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Preparation and application of Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode

A high catalytic activity, sb-ni-nd technology, applied in the field of preparation, microporous anode, tin dioxide microporous anode, can solve the problem of less multi-element co-doping, achieve large specific surface area, improve catalytic activity and Mechanical stability, simple and efficient method

Active Publication Date: 2014-09-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years doped SnO 2 A series of studies have been done on the electrode, including the doping of Fe, Co, Pd, Ru and other metals, and some scholars have done the doping of rare earth elements such as La, Ce, Gd, etc., so that the catalytic activity or service life of the electrode has been improved to a certain extent. , but there are still few studies on multi-element co-doping, especially for the co-doping of transition metal Ni and rare earth elements Nd, etc., there is no report

Method used

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  • Preparation and application of Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode
  • Preparation and application of Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode
  • Preparation and application of Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Pretreatment of mp-Ti substrate: soak the mp-Ti board in 40% NaOH at 80°C for 2 hours to remove oil, wash it with distilled water until neutral; soak it in 15% oxalic acid solution, and keep it at 98°C for 2 hours , let cool at room temperature, rinse with double distilled water and set aside.

[0028] 2. Fully mix citric acid and ethylene glycol, and stir at 55°C to 65°C until completely dissolved. After the sol is initially formed, continue to stir at 85°C to 95°C for 30 minutes to obtain a stable sol.

[0029]3. Add an appropriate amount of SnCl to the sol prepared in 2. 4 ·5H 2 O and SbCl 3 , stir evenly, and then add an appropriate amount of NiSO 4 ·6H 2 O and NdCl 3 ·6H 2 O. After fully stirring and mixing, place at 85°C to 95°C for 30 minutes to obtain a stable and uniform sol, which is ready for use. Wherein the molar ratio of Sn:Sb:Ni:Nd is (650~670):200:100:6.5:1:0.5.

[0030] 4. Using the dipping-coating method, dip the mp-Ti plate pretreated in st...

Embodiment 2

[0033] Embodiment 2: (Sn:Sb:Ni:Nd molar ratio is 100:6.5:1:1, other conditions are the same as embodiment 1)

[0034] 1. Pretreatment of mp-Ti substrate: soak the mp-Ti board in 40% NaOH at 80°C for 2 hours to remove oil, wash it with distilled water until neutral; soak it in 15% oxalic acid solution, and keep it at 98°C for 2 hours , let cool at room temperature, rinse with double distilled water and set aside.

[0035] 2. Fully mix citric acid and ethylene glycol, and stir at 55°C to 65°C until completely dissolved. After the sol is initially formed, continue to stir at 85°C to 95°C for 30 minutes to obtain a stable sol.

[0036] 3. Add an appropriate amount of SnCl to the sol prepared in 2. 4 ·5H 2 O and SbCl 3 , stir evenly, and then add an appropriate amount of NiSO 4 ·6H 2 O and NdCl 3 ·6H 2 O. After fully stirring and mixing, place at 85°C to 95°C for 30 minutes to obtain a stable and uniform sol, which is ready for use. Wherein the molar ratio of Sn:Sb:Ni:Nd is...

Embodiment 3

[0040] Embodiment 3: (Sn:Sb:Ni molar ratio is 100:6.5:1, other conditions are the same as embodiment 1)

[0041] 1. Pretreatment of mp-Ti substrate: soak the mp-Ti board in 40% NaOH at 80°C for 2 hours to remove oil, wash it with distilled water until neutral; soak it in 15% oxalic acid solution, and keep it at 98°C for 2 hours , let cool at room temperature, rinse with double distilled water and set aside.

[0042] 2. Fully mix citric acid and ethylene glycol, and stir at 55°C to 65°C until completely dissolved. After the sol is initially formed, continue to stir at 85°C to 95°C for 30 minutes to obtain a stable sol.

[0043] 3. Add an appropriate amount of SnCl to the sol prepared in 2. 4 ·5H 2 O and SbCl 3 , stir evenly, and then add an appropriate amount of NiSO 4 ·6H 2 O. After fully stirring and mixing, place at 85°C to 95°C for 30 minutes to obtain a stable and uniform sol, which is ready for use. Wherein the molar ratio of Sn:Sb:Ni is 100:6.5:1.

[0044] 4. Usin...

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Abstract

The invention discloses preparation and application of a Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode, and belongs to the technical field of electrochemical water treatment. A micropore titanium (mp-Ti) plate is used as a matrix, and a SnO2-Sb-Ni-Nd composite oxide coating is immobilized on the mp-Ti plate. (1) A modified sol using citric acid and ethylene glycol as matrixes and containing SnCl4, SbCl3, NiSO4 and NdCl3 is prepared; (2) after pretreatment of the mp-Ti plate, the mp-Ti plate is impregnated in the modified sol of the step (1), brushed and dried, then is calcined at high temperature, finally is rinsed with water, and dried for stand-by use. The Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode is used for electrocatalytic oxidation of phenol which is a pollutant difficult to biodegrade in water, results show that the remove phenol ability is strong, and the organic matter mineralization rate is significantly higher than that of electrodes in the prior art. The prepred Sb-Ni-Nd co-doping SnO2 high catalytic activity electrode is high in catalytic activity and good in stability, and has a good industrial application prospect.

Description

technical field [0001] The invention relates to a microporous anode, in particular to an antimony-nickel-neodymium (Sb-Ni-Nd) co-doped tin dioxide microporous anode, a preparation method and an application. A tin dioxide anode co-doped with metal nickel (Ni) and rare earth neodymium (Nd) was prepared on the basis of doping antimony (Sb) by a modified sol-gel method for the oxidative degradation of refractory organic compounds such as phenol The invention greatly improves the catalytic activity of the electrode and belongs to the technical field of electrochemical water treatment. Background technique [0002] Phenol is an important organic chemical raw material. It can be used to prepare chemical products and intermediates such as phenolic resin and caprolactam. important purpose. In addition, phenol can also be used as a solvent, experimental reagent and disinfectant. At present, the consumption of phenol in my country has reached 2 million tons. With the rapid developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467B01J23/843
Inventor 孙治荣张欢魏学锋
Owner BEIJING UNIV OF TECH
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