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Graphite phase carbon nitride modified antimony doped tin dioxide composite photoelectric catalysis electrode and preparation method and applications thereof

A technology of graphite phase carbon nitride and tin dioxide, applied in chemical instruments and methods, oxidized water/sewage treatment, light water/sewage treatment, etc., can solve the problem of low photocatalytic efficiency of antimony-doped tin dioxide electrode

Pending Publication Date: 2019-05-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the low photocatalytic efficiency of the antimony-doped tin dioxide electrode in the prior art, the present invention provides a composite photocatalytic electrode with the ability of photoelectric synergistic catalytic degradation of persistent refractory organic waste water, its preparation method and application

Method used

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  • Graphite phase carbon nitride modified antimony doped tin dioxide composite photoelectric catalysis electrode and preparation method and applications thereof
  • Graphite phase carbon nitride modified antimony doped tin dioxide composite photoelectric catalysis electrode and preparation method and applications thereof
  • Graphite phase carbon nitride modified antimony doped tin dioxide composite photoelectric catalysis electrode and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this example, the preparation method of the antimony-doped tin dioxide photoelectrocatalytic composite electrode modified by graphite phase carbon nitride is as follows:

[0033] The titanium plate was cut into a size of 2.0cm×2.0cm, polished with 400-mesh, 800-mesh, and 1200-mesh sandpaper in sequence, and degreased in 10wt% sodium hydroxide solution for 1h; then heated and etched in 10wt% oxalic acid solution for 2h; finally Rinse well and store in ultrapure water for later use.

[0034] Weigh 20g of melamine in a crucible and calcinate at 550°C for 3h to obtain bulk graphite phase carbon nitride; take it out and grind it in a mortar, pass through a 400-mesh sieve, and sonicate in acetone at a mass-volume ratio of 1g:40mL Peel off for 3h to obtain graphitic carbon nitride;

[0035] The sol-gel precursor is prepared according to the molar ratio of citric acid: ethylene glycol: tin tetrachloride pentahydrate: antimony trichloride: graphite phase carbon nitride is 13...

Embodiment 2

[0038] In this example, the preparation method of the antimony-doped tin dioxide photoelectrocatalytic composite electrode modified by graphite phase carbon nitride is as follows:

[0039] The titanium plate was cut into a size of 2.0cm×2.0cm, polished with 400-mesh, 800-mesh, and 1200-mesh sandpaper in sequence, and degreased in 10wt% sodium hydroxide solution for 1h; then heated and etched in 10wt% oxalic acid solution for 2h; finally Rinse well and store in ultrapure water for later use.

[0040] Weigh 20g of melamine in a crucible and calcinate at 550°C for 3h to obtain bulk graphite phase carbon nitride; take it out and grind it in a mortar, pass through a 400-mesh sieve, and then (1g: 40mL) ultrasonically peel it in acetone for 3h, Obtain graphite phase carbon nitride;

[0041] The sol-gel precursor is prepared according to the molar ratio of citric acid: ethylene glycol: tin tetrachloride pentahydrate: antimony trichloride: graphite phase carbon nitride is 130:30:9:1:2...

Embodiment 3

[0044] In this example, the preparation method of the antimony-doped tin dioxide photoelectrocatalytic composite electrode modified by graphite phase carbon nitride is as follows:

[0045] The titanium plate was cut into a size of 2.0cm×2.0cm, polished with 400-mesh, 800-mesh, and 1200-mesh sandpaper in sequence, and degreased in 10wt% sodium hydroxide solution for 1h; then heated and etched in 10wt% oxalic acid solution for 2h; finally After rinsing, put it into ultrapure water and save it for later use.

[0046] Weigh 20g of melamine in a crucible and calcinate at 550°C for 3h to obtain bulk graphite phase carbon nitride; take it out and grind it in a mortar, pass through a 400-mesh sieve, and then (1g: 40mL) ultrasonically peel it in acetone for 3h, Obtain graphite phase carbon nitride;

[0047] The sol-gel precursor is prepared according to the molar ratio of citric acid: ethylene glycol: tin tetrachloride pentahydrate: antimony trichloride: graphite phase carbon nitride ...

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Abstract

The invention relates to a graphite phase carbon nitride modified antimony doped tin dioxide composite photoelectric catalysis electrode and a preparation method and applications thereof. The composite photoelectric catalysis electrode comprises antimony doped tin dioxide and graphite phase carbon nitride; the mole ratio of tin dioxide to graphite phase carbon nitride is 9:1-5; and the preparationmethod comprises following steps: preparing tin-antimony sol gel, adding graphite phase carbon nitride at the same time, and preparing the composite photoelectric catalysis electrode by a sol gel coating-pyrolysis method. Compared with an antimony doped tin dioxide electrode, the results of photoelectric property tests show that the provided electrode has higher catalytic activity and stronger absorption of visible light; and the electrode has a potential application prospect in the fields of solar energy utilization and wastewater treatment.

Description

technical field [0001] The invention relates to a graphite-phase carbon nitride-modified antimony-doped tin dioxide composite photoelectric catalysis electrode, a preparation method and an application, and belongs to the technical field of photoelectric catalysis electrodes. Background technique [0002] With the development of industry and the increase of population, a large amount of wastewater containing persistent refractory organic matter is produced, causing serious pollution to the environment. Traditional wastewater treatment processes cannot completely remove it from water bodies. The anode material is the key in the process of electrocatalytic treatment of wastewater, and its catalytic performance directly determines the treatment efficiency. Titanium-based antimony-doped tin dioxide electrode has a good effect on the treatment of organic wastewater. It has the characteristics of cheap and easy to obtain, excellent catalytic performance, good electrical conductivit...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72C02F1/30C02F101/30
Inventor 慕彦光李海普杨兆光黄聪
Owner CENT SOUTH UNIV
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