Preparation method for carbon nanotube-nano-bismuth vanadate composite photocatalyst

Abstract

The present invention relates to a preparation method for a carbon nanotube-nano-bismuth vanadate composite photocatalyst. The method comprises: (1) adding a bismuth salt and a stabilizing agent to a phosphate buffer solution, stirring to form a suspension, dissolving metavanadate in the phosphate buffer solution, adding to the suspension, and stirring to form a transparent solution; (2) adopting an alkaline solution to adjust the pH value of the transparent solution to 6.0-8.0, adding carbon nanotubes while maintaining a temperature to 40-100 DEG C, stirring until uniformly mixing, centrifugating, filtering, washing, placing into a muffle furnace to carry out baking, and finally cooling and grinding to obtain the finished product. The preparation method of the present invention has characteristics of simpleness, easy performance, low requirements on equipment, and good operability. The prepared carbon nanotube powder bismuth vanadate is uniformly distributed, the persistent toxic substances can be efficiently degraded under the ultraviolet light condition and the visible light condition with the prepared carbon nanotube powder bismuth vanadate, the prepared carbon nanotube powder bismuth vanadate is convenient to use, and can be recovered and regenerated.

Description

technical field

[0001] The invention belongs to the field of preparation of nano bismuth vanadate composite photocatalyst, in particular to a preparation method of carbon nanotube-nano bismuth vanadate composite photocatalyst. Background technique

[0002] In recent years, titanium dioxide (TiO 2 ) as the core representative of photocatalytic technology in the field of environmental pollution control, especially in the treatment of refractory biodegradable wastewater and air purification is more and more widely used, but because of its wide band gap, it can only be effective under the irradiation of ultraviolet light Photocatalysis, thus limiting the further expansion of its application field. In order to be able to increase the TiO 2 For the utilization efficiency of sunlight, many experts and scholars at home and abroad focus on TiO2 which responds to visible light. 2 A lot of research work has been carried out on photocatalysts, mainly for TiO 2 Photocatalyst surface ...