Method for preparing micron-sized TiO2/AC catalyst

A micron-scale catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult to meet the requirements of photocatalytic degradation reaction, difficult to separate particles, low quantum yield, etc. Achieve the effects of delaying hydrolysis-polycondensation reaction, simplifying the preparation process, and high load firmness

Inactive Publication Date: 2018-01-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to nanoscale TiO 2 Particles are difficult to separate from aqueous media, which limits the size of nano-sized TiO 2 Application of Catalyst in Practical Water Treatment Process
Micron-sized large particle size TiO 2 Easy to separate from aqueous media, but difficult to meet the requirements of photocatalytic degradation reaction due to low quantum yield

Method used

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  • Method for preparing micron-sized TiO2/AC catalyst

Examples

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preparation example Construction

[0019] Such as figure 1 Said, the micron TiO of the present invention 2 The preparation method of catalyst comprises the following steps:

[0020] (1) Pretreatment of activated carbon

[0021] Take a certain amount of granular activated carbon and put it into 80°C pure water, stir and heat it for 30min, after filtering, put it into 30% nitric acid solution, mix it well for 30min, let it stand for 24h, filter and wash it with pure water until it becomes neutral, and bake it at 80°C Dry. After the activated carbon is cooled, it is pulverized with a sample preparation pulverizer for 2 minutes, ball milled at a ball milling speed of 270 r / min for 135 minutes, and placed in a desiccator for later use.

[0022] (2) Micron TiO 2 / AC catalyst preparation process

[0023] Preparation raw materials: activated carbon, butyl phthalate, absolute ethanol, glacial acetic acid, hydrochloric acid, pure water

[0024] Fully mix 10ml of butyl phthalate and 10ml of absolute ethanol in a sep...

Embodiment 1

[0027] Example 1 The calcination temperature is 300°C Micron TiO 2 / AC catalyst preparation.

[0028] Dissolve 10 mL of tetrabutyl titanate in 10 mL of absolute ethanol, stir for 10 minutes, and record it as liquid A; dissolve 1.5 mL of pure water, 1 mL of glacial acetic acid, and 1 mL of 0.1 mol / L hydrochloric acid-ethanol mixture in 6.5 mL of absolute ethanol , stirred for 10 min, and recorded as liquid B; poured 5.48 g of ball-milled activated carbon into 20 mL of 0.1 mol / L hydrochloric acid ethanol, stirred for 30 min, and recorded as liquid C. Place liquid C on a magnetic stirrer and stir vigorously. At the same time, liquid A and liquid B are added dropwise to liquid C at a speed of 60 drops / min and 15 drops / min respectively. After adding liquid A for 2 minutes, add liquid B dropwise. During the dropwise addition, the butyl phthalate hydrolysis system was ultrasonically treated to form a sol. Continue to stir for 2 hours after the dropwise addition, and age for 24 hour...

Embodiment 2

[0029] Example 2 The calcination temperature is 400°C Micron TiO 2 / AC catalyst preparation.

[0030] Dissolve 10 mL of tetrabutyl titanate in 10 mL of absolute ethanol, stir for 10 minutes, and record it as liquid A; dissolve 1.5 mL of pure water, 1 mL of glacial acetic acid, and 1 mL of 0.1 mol / L hydrochloric acid-ethanol mixture in 6.5 mL of absolute ethanol , stirred for 10 min, and recorded as liquid B; poured 5.48 g of ball-milled activated carbon into 20 mL of 0.1 mol / L hydrochloric acid ethanol, stirred for 30 min, and recorded as liquid C. Place liquid C on a magnetic stirrer and stir vigorously. At the same time, liquid A and liquid B are added dropwise to liquid C at a speed of 60 drops / min and 15 drops / min respectively. After adding liquid A for 2 minutes, add liquid B dropwise. During the dropwise addition, the butyl phthalate hydrolysis system was ultrasonically treated to form a sol. Continue to stir for 2 hours after the dropwise addition, and age for 24 hour...

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Abstract

The invention provides a method for preparing a micron-sized TiO2/AC catalyst. The preparation method comprises the following steps: pretreating activated carbon, preparing a buffer solution, and preparing the micron-sized TiO2/AC catalyst. According to the method disclosed by the invention, micron-sized activated carbon serves as a carrier, TiO2 nanocrystals are produced in situ in the activatedcarbon channel by virtue of a sol-gel method, and the mass ratio is 30%. The activated carbon carrier is coupled with the TiO2 nanocrystals so as to prepare the high-activity micron-sized TiO2/AC catalyst. The dispersity of nano TiO2 powder in an aqueous medium is improved, the TiO2 powder is easy to separate and recover, and the photocatalytic activity of the TiO2 is effectively improved. The TiO2 is filtered and recovered by adopting a PVDF (Polyvinylidene Fluoride) microfiltration membrane, and the recovery rate reaches 100%.

Description

technical field [0001] The invention relates to inorganic functional materials and fine chemical preparation technology, and is a kind of micron TiO 2 / AC catalyst preparation method. Background technique [0002] Photocatalytic technology is an emerging green water treatment technology. It has outstanding advantages such as mild reaction conditions, the ability to mineralize most organic matter and eliminate heavy metal ion pollution. It has become an effective method for treating refractory wastewater. Among many semiconductor oxides, TiO 2 Because of its high efficiency, non-toxic, stable chemical properties, etc., it has unique advantages in the treatment of refractory organic matter mineralization and removal of heavy metal ion toxicity, and is a promising water treatment technology. [0003] Nano-sized TiO 2 The catalyst has the characteristics of quantum size effect and quantum tunneling effect, and has high photon quantum efficiency and photocatalytic activity. D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C02F1/32
Inventor 解立平王蒙莎莉于子均李昌浩李欣欣
Owner TIANJIN POLYTECHNIC UNIV
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