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Synthesis method of load type carbon modified titanium dioxide photocatalyst

A titanium dioxide and photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve problems such as limiting the application range of TiO, low solar energy utilization efficiency, and no catalytic ability, so as to promote Visible light degradation performance, increase surface photosensitivity performance, increase the effect of adsorption performance

Inactive Publication Date: 2012-08-01
常州顺意新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the promotion and application of TiO2 encounters two bottlenecks: (1) TiO2 has a large band gap and can only be excited by ultraviolet light in sunlight, such as anatase TiO2 has a forbidden band width Eg=3.2 eV, which can only absorb light with a wavelength of less than 387 nm in the ultraviolet region, and the utilization efficiency of solar energy is low; (2) The research on TiO2 is concentrated Due to TiO2 powder, the application range of TiO2 is limited
Bentonite has many applications in water treatment, but it is only limited to adsorption treatment, and it has no catalytic ability itself.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 60 ml of absolute ethanol (analytical grade) and 40 ml of n-butyl titanate (analytical grade), and stir magnetically for 30 min to obtain light yellow clear solution A; mix 96 ml of 1mol / L nitric acid with 100 ml mixed with absolute ethanol to obtain solution B; slowly add solution A dropwise to solution B while vigorously stirring, continue stirring for 30 min after the dropwise addition, and then add dropwise 0.1 mol / L NaOH solution to the solution, so that n (NaOH):n(HNO 3 )=1:3, after the addition, continue to stir for 30 minutes to obtain the titanium pillar solution; weigh 10 g of ground natural bentonite, add a certain amount of distilled water to make a 2% solution, soak for 10 h, and then stir Add cetyltrimethylammonium bromide solution dropwise, the concentration of cetyltrimethylammonium bromide solution is 1 g / L, the total amount of cationic surfactant used is 0.4 times of the corresponding bentonite cation exchange capacity, continue stirring after the ...

Embodiment 2

[0024] Mix 80 ml of absolute ethanol (analytical grade) and 45 ml of n-butyl titanate (analytical grade), and stir magnetically for 30 min to obtain light yellow clear solution A; mix 100 ml of 1mol / L nitric acid with 105 ml of Mix absolute ethanol to obtain solution B; slowly add solution A dropwise to solution B while vigorously stirring, continue stirring for 30 min after the dropwise addition, and then add dropwise 1 mol / L NaOH solution to the solution so that n(NaOH ):n(HNO 3 )=1:3, after the addition, continue to stir for 30 minutes to obtain the titanium pillar solution; weigh 15 g of ground natural bentonite, add a certain amount of distilled water to make a 2% solution, soak for 10-12 h, and then Add tetramethylammonium bromide solution dropwise while stirring, the concentration of tetramethylammonium bromide solution is 10 g / L, the total amount of cationic surfactant used is 0.9 times the corresponding bentonite cation exchange capacity, and continue stirring for 1.5...

Embodiment 3

[0027] Mix 70ml of absolute ethanol (analytical grade) and 42ml of n-butyl titanate (analytical grade), and stir magnetically for 25 minutes to obtain light yellow clear solution A; mix 98ml of 1mol / L nitric acid with 102ml of Mix absolute ethanol to obtain solution B; slowly add solution A dropwise to solution B while vigorously stirring, continue stirring for 30 min after the dropwise addition, and then add dropwise 0.5 mol / L NaOH solution to the solution so that n(NaOH ):n(HNO 3 )=1:3, after the addition, continue to stir for 30 minutes to obtain the titanium pillar solution; weigh 12 g of ground natural bentonite, add a certain amount of distilled water to make a 2% solution, soak for 11 h, and then stir Add the dodecyltrimethylammonium bromide solution dropwise, the concentration of the dodecyltrimethylammonium bromide solution is 8 g / L, the total amount of cationic surfactant used is 0.7 times the corresponding bentonite cation exchange capacity, and continue stirring af...

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Abstract

The invention discloses a synthesis method of a load type carbon modified titanium dioxide photocatalyst. The synthesis method comprises the following steps of mixing absolute ethanol and titanium tetrabutoxide to obtain a solution A; mixing HNO3 and absolute ethanol to obtain a solution B; adding the solution A into the solution B dropwise and adding NaOH solution dropwise to obtain titanium column brace liquid; adding cationic surfactant solution into natural bentonite solution dropwise to prepare organic modified bentonite turbid liquid; adding the titanium column brace liquid into the organic modified bentonite turbid liquid dropwise, ultrasonically oscillating and ageing to obtain powder; and calcining the powder under the vacuum condition to obtain load type carbon modified titanium dioxide. Carbon and TiO2 nanopaticles are implanted between the nano layers by utilizing the cation exchange characteristic of the bentonite to form a three-dimensional nanopore structure, so that the specific surface area of the bentonite is enlarged and the adsorption performance of the bentonite is enhanced. The TiO2 and the carbon particles are combined tightly on the surface, so that the surface photosensitivity of the TiO2 can be improved and the visible light degradability is improved. The TiO2 between the bentonite layers has nanosize, so that the nanoeffect can be exerted.

Description

[0001] technical field [0002] The invention relates to a synthesis method of a photocatalyst, which belongs to the technical field of sewage treatment in environmental protection. Background technique [0003] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. In 1972, A. Fujishima and K. Honda in the n-type semiconductor TiO 2 Photocatalytic decomposition of water found on electrode, TiO 2 It has high oxidation activity, good chemical stability, non-toxicity to human body, low cost, no pollution, and wide application range, so it has received the most attention. It is currently the most widely used nano-photocatalytic material, and it is also the most promising green environmental protection type. catalyst. [0004] Among many oxide photocatalytic materials, TiO 2 Due to its strong oxidation, non-toxicity, light and chemical stability, and low cost, it has becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J21/06B01J35/10C02F1/72C02F1/30
CPCY02W10/37
Inventor 马建锋李定龙崔冰莹张天立
Owner 常州顺意新能源科技有限公司
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