Preparation method of ferrous sulfide/attapulgite composite

A technology of attapulgite and ferrous sulfide, which is applied in catalyst activation/preparation, chemical instruments and methods, separation methods, etc., can solve the problems of limited optical coupling-SCR application, insufficient visible light utilization efficiency, and no reports, etc. High industrial promotion value, beneficial to catalytic activity, and the effect of increasing lattice defects

Inactive Publication Date: 2018-05-18
盱眙县中材凹凸棒石粘土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide and dye-sensitized titanium dioxide have been reported as photocoupling-SCR catalysts, however, due to the insufficient utilization efficiency of visible light, electron and hole pairs are easy to recombine, which greatly limits the application of photocoupling-SCR.
[0004] Attapulgite (ATP) is a low-cost natural mineral. It has a one-dimensional chain-like nanopore structure on the microscopic scale. Water molecules and organic molecules of a certain size can be directly adsorbed in its pores. As a catalyst carrier, it has natural Advantages. In recent years, there have been many reports on materials composited with attapulgite and semiconductors, but there have been no reports on the composite of ferrous sulfide and attapulgite.

Method used

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  • Preparation method of ferrous sulfide/attapulgite composite
  • Preparation method of ferrous sulfide/attapulgite composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Weigh 0.47g of ferric nitrate, 1.5g of thioacetamide and 0.21g of attapulgite, add 60ml of deionized water to ultrasonic and stir for 30min; transfer the mixture to a reaction kettle at 220°C for 24h; multiple times Wash with water and alcohol, and dry at 100°C for 24 hours to obtain the ferrous sulfide / attapulgite composite material.

[0023] The morphology and structure of the obtained samples were observed under a transmission electron microscope, such as figure 1 As can be seen from the figure, the small particles of FeS 2 Evenly loaded on the surface of the attapulgite.

[0024] Add 150 mg of ATP and FeS to the quartz tube of the light-assisted-SCR de-pinning device 2 , FeS 2 / ATP; NH 3 , NO, O 2 The initial concentrations are: 1000ppm, 1000ppm, 3% (relative to the total gas flow), and the space velocity is 25000h -1 , the total gas flow rate is controlled at 100ml / min, the light source used is a 500W xenon lamp, and the light wavelength is: 380-78...

Embodiment 2

[0025] Example 2: Weigh 0.47g of ferric nitrate, 1.5g of thioacetamide and 0.08g of attapulgite, add 60ml of deionized water to ultrasonic and stir for 30min; transfer the mixed solution to a reaction kettle at 200°C for 16h; Wash with water and alcohol, and dry at 60°C for 12 hours to obtain the ferrous sulfide / attapulgite composite material. Subsequent detection was as in Example 1.

Embodiment 3

[0026] Example 3: Weigh 0.47g of ferric nitrate, 1.5g of thioacetamide and 0.32g of attapulgite, add them into 60ml of deionized water and stir for 30min after ultrasonication; transfer the mixed solution to a reaction kettle at 180°C for reaction 20h; washing with water and alcohol, and drying at 80°C for 16h to obtain the ferrous sulfide / attapulgite composite material. Subsequent detection was as in Example 1.

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Abstract

The invention relates to a preparation method of a ferrous sulfide/attapulgite composite and belongs to the field of utilization of nonmetal mineral materials. The preparation method comprises the steps as follows: a certain amount of ferric nitrate, thioacetamide and attapulgite are weighed and added to deionized water for ultrasonic treatment and stirring, a mixed liquid is transferred to a reaction kettle to react at the temperature of 160-220 DEG C, water washing and alcohol washing are performed after the reaction, drying is performed, and the ferrous sulfide/attapulgite composite can beobtained. The prepared ferrous sulfide/attapulgite composite is uniform in loading and good in dispersity, experimental raw materials are easy to obtain, no complicated equipment is required, and theferrous sulfide/attapulgite composite has a good low-temperature conversion effect on nitrogen oxide under the assistance of light.

Description

technical field [0001] The invention relates to the technical field of non-metallic minerals, in particular to a preparation method of a ferrous sulfide / attapulgite composite material. Background technique [0002] As a kind of environmental pollutants, nitrogen oxides seriously endanger people's health. They are the main pollutants that form acid rain and smog. They mainly come from power plants and automobile exhaust emissions. Commercialized industrial denitrification catalysts mainly include WO 3 -V 2 o 5 / TiO 2 and MoO 3 -V 2 o 5 / TiO 2 . However, these catalysts can only have denitrification activity in the higher temperature range (300-400 °C), and V 2 o 5 It is biologically toxic, so it is urgent to develop green, low-temperature and high-efficiency NH 3 -SCR catalyst. Photoselective catalytic reduction (photo-SCR) can work at lower temperature and reduce energy consumption. TiO2 and dye-sensitized TiO2 have been reported as photocoupling-SCR catalysts, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J37/10B01D53/86B01D53/56
CPCB01D53/8628B01J27/043B01J35/004B01J35/0093B01J37/10
Inventor 于龙庆鲁光辉姚超李霞章
Owner 盱眙县中材凹凸棒石粘土有限公司
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