Nano- floating type supported photocatalyst, low-temperature preparation method and uses thereof

Abstract

The invention discloses a nanometer floating type supported photocatalyst and a low-temperature preparation and application method thereof. The preparation method comprises the following steps of: firstly mixing the alcohol solution of butyl titanate and censphere floating beads sufficiently and evenly, loading the butyl titanate onto the censphere floating beads through a rotary evaporation method, and carrying out the outphase hydrolysis reaction of the censphere floating beads loaded with the butyl titanate to form Tio2 floating beads containing water; and then mixing the Tio2 floating beads containing water with water, cooling down, filtering, cleaning, drying the mixture in the vacuum after a crystallization reaction, and obtaining the photocatalyst. The invention can not only obtain the high-activity photocatalyst at a low temperature, but also avoid the high-temperature after-treatment step of the floating type supported photocatalyst, thereby effectively reducing the energy sources consumed in the preparation process, simultaneously avoiding the sloughing of the carrier and the agglomeration of the catalyst during the subsequent high-temperature sintering process of the supported catalyst, and realizing the degradation of organic pollutants such as oil floating on the water surface through the photocatalyst with high efficiency.

Description

technical field [0001] The invention belongs to the field of photocatalyst materials, and in particular relates to a nano-floating loaded photocatalyst, a low-temperature preparation method thereof, and an application in the environment. Background technique [0002] In recent years, the use of semiconductor powder as a photocatalyst to degrade various organic pollutants has attracted the attention of scholars in different fields at home and abroad. TiO 2 The representative semiconductor photocatalysis technology has become one of the most active research fields in the environment and other fields. However, photocatalytic technology has not been used on a large scale in wastewater treatment technology. One of the main problems in engineering applications is that the powder catalyst in the suspension system is difficult to separate and recover, and the nano-powder photocatalyst is prone to aggregation, which makes the photocatalytic effect worse. The study found that immobi...

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Problems solved by technology

However, they all used high-temperature calcination methods in the process of preparing photocatalysts. During the calcination process, the porous or hollow structure of the carrier may be damaged to a certain extent, which will affect the floating performance of the photocatalyst. TiO 2 The distribution is not uniform enough, and the particle size range is easy to widen, thus affecting the activity of the photocatalyst

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