Method of taking wastes as carbon source to prepare carbon doped titanium oxide visible light catalyst

A titanium oxide, waste technology, applied in physical/chemical process catalysts, chemical instruments and methods, water pollutants, etc., can solve problems such as catalyst waste, achieve good dispersion, low temperature, and achieve the effect of double pollution control

Active Publication Date: 2019-06-18
INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, since the photocatalytic reaction mainly occurs on the surface of the photocatalyst, the porous carrier usually cannot perform the photocatalytic effect well, but causes a waste of the catalyst.

Method used

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  • Method of taking wastes as carbon source to prepare carbon doped titanium oxide visible light catalyst
  • Method of taking wastes as carbon source to prepare carbon doped titanium oxide visible light catalyst
  • Method of taking wastes as carbon source to prepare carbon doped titanium oxide visible light catalyst

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preparation example Construction

[0037] 1) Preparation of carbon precursor-titanate melt: mix anhydrous sodium hydroxide and anhydrous potassium hydroxide, and melt at 180 ℃ ± 2 ℃, 0.1 MPa for 60 min ± 2 min to prepare the mixed Alkali clarification solution; fern leaf powder and titanium dioxide powder are added to the mixed alkali clarification solution, and stirred for 5-6 minutes to obtain fern leaf + sodium hydroxide + potassium hydroxide + titanium dioxide molten clarification solution; fern leaf + sodium hydroxide + hydroxide Potassium+titanium dioxide molten clarified solution was kept at 180 ℃±2 ℃ and 0.1 MPa for 720 min±10 min to obtain sodium hydroxide+potassium hydroxide+(NaOH 2 CO 3 +K 2 CO 3 )+carbon precursor-titanate melt;

[0038] 2) Add sodium hydroxide + potassium hydroxide + (Na 2 CO 3 +K 2 CO 3 )+carbon precursor-titanate melt, add a hydrochloric acid solution with pH=1, stir for 10 min, then naturally cool to room temperature, centrifuge, and take the off-white product in the lowe...

Embodiment 1

[0049] A method for preparing a carbon-doped titanium oxide visible light catalyst using waste as a carbon source, comprising the following steps:

[0050] 1) Preparation of carbon precursor-titanate melt: mix anhydrous sodium hydroxide and anhydrous potassium hydroxide, and melt at 180 °C and 0.1 MPa for 60 min to prepare a mixed alkali clarification solution; Add the leaf powder and titanium dioxide powder into the mixed alkali clarification liquid, stir for 5-6min, and obtain fern leaf + sodium hydroxide + potassium hydroxide + titanium dioxide molten liquid; put fern leaf + sodium hydroxide + potassium hydroxide + titanium dioxide molten liquid at 180 ℃, 0.1 MPa conditions for 720 min, to obtain sodium hydroxide + potassium hydroxide + (Na 2 CO 3 +K 2 CO 3 )+carbon precursor-titanate melt;

[0051] 2) Add sodium hydroxide + potassium hydroxide + (Na 2 CO 3 +K 2 CO 3 )+carbon precursor-titanate melt, add a hydrochloric acid solution with pH=1, stir for 10 min, then ...

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Abstract

The invention belongs to the field of titanium oxide preparation, and specifically relates to a method of taking wastes as a carbon source to prepare a carbon doped titanium oxide visible light catalyst. Sodium hydroxide and potassium hydroxide are mixed and taken as a melted solvent; agricultural and forestry wastes (fern leaves) and titanium dioxide are taken as the raw materials; a hydrochloricacid solution with a pH value of 1 is taken as an extracting agent; deionized water is taken as a washing agent and a detergent; anhydrous ethanol is taken as a detergent and a dry carrier; under a normal pressure, at a low temperature of 180 DEG C, a carbon precursor-titanate composite material is synthesized, and the composite material is burned at a temperature of 450 DEG C to obtain the carbon doped titanium oxide catalyst with a porous structure. The product purity is high, the chemical and physical properties are stable; the carbon surface contains hydrophilic functional groups, thus the carbon doped titanium oxide catalyst has good water dispersibility, moreover, the light responding range is enlarged to the visible light waveband of sunlight, and the catalyst has visible light catalytic activity.

Description

technical field [0001] The invention belongs to the field of preparation of titanium oxide materials, and in particular relates to a method for preparing a carbon-doped titanium oxide visible light catalyst using waste as a carbon source. Background technique [0002] Environmental pollution has become an urgent problem to be solved in the 21st century. Polluted water sources have brought more and more serious impacts on people's lives. Photocatalytic technology plays an important role in pollution control and environmental protection. It can directly convert light into chemical energy, promote the synthesis and degradation of compounds, and has the advantages of low energy consumption, high efficiency, no secondary pollution, and reusability. It has become a focus of extensive attention and research in many scientific research fields. Titanium dioxide (TiO 2 ) has stable chemical properties, is not prone to photocorrosion after being illuminated, is low in cost, has high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C02F1/30C02F101/30
Inventor 陈彪李洁黄婧肖艳春
Owner INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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