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Activated carbon loaded titanium dioxide composite photocatalyst and preparation method thereof

A technology of titanium dioxide and activated carbon, which is applied in the field of activated carbon-supported titanium dioxide composite photocatalyst and its preparation, can solve the problems of poor reusability, low reaction rate, easy powder agglomeration, etc., achieve good sterilization, simple preparation method, and reduce production cost effect

Inactive Publication Date: 2014-11-26
BAOSTEEL DEV CO LTD
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AI Technical Summary

Problems solved by technology

[0005] However, TiO 2 Photocatalytic activity can only be exhibited under the excitation of ultraviolet light, and the reaction rate is relatively low, and the nano-TiO used in the prior art 2 Powder suspension system, there are problems that the powder is easy to agglomerate, difficult to recycle and poor in reusability

Method used

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  • Activated carbon loaded titanium dioxide composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Pretreatment of activated carbon carrier

[0026] First, add a certain amount of activated carbon carrier into distilled water and stir evenly for 5 minutes, then place it in an ultrasonic cleaner for 30 minutes; then put the activated carbon carrier into a HCl solution with a concentration of 0.1mol / L, mix it thoroughly for 30 minutes, and let it stand for 24 hours , filtered and washed with distilled water until neutral. The activated carbon was baked in an oven at 80°C for 2 hours, cooled and then used for later use. The main purpose of this step is to clean the activated carbon carrier.

[0027] (2) TiO loaded on activated carbon 2 Preparation of photocatalyst precursors

[0028] Dissolve 5 mL of n-tetrabutyl titanate in 34 mL of absolute ethanol, add 2 mL of glacial acetic acid after stirring, add 0.45 g of activated carbon in step (1), and soak for 4 hours; slowly add 2 mL of deionized water to the mixture under vigorous stirring , adjust the pH value to 2...

Embodiment 2

[0035] (1) The pretreatment process of activated carbon carrier is the same as embodiment 1.

[0036] (2) TiO loaded on activated carbon 2 Preparation of photocatalyst precursors

[0037] Dissolve 3 mL of n-tetrabutyl titanate in 34 mL of absolute ethanol, add 2 mL of glacial acetic acid after stirring, add 0.27 g of activated carbon in step (1), and soak for 5 hours; slowly add 2 mL of deionized water to the mixture under vigorous stirring , adjust the pH value to 2 with 1mol / L nitric acid, and stir for 10 hours to obtain activated carbon-supported TiO 2 Precursors of photocatalysts;

[0038] (3) The preparation process of activated carbon-supported titanium dioxide composite photocatalyst is the same as that in Example 1.

[0039] Test Results:

[0040] The detection process is the same as in Example 1, adding 1g / L of granular activated carbon loaded TiO in the water sample to be tested 2 After the photocatalyst, the inactivation rate of Escherichia coli was greatly aff...

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Abstract

The invention belongs to the technical field of bacterium-containing wastewater, and particularly relates to an activated carbon loaded titanium dioxide composite photocatalyst and a preparation method thereof. The preparation method comprises the steps of adding activated carbon in distilled water; stirring for 3-8 minutes; cleaning for 20-40 minutes with ultrasonic waves; then adding activated carbon in an HCl solution; stirring for 20-40 minutes; standing; filtering; and washing to a neutral state; baking activated carbon for 1-3 hours; cooling; dissolving tetra-n-butyl titanate in absolute ethyl alcohol; stirring; adding glacial acetic acid and activated carbon; impregnating for 4-6 hours; adding deionized water into the mixed solution; adjusting a pH value to 1-3; stirring for 8-20 hours; drying for 2-3 hours at a temperature of 6-575 DEG C; and calcining for 2-3 hours at a temperature of 300-700 DEG C. The photocatalyst has high porosity, good sterilization property and high recovery rate, can be separated easily, can be used repeatedly, and reduces production cost of water treatment. The method is in no need of protection of an inert gas, and is simple and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of bacteria-containing wastewater treatment, in particular to an active carbon-loaded titanium dioxide composite photocatalyst and a preparation method thereof. Background technique [0002] With the intensification of environmental pollution, environmental protection and sustainable development have become the consensus of contemporary people, and the scarcity of water resources has made urban sewage recycling a hot spot today. After the secondary treatment of urban sewage, the water quality has been improved. The absolute number of bacteria carried is still considerable, and there may be pathogenic bacteria. These microorganisms must be removed before the wastewater can be safely discharged into the water body or recycled. With the continuous improvement of residents' quality of life requirements, the impact of secondary treatment effluent from sewage treatment plants on urban water bodies has aroused more...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J32/00B01J35/00C02F1/30
Inventor 吴立俊陆泉宝肖海彦丁宏
Owner BAOSTEEL DEV CO LTD
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