Three-dimensional particle electrode loaded with catalyst active carbon and preparation method thereof

A technology that supports catalysts and particle electrodes. It is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. It can solve the problems of low catalyst activity, large catalyst particle size and high price, and achieve no secondary pollution. The effect of high catalytic activity, low catalyst loss and high pollutant removal rate

Active Publication Date: 2014-03-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-dimensional particle electrode is an important part of the bipolar three-dimensional electrode reactor; the existing particle electrode is mainly based on the loaded γ-A1 2 o 3 , supported molecular sieves, supported ceramics, coated activated carbon, and activated carbon supported catalysts, but the above particle electrodes still have the following problems: (1) supported γ-A1 2 o 3 , the supported molecular sieve has a serious problem of catalyst loss, and due to its amphoteric characteristics, poor acid and alkali resistance, it is not suitable for use in strongly acidic and strongly alkaline wastewater; (2) The surface of the supported ceramic is covered by organic matter and stripping also cause serious loss of active components, and ceramics are expensive, which limits their popularization and application to a certain extent; (3) activated carbon has high specific surface area, cheap and easy to obtain, good chemical stability and adsorption performance, but the load (Mn, Fe, Zn, Ni, CeO 2 / Sb 2 o 3 , SnO 2 / Sb 2 o 3 ) Activated carbon three-dimensional particle electrodes still have problems such as low catalyst activity and catalyst loss. The main reasons are a) low activity of the catalyst itself; b) shortcomings such as large catalyst particle size, poor adhesion, and easy loss.

Method used

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  • Three-dimensional particle electrode loaded with catalyst active carbon and preparation method thereof
  • Three-dimensional particle electrode loaded with catalyst active carbon and preparation method thereof
  • Three-dimensional particle electrode loaded with catalyst active carbon and preparation method thereof

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Embodiment 1

[0020] The supported three-dimensional particle electrode of this embodiment is made of granular activated carbon and TiO doped with Sn and Sb on the granular activated carbon. 2 Composite catalyst; the TiO doped with Sn and Sb 2 The molar ratio of Sn to Ti in the composite catalyst is 0.005:1; the molar ratio of Sn to Sb is 10:1. The preparation method includes the following steps:

[0021] 1) Pretreatment of granular activated carbon: soak the granular activated carbon in deionized water for cleaning, determine that the conductivity of the cleaning water is consistent with deionized water, filter out the excess water, dry it in an oven at 100°C and cool to room temperature for later use;

[0022] 2) Catalyst preparation: weigh 5.7×10 -2 mol tetrabutyl titanate, 2.85×10 -4 mol SnCl 4 ·5H 2 O, 2.85×10 -5 mol SbCl 3 Dissolve in 40mL of absolute ethanol and stir quickly for 30min to prepare solution A. Weigh 5 mL of deionized water, and dissolve 1.5 mL of acetic acid in 40 mL of abso...

Embodiment 2

[0027] The supported three-dimensional particle electrode of this embodiment is made of granular activated carbon and TiO doped with Sn and Sb on the granular activated carbon. 2 Composite catalyst; the TiO doped with Sn and Sb 2 The molar ratio of Sn to Ti in the composite catalyst is 0.03:1; the molar ratio of Sn to Sb is 20:1. The preparation method includes the following steps:

[0028] 1) Pretreatment of granular activated carbon: soak the granular activated carbon in deionized water for cleaning, determine that the conductivity of the cleaning water is consistent with that of deionized water, filter out the excess water, dry it in an oven at 200°C and cool it to room temperature for later use;

[0029] 2) Catalyst preparation: weigh 5.7×10 -2 mol tetrabutyl titanate, 1.71×10 -3 mol of SnCl 4 ·5H 2 O, 8.55×10 -5 mol of SbCl 3 Dissolve in 40 mL of absolute ethanol, stir quickly for 30 minutes to prepare solution A; weigh 5 mL of deionized water, and dissolve 1.5 mL of acetic aci...

Embodiment 3

[0034] The supported three-dimensional particle electrode of this embodiment is made of granular activated carbon and TiO doped with Sn and Sb on the granular activated carbon. 2 Composite catalyst; the TiO doped with Sn and Sb 2 The molar ratio of Sn to Ti in the composite catalyst is 0.01:1; the molar ratio of Sn to Sb is 10:1.

[0035] The preparation method includes the following steps:

[0036] 1) Pretreatment of granular activated carbon: soak the granular activated carbon in deionized water to clean, measure the conductivity of the cleaning water to be consistent with deionized water, filter out the excess water and put it in an oven at 150℃ to dry and cool to room temperature for later use;

[0037] 2) Catalyst preparation: weigh 5.7×10 -2 mol tetrabutyl titanate, 5.7×10 -4 mol SnCl 4 ·5H 2 O, 5.7×10 -5 mol SbCl 3 Dissolve in 40mL of absolute ethanol and stir quickly for 30min to prepare solution A. Weigh 5 mL of deionized water, and dissolve 1.5 mL of acetic acid in 40 mL of...

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Abstract

The invention discloses a three-dimensional particle electrode loaded with catalyst active carbon and a preparation method thereof. The electrode consists of particle active carbon and a TiO2 solid solution compound catalyst which is loaded on the particle active carbon and is doped with Sn and Sb elements. The method comprises the steps of particle active carbon pretreatment, catalyst preparation, soaking for aging, drying and roasting for activating. The three-dimensional particle electrode loaded with the catalyst active carbon prepared with the method has the characteristics of high pollutant removing rate, high electrocatalytic activity, high yield of hydroxyl radicals, little loss of a catalyst and the like; moreover, the preparation method is simple, noble metal catalysts are not used, used raw materials are widely available, the manufacturing cost is low, and secondary pollution is avoided. When the three-dimensional particle electrode loaded with the catalyst active carbon prepared with the method is applied to a three-dimensional electrode reactor, non-biodegradable organic waste water can be treated efficiently.

Description

Technical field [0001] The invention relates to a three-dimensional particle electrode loaded with catalyst activated carbon and a preparation method thereof, which can be used as filling particles of a three-dimensional electrode reactor and used for the treatment of difficult-to-biodegradable organic wastewater, belonging to the field of electrochemical catalysis. Background technique [0002] In recent years, bipolar three-dimensional electrode reactors have received extensive attention. Since there is no separation material between the anode and the cathode in the reactor, the three-dimensional particle electrode is filled between the anode and the cathode, and the particles have two electrical polarities under the action of an electric field. Each three-dimensional particle electrode forms a micro electrochemical oxidation system. Therefore, the bipolar reactor is more suitable for irreversible oxidation reactions, and therefore has the following characteristics: (1) It has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/30
Inventor 汪诚文李新洋朱维
Owner TSINGHUA UNIV
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