mo-eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and its application

Abstract

The invention discloses a Mo-Eu co-doped titanium dioxide / aluminum phosphate molecular sieve composite photocatalyst. The aluminum phosphate molecular sieve is used as a carrier, and the Mo-Eu co-doped titanium dioxide nano-microsphere is used as an active component. The preparation method includes the following steps. : prepare the nano-microsphere active ingredient of Mo-Eu co-doped titanium dioxide; mix ionic liquid, phosphoric acid, aluminum source, organic amine, and hydrofluoric acid evenly; mix the Mo-Eu co-doped titanium dioxide nano-microsphere prepared in step S1 The spherical active ingredient is added to the mixed solution in step S2, and the mass fraction ratio of each substance in the mixture is: ionic liquid: phosphoric acid: aluminum source: organic amine: hydrofluoric acid: Mo-Eu co-doped titanium dioxide nano-microsphere activity Composition=10‑12:2‑3:1:5‑6:0.5‑0.8:0.3‑0.5; the mixture was crystallized at 350‑400℃ for 30‑50min; centrifuged, washed, dried, and calcined. The Mo-Eu co-doped titanium dioxide / aluminum phosphate molecular sieve composite photocatalyst provided by the invention can efficiently degrade the pollutants of printing and dyeing wastewater under the action of visible light, and the catalyst usage amount is small.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a Mo-Eu co-doped titanium dioxide / aluminum phosphate molecular sieve composite photocatalyst and applications thereof. Background technique [0002] my country is the largest country in the production and consumption of dyestuffs in the world, and the pollution of printing and dyeing wastewater is large and difficult to control. According to incomplete statistics, my country's printing and dyeing enterprises discharge 3-4 million tons of waste water every day. During the printing and dyeing process, the loss of dyes reaches 10-20%, of which at least half flows into the environment. At present, the treatment rate of dye waste water is less than 30%. %, of which the qualified rate is less than 60%. Because printing and dyeing wastewater has high chroma, high concentration of organic pollutants (especially refractory organic pollutants), high alkalinity, high water volume, large c...

AI Technical Summary

Problems solved by technology

According to incomplete statistics, my country's printing and dyeing enterprises discharge 3-4 million tons of wastewater every day. During the printing and dyeing process, the loss of dyes reaches 10-20%, at least half of which flow into the environment. The current treatment rate of dye wastewater is less than 30% %, of which the passing rate is less than 60%

However, TiO 2 The high recombination rate of photogenerated carriers, narrow spectral response range and poor adsorption capacity are the constraints of TiO 2 The main bottleneck of photocatalyst activity

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