 8, performing supersonic vibration, and performing hydrothermal reaction on the mixed solution; (4) when a hydrothermal product is cooled to room temperature, cleaning by using deionized water, filtering, and drying, so that obtained powder is the pucherite-stannic oxide complex photocatalyst. The preparation method is simple, the cost is low, the repeatability is good, and the mass production requirement can be well met; the prepared photocatalyst can perform photocatalytic degradation on methyl blue under visible light.

Description

technical field [0001] The invention relates to the field of inorganic nano photocatalyst materials, in particular to a composite photocatalyst and a preparation method thereof. Background technique [0002] In the past few decades, photocatalytic technology has been widely used in the field of degradation of toxic organic pollutants and photolysis of water to generate hydrogen energy. TiO 2 Because of its high chemical stability, low cost, and non-toxicity, it has become the most widely used semiconductor material. However, TiO 2 However, it is limited in practical applications because TiO 2 The band gap energy is 3.2eV, which means that TiO 2 Only ultraviolet light can be utilized, and ultraviolet light only accounts for 4% in the solar emission spectrum, and the remaining other solar spectrum cannot be fully utilized. Therefore, in recent years, many scholars have devoted themselves to the development of catalyst materials driven by visible light in order to fully an...

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Problems solved by technology

[0004] The problem to be solved by the present invention is that the traditional bismuth vanadate monomer catalyst has defects such as too small specific surface area, poor adsorption capacity, and difficult separation of photogenerated carriers, and easy recombination of electron-hole pairs. Based on the photocatalytic performance of bismuth, a tin oxide nanoparticle-modified bismuth vanadate composite photocatalyst capable of promoting efficient charge separation and high photocatalytic activity and its preparation method have been constructed. In the composite photocatalyst, tin oxide nanoparticles are discretely compounded on The surface of bismuth vanadate is conducive to exposing the highly active tin oxide-bismuth vanadate phase interface, and has broad application prospects in the fields of environmental pollution control, energy, etc.; at the same time, the preparation method of the composite photocatalyst is simple, low in cost, and repeatable. Good performance, can well meet the requirements of mass production

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